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sparkos labs

  1. EddNog

    Completely Blown Away--Geshelli JNOG3 with SparkoS Dual SS2950 Op-amps

    SparkoS had a 30% off holiday discount on everything, so I couldn’t resist picking up a pair of their dual SS2590 op-amps with DIP-8 adapters (fully assembled since I’m lazy). With those op-amps on hand, I knew I just had to go to Geshelli’s web site and order up a lovely JNOG3 DAC in charcoal...
    • EddNog
    • Thread
    • geshelli jnog3 sparkos labs ss2590
    • Replies: 38
    • Forum: DACs
  2. M

    2275 Sparkos Upgrade

    I have two 2275's I'm refurbishing. In the first unit, replaced all electro-lytics on the power supply, pre-amp tone board and both amp boards, along with the standard replacement transistors on those boards. Also installed the Sparkos amp upgrade on the tone board. Everything works and...
  3. M

    2275 Preamp Gain

    Recently rebuilt a 2275 and unit is working and sounding great. Started on a 2250B and noticed that unit sounds louder in all modes (FM, AUX and Phono). I used the 2275 preamp into 2250 mains and the lower level sound was present. Reversed the wiring, 2250B preamp into 2275 mains and the 2275...
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