Strapped vs Gain Matched Calculator
Compare strapping (bridging) two amplifiers versus gain matching them. Compare theoretical constant-voltage power and impedance for each configuration. Manufacturer linked-mode compatibility and minimum loads must be confirmed before use; entered ratings alone do not grant approval.
Amplifier Specifications
Strapping requires identical amplifiers
Both Amplifiers
Load (Subwoofer) Configuration
The combined impedance of your subwoofer(s) wired together
⚡Strapped (Bridged)
🔥 UNSUPPORTED: Each amp sees 0.50Ω, below the entered rating for Amplifier 1 (1Ω) and Amplifier 2 (1Ω). The theoretical power is not a supported safe capability. Do not use this load without explicit manufacturer linked-load approval.
How it works: Both amps combine to act as one. The load impedance is split between them (each sees 0.50Ω). One amp handles positive signal, the other handles negative.
🎚️Gain Matched
RECOMMENDEDHow it works: Both amps operate independently, each seeing the full 1Ω load. Gains are set to match output levels. Each amp powers its own set of voice coils or subs.
Theoretical Power Comparison
Strapped
8000W
+4000W
(+100.0%)
Gain Matched
4000W
Picking the Right Approach
⚡ Strapped (Bridged)
- ✓Squeezes peak output from a matching pair
- ✓One combined output—cleaner wire runs
- ✓Load splits evenly between both units
- !Only works with two of the exact same amp
- !Each amp sees half the load impedance
🎚️ Gain Matched
- ✓Mix and match amps of different ratings
- ✓Wire your subs however works best
- ✓Full impedance seen by each amp
- ✓Lose one amp, the other keeps playing
- !Gains must be set precisely to match output
💡 Real Talk
SPL competitors typically strap because raw power wins burps. Daily drivers often prefer gain matching for flexibility and redundancy if something fails. Either way, confirm your amps can handle the resulting load before hooking anything up.