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georgehifi

Responses from georgehifi

Quantum Science Audio Thread
I purchased a 240:240 isolation transformer on a local audiophile trading site. 750W capacity Yes, I believe this is the first intelligent thing you’ve said, as noise does not jump the gap of an isolation transformer, because primary and seconda... 
Deciding if I like Class D.
My measurements confirm it.Here it is once again snapshot taken directly from the Icepower 1200as2 PDFClearly states that the "red trace" is the "phase shift" measurement of the amp from 20hz to 20khz! And the blue trace is rising output impedance... 
Deciding if I like Class D.
I was not addressing you at all Eric, I’m sure you think your knowitall, but far from itThe real OP knowitall in a PM he sent me, when he started this thread, asked for my opinion, so I gave it to him. As for you Eric, usually you want to start so... 
My first streamer- what spidf cable to use?
My first streamer- what spidf cable to use? For perfect output to input spidf match. You want 75ohm 1.5mt (no less), I found industry top of the line 75ohm Belden Digital cable has been the best for me, with quality BNC connectors or rca done your... 
Experience with good d/s DACs “comparable@ to R2R?
riccitone OP @georgehifi I’ve been looking at Soekris dacs as well! Some typical r2r controversy on those via forums, but those that actually own them say resoundingly positives things. "but those that actually own them say resoundingly positives... 
Deciding if I like Class D.
I’m wondering if perhaps that negates the issue you describe with the phase shift ? Honestly, I’m not sure how that would shake out.No, because that phase shift starts at 1khz all the way out to 20khz, with increasing distortion. https://ibb.co/3S... 
GaN by GaN Class-D with SMP complete for $940, ready to go just put in a box.
Once again caught out ricevs "I will not ever post again on any thread that George starts......and the reaction is predictable  
Deciding if I like Class D.
knowitall OPIf that’s the case George, then why does the op amps make such a significant difference, and in a positive way? All input buffer opamps on the input of Class-D’s have their own sounds. The Hypex NC500 monoblocks (same as Belcanto Refe... 
Stereophiles 2021 Recommended Components is now on line.
Just to add to the Audio measurement institutions above that I mentioned, is this an extremely thorough one call "Miller Audio Research" (AVTech tab) That do them for HiFi News and HiFi Choice and a few othershttp://www.milleraudioresearch.com/avt... 
Experience with good d/s DACs “comparable@ to R2R?
Experience with good d/s DACs “comparable@ to R2R? but am in the market for a dac upgrade. Something under 1k with a capable output. Most of the better "Discrete R2R" dacs are a bit more than that. Soekris has one at $1299 http://www.soekris.dk/da... 
Deciding if I like Class D.
knowitall OPI purchased a set of Hypex Ncore NC1200 Monoblocks with custom buffer boards, and it came with Sparkos 2590s Opamps as per my request.I was immediately disenchanted, because the amps sounded very dull, and the highs were rolled off con... 
GaN Amp & Speaker Popping Sound At Power On
Peachtree technical support stated that this was a characteristic of GaN technology.” That sounds like a copout statement, of a not well thought out design No popping noise from my LSA Voyager Gan350 amp at system power up or down. Nothing repor... 
Does Expert Music Streamer Outrun CD Player?
willykuo Does Expert Music Streamer Outrun CD Player? Trouble is what they stream to you is mostly the later "compressed" re-issue of albums, not the earlier uncompressed ones. Here’s what I mean, they only made the one album, but it was re-releas... 
Stereophiles 2021 Recommended Components is now on line.
Roger Modjeski never once advertised in Stereophile, yet his RM-200 amplifier has been in the Class A Tube category for twenty years (it’s Fremer’s reference "affordable" tube amp). As too were the Quicksilver Monoblock's of Sam Tellig’sCheers George 
DAC Shootout Starts This Weekend
@georghifi.  I thought I mentioned that the Vu Jade was an R2R.  Definitely a goodsounding unit.No, you only mentioned the cheaper single box was Delta Sigma verdantaudio OP Today I had a visit from Peter and Karl of Vu Jade. The brought ...