Monday, July 20, 2026
Home Geshelli J3 Pro DAC with Sparkos and Sbooster mods

Geshelli J3 Pro DAC with Sparkos and Sbooster mods

4

Pros

  • Power supply upgrade well audible
  • Opamp upgrade also well audible
  • Round, romantic sound

Cons

  • Noise via RCA is a bit high
  • In standard form not super nice sound

The test setup

Contents

Geshelli dac test

Reference System

Type test
Single Test
Inputs
  • Digital Coaxial
  • Digital Optical
  • Digital USB
Outputs
  • Analog RCA
  • Analog XLR
Product type
D/A-converter
Max samplingrate
32 kHz
Max bit depth
384 bit
Production country
USA
Type test
Single Test
Accessory type
Power supply
Voltage (tested)
12 Volt
Number of connections
1
Maximum load
  • 36 watt
  • 3 Ampere
Dimensions
    Production country
    USA
    Sound Samples
    Measurements
    XLR - Stock + Sbooster - Jtest
    XLR - Stock + Sbooster - Jtest
    XLR - Stock + Sbooster - Dynamic Range
    XLR - Stock + Sbooster - Dynamic Range
    XLR - Stock + Sbooster - Crosstalk
    XLR - Stock + Sbooster - Crosstalk
    XLR - Stock + Sbooster - 24 bit noise
    XLR - Stock + Sbooster - 24 bit noise
    XLR - Stock + Sbooster - THD - Freq
    XLR - Stock + Sbooster - THD - Freq
    XLR - Stock + Sbooster - response
    XLR - Stock + Sbooster - response
    XLR - Stock + Sbooster - noise -90dB
    XLR - Stock + Sbooster - noise -90dB
    XLR - Stock + Sbooster - noise -0dB
    XLR - Stock + Sbooster - noise -0dB
    XLR - Stock + Sbooster - Noise - Interference
    XLR - Stock + Sbooster - Noise - Interference
    XLR - Stock + Sbooster - Lineairity
    XLR - Stock + Sbooster - Lineairity
    Stock - RCA - THD vs Freq
    Stock - RCA - THD vs Freq
    Stock - RCA - Response
    Stock - RCA - Response
    Stock - RCA - noise -90dB
    Stock - RCA - noise -90dB
    Stock - RCA - Noise 24bit
    Stock - RCA - Noise 24bit
    Stock - RCA - noise -0dB
    Stock - RCA - noise -0dB
    Stock - RCA - noise - interference
    Stock - RCA - noise - interference
    Stock - RCA - Lineairity
    Stock - RCA - Lineairity
    Stock - RCA - Jtest
    Stock - RCA - Jtest
    Stock - RCA - Dynamic Range
    Stock - RCA - Dynamic Range
    Stock - RCA - Crosstalk
    Stock - RCA - Crosstalk
    Stock - RCA - Sbooster - THD vs Freq
    Stock - RCA - Sbooster - THD vs Freq
    Stock - RCA - Sbooster - Response
    Stock - RCA - Sbooster - Response
    Stock - RCA - Sbooster - Noise -90dB
    Stock - RCA - Sbooster - Noise -90dB
    Stock - RCA - Sbooster - Noise 24bit
    Stock - RCA - Sbooster - Noise 24bit
    Stock - RCA - Sbooster - Noise 0dB
    Stock - RCA - Sbooster - Noise 0dB
    Stock - RCA - Sbooster - Noise - Interference
    Stock - RCA - Sbooster - Noise - Interference
    Stock - RCA - Sbooster - Lineairity
    Stock - RCA - Sbooster - Lineairity
    Stock - RCA - Sbooster - Jtest
    Stock - RCA - Sbooster - Jtest
    Stock - RCA - Sbooster - Dynamic Range
    Stock - RCA - Sbooster - Dynamic Range
    Stock - RCA - Sbooster - Crosstalk
    Stock - RCA - Sbooster - Crosstalk
    Sparkos - RCA -Switchmode - THD vs Freq
    Sparkos - RCA -Switchmode - THD vs Freq
    Sparkos - RCA -Switchmode - Response
    Sparkos - RCA -Switchmode - Response
    Sparkos - RCA - Switchmode - noise -90dB
    Sparkos - RCA - Switchmode - noise -90dB
    Sparkos - RCA - Switchmode - noise 24bit
    Sparkos - RCA - Switchmode - noise 24bit
    Sparkos - RCA - Switchmode - Noise -0dB
    Sparkos - RCA - Switchmode - Noise -0dB
    Sparkos - RCA - Switchmode - Noise - Interference
    Sparkos - RCA - Switchmode - Noise - Interference
    Sparkos - RCA - Switchmode - Lineairity
    Sparkos - RCA - Switchmode - Lineairity
    Sparkos - RCA - Switchmode - Jtest
    Sparkos - RCA - Switchmode - Jtest
    Sparkos - RCA - Switchmode - dynamic range
    Sparkos - RCA - Switchmode - dynamic range
    Sparkos - RCA - Switchmode - crosstalk
    Sparkos - RCA - Switchmode - crosstalk
    Sparkos - Sbooster - RCA - THD vs Freq
    Sparkos - Sbooster - RCA - THD vs Freq
    Sparkos - Sbooster - RCA - Response
    Sparkos - Sbooster - RCA - Response
    Sparkos - Sbooster - RCA - Noise -90
    Sparkos - Sbooster - RCA - Noise -90
    Sparkos - Sbooster - RCA - Noise -0dB
    Sparkos - Sbooster - RCA - Noise -0dB
    Sparkos - Sbooster - RCA - Noise - interference
    Sparkos - Sbooster - RCA - Noise - interference
    Sparkos - Sbooster - RCA - Lineairity
    Sparkos - Sbooster - RCA - Lineairity
    Sparkos - Sbooster - RCA - Jtest
    Sparkos - Sbooster - RCA - Jtest
    Sparkos - Sbooster - RCA - dynamic range
    Sparkos - Sbooster - RCA - dynamic range
    Sparkos - Sbooster - RCA - crosstalk
    Sparkos - Sbooster - RCA - crosstalk
    Sparkos - Sbooster - RCA - 24bit noise
    Sparkos - Sbooster - RCA - 24bit noise
    Subscribe
    Notify of
    4 Comments
    Newest
    Oldest Most Voted
    Theo Kraai
    10 months ago

    Hoi Jaap, ik lees dat je de originele TI OPA1656 dual op-amp hebt vergeleken met de SparkoS SS3602 dual op-amp. Heb je ook nog andere OPA’s geprobeerd? Bijvoorbeeld de 1612 of 1642. De 1642 heeft een JFET ingang en klinkt erg lekker, een beetje Nelson Pass sound. Ik gebruik zelf de Staccato en Weiss opa’s in mijn Purifi mono’s en die klinken ook erg goed/prettig, maar dit is uiteraard erg persoonlijk …

    Eric Rhodes
    10 months ago

    Very interesting review. Thanks to you and your Wiebren Draaier. Here in the states, this dac is treated like the next best thing since sliced bread. The hype is over the top. And I’ve been waiting for someone to bring in some reality. Well done.

    4
    0
    Would love your thoughts, please comment.x
    ()
    x
    ×