Electro Harmonix Tri Parallel Mixer

Parallel Effects Loop Mixer for Triple-Chain Routing

The Electro Harmonix Tri Parallel Mixer is a 3-channel effects loop mixer and switcher that runs three pedal chains in parallel rather than stacking them in series. Dry signal stays available to every loop, so tracker-sensitive stomps such as fuzz, octavers, and harmonizers keep their bite. It also acts as an amp combiner and an instrument switcher, no rack unit or extra routing box required.

Two Operating Modes in One Stompbox

Each channel strip mirrors the others and carries send level, return level, EQ, and a phase-invert switch. XOR mode turns the pedal into a single-channel switcher where one channel engages and the other two drop out automatically. AND mode layers every active loop together for studio-style tone blending in front of the amp.

Signal Routing and I/O Architecture

Three mono loops give the unit enough bandwidth to experiment fully with wet/dry mixes without losing clarity in any chain.

• FX Loops: 3 mono loops with independent send and return paths.
• Footswitches: 3 channel switches for instant per-loop engagement.
• Inputs and outputs include 1 x 1/4" instrument input, 3 x 1/4" returns, 1 x 1/4" main output, and 3 x 1/4" sends, suitable for triple-amp or triple-instrument setups.

Buffered Bypass, Power Supply, and Pedalboard Footprint

The buffered signal path maintains guitar and bass tone integrity across long cable lengths, while AC power design ensures reliable operation night after night.

• Bypass: Buffered (no true bypass) — preserves high-end frequencies over distance.
• Power is supplied via a 9.6 V DC 200 mA wall adapter (included), 45 mA current draw, eliminating the need for batteries.
• Dimensions: 146 × 121 × 64 mm — fits into a standard pedalboard row.

Per-Channel Sound Sculpting Tools

Each channel includes level, EQ, and phase shaping so that three very different effects can coexist without frequency clashes.

• Per-channel Controls: send level, return level, EQ (high/low band), 180° phase switch.
• Operating Modes: XOR (single-channel switcher) and AND (multi-channel mixer).
• Global Controls: Dry Volume knob plus Master Volume for final blend balance and output level.