If you use the digital output of the Bluesound Node, you ARE using it's internal DAC. The only way to not use it is to use the analog outputs, which there are not analog inputs on the Peachtree amp. So the question remains, if I use the digital output of my Lumin streamer into this amp, what device is doing the digital to analog conversion? No DAC needed according to the OP, but I'm having a hard time figuring that one out.
Affordable GaN FET amp from Peachtree Audio
Peachtree Audio is offering a Beta Test program for their new GaN 1 amp (not to be confused with their GaN400) and it's being offered at a substantial discount ($1299 instead of $1999) just for being part of the Beta Test group. It has only one digital coax input and that's it. 200 Watts/channel, zero feedback, and no DAC since the GaN FETs handle that.
All the best,
Nonoise
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daledeee1329 posts Using the Bluesound or DAC for volume control usually leads to bit stripping. Some DAC have a good volume control. I don't remember what kind that is or what brand DAC has these.
All Lumin streamers have LEEDH processing built into the app. It is a very high quality volume control that does not degrade the SQ.
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@barts , It’s over my head as well but here’s this from their site:
There’s also this from Twittermachines on the Technics SU-R1000 (which uses GaN FETS:
I read somewhere that Wadia did a similar thing all those years ago but was stymied by the limits of the output devices they had then. It’s still over my head but I can definitely hear the results with my Technics SU-G700. I still prefer going analog in from my SACD player but it’s a close enough call to make me know that a better coax cable can level the playing field, or, maybe not. All the best, |
ralph at atmasphere or others working with these technologies can probably answer better ... ...but to my understanding the class d amps use pulse width modulation of the output transistors... so the input into that form of power transistor control scheme is digitized by nature... so when you put an analog signal into these units, it actually goes through a-to-d conversion initially, so that the amp module is working off a digital signal it needs to its modulation (downstream control) scheme - and then the amplified output is delivered to the output taps (speaker terminals) in analog form, thus playing music amps and integrated amps like those from devialet, lyngdorf et al all work this way - you feed in an analog signal, it converts to digital at the input... then the amplification module converts it back to analog with the juice behind it to drive the speakers... so this peachtree product is simplifying the scheme by taking the digital in only at the spdif rca port... to a-to-d conversion is being done for any inputs https://digilent.com/blog/whats-the-point-of-a-dac-and-why-do-i-care/ https://www.adam-audio.com/en/technology/pwm/ https://www.eetimes.com/class-d-audio-amplifiers-what-why-and-how-part-5/ |
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