georgehifi
Responses from georgehifi
| Are there differing qualities of optical cable? rvpiano My question is, are there different qualities of optical cable you can use, or is one the same as the other? Yes the polished optical glass cable is the best (can’t bend it too much), Wadia had these as an ST type connection with an AT&a... | |
| Schiit Yggdrasil -- 21 bit? I'd love Stereophile to put on their bench a Guarneri vs a Stradivarius. Probably could, if they plugged in.Cheers George | |
| A Tech Question Burr-Brown DSD 1792 DAC chip From memory, this chip is what they made after stopping manufacture of the PCM1704 because of the very high cost of making them, laser trimming the R2R resistors. The 1792 is a bit of a hybrid chip, Multibit and Bitstr... | |
| Schiit Yggdrasil -- 21 bit? Yeah Robert Harley is with Absolute Sound he's the reviewer that got excited about the Yaggy..At least Stereophile try to backup their reviews with measurements and you can draw some kind of parallel between review and measurements (if you can und... | |
| New Yggdrasil - First (and second) Impressions I don't own a Yaggy, but from all reports it is a well done Multibit, and to me should be discernable for the better over an Oppo DS using the same PCM source material, try feeding both a CD from a proper transport, maybe it the download junk that... | |
| Bridge Rectifier for the heater 300b tube amp George... would it be better to custom your own bridge rectifier using 4 diodes? Same, same. Except the bridge has a nice metal plate that can be bolted to the chassis to keep it cool, 4 diodes don't.Cheers George | |
| New Yggdrasil - First (and second) Impressions You can prove it to your self, just listen to the discrete R2R Multibit offerings from the ones I pointed out and compare them to you delta sigma Oppo ESS unit using the same PCM material, if you still can;t hear any difference it's time to thro... | |
| Bridge Rectifier for the heater 300b tube amp Just get 35amp bridges. I had 25amp ones but after 2 years they cracked.Make sure you mount them on the chassis with paste for some heat sinking. http://www.mouser.com/Semiconductors/Discrete-Semiconductors/Diodes-Rectifiers/Bridge-Rectifiers/_/N-... | |
| New Yggdrasil - First (and second) Impressions that can be downloaded freely in lossless format via the Internet I don't do downloads, I find them inferior with every a/b we've done at our audio society meetings, maybe it's the hardware or the downloads themselves?? But it's enough to put m... | |
| Low output gain amplifier for ZU 101db Efficient speakers Some of his amps have very low input impedances. Yes granted, this is the reason why an active pre is needed, if they were >50kohm then a low impedance active pre is not needed, remember the Industry Standard for input impedance was 47kohm or ... | |
| New Yggdrasil - First (and second) Impressions You guys need to listen to the new discrete R2R Multibit flagship converters from the like of Total Dac, MSB and such, converting PCM 24/96 then listen to the same from whatever the best is from ESS. I remember a lengthy PR video by designer and C... | |
| New Yggdrasil - First (and second) Impressions "Some audiophiles claim that reversing the polarities of all the channels simultaneously makes a subtle perceptible difference in the reproduced sound Yes I believe it can, I’ve heard the difference using dynamic speakers especially in the bass, ... | |
| Low output gain amplifier for ZU 101db Efficient speakers He qualified it by saying that his amps sound better with an active preamp. He basically said that it’s an unexplained phenomenon. Of course he did, that’s one of his bread and butter items, he’s not going to shoot himself and his company in the f... | |
| New Yggdrasil - First (and second) Impressions Basically a ladder R2R DAC has poor linearity but low noise and converts PCM natively. The use of basically is correct that haven't been done well, this is why I've always stipulated "well implemented" when saying this, but saying this I'd rat... | |
| Why not batteries instead of power supplies? Jeff Rowland Design Group offer battery powered amplification since early 90's When things were linear and Class-A/B then this could have helped reduce noise ect, but with their new class-D stuff today, batteries can't solve the biggest problem... |