Ultra-compact design saves space in any studio or setup
Accepts 8 or 16 balanced line inputs for flexible routing
Produces stereo outputs at mic level for natural sound shaping
No front panel controls, reducing cost and simplifying assembly
Compatible with any mic preamp for tailored sound shaping
Summarized by Shop
16 channels of passive, analog summing in one tiny box.
The SB2 is an 8/16x2 passive summing mixer in a ultra-compact format. Using minimal, completely passive circuitry, it sums 8 or 16 balanced line inputs down to a single set of stereo mic-level outputs. Pair the SB2 with your favorite pair of mic preamps to add glue and color to your
Input Impedance
10k ohms (balanced)
Output Impedance
150 ohms (balanced)
Crosstalk at 1kHz
-80 dB
Attenuation
45 dB (makeup gain to mic preamp)
Recommended Load Impedance
1.5k ohms
Standard Mic Preamp Input
100 ohms
Connectivity
8 or 16 balanced line inputs, 2 stereo mic outputs, XLR and DB-25 connectors
Summarized by Shop
4.9
27 ratings
5
4
3
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1
Fantastic little box with big results
J
Jason · Today
Great little box.
G
Giancarlo · June 11, 2026
This thing is wild. Took like 30 minites to assemble (and I’m not great at assembling things). The sense of openness and depth was big enough that my wife who doesnt care about mixing at all could hear the difference