Last post then
As i said its an off the shelf generic motor design they use. Nothing special and not optomised.
The amp, sorry i misunderstood you when you said two amps in one case when people normally say that they meen two mono amps in one case.
An Amplifiers 'sound', Its probably not a good idea to get me started on that one i don't have time for the argument that im sure this will start.
and you seem to not have grasp what i have said so far and this is alot more indepth.
Amplifiers are an electronic device. The human hearing system is not that acurate to distinguise between very small differences listening to music when an amplifier is used in its linear range. Yes you can measure component differences on the bench but can the human ear/brain hear them with music? from the scientific data I used to have to work from and read about not until certain high levels of difference are achieved because of the ear brain system is not that accurate!. But thats a
large can of worms topic in the audio world because everyones been blinded by marketing.
I can hear the responces now
In electronics we think of an amplifier as a linear system so unless one of the following is different or not within known human brain/ear tolerances as a designer you can ignore any difference as the end user will not hear one when the amplifier is used below clipping in its linear range playing music. Linear system theory dictates that the following,
Gain, Power, Frequency responce(magnitude and phase), noise, input and output impedance, distortion, chanell seperation dictate the sound of an amplifer device. If these measure the same within certain human ear/brain tolerances the two devices will sound the same playing music.
Some of the tolerances i remember off the top of my head are channel seperation greater than 30dB from 20Hz-20kHz. (don't know an amp that does not do this). Noise (noise floor, on/off pops due to dc offset etc), Gain (channels matched within +-0.05dB), Distortion (2% THD 20hz-20Khz (with music))
So your probably shouting at the screen now saying you hear a difference right?[/ Let me tell you why. One of the criteria for a linear system is different between the two amps you have tried.
You can either hear a level change/a power change (most likley cause is as 0.25dB makes people think that one sounds better(oldest trick in the book
)
It might have a different frequency responce. (bass boost etc). FR can tamed with a good eq.
Noise floor (hiss) on/off pops etc.
Gain. It may have more gain on one channel than another or a channel phase inverted, were the other amp does not.
Power it may have more power below clipping/distortion.
Input and output impedance is effecting the amps output frequency responce (its what tube amps do
)
Best way to think about it is why do amplifier manufactueres only test certain criteria at the end of a production line
were as audiophiles say this and that make a difference? Marketing men often dictate to designers what parts they want using because they have a certain following, a certain brand of wire, certain brand opamps, etc not because theres actually a engineering reason for them but because it helps the marketing men sell!
Better reasons to buy one brand over another is Build quality, aftersales service, resale value, image(the type the brand gives you not the audio kind
), reliability.
Anyway i hear EVERYONE now screeming at there screen saying im an idiot and know nothing.
I should now really stop before i get linched
