Just wondered why I dont sea many topics concerning US Amps for SQ?
There addvertized THD #s (.oo6)seem out of this world compared to others I have seen yet they only seem to hang in the SPL end? Do they not live up to their claim? Just curious

 

they do look pretty intense yet I have heard that their power supplies are not that great that is why the blow up.
Just my two sence. Don't get me wrong they are good yet not great in my opinion.
Get some old school stuff man....
later.

 

I hadnt heard of them blowing-up but...
I was looking at their web-site and they make some serious claims?
Most of the tech stuff I dont understand but at their RMS power the THD #s are the lowest Ive seen Is this just a #s game and they can pick #s out of a hat?
As far as the old school stuff thats all I got. PPI AMs

 

the stuff made in USA is good... their imported line was junk last year, I talked to them at CES and they feel the QC issues of the imported stuff is in the past. Their products made in the USA have been solid for SPL and SQ though they have not been in a lot of SQ competition vehicles.

what does THD have to do with SQ? It is not a metric of interest unless it is over 1%.

 

Ohh
I thought the cleaner the signal the better the sound potential?
As I said I dont realy understand much of this I always thought in order to have good sound you needed good quality reproduction? I have never owned any of the elite higher end stuff to know but when I cruise the different web sites and look at their claims I assume they are all offering info from the same formulas? What I'm saying is if I look at their USA1000 that puts out 150w per channel @ .006THD Is this not a purer/cleaner signal than my PPI 150w per channel @ .02THD. Are you saying if its not above 1.0THD its not a issue and it wont be audible?

 

amplifier distortion is negligable compared to the distortion caused by the induction in the speaker coil, so really, unless it's over 1%, you won't hear it, even at the highest frequencies.

for sub bass, anything below 20% is inaudible.

 

Humm
whaddya know.

The thing that sucks the most is the more I learn the less I understand
Thanks

 

^ X2 what did they do to get low distortion numbers, they initiated negative feedback and that has many good features from a design point of view, but some feel it 'affects the signal'. I have owned several 0 feedback, several low feedback, feed-forward, and high feedback designs and the only thing I have to say is the difference isn't much (if any).

 

^ X2 what did they do to get low distortion numbers, they initiated negative feedback and that has many good features from a design point of view, but some feel it 'affects the signal'. I have owned several 0 feedback, several low feedback, feed-forward, and high feedback designs and the only thing I have to say is the difference isn't much (if any).

 

the number you gotta worry about is how efficient the sub is. a woofer that produces 92 decibles is more effincient than a woofer that produces 89 decibles at 1 watt/1 meter