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Post subject: mustang lll loudest of all the mustangs?
Posted: Thu Mar 17, 2011 5:43 pm
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Is the mustang 3 the loudest of the mustangs since it has 100 watts to one speaker and the other two have 75 watts per channel.


Last edited by bertosknives on Thu Mar 17, 2011 8:43 pm, edited 1 time in total.

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Post subject: Re: mustang lll vs the lv and v
Posted: Thu Mar 17, 2011 7:01 pm
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75 x 2 = 150W


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Post subject: Re: mustang lll loudest of all the mustangs?
Posted: Thu Mar 17, 2011 8:16 pm
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so 75 watts per speaker I was reading it doesnt matter how many speakers you have for exaple 100 speakers at 1.5 watts each is 150 watts.


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Post subject: Re: mustang lll loudest of all the mustangs?
Posted: Fri Mar 18, 2011 2:04 am
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You might be on to something here.

A while ago I installed 4 ceiling speakers in my kitchen from my hifi running from 2 amplifiers at 90 watts per channel, so 4 X 90 = 360 watts. Now I can run them either just two or all four. When I run all 4 there is absolutely no increase in volume over the 2 just a better spread of sound.

I queried this on a well known hifi forum and they said there would be no increase in volume, and gave me a reason for this which to be honest I didn't understand.

Play the III & IV side by side and trust your ears.

Just my 2p worth.


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Post subject: Re: mustang lll loudest of all the mustangs?
Posted: Fri Mar 18, 2011 8:48 am
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I have the mustang 5 half stack and the just got a mustang 3 I cranked them both up and could not tell a difference in volume so I will be bringing back the half stack.


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Post subject: Re: mustang lll loudest of all the mustangs?
Posted: Fri Mar 18, 2011 12:13 pm
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bertosknives wrote:
Is the mustang 3 the loudest of the mustangs since it has 100 watts to one speaker and the other two have 75 watts per channel.



Short answer = yes

Long answer: =
Here is my take on all this. . . . . "Loudness" is a subjective measurement. We hear with our ears (actually our ear drums) and some have better hearing than others. What can be measured is SPL (sound pressure level) this is expressed in "db".

Also, higher wattage does not in and of itself equate to SPLs (loudness if you will). What does make a huge difference as it relates to wattage is "headroom". This is to say that turning a 30 watt amp to 10 will start to distort the power amp (good distortion). Turning a 100 watt amp up to 10 will be mostly to completely "clean" all things being equal.

Many "session" players will use a low watt amp ( 5 to 20 watts) in the studio because they can get the OD at much lower SPLs. When they go to the "big stage" they will bring out the big watt amps because they need the "volume" and can handle the high SPLs while getting the OD.

Also, it takes a large increase in Wattage to make a very small difference in the actual volume. I forget the ratio but it's something like 1 db increase for evdery 10 watts.

This is why a Fender Twin will have 4 6L6 power tubes (lots of headroom) and a Fender Champ will have one.

As a side note: 75 watt Solid state amp is a lower in SPLs than a 75 watt all tube amp.

Hope that helps. Bo


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Post subject: Re: mustang lll loudest of all the mustangs?
Posted: Fri Mar 18, 2011 12:34 pm
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It's +3dB for every doubling of wattage. In other words, a 20 watt amp is 3dB louder than a 10 watt amp, all other things being equal. Same with a 200 watt amp vs. a 100 watt amp (only 3dB louder)

A tube amp seems louder because of the way it clips/distorts when pushed hard. Similar to analog TV vs. digital TV...a weak analog signal (think tube amp) gives a somewhat distorted, but usable signal, whereas a digital TV (think solid state) gives a great picture with enough signal, but none with too little.


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Post subject: Re: mustang lll loudest of all the mustangs?
Posted: Fri Mar 18, 2011 1:58 pm
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Tube amps have big unrestrained transients, or volume spikes, which allow a much higher perceived volume, even though those transients move into distortion.

SS amps don't allow transients above a certain hard ceiling--otherwise you'd go into ugly digital clipping--so for the same wattage they are perceived to be noticeably quieter. The entire signal dynamic must be lowered per-wattage to compensate for that hard ceiling.

My estimate is my Mustang III at 100 watts is roughly equivalent to a Blues Deluxe at 40 tube watts, or at most an HRD at 60 tube watts.

Loudness is of course a function of where your ear is. If it's right in front of a speaker, maybe the watts-per-speaker thing makes sense. But if you're measuring SPL in a room, that room is being fed any and all sources including the second speaker in the IV, thus ramping up the SPL commensurate with 150 watts. It's cumulative.


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