Class D Technology

randy-11
It sounds like a Class D amp would be best for a sub-woofer, based on a comment above
If the new MOSFET designs will be out (as products) soon, I would not want to sink too many $$ into an amp right now...

You are correct Randy, really good for bass
Technics have lead the way and developed a very expensive one
http://www.technics.com/us/products/r1/se-r1.html
with double the switching frequency as it is today @ 1.5mhz. This is a step in the right direction, but it really needs to get to around 5mhz before the right effective filtering can be done, and then able to get rid of todays Achilles heel that Class-D has.

So just go the cheaper not so glitzy ClassD’s if you want to dabble in it, or even do your own clone if you or a friend are able, and purchase the Icepower/Hypex?etc modules and the power supply modules they sell. They are very much a pluggable build to do, hardly maybe no soldering to do.


Cheers George

Before you offer your "expertise" get things right  - mhz is millihertz, proper unit is MHz (megahertz).  Keep posting - you might learn something one day.

"One of our audiogon friends uses class D amp (H20) with Apogee Scintilla in 1 ohm mode with great results."

georgelofi:

"Then I feel sorry for this person as he has never heard his Scintilla’s at their best. It may work, but at their best?? FAR FROM IT!"

Hi George,

My good friend Glen, a BIG tube fan, has the best sounding Apogee-based system I have heard (and that is more than a few). Had the Carver K-120 monos, then Kronzilla Mark II monos, and now living very happily with two H20 Class D stereo amps from Henry Ho running bi-amped into his Scintillas.

Proof is in the hearing and not found in blanket statements unfairly encompassing hundreds of products with one fell stroke. Glen’s Kronzillas are for sale if you are interested.

Best to you George,
Dave

So it's come down to mud slinging. 
Not from you sunshine, I think everyone knew I meant megahertz as there's 1,500,000,000 difference between the two.

Cheers George  

I believe you won’t find one tech guru here on Audiogon that would recommend a Class-D amp over "big current" linear amps for these kinds of loads, sure they may work, but are you getting the best from them? I think not. 2nd graph
http://www.lippaudio.org/old/MySystems/Scintilla/impedance.html

BTW: Carver 120 and Kronzilla Mark II are NOT big current amps, sure they consume big current, but they won’t push it into speakers load like these Appogee’s

Cheers George