2. amps-preamps
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Class D is just Dandy!

I thought it was time we had a pro- Class D thread. There's plenty of threads about comparisons, or detractors of Class D.

That's fine, you don't have to like Class D amps, and if you don't please go participate on one of those threads.

For those of us who are very happy and excited about having musical, capable amps that we can afford to keep on 24/7 and don't require large spaces to put them in, this thread is for you.

Please share your experiences with class D amps!
erik_squires
h2oaudio
38 posts
 
Kenny,

Unfortunately, I am not very well equipped with instruments to perform such tasks.

Henry
h2oaudio
38 posts
 
Erik,

Just to add a bit about the Scintillas. Sure, they are closer to a short over the entire audio frequency spectrum than any other speakers to date. It is not that hard to design a conventional linear class A amp to deal with that which I have done. But what compounding to the low impedance problem is their efficiency, and if I remember correctly, Stereophile’s measurement came up with was in the mid 70 dB or so. And Here is where it is an equally challenging task to deliver substantial power into such low impedance and inefficient load.

Henry
doctor_lipp
13 posts
 
Henry

It is very rare to find a Scintillas owner.  Are you located in Texas?

Former owner I'm afraid.  Parted with them many years ago - the original owner wanted them back.  Today I have a system based on the BG72 ribbon and 6 Carver hex cone woofers, and I just finished restoring a set of Carver Amazing Platinums with NOS ribbons and new woofers.  

- John

P.S.  Yes, I'm in Texas, the DFW area.
doctor_lipp
13 posts
 
Kenny
Unfortunately, I am not very well equipped with instruments to perform such tasks.

Do you have a computer / laptop with audio out?  Then all you need is REW (Room Equalization Wizard) which is free and a mic.  You can get a USB mic with a reference curve here for a very reasonable price.
http://cross-spectrum.com/measurement/calibrated_umik.html

- John
erik_squires OP
15,797 posts
 
Hi @h2oaudio

Oh, agreed. In many cases a top octave roll-off may be much better sounding than a flat amp.

Also room dependent.

Best,


E
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