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  1. zxc

    PPA no good anymore?

    I haven't been able to listen to headphones regularly for the past six years. Recently I've returned, and wanted to build a PPA v2, only to see the boards are not offered anymore. But then I noticed some very nice PPA's (627/637, built in PSU, par metal case, diamond buffers) offered at...
  2. zxc

    PIMETA BLEW-UP ???

    Ok, I have a pretty much standard pimeta with: 2x637 and 1x627 OpAmps 2xBuffers on L/R, single buffer on Ground. Gain 11 (same R values on Tangent's site) 2xWima 6.8uF 4xElna Cerafines (470uF, 35V) 100 Ohm resistors on outputs (for getting rid of background hiss) Driven with 18 Watt 24V...
  3. zxc

    TREBLE BOOST for PPA, Pimeta, MMM!

    This is my first post. Thanks to all who've worked on Pimeta, PPA and MMM. I have just puilt my first Pimeta and I enjoy it a lot. Than I decided that my Senns really need tone controls. I noticed that I could implement the bass-boost circuit on PPA directly to Pimeta. Then I searched for...
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