johnsonwu
Responses from johnsonwu
| Review: JM Labs Diva Utopia Be Speaker You should not be hearing a tonal shift towards the highs unless there's an issue with wiring the resistor. Have you also checked the outer foil/inner foil orientation of the VCap?Also try not to use electrical tape, use heat shrink tubes or nylo... | |
| Hard Audio - Ceramic Speakers The old accuton midrange C90-6-079 used in a lot of commercial offerings sure conveys a cold and dry sound especially when playing violins. The newer C90-6-724 delivers a marked improvement right out of the box. Requires a slight attenuation if ... | |
| Y No YG ? I'm fortunate enough to own both the YG Hailey and Avalon Eidolon Diamond and I swap between the 2. IMO both speakers belong to the "modern" "cool" school of sound. The YGs sound like electrostats when playing easy programs at moderate volumes, ... | |
| Review: JM Labs Diva Utopia Be Speaker If you don't do the woofer inductor mod then stick with 180uf unless you hear a midbass suckout in that case the subwoofer doesn't cross well in the room and you will need to get the midbass to play lower by using a 220uf. The 440uf lytic, ok to p... | |
| Martin Logan Tweaks / Upgrades Open the box and trash the junk crossover parts and use reasonable audio grade substitutes. An inductor, a resistor, and 2 caps are what you need. | |
| High Quality bi-amp-able full range speakers - choices? Hi Aigenga,The EOS uses an Accuton ceramic tweeter that sounds very dry.Pop it open and replace the coupling cap with a Jensen copper foil or VCap oil to tame it and replace the attenuating resistor with a Mills Non-inductive wirewound. You willb... | |
| High Quality bi-amp-able full range speakers - choices? Just recap the EOS tweeter to neutralize that cool ceramic sound and be happy. It will be hard to find a pair of speakers that images as well as the EOS | |
| Counterpoint - Alta Vista - Mike Elliott I have the schematics and I have serviced no less than 5 of them.Most of them have failures like popping caps, rustling plate resistors, blown rectifier 6CA4 and blown Zeners.Why would anyone take out 3 valves? I assume they are the 12AX7 error a... | |
| Considering switching from Audio Research to PrimaLuna, troube with VS115 amp Resistor blowing due to a runaway tube (age or mfg defect) is a common problem. Unless you have VAC phis that have thermal tube sentry circuit you will always run into it. Nothing wrong with audio Research. Just ignore what most people say and rep... | |
| How much does tube brand REALLY affect sound in terms of rectifier tubes? Bigkidz if your preamp has a regulator after the rectifier then changing the rectifier won’t change much. If it’s a classic design LCRC filtered then I would expect you to easily be able to hear it. Also I think getting slightly different tubes e.... | |
| 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... |