johnsonwu
Responses from johnsonwu
| Any experience with Vac PHI200 power amp Very interesting to hear Rhljazz's perspective.I was comparing the VAC Vintage 100 monos withBAT VK60, VT130, Classic 150 (owned them all at the same time) They were all driven my AR Reference 1.Then its my Phi 70s, compared against all sorts of C... | |
| Any experience with Vac PHI200 power amp Probably not an answer you are looking for.Having owned VAC Vintage 100 monos and still own the Phi 70s (since 2005) along with a host of other gear.I have to tell you that there is a "house sound" for VAC,and perhaps thats how Kevin likes to voic... | |
| How much power is too much for a Quad 988? Open the bottom and check the flimsy sand resistor in series with the input, being paralleled by a 220uF lytic.These are the things that would break over time and cause the speakers to distort prematurely, with a domino effect of getting the triac... | |
| VTL ST 150, Audio Research VT 100, mk. II I agree with USBlues's comment. Sideways move.Get a tech to replace the 0.68uF Wondercaps with oil caps and you will get rid of a lot of the misty dull sonic signature. Worry not this mod has nothing to do with the fragile output stage.BTW since i... | |
| Sonic Frontiers - A Score or a Flushing? I briefly owned a pair of Power 3s 11 years ago and all they did was heat up the room.Too bad I didnt know any better at the time to run them as dual power 1s (YES you can pull the tubes and run them at half power) and I didnt dare mod these thing... | |
| Sonic Frontiers - A Score or a Flushing? Awful sounding amp in stock form.Beautiful amp if you know how to convert it to triode.Best of the best workmanship except for a lousy designwhich necessitates sacrificial resistors when a tube starts to runaway (READ: aging 6500C tubes)it will fr... | |
| Need opinion on other tube amps then Jolida to buy Get a used 302B and get someone competent to change out the rectifier diodes, the 1st stage filter caps to Panasonic or Nichicon, 2nd and 3rd stage to Solen or VALAB, then coupling caps to Russian FT-3 0.22uF, then ultimately switch to triode mode... | |
| Focal Utopia monitors: Diablo vs. Micro Be Instead of spending thousands for an speaker change, I suggest you consider a $150-$200 cap upgrade for the tweeters.The stock Solen PPA found inside the Micro Be is a $1.5 cap that's nothing compared to the better ones out there like Jensen, Mund... | |
| Warming up the ARC LS2B Change out the diodes to Hexfreds or Schottkys.Change the coupling caps to something that has oil like Jensens. If you are driving one one power amp of input impedance 100kOhms or higher, disable the FET follower stage.The LS2B is not known for wa... | |
| Review: Sonic Frontiers SFCD-1 CD Player Over the past several years I have collected 2 SF-CD1s and went through numerous laser heads. Whenever they act up, one will not read anything (NO DISC)and the other one reads intermittently and absolutely will not read any copied CD-Rs.A unit wit... | |
| Quad ESL Cap mods Good for you then cos I had to change out Duelunds on my friend's JMLab Micro Utopia in favor of Mills MRA12s. The Duelunds caused a major saturation in the sound when overdriven. | |
| Review: JM Labs Diva Utopia Be Speaker Ahhh Quad ESL63, same circuit as my 989 with 1 less bass panel. I am selling my 989s now so go figure how good I have made the Divas. Look at my listing and you will see what I did to it. | |
| Review: JM Labs Diva Utopia Be Speaker It's not a lot of work.NOthing at all compared to modding a Ming Da MC-2A3 preamp.Just 2 V-Cap OIMPs and 2 Solen 220uF 250Vs.The Solens are hard to install, creative tie-wrapping required due to size. Once figured out the mod for the pair can be d... | |
| Quad ESL Cap mods Hi Terry9, did you end up doubling up the Duelund resistors to match the orig. power rating? My experience with Duelunds are outside of Quad mods but were you able to fine 20W+ Duelunds for the job or was your mod only for the input R and C before... | |
| JM Lab Diva Utopia problem - need help I have a review of Diva Utopia's posted here on Audiogon just now. |