johnsonwu
Responses from johnsonwu
| Review: Audio Research Corporation HD 220 Amplifier Almost a year into ownership I can't find fault with it driving Avalon Diamond and YG Hailey. No noticeable glare or emphasis of mid highs. Sadly these things I guess are not serviceable anymore due to end of life of Thermotraks. I did notice ... | |
| Frequency response to 100k +/_ 1.5db? The funny speaker cables with the mystery network box will have an inductor that suppresses all ultrasonics. They just wont get to the tweeter at all. Whether they sound good in the audible frequencies is a matter of personal taste.I don't disag... | |
| Focal 1037BE; All-Rounders Extraordinaire! The one note flabby bass can be fixed by replacing the under-gauged woofer inductor with a decent one and the electrolytic cap in the same part of the circuit with a film cap. It's not the amount of bass that's the Achilles heel of the Focals. It'... | |
| How long will tubes last in a pre-amp? SF Line 1 uses full filament power but a very low B+ so the tubes will be running without cathode stripping. It is designed to have the tubes warm without being at the expense of tube longevity. | |
| Review: Audio Research Corporation HD 220 Amplifier Discontinued after thermotraks are EOLed. I managed to try out a unit that has been refurbed by audio research. Not forward an lean sonic signature at all compared to all the terrible sounding ones I've owned such as VT200. Will update after the... | |
| Audio Research D70 mark1 + schematic TIP41 likely shorted out.Collector should be about 340 and the output to the B+ for the 6922 should be 304V ( in the D115)The D70 and D115 are hard to troubleshoot. | |
| primaluna gear, avalon eidolon speakers, cardas GLai there is indeed something special about the 0.8.Tried them when I had my old pair of Eidolons.Too bad I cant afford it, improvement doesnt justify the cost.Rather spend time tweaking the operating points of my electronics.Finally tamed my Ava... | |
| primaluna gear, avalon eidolon speakers, cardas Still using Cardas, per my Eidolon and Eidolon Diamond.I don't believe in wires at all....well that's an overstatement, I play with wires in moderation.Start with a baseline of Canare Starquad cheapies,if the system doesn't sound good and you abso... | |
| primaluna gear, avalon eidolon speakers, cardas The primaluna gear is outclassed by your speakers and cables.Consider a preamp with some voltage regulation, and a power amp with some gain stage regulation. Regulation is conducive to warmth and sound stage stability.The Chinese "classic" designs... | |
| MFA luminescence C Preamp There are schematics for the A2 floating around the Internet if you look hard enough.....actually found it... check email. | |
| Review: JM Labs Diva Utopia Be Speaker Hi Jazzao1, The coupling caps for the tweeter is a good start which will get you 70% of the way.Getting the lytic replaced with a Solen AXON 250V 180uF bypassed with a 2uF Mundorf silver oil will get you to 100% of where the mids and highs should ... | |
| Computer audio, I am not convinced yet ...... Try HQPlayer on the PC. Free trial. | |
| Review: Tube Research Labs Dude Tube preamp Does Paul still wire the volume pot to the output side? If so that might be the secret to why .22 works. | |
| Review: Tube Research Labs Dude Tube preamp Hmmm I recall seeing white Mundorf M-caps.0.22 sounds a tad low for the plate-driven 6SN7 outputs.Do you have a set of main output caps at a few uF in value? | |
| Review: Tube Research Labs Dude Tube preamp I recall the first Dudes have 47uF Mundorf white MCaps as output caps. What are you using now? |