georgehifi
Responses from georgehifi
| Marchand pr41 passive preamp I assume it was S/H, they were expensive at $2000usd for the bass model, nice 20kohm switched attenuator inside, I would have preferred it to be a 10kohm one as the output impedance to the poweramp would have be 1/2 the 20kohm one..http://www.marc... | |
| Pass Labs amps questions +1 for the XA200.5’s. Being the XA it will have more classA bias on it compared to the X series, and therefore should sound sweeter. And run hotter, than the X (you pay a little for that extra sweetness)The C4’s are 90db and a fairly easy load, so... | |
| Class D Technology I used the DR-25 and Krell with my Apogees for years before trading for the equally-difficult-to-drive Thiel CS-5i’s. I assume that you had the same seeing you compared them to your friends.Why would I need opinions of "gurus" when I have actual ... | |
| Class D Technology Please let me know if you want, I’ll post in Tech forums for guru’s to respond.Tech advise needed, Apogee Scintilla in 1ohm mode which amp?Krell FPB-600c or is there any Class-D you can recommend to equal the Krell?And yes even any of the ones you... | |
| Class D Technology Can’t "see the forest through the trees" even though they are presented to you.The Apogee’s in 1ohm mode were never meant to be driven with tube amps, especially ones like you mentioned, they needed big s/s amps like Krells, Classe, Mark Levinson,... | |
| Class D Technology I understand your just protecting your JR120 investment, that "if" you had the knowledge you could have built for 1/8th of the price. http://www.usaudiomart.com/details/649188442-icepower-200asc-modules/ And I’ll bet you’ll be the first to sell it... | |
| Class D Technology I believe you won’t find one tech guru here on Audiogon that would recommend a Class-D amp over "big current" linear amps for these kinds of loads, sure they may work, but are you getting the best from them? I think not. 2nd graphhttp://www.lippau... | |
| Class D Technology So it's come down to mud slinging. Not from you sunshine, I think everyone knew I meant megahertz as there's 1,500,000,000 difference between the two.Cheers George | |
| HOLO Audio Spring DAC: Affordable discrete R2R Multibit Dac, could be a winner. Here is another one that I have yet to read. That was posted on SNA Australia.http://www.head-fi.org/products/holo-audio-spring-dac-level-3-kitsune-tuned-edition/reviews/17337 Cheers George | |
| Class D Technology randy-11It sounds like a Class D amp would be best for a sub-woofer, based on a comment aboveIf the new MOSFET designs will be out (as products) soon, I would not want to sink too many $$ into an amp right now...You are correct Randy, really good ... | |
| Class D Technology One of our audiogon friends uses class D amp (H20) with Apogee Scintilla in 1 ohm mode with great results. Then I feel sorry for this person as he has never heard his Scintilla’s at their best. It may work, but at their best?? FAR FROM IT!As they ... | |
| Class D Technology The output filter vs switching noises frequency is the bottleneck for Class-D HF distortion and low impedance drivability.As I said when in the future when it is not a bottle neck, and the switching frequency is much higher, I too will dump the ho... | |
| Class D Technology There are many class A or AB amps that have similar bandwidth but nobody talks about phase shifts.That’s because good ones are usually much faster, and they don’t freak out at low impedances like ClassD does in distortion and loading.I like to see... | |
| Class D Technology The JR 102 uses the Ice 200asc modules as you are probably aware.Look at the distortion figures for the highest their willing to put up in red which is just at 6.5khz. Look how fast the distortion rise is for the given wattage. And this is all at ... | |
| Class D Technology My class D amp has 60kHz -3dB bandwidth. Georgelofi - you must be a bat?What brand model? Maybe I can find some non affiliated bench testsEven so with those figures do some homework at -3db at 60khz you will have phase shifts all the way down to 5... |