Whereas: P power = I current X E voltage
Whereas: E voltage = I current x R resistance
Whereas: P power = I current x I current x R resistance
Whereas: when R resistance increases, P power also increases
Therefore: I proclaim, that it is better to use High Ohm speakers, better 8 than 4, or even better 16 ohm.
It is my opinion that putting all the speakers in PARALLEL is much preferred.
Putting two 16 ohm speakers in PARALLEL makes the total ohms 8 ohms
You can put four 16 ohm speakers in Parallel for 4 ohms, per channel
You can put eight 16 ohm speakers in Parallel for 2 ohms, per channel,
the most efficient setup: Speaker Ohms to the max, Run at the lowest Ohms, 2 ohms
Pick a Power Amp to closely match the Speaker Watts,
but the Speaker Watts need to be more than the power of the amp
else you could fry the speakers.
The Watts of the speakers must be more than the Watts of the Amp



Speakers range from 50 Watts to 500 Watts. In this case a Swamp Thang by Eminence is 150 Watts per speaker, weather they be in Series, or Parallel, or Series Parallel, Watts Add Up. Thus the system on the right with 8 speakers per channel is 150 Watts X 8 = 1200 watts per channel or 2,400 watts Total. IF you need MORE POWER, you can either get 32 ohm speakers and put them in Parallel 16 speakers per side and run it all at 2 ohms per side. Get a bigger amp and the total resistance or ohms is 16 X 150 Watts = 2400 watts per channel or 4800 Watts total stereophonic sound. However, 32 ohm speaker might get expensive in that you need more of them, double the amount, and might not have the desired Frequency Range or DB. There is a limited selection of 32 ohm speakers. So instead, you can stick with 16 ohm speakers, 8 speakers per channel stereo, and call that system 1 and you can add more systems such as system 2, system 3. OR you can replace each speaker with two 16 ohm speakers in series make 32 ohms in parallel (8 pairs).

I just found a reasonable 32 ohm speaker, SWAMP THANG by Eminence and its only $79, but you need twice as many, but then you are talking sound system. Perhaps Celestion also has it as well?
Uh oh, they took it down, they had it up, they probably saw this page or someone bought them out and they thought Only $79? we have to charge more, but you see, in order to use them, you have to by large quantity and that is your price break, or perhaps people are trying to hook up 32 ohms to a regular amp, can't do that, no no no no. Well someone has some 32 ohm speakers, talk with your favorite dealers. They took it down. It was there. I saw it. Invasion of the Body Snatchers it was there.
OK, I found it, it was not a Swamp Thang branch of Eminence but was Eminence https://www.sweetwater.com/store/detail/LegendB810--eminence-legend-b810-legend-series-10-inch-150-watt-replacement-bass-speaker-32-ohm This is the Key, this is The Key! Uh oh, 49Hz-5.1kHz it wont go to a low E on the bass, and there is no graphic bar chart to show, but perhaps it might pick up a low E anyway, I would investigate. AND OR since it is in parallel, you can intermingle other 32 ohm speakers with a different range or two 16 ohms in series would be a replacement for any one of the 32 ohms, so there are options. As well as, effectively, this might only be 3000 to 4000 Watts, so use 4 Systems like this, and have one or two of the systems dedicated to low frequency, I like LOW FREQUENCY

WATTS ADD UP: if you have a 100 watt amp, it is the same as 5 amps that are 20 watts each.

AsTheNightGoes
RockingAgain



4800 Watts in speakers, match up a power amp that is less than 4800 Watts, for safety
Lets say you have 7 instrumentalists including percussion, and 3 vocalists = 10 shares of sound
That's around 480 Watts per musician
You can also get another system just like this and have 2 or 3 systems.
It's hard to find Wide Frequency Range speakers, 40Hz or less up to 5KHz or more
So you can run all the lows thru one system, with a variety of bass speakers and sub woofers
At these big concerts, I want to hear MORE BASS. I was very impress by YES, I think it was the Forum in Inglewood? rotating stage, 1980's, and the low bass on keyboards started the show, very very low and powerful, like the IMAX at the Luxor in Las Vegas.



UNIT 2 of 4
In ADDITION to the Unit 1 of 4 above, that frequency carries maybe 50Hz to 5KHz; it might be good to cover Low Frequencies down to 20Hz if possible, but certainly to at least 30Hz.
Such as the https://usspeaker.com/eighteensound-21LW1400-1.htm $529.99
Diameter 21" / 533mm
Impedance 8 ohms
AES Power Rating 1,500 Watts
Program Power 3,000 Watts
Sensitivity (1W/1m) 99dB SPL
Frequency Response 24Hz - 2.0kHz a good overlap with Unit 1
Perhaps 2 in parallel on each side for Unit 2 of 4?



Also See My Musical Equipment Page http://www.archure.net/science/howonearth.html



You can mount speakers in the boxes they came in, paint the boxes flat black, put some hardware store screen on it, like CCR. Or at least some sort of lightweight housing.

TIP FOR THE DAY: "It was nice music, and not really too loud, but IT HURT MY EARS???" = cracked tweeter (start pulling tweeters, it wont wreck the impedance balance). Ceramic Tweeters are prone to this. I am not certain about Ceramic Speakers such as Coaxial speakers? but keep it in mind just in case.

I used to chat with Phil Lesh about sound systems, and speakers being IN PHASE. If one speaker is PUSHING OUT at 2,000 cycles per second and at the same time another speaker is PULLING IN at 2,000 cps, they tend to cancel each other out "IT WAS REAL LOUD, BUT YOU COULDN'T HEAR ANYTHING?" = SPEAKERS OUT OF PHASE. If you know which speaker is out of phase you can REVERSE THE WIRING connecting the speaker. For this reason it is good to use the same speakers from the same reliable manufacturer, I would hope that all + markings would go together in parallel. TO FIND AND FIX THIS ISSUE, YOU NEED A DUAL TRACE OSCILLOSCOPE: Use a 2 channel oscilloscope, put "mic A" on one speaker, get the wave form, then get the same waveform from the same speaker with "mic B", then invert the Mic B signal, then it looks like a wave and an inverted wave and use mic B to check all the other speakers, in comparison with mic A on the original speaker, if you don't see the full double wave, either its out of phase or dead, mark it with Duck Tape and reverse the phase wiring later. AND AND, ANOTHER TIP "it isn't loud and the music is nice but its hurting my ears?" = cracked tweeter (cheap ceramics), pull each tweeter one by one (should not affect the impedance in this case). For this reason, I am also hesitant of Coaxial Speakers, as they are made with ceramic, same as tweeters, and not realizing it, I ended up with a pair 400 W each (peak?) would be 280 RMS and I have a (made famous by Jefferson Airplane bassist Jack Casady, and Willie Nelson used to use them) Radio Shack 125W/125W stereo and 125 W / 400 W = 31% is the minimum allowable, but putting a "Eurorack MX802 A" 4 channel mixer I can pre-amp it and up the volume, So if wired properly, and run at 30% or 50%, I would guess that would hold, and they have a wide frequency range (my main objective)

I also herd tell you can pre-amp the left/weaker side of a Marshall, was apparently intended to be pre-amped "is what they do in England" is what I herd tell? I don't know how they wire them, but if you can use 16 ohm speakers all 4 in parallel and run it at 4 ohms per cabinet, is that how they run? is it a 4 ohm machine? per cabinet x 2 cabinets? I looked up some Marshall amp specs: they vary, some don't list the ohm out? but at least a couple of 100 W expensive Marshall amps have: output (4/8/16 ohms). But check for your model. OR, OR, OR, you could put 4 speakers 32 ohms each (more powerful) in parallel and run it at 8 ohms, preamp the left side, and crank it up. However, with a 100 Watt amp, run no less than 30% would be no more than 300 Watts worth of Speakers, 300 Watts / 8 speakers in a stack = 37 watts per speaker???? Thus I would tend to go with the manufacturer's specifications, see what they say, the speakers should match the head.

Its important to keep all the speakers IN PHASE, using a Dual Trace Oscilloscope. I used the old kind when I was a kid, and now they have these new fangled digital scopes, but will they INVERT a 2nd phase? I dunno? I would not trust an Agilent scope (they believe in "theoretical ground, you don't really need to ground everything" ignoramus idiots, because you need to ground everything). They were a spinoff of Hewlet Packard, the King of Inside Electronics (not for home use, unless your really into it), with programable scopes that show bar graphs and slopes based on formulas, you don't really need that today. But HP is the best, but keep in mind, that HP computers are just a spin off, just as Agilent was? will HP computers behave and comply? HP computers has potential for being the best by far, I have not herd any current reviews.).

Did I hear it from Phil Lesh or ??? that they were all playing at different sections of graphic equalizers? each musician had assigned frequency ranges??? I don't know if they still do that or how long they did?, I myself would prefer full range for everything, especially with newer items such as Roland MIDI and electronics drums and keyboards, leave it as intended, don't limit it. unless there is some conflict between two instruments then you can use a graphic equalizer, but I don't know what they do these days? I used to hang with The Dead and others after music classes at College Of Marin Kentfield, and we would shop talk, music theory, electronics. I am into V of V. which is 1, 4, 4 of 4, 4, then repeat, the inverse logic being V of V and your tonic is the V of V, is how my theory professor Dr Stan Krasic saw it.

by the way, Agilent (a spin off of Hewlett Packard, the King of electronics) was in Sonoma, and I know what their problem is. They believe in Theoretical Ground and for that reason, it does not work right. Symptoms: a transistor used as a switch, if not properly grounded does not know where ground is and does not work real well the first attempt but the 2nd attempt is worse along with the 3rd etc,

close the switch, close in relation to what? ground.
no ground = no good (Agilent = crap)
and I will tell you another name in crap = Allen Bradley (currently owned by Rockwell? I don't know the history)
I think they are trying to disgrace the name Bradley (Bradley fighting vehicle on 60 minutes, amphibious troop carrier, sank in water, and bullets went right thru the bullet proof sides, etc).


while I am slinging it CRATE AMPS were designed to fall apart. a conspiracy against rock. Removing the speaker cable, people tend to wiggle it back and forth, dislodges the internal socket which is secured only by Solder, and can not be bypassed as there are extra wires going thru the socket and to the board what a trap, thieves

but all that was 30 years ago, perhaps Allen Bradley electronics has changed its tune? or maybe not. For electronic components, chips, Go Motorola. Other good names Dale, Mepco....... (you pay 3 more cents for a Dale or Mepco resistor, but it works, probably in spec). I used to work for various major companies, some of whom would buy Allen Bradley and waste a fortune testing and retesting and god help them that a bad one would somehow make it into a circuit in some box that cost $400,000.00 ?????? who knows. But work on my own computer, oh no.



https://usspeaker.com/homepage.htm
Has many of these, AND you can also shop thru SWEETWATER, SAM ASH, GUITAR CENTER, MUSICIANS FRIEND, all have web pages. These are just my notes of WATT interested me

When I first started writing this, I was unaware of the extra speaker wattage preferred, so some of these SPEAKER to AMP matches might have to be redone, considering "peak power handling is typically 4 times its continuous power handling"

HW205 Item Price: $119.95 https://usspeaker.com/ciare-hw205-1.htm 
backorder 35Hz - 5kHz    200w/400w 

https://usspeaker.com/ciare%20hwb200-4ohm-1.htm 
30Hz - 2.5kHz 

https://usspeaker.com/ciare%20hwb200-8ohm-1.htm
30Hz - 2.5kHz 

8" 8 ohm 8BFR 50W/100 30Hz-6KHz $59.99 
https://usspeaker.com/Eminence%20Kappa%2015LFA-1.htm 
15" 600W/1200W 38Hz 2.7kHz 


*********************************************
beyma 10BR60v2 100W/200W 10" 30Hz-5kHz $105.95 
*********************************************
beyma 25Hz-4kHz 125W/250W 8 ohm 12"  $125.99  12BR70 get QTY 2 for stereo 

 Item ID: XLI800 Crown XLi 800 300W 2-channel Power Amplifier
2-channel Power Amplifier, 300W Continuous/ch at 4 ohms, with Flexible I/O, 
Selectable input voltage, Forced air cooling

https://www.sweetwater.com/store/detail/XLI800--crown-xli-800-power-amplifier 
*********************************************

A good BASS speaker needs at least 40Hz to 400Hz
This is just good for adding lows to a system that goes from 100Hz to 5000Hz 
20-200Hz 
https://usspeaker.com/ciare%201500sw-1.htm 

BEYMA a name that has impressed me with their specs ie specifications 
THIS IS WHAT WE NEED:  PERFECT FULL RANGE, keyboards, and full range system 
30Hz - 6.0kHz 
https://usspeaker.com/beyma%208BFR-1.htm


https://en.wikipedia.org/wiki/Musical_acoustics#Pitch_ranges_of_musical_instruments

THIS RANGE IS EFFECTIVE it misses a few high notes from piano or violin
and 5kHz or more would be desirable for overtones and quality 
but with this, all should be herd, including a 5 string bass with a low B, but no further 
30Hz - 2.5kHz
https://usspeaker.com/ciare%20hwb200-4ohm-1.htm 
https://usspeaker.com/ciare%20hwb200-8ohm-1.htm 


https://usspeaker.com/beyma%2012CXA400nd-1.htm

EXCELLENT LOW 25Hz ooooh and up to 2.5Hz keyboard and full range, ooooooh
CIARE $139.95 12"  150W/300W  25Hz - 2.5kHz  8 ohm 
https://usspeaker.com/ciare-hw321-1.htm

not a Bass Guitar speaker which needs 40Hz to 400Hz 
but an EXCELLENT addition to a full system 20Hz OH MY GOD 
https://usspeaker.com/ciare%201200sw-1.htm
Caire 20Hz-200Hz 1000W/2000W 12" $319.95 12.00SW 


Everything from a Low D if you tune the Bass down a whole step
all the way to most music except the top notes of a violin or keyboard 
basically a full range speaker, but bass can easily be herd 
Bass Speaker $94.99 but no low B 
Eminence Legend BP122 12" 250-watt (RMS) Bass Amp Replacement Speaker
12" Bass Speaker, 250W, 8 Ohms, 35Hz-2.3kHz 


//////////////////////////////////////////////////////////
https://www.sweetwater.com/store/detail/PX3--yamaha-px3-power-amplifier 
Yamaha PX3 500W 2-channel Power Amplifier
2-channel Power Amplifier, 500W, with EQ, Filter, Crossover, Delay, Limiter, and 
Power Boost Functions
$499.99 
Number of Channels:	2
Power Class:	Class D
Watts/Side @ 8 ohms:	300W
Watts/Side @ 4 ohms:	500W
Watts/Side @ 2 ohms:	300W
Watts Bridged:	600W @ 8 ohms, 1000W @ 4 ohms 
USE BRIDGED @ 8 ohm:  qty four speakers, each 32 ohm 150 Watt Eminence 
https://www.sweetwater.com/store/detail/LegendB810--eminence-legend-b810-legend
-series-10-inch-150-watt-replacement-bass-speaker-32-ohm 
49Hz-5.1kHz (does not get a low E on the bass)
4 for $320 
OR OR OR your could use stereo: (best for me)   2 speakers in parallel on each side 
Eminence Swamp Thang 16 ohm 150 Watt, 2 in parallel, each side at 8 ohms 
https://www.sweetwater.com/store/detail/SwampThang16--eminence-swamp-thang-12
-inch-150-watt-16-ohm-replacement-speaker 
not a bass speaker 
4 for $440 

Yamaha Amp $500 
4 (32 ohm) Speakers $320 in parallel amp bridged 
1 mixer $60 https://www.sweetwater.com/store/detail/802--behringer-xenyx-802-mixer 

$880 600 Watt amp, but not a low E, wont kick in till an Ab (A flat)  

/////////////////////////////
BASS and FULL RANGE OPTION not stereo, amp at 8 ohm bridged 600 W 
Keyboard and Bass 
FAITAL PRO 15FH520 - 15" WOOFER 
600 WATTS AES & 1,200 WATTS PROGRAM POWER 
8 Ohm Version Item Price: $337.95 
Frequency Response	40Hz - 4kHz
Sensitivity (1W/1m)	98dB SPL  
AES Power Rating	600 Watts
Program Power	1,200 Watts
https://usspeaker.com/faital%20pro%2015FH520-1.htm 


$500 Yamaha Amp $500 1  amp bridged 
$60 1 mixer  https://www.sweetwater.com/store/detail/802--behringer-xenyx-802-mixer 
$338 1 speaker 600 W 

$898 for a 600 Watt full range & bass amp

don't expect any speaker to go below Resonant Frequency, in this case 
Resonant Frequency (fs)	38 Hz   (thats very close??? I would ask them?) 


/////////////////////////////
STEREO FULL RANGE & BASS OPTION what I could use 

https://www.sweetwater.com/store/detail/IPR2-3000--peavey-ipr2-3000-power-amplifier 
$600  Peavey IPR2 3000 Power Amplifier
2-channel Power Amplifier, 840W RMS/ch at 4 ohms, with built in Crossovers, Speaker Protection, lightweight 7.9 lbs chassis
Number of Channels:	2
Power Class:	Class D
Watts/Side @ 8 ohms:	525W
Watts/Side @ 4 ohms:	950W
Watts/Side @ 2 ohms:	1750W

qty 2, one for each side stereo 
BASS and FULL RANGE OPTION not stereo, amp at 8 ohm bridged 600 W 
Keyboard and Bass 
FAITAL PRO 15FH520 - 15" WOOFER 
600 WATTS AES & 1,200 WATTS PROGRAM POWER 
8 Ohm Version Item Price: $337.95 
Frequency Response	40Hz - 4kHz
Sensitivity (1W/1m)	98dB SPL  
AES Power Rating	600 Watts
Program Power	1,200 Watts
https://usspeaker.com/faital%20pro%2015FH520-1.htm 


$600 amp 
$60 mixer 
$676 for 2 speakers 600 watt RMS 8 ohm per side x 2 = 1200 Watts 

$1336 for 2 speaker stereo full range & bass amp (lightweight, powerful)


OR OR OR  

130 Watt full range mono 

https://www.sweetwater.com/store/detail/EPQ304--behringer-europower-epq304-power-amplifier 
$199 Behringer Europower EPQ304 Power Amplifier
4-channel Power Amplifier, 75W Peak/ch at 4 Ohms,
Number of Channels:	4
Power Class:	Class D
Watts/Side @ 8 ohms:	40W RMS
Watts/Side @ 4 ohms:	65W RMS
Watts Bridged:	130W RMS at 8 ohms  USE BRIDGED WITH 1 SPEAKER HWB200-8 

CIARE HWB200-8 IS A HIGH POWER 8" SPEAKER 
130 WATTS AES / 260 WATTS PROGRAM
FS OF 32HZ, WIDE FREQUENCY RANGE FROM 30HZ TO 2.5KHZ & BIG MOTOR
8 ohm Item Price: $129.95
https://usspeaker.com/ciare%20hwb200-8ohm-1.htm 


$200 Amp bridged only  
$139 Speaker  30HZ TO 2.5KHZ
$60 mixer 

$399 bridged amp 130 Watts, 30 hz to 2.5Khz full range & bass

/////////////////////////

more FULL RANGE with more Power 

it has a good frequency range, so lets start with 

CIARE HWB200-8 IS A HIGH POWER 8" SPEAKER 
130 WATTS AES / 260 WATTS PROGRAM
FS OF 32HZ, WIDE FREQUENCY RANGE FROM 30HZ TO 2.5KHZ & BIG MOTOR
8 ohm Item Price: $129.95
https://usspeaker.com/ciare%20hwb200-8ohm-1.htm 


//////////////////////////// 
or this has a better range for Bass 

https://usspeaker.com/beyma%2012BR70-1.htm
BEYMA 12BR70 - 12" PRO WOOFER  Item Price: $125.99 
12" / 300mm  
8 ohms
RMS Power Rating 125 Watts
Program Power 250 Watts  
Frequency Response 25Hz - 4.0kHz
Sensitivity (1W/1m) 93dB

Samson Servo 300 Power Amplifier  $299.99 
https://www.sweetwater.com/store/detail/Servo300--samson-servo-300-power-amplifier 
Number of Channels:	2
Watts/Side @ 8 ohms:	100W
Watts/Side @ 4 ohms:	150W
Watts Bridged:	300W @ 8 ohms


$252 qty 2 speakers $126 each BEYMA 12BR70 - 12" - 125 Watt each
$300 Samson Amp 
$60 mixer 

$612 for 2 speakers stereo 100 watts per side or 200 watts total, GREAT FOR BASS & organ 
When I first started writing this, I was unaware of the extra speaker wattage preferred, so some of these SPEAKER to AMP matches might have to be redone, considering "peak power handling is typically 4 times its continuous power handling"



SOUND SYSTEM LINKS & QUOTES



How Much Sound Is Desirable?

https://www.crownaudio.com/how-much-amplifier-power

Folk music in a coffee shop with 50 seats: 25 to 250 W
Folk music in a medium-size auditorium, club or house of worship with 150 to 250 seats: 95 to 250 W
Folk music at a small outdoor festival (50 feet from speaker to audience): 250 W
Pop or jazz music in a medium-size auditorium. club or house of worship with 150 to 250 seats: 250 to 750 W
Pop or jazz music in a 2000-seat concert hall: 400 to 1,200 W
Rock music in a medium-size auditorium, club or house of worship with 150 to 250 seats: At least 1,500 W
Rock music at a small outdoor festival (50 feet from speaker to audience): At least 1,000 to 3,000 W
Rock or heavy metal music in a stadium, arena or amphitheater (100 to 300 feet from speaker to audience): At least 4,000 to 15,000 W
Although a rock concert in an arena could be powered by 15,000 watts (allowing only 6 dB of headroom for peaks,) you'll often see large touring sound companies using 80,000 to 400,000 watts total. That much power is needed to handle 20-to-24 dB peaks without any clipping, and to power extra speakers for even coverage of a large area.


ARCHURE seyz: A ROCK ensemble, Must Have Ample Amplification; else be demoted to Pop, and then you have to dance around. Rockers, no choreography required, but you can do it, such as The Who.




Coffee house: 16 to 32 feet (4.8 to 9.8 m)
Small club or auditorium: 32 feet (9.8 m)
Medium club, auditorium or house of worship: 45 feet (13.7 m)
2000-seat concert hall: 110 feet (33.5 m)
Small outdoor festival: 50 feet (15.2 m)
Stadium or arena: 100 to 300 feet (30.5 to 91.4 m)

calculator: 33 meters or 100 feet, desired DB 90, speaker sensitivity 86 db, amp headroom 3, = required aplification 5,458 watts
https://www.crownaudio.com/en-US/tools/calculators#amp_power_required

WATTS ADD UP: if you have a 100 watt amp, it is the same as 5 amps that are 20 watts each.



If one loudspeaker won't handle the total power required, you need to divide the total power among multiple loudspeakers and multiple amplifier channels. For example, suppose you need 1000 watts to achieve the desired average loudness, but your speakers power handling is 250 watts continuous. You could use a power amplifier of 500 watts per channel. Connect two loudspeakers in parallel on each channel. That way, each speaker will receive 250 watts (not considering the change in amplifier power at different impedances, and not considering cable losses).

Note that if you parallel two speakers, their total impedance is halved. For example, two 8-ohm speakers in parallel have an impedance of 4 ohms. In that case, each speaker would receive half of the amplifier's 4-ohm power.

........................
Suppose you need to supply 1000 watts for peaks, and your speaker's continuous power handling is 250 watts. A speaker's peak power handling is typically 4 times its continuous power handling. So the speaker can probably handle 1000 watts peak. That means you can use a 1000 watt amplifier to drive that speaker -- as long as you use that power for peaks, and do not drive the speaker continuously with 1000 watts. In other words, don't turn up the amp so high that it clips.


Amplifier Power Low Side
(30% RMS Power)
0.30 x (# of Speakers x RMS Power Rating = Required Amplifier Power)

Amplifier Power High Side
(RMS Power)
# of Speakers x RMS Power Rating = Required Amplifier Power

EXCELLENT LINK, ONE OF THE CLEAREST BEST THINGS I HAVE FOUND
http://rftech.custhelp.com/app/answers/detail/a_id/24/~/determining-power-needed-for-speakers

# of Speakers Each Speaker Rating (RMS) Total Speaker Rating (RMS) Recommended Amplifier Power (RMS)
1 100 watts 100 watts 30-100 watts
2 100 watts 200 watts 60-200 watts
3 100 watts 300 watts 90-300 watts
4 100 watts 400 watts 120-400 watts


https://www.sweetwater.com/insync/power-amp-buying-guide/

"Do I need a 200 watt amplifier to drive a 200 watt speaker?" the answer is simply "no".
A 200 watt RMS power rating is how much power a speaker can handle, not how much it requires.


Even a 200 watt speaker can sound great with only 30% (60 watts) power applied. However, you'll have low SPL (sound pressure level) or "loudness" with this little power.

The speakers should be rated for the same or MORE power than the amp, otherwise you risk overdriving them which can easily damage them.


https://www.quora.com/They-say-you-should-have-an-amplifier-twice-as-powerful-as-your-speakers-is-this-its-minimum-wattage-requirements-of-your-speaker-or-its-maximum






Total power (both channels combined) https://www.crownaudio.com/how-much-amplifier-power
CROWN AMPS and there are other brand names, this is just to give a scope of WATTS AVAILABLE

25-50 W: D-45

50-100 W: 180A, 180MA, D-75A

100-200 W: 280A, 280MA, CP660

200-400 W: 1160A, 1160MA, CP660, CTs 600, XLS 202

400-800 W: CE 1000, CE 2000, CH1, CL1, CTs 600, CTs 1200, K1, MA-602, MA-1202, SR II, XLS 202, XLS 402, XLS 602

800-1,000 W: CE 1000, CE 2000, CH1, CH2, CL2, CTs 4200, K1, MA-1202, SR II, XLS 402, XLS 602, Xs500, Xs700

1,000-1,500 W: CE 1000, CE 2000TX, CE 4000, CH2, CH4, CL1, CL2, CL4, CTs 1200, CTs 2000, CTs 3000, CTs 4200, CTs 8200, K1, K2, MA-1202, MA-2402, SR II, XLS 402, XLS 602, Xs500, Xs700, Xs900, Xs1200

1,500-5,000 W: CE 4000, CH4, CL2, CL4, CTs 2000, CTs 3000, CTs 8200, I-T4000, I-T6000, K2, MA-3600VZ, MA-5002VZ, SR I, XLS 602, Xs700, Xs900, Xs1200

4,000-8,000 W: I-T6000, I-T8000, MA-5002VZ

/////////////////////////
People also ask
What is an acceptable level of noise?
Permitted noise levels


The permitted noise level using A-weighted decibels (the unit environmental noise is usually measured in) is: 34 dBA (decibels adjusted) if the underlying level of noise is no more than 24 dBA.Apr 7, 2015
Noise nuisances: how councils deal with complaints - GOV.UK

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above 60 dB may be annoying, 80-85 very annoyed, 80-85 damage to ears after 2 hours exposure Sound is measured in decibels (dB). A whisper is about 30 dB, normal conversation is about 60 dB, and a motorcycle engine running is about 95 dB. Noise above 70 dB over a prolonged period of time may start to damage your hearing. Loud noise above 120 dB can cause immediate harm to your ears.
https://www.cdc.gov/nceh/hearing_loss/what_noises_cause_hearing_loss.html
What Noises Cause Hearing Loss? | NCEH | CDC

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https://www.sweetwater.com/insync/how-loud-should-you-mix/
Frequencies sound the flattest at around 85dB, and that’s where many engineers like to work. But keep in mind, that number pertains to larger, professional mix rooms. If you’re working in a small bedroom studio on nearfields, 85dB can seem pretty loud. A lot of us here at Sweetwater calibrate our studios to as low as 70dB to accommodate our smaller recording spaces. A good rule of thumb is that your volume level should be low enough to allow for conversation without raising your voice. If you need to shout to be heard, your monitors are too loud.

/////////////////////////

Hertz or Hz = cycles per second or = cps


SOUND RANGE
https://en.wikipedia.org/wiki/Sound

20 Hz and 20 kHz = human ear

https://en.wikipedia.org/wiki/Musical_acoustics#Pitch_ranges_of_musical_instruments

many instruments are in the 70 hz to 4400 hz range
except for bass instruments need lower: French Horn, Trombone, Tuba
If you can live without the top notes of the violin & piano & piccolo, you can max at 2k, but the bulk of the music is just around that. You can have some speaker ranges 30 to 2kHz and another set at 70 to 5kHz or higher. Put different frequency speakers in parallel, not in series, they must be identical to be in series
https://en.wikipedia.org/wiki/Template:Vocal_and_instrumental_pitch_ranges

BASS GUITAR lowest note? 40hz to 400hz range (350Hz)
about 41Hz, but if you tune down a whole step? 36Hz
The Low E on a Bass Guitar is 41Hz, so with this Piano freq chart, look up 41 on the right, then you can look up any other notes above or below for different types of basses, for the exact frequency required https://en.wikipedia.org/wiki/Piano_key_frequencies
The open low E on a bass is about 41Hz, and a low B string sounds around 30Hz, so we may give speakers "that start at 60Hz a dirty look". However, when a mic or speaker shows frequency response specifications, it does not mean that the the device does not pick up or reproduce frequencies beyond the frequency spectrum quoted. it might, then again, it might not, I would rather go for the guarantee



I am fairly certain you can put speakers with different frequency ranges in parallel (not in series, speakers must be identical to be in series)

I am still researching:
WHAT IS THE FREQUENCY OF THE LOWEST BASS DRUM NOTE ELECTRONIC DRUMS? various brands might have various different frequencies.
Speaker Wire Size and Length, will make updates


TEST YOUR SPEAKERS: your headphones should score better than my computer speakers; but you can also hear the high notes above 5k
https://www.youtube.com/watch/PAsMlDptjx8

TEST SPECIFIC BASS RANGE
https://www.youtube.com/watch?v=Su-pYZYAljM



USSPEAKER.com has a wide range of brand and many common types of speakers as well as many special items. I saw one speaker which was 30Hz to around 5000Hz, excellent for Keyboards who need a wide frequency range. The most Common Rock Speakers are from Eminence and Celestion, and the the long time JBL and Jensen, etc etc...... SPEAKERS AVAILABLE AT SWEETWATER MUSIC online, GUITAR CENTER, SAM ASH, MUSICIANS FRIEND would all be able to help you.
https://usspeaker.com/homepage.htm
LEGEND BP1525 is a good one, I will post more later

HOWEVER, WITH MANY MODERN PEDALS, YOU CAN CUT THAT IN HALF TO 20 HZ (hard to find) but you need coverage to at least 41 and lets say 38? 38 hz

CONCLUSIONS: full coverage 40 cps to 4400 or better 20 to 5000 or higher You can hear 8 k overtones

or EXCELLENT QUALITY 20 CPS TO 8K or higher??? 10K? higher?



https://en.wikipedia.org/wiki/List_of_unexplained_sounds


///////////////////////// GUITAR, AMP, SPEAKERS, MIXER = 430 WATTS
When I first started writing this, I was unaware of the extra speaker wattage preferred, so some of these SPEAKER to AMP matches might have to be redone, considering "peak power handling is typically 4 times its continuous power handling"

QTY 4 will provide 300 W per channel
Eminence Swamp Thang 12" 150-watt 16-ohm Replacement Speaker,
Put two 16 ohm speakers in PARALLEL per channel, run it at 8 ohms
(but you can Not use 8 ohm speakers parallel and run it at 4 ohms, as you would need 350 W of speakers per channel at 4 ohms, but at 8 ohm (two 16 ohms in parallel per side) is 300 W per side and the amp provide 215 W per side at 8 ohms, safe)
but as Resistance goes up, Power goes up.
150-watt, 16-ohm, 12" Guitar Speaker 150W
70Hz-5kHz NOT A BASS SPEAKER
11.1 lbs.
https://www.sweetwater.com/store/detail/SwampThang16--eminence-swamp-thang-12-inch-150-watt-16-ohm-replacement-speaker

$109.99 x 4 = you need 4 as the total Watts per channel must exceed the amps capabilities else you might blow out a speaker
https://www.sweetwater.com/store/detail/XLS1002--crown-xls-1002-power-amplifier


Number of Channels: 2
Power Class: Class D (Class D is newer and better than Class AB etc)
Watts/Side @ 8 ohms: 215W
Watts/Side @ 4 ohms: 350W
Watts/Side @ 2 ohms: 550W
Watts Bridged: 1100W @ 4 ohms, 700W @ 8 ohms
$349.00


MIXER: To Interface between the Instrument/Mic and the Amp $79
https://www.sweetwater.com/store/detail/Q802USB--behringer-xenyx-q802usb-mixer-with-usb

AMP: 215 Watts per channel stereo for 430 Watts total
$439.96 = $109.99 x 4 speakers
$079.00 small mixer
$349.00 Crown Amp
$867.98 sub total

$139.00 Epiphone Les Paul SL Electric Guitar - Sunset Yellow
https://www.sweetwater.com/store/detail/ENOLSYCH--epiphone-les-paul-sl-sunset-yellow
$99.00 Electro-Harmonix Ram's Head Big Muff Pi Fuzz Pedal
https://www.sweetwater.com/store/detail/RHBigMuff--electro-harmonix-rams-head-big-muff-pi-fuzz-pedal

For $1105.96 GRAND TOTAL +TAX & SHIPPING You can be KING





/////////////////////////


https://en.wikipedia.org/wiki/Audio_frequency

https://en.wikipedia.org/wiki/Loudspeaker

https://en.wikipedia.org/wiki/Audio_power

https://en.wikipedia.org/wiki/Headphones
The International Telecommunication Union recently published "Guidelines for safe listening devices/systems" recommended that sound exposure not exceed 80 decibels, A-weighted dB(A) for a maximum of 40 hours per week.[36] The European Union have also set a similar limit for users of personal listening devices (80 dB(A) for no more than 40 hours per week) and for each additional increase of 3-dB in sound exposure, the duration should be cut in half (83 dB(A) for no more than 20 hours, 86 dB(A) for 10 hours per week, 89 dB(A) for 5 hours per week and so on.





SOUND PROOFING MATERIALS hands down "Acoustic tile (ceiling)" and its CHEAP
https://en.wikipedia.org/wiki/Absorption_(acoustics)#Absorption_coefficients_of_common_materials
You can cover the walls with 4 ft panels, cheap.


https://en.wikipedia.org/wiki/Soundproofing

SOUND TERMS terminology https://en.wikipedia.org/wiki/Audio_system_measurements

https://en.wikipedia.org/wiki/High_fidelity