Product details

The High Quality Operational Amplifier Chip Burson V7, SparkoS Labs SS3602MUSES02 and OPA2134PA can replace the ZA3BT20A PRO, and V3's operational amplifiers and can create different sound quality, providing you with a versatile Hi-Fi listening experience. 
SS3602

 

FAQs

Please read our FAQs page to find out more.

How to: Choose the right banana plug?
  • Closed Screw Type. All Fosi amplifiers use standard-sized speaker terminals (4mm pins).
  • Easy to wire up and solidly connect to amplifier and passive speaker.
  • If they do not fit, use a little force to tighten the plugs.
  • Fosi Audio Banana Plugs (Copper, Silver/Gold Plated): http://bit.ly/40Djq0U, https://bit.ly/3MkPL8t
  • Please watch tutorial videos: https://youtu.be/6pYhoqDlvNw / https://youtu.be/RGvBgGAwS9k
How to Diagnose Power Supply Failure?
  • The following situations may cause this issue
  • Case 1: The LED on the power supply does not light up; Case 2: Amp/Preamp does not turn on; Case 3: When plugged into the Amp, both light on the amp & power supply start blinking; Case 4: Amp/Preamp make noise; Case 5: Sound shuts off by itself
  • Possible solution
  • Check if the power supply is illuminated when plugged into AC by itself.

    Plug power supply into a different socket.

    Test the adapter with a meter.

    Try a different power supply (within a range of DC input).

    Test the included power supply on other electrical equipment.

    Please watch the tutorial video by clicking on the link provided. https://youtu.be/yCjygS03zTE
What are the differences in power outputs using the 32V and 48V power supplies?
  • Using a more powerful power supply can help prevent distortion.
  • Enables amplifier to drive larger, more powerful, or higher-impedance speakers.
What is a GaN?
  • The GaN supply has a power output of 240W.
  • Offers overload and over-temperature protection.
  • The 48V 5A GaN power supply is also available on Amazon.

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Customer Reviews

Based on 107 reviews
82%
(88)
11%
(12)
3%
(3)
0%
(0)
4%
(4)
R
Robert Scharf
Musical Muses

I’m using V3 Mono blocks with Virtual Hi Fi’s Supersonic V2’s (accuracy, similar to Burson V7V’s but more lifelike/less “flat”) in dominant position and 3 paralleled Muses02’s in secondary position. Soundstage is HUGE, musical, and just enough detail without harshness.

s
steven g.
Hearing is believing

I'm new to the op-amps the new ZH3 gives you the chance to swap out the op-amps and they made it so easy to do..With the sparkos ss3602 you really do need to let it burn in at least 30hrs when i first install it with the hifiman edition xs and sundara the bass was not full , the midrange on some muisc was to forward .. the treble on the XS was sharp it made some vocals sound like they had hint of static or distortation. so after 30hrs of having music play through the ZH3 with the sparkos every thing even out and sounded amazing.. the bass was impactful and solid. the midrange was rich and balance ,, the treble with the edition xs was like it normal was but detaill... with the sundara it it evelated and enhanced them in a great way.. the soundstage on edition xs could be to much and you could be over stimulated on some sources that you are listnen to its not bad just if you are sensitve to that the sundara to dail it in to perfect..with my hearing it made the sundara sound like a headphone that was twice the price . IF you have the sundara and the ZH3 get the sparkos burn them in and enjoy.. Now to wrap up this review this is what i really love the most when it come to eq you really dont have to do much at all on the edition xs i just had to tweek the treable to get rid of the brightness and balace the upper midrange and treable out and for the low end most of the time it was fine but on some music i had to make the tiniest tweek to fill in the bass or make it thumpy .. the sundara depends on the music source . tweek the midrange little to bring it forward .. tweek the bass to make it full and solid or leave it for neutral sound.. the treble is fine.. all in all i highly recommend it.. it will the best upgrade you have made to the ZH3 my friend told me in his ZH3 with the sparkos using the filters on the ZH3 you can mimic smsl , topping and ifi audio with filter and eq.. just buy it and enjoy

L
LSPowers
Muses02 - trust Fosi for op amps

Bought two Muses02 with my new Fosi ZA3. Nice to be able to trust they are real. Fake ones are everywhere. Added one opa1656 for XLR . ZA3 sounds great. Klipsch rp600 II speakers. Very happy.

G
Gilles Gingras
fosi v3 with muse02

excelent amp with the muse02 very good sound.

p
peter westermayer
sparkos labs ss3602

the best.