Recent content by johnsonlwu

  1. J

    Time and Phase aligned

    They are time and phase aligned but I have seen 2 samples, my eidolon Diamond included, where the midrange is not connected right. With 12 dB per octave 2nd order crossover the mid should be reversed relative to the woofer (there is a 1.5V DC battery test you can easily do) but they were wired...
  2. J

    Counterpoint NP220s

    There are several NPS200s in the market you might want to look into. They aren’t worth much so you may consider replacement vs fixing. I can certainly help you diagnose the problem, its likely a loose wire or bad cap somewhere. I m in Sunnyvale. don’t want to do upgrades cos there’s a world...
  3. J

    A New Wave of Class D Integrated Amplifiers

    picked up an SU-R1000 from Japan and hauled it back home to CA yesterday. Exchange rate too attractive to pass. First impressions is it’s a very midrange warmth and clarity focused amp. Absolutely no overshoot and you don’t have to crank it up to enjoy music. My other gear include many...
  4. J

    Counterpoint NP220s

    a means North America that’s it If it has a few round transistors right next to the 6922 then it’s stick if those are removed and you see some black Mills MRA12 27knor 33k resistors that’s upgraded. i have serviced over 10 NPS series and owned and still own 2 NpS400 and 2 nps200 and I’ve never...
  5. J

    Counterpoint NP220s

    Seems like there are more NP220s in the used market recently. Most of them badly molested by “techs” who think they know what they’re doing and end up blowing every fuse every transistor and frying traces on the motherboard. Here’s an example of one that a friend bought as parts and landed on...
  6. J

    Laufer Teknik Memory Player 64

    Is the Laufer still a competent player in todays terms? A dear friend who passed recently left a unit supposedly is "32 Core player with Onboard Dac rca/xlr outputs, along with aes/ebu, spdif and usb outs. It has most of [the] current power supplies and a windows 10 OS." Is there any...
  7. J

    Counterpoint NP220s

    Recently got 2 parts amps in their respective sorry state SA220 and NP220. The NP220 required pretty much a total rebuild. After hours and hours replacing broken parts, putting in missing parts, and repairing broken traces it's happily singing again!
  8. J

    SA-9 Transformer Replacement

    For the SA9 try contacting Dai Pham "dailytrade14" on ebay. He was the original lead tech for Counterpoint and Altavista. I am familiar with the SA9 and have repaired 2 myself but sourcing a different transformer that would fit the PS chassis is tough. Here are the specs. Are you SURE its...
  9. J

    Counterpoint NP220s

    I take it your NP220 uses 6SN7 (not 6SL7) tubes? If so the gain is a mere 18dB and you need "old school" high gain preamps like Audio Research SP10 or MFA Lumi to wake it up otherwise it does sound sleepy. Also the design lacks NFB so bass control is expected to be a bit flabby.
  10. J

    Counterpoint NP220s

    If you happen to be in NorCal I can certainly help. I own many and have fixed many Counterpoint NPs.
  11. J

    How to contact Avalon Acoustics for support?

    $1000 is highway robbery, those silicone pads can be had for USD 1.50 Its not just me who is using this trick: http://www.xtremeplace.com/yabbse/index.php?topic=54488.2355 Cleaning up the mess requires a lot of patience. Use small spatulas and disposable chopsticks. EAR tubes will get you...
  12. J

    How to contact Avalon Acoustics for support?

    If you have a Daiso Japan shop close to you then you can buy soft transparent 2" x 2" silicone squares of the same texture and improvise from there. Scrape the oozing black goo away as much as you can from behind the woofer. Wipe with disposable cloth (not paper) the goo inside the bass port...
  13. J

    Counterpoint NP220s

  14. J

    Counterpoint NP220s

    STOP RIGHT THERE he likely DOESNT know what he's doing. I have HAD IT with those who claim to know how to service Counterpoint. There is a combination of BIAS and DCO and predriver balance which requires 3 multimeters probing 3 things to adjust. He likely over-compensated the DCO pot causing...
  15. J

    Counterpoint NP220s

    Hi Marco, it's the ripple current tolerance and ESR that counts. Anything over 20000uF per phase will give you plenty oomph. I like the Nichicons (they are used in my Premium Golds), and I have used EPCOS/TDK with good results on NP100 upgrades. The woofers should never rumble when in standy...
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