Description
On stages where a DI box is the last thing standing between an instrument and a noisy signal chain, the TDP-1 earns its spot in the rack. This mono passive direct box runs on a custom-wound OEP/Carnhill transformer sourced from the UK, chosen specifically to preserve low-end warmth and top-end detail rather than flatten it out. For FOH engineers chasing a clean, gig-ready feed from bass, keys, or acoustic-electric rigs, that transformer does a lot of the heavy lifting before the signal ever reaches the console.
Build quality matters just as much on tour as tone does. The TDP-1’s circuit is hand-populated with through-hole components only — no surface-mount shortcuts — and every trace is gold-plated to keep conductivity consistent gig after gig. It’s housed in an extruded aluminum shell with recessed switches and connectors, so the -15dB pad and ground lift toggles survive load-in, load-out, and everything in between without accidental bumps or knocks.
Specs back up the build: frequency response holds within ±1dB from 10Hz to 70kHz, input impedance sits above 20kΩ to avoid loading down passive pickups, and output impedance stays under 200Ω for a clean run down long cable lines. At 482g and roughly 100mm square, it tucks into a pedalboard corner or DI bag without adding bulk to your rig.
- Custom-wound OEP/Carnhill transformer, UK-made
- -15dB pad and ground lift switches
- Rugged extruded aluminum housing with recessed controls
- 100% through-hole assembly, gold-plated traces
- Amphenol connectors, WIMA/Nichicon capacitors, 1% metal film resistors
- 1/4″ input, XLR and 1/4″ thru outputs
- 3-year warranty
For touring techs and studio engineers who want one less variable to troubleshoot mid-show, the TDP-1 delivers dependable, transformer-balanced tone with the ruggedness to back it up.
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