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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
georgehifi's avatar
georgehifi
10,312 posts
 
viber6

ricevs, Back to my question--what specific sonic improvements does 150K input impedance show compared to 38K, using the same resistor brand/materials? Just the facts, your observations, please. Thanks.
Viber as I thought, Ricevs answer to is was his own jibber jabber, with no facts as you asked.
And Ralph’s chime in that wasn’t asked for, (almost seems like an auto technical protection response for ricev) is a coy smoke screen to try to turn things around again with using the word "may introduced" and "tube" (high output impedance) as the active source.

This was the correct thing to say
"Changing the input impedance from 38k to 150k will do absolutely nothing if the "active" source has a "normal low’ish" (say <150ohm) output impedance that will drive both"


Both of these are guys bothers in arms protecting their own interests only, it obvious from a mile away.
ricevs
1,543 posts
 
George's first rule of behavior......must attack them and belittle them....then I will feel better about myself.  Trouble is, it does not work.  It just comes back to you......whatever you put out.  You put out negativity.....that is what you get.....you put out love......and that is what you get.  Pretty simple.

I love you, I love you, I love you.....guess what I get back?  Maybe not from you at this point in time.....but your soul loves the fact that I love and adore you.....it does. You're my baby......kisses and hugs.
atmasphere's avatar
atmasphere
12,088 posts
 
This was the correct thing to say
"Changing the input impedance from 38k to 150k will do absolutely nothing if the "active" source has a "normal low’ish" (say <150ohm) output impedance that will drive both"
This is correct. But many tube preamps have a much higher output impedance; some might be 4,000 Ohms, some are even higher!

IME there's no point going over 150kOhms input impedance on an amp; it will cause it to be more sensitive to the interconnect cable capacitance and for that matter, induced noise in the cable.
georgehifi's avatar
georgehifi
10,312 posts
 




IME there’s no point going over 150kOhms input impedance on an amp; it will cause it to be more sensitive to the interconnect cable capacitance and for that matter, induced noise in the cable.

Go back to what I said 4 days ago
georgehifi 09-11-2021 1:58pm
Changing the input impedance from 38k to 150k will do absolutely nothing if the active source has a "normal low’ish" (say <150ohm) output impedance that will drive both, making the input 150kohm, could very well "only serve" to have higher measured noise in the end.

And willy/nilly changing the input of an amp to something 4x higher "can" create offset and other problems, there was a reason it was 38k to start with.


twoleftears's avatar
twoleftears
5,320 posts
 
@yyz I find it odd that that amount of hiss would be intrinsic to this unit.  I forget where you are with the bleed-through issue, but I have to say that a trip back to the manufacturer seems to be indicated.
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