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LSA Voyager GAN Amplifier

Just got mine last week.  After 24 hours of play all I can say is that this is not your father's class D amplifier.  There is not one thing about its sound that reminds me of the class D gremlins that I do not like.  The low end filled in and now has deep impact, the midrange is the love child of a beautiful tube and clean hybrid amp - just gorgeous.  Highs are very clean and extended. Spatial cues are top notch. My system has had some damn good tube and solid state amps in it before and it has never sounded this good.  I am blown away with the quality of sound coming from class D amplification at this price point.

This 300 wpc amplifier is a real winner.....
jaymark
tweak1
3,736 posts
 
Having owned both tube and SS, the thing I recall about tubes is they are more holographic, lighting the music from within. As Ive mentioned, my room is volumetrically large, so for me to get a proper spl I need big tube amps which, unfortunately in S FL are heaters, as are large AB & class A amps (I loved my Kinergetics KBA 75 which (as I recall) was 75 w pure class A.


Among the many things I'm enjoying with the Voyager over the EVS 1200 is, it can be eerily holographic, when the recording is. I never heard that with the EVS 1200, though I very much enjoyed the amp, at least until the V arrived

hth
snapsc
687 posts
 
It's obviously not possible for everyone to know everything about every amplifier out there. 

You may note in the attached article (from 2017) that Tommy Obrien (Digital Amplifier Company) talks about building his class d amplifiers with discrete parts, not modules, minimal feeback...and Our Cherry Amplifiers use both clocked and "continuous time" digital circuits with a variable switching frequency (up to 2 MHz), allowing audio bandwidth over 100kHz.

http://https//positive-feedback.com/interviews/tommy-obrien-digital-amplifier-co/



atmasphere's avatar
atmasphere
12,175 posts
 
Our Cherry Amplifiers use both clocked and "continuous time" digital circuits with a variable switching frequency (up to 2 MHz), allowing audio bandwidth over 100kHz.
If you're avoiding feedback you'll need that sort of bandwidth to prevent significant phase shift.
georgehifi's avatar
georgehifi
10,312 posts
 
If you’re avoiding feedback you’ll need that sort of bandwidth to prevent significant phase shift.
Like Class-D have with switching frequencies at 600-800khz, like this Icepower has https://ibb.co/5Kj0rcP that has significant feedback, and still has rubbish phase shift measurements(red trace).

Our Cherry Amplifiers with a variable switching frequency (up to 2 MHz), allowing audio bandwidth over 100kHz.


If that is correct, this is what Technics did (with SE-R1) fixed 1.5mhz switching frequency/output-filter to move the phase shift up and out of the audio band in the above graph. And why you can get to 100khz bandwidth without too much roll off (phase shift).
BTW your positive feedback link doesn’t work here it is fixed
https://positive-feedback.com/interviews/tommy-obrien-digital-amplifier-co/
Cheers George
yyzsantabarbara
5,123 posts
 
I really like my CODA 07x preamp but it does not sound like "straight wire with gain" which I think most would appreciate. However, for me I was missing that "straight wire..." on some recordings so I ordered the Benchmark LA4 preamp to add to my office.

I will test the modded Voyager with both preamps but likely focus on the LA4 which will let me hear the Voyager and sources without the preamp adding anything.
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