TECHNICAL SPECIFICATIONS

Format: 19" 1U rackmount unit
Channels: 8 independent microphone/line preamplifiers
Input Stage: Ultra-low noise THAT 1512 IC (as used in SSL SuperAnalogue™ and Grace Design architectures)
Output Stage: Electronically balanced THAT 1646 IC
Gain Range: Continuous 0 dB to 55 dB per channel
Power Supply Architecture: Isolated multi-rail system (±15 V audio, +48 V phantom, +12 V relays, +5 V LEDs)
Connectivity:
- DB25 line inputs and outputs (Tascam wiring standard)
- Rear XLR microphone inputs/TRS line inputs

DETAILED FEATURES

Eight Fully Featured Preamplifier Channels:
- Precision Gain Control: 0–55 dB continuous gain range utilizing high-quality Polyshine and Alps Alpine potentiometers
- Variable High-Pass Filter: 10 Hz – 250 Hz sweep range with a steep 24 dB/oct slope for precise low-end cleanup
- 48 V Phantom Power: Independent relay-switched phantom power per channel for condenser mics and active DI boxes
- Polarity Invert (Phase): Relay-switched polarity flip per channel
- -20 dB Input Pad: Relay-switched attenuation for high-output microphones and hot line signals
Short Signal Path Topology: Relay-controlled switching keeps audio traces minimal and isolated from front-panel switch noise
Real-Time LED Metering: Dual-LED level indicators (signal/peak) per channel for accurate input gain staging
Audio-Grade Components: Built with audio-grade Nichicon capacitors, precision resistors, and heavy-duty pots

WHAT'S INCLUDED IN THE KIT?

This is a full 19" rackmount DIY kit including all parts for a successful build:

Powder-coated 19" 1U rack enclosure with high-quality printed front panel
Complete set of PCBs (mainboard, channel boards, power supply)
All electronic components (resistors, audio-grade Nichicon capacitors, ICs, THAT chips, relays)
Heavy-duty power transformer/PSU components
Full set of high-quality Sifam control knobs and switches

(Note: This product requires assembly and soldering skills. Interactive assembly guides are available in our Build Manuals section.

Help yourself and others in the corresponding GDIY Help Thread

TP812

Name: TP812
Price: 649 EUR
Availability: InStock

From €649.00

Excluding Sales Tax

KIT

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Pure Clarity & Precision – 8-Channel 19" Rackmount Microphone Preamplifier

The TP812 is a high-performance 8-channel microphone preamplifier housed in a robust 19" rackmount chassis (1U). Built around ultra-clean THAT 1512 input stages and THAT 1646 balanced output drivers, the TP812 delivers transparent, low-noise amplification with stunning detail and dynamic headroom across all eight channels. Now, you can build this versatile studio centerpiece yourself.

The THAT 1512 architecture is widely regarded as a reference standard in professional audio engineering – trusted by industry leaders like Solid State Logic (SSL) in their SuperAnalogue™ console topologies, as well as in high-end reference preamps and mastering interfaces from Grace Design, RME, and Focusrite. Known for its ultra-low noise floor (1 nV/√Hz) and lightning-fast transient response, it ensures your recordings remain pristine, fast, and completely uncolored.

Designed with an uncompromising signal path, all main switching functions (Pad, Polarity, 48 V) are relay-controlled to keep audio traces as short and pure as possible. Each channel features an independent variable 24 dB/oct High-Pass filter (10 Hz – 250 Hz), signal/peak LED metering, and flexible I/O connectivity – including rear DB25 connectors (Tascam standard) alongside dedicated XLR mic and TRS Line inputs.

To guarantee pristine audio performance, the unit incorporates an advanced isolated multi-rail power supply design, completely decoupling the ±15 V audio rails from the 48 V phantom power, 12 V relay system, and 5 V LED indicators to eliminate crosstalk or power supply interference.

Product name: TP812 Product identifier: TP812X001/TP812X002/TP812X003 Manufacturer: Link Audio Design, August-Bebel-Str.18, 08373 Remse, linkaudiodesign@gmail.com
Shipping Rates: Calculated based on your location and the weight of your order
Domestic Shipping: Standard shipping within Germany via DHL
Economy Worldwide: Slow shipping up to 0.5 kg via DHL Envelope Service (up to 20 days delivery time)
Express Options: UPS Expedited and Express Saver available at checkout
Returns: Untouched DIY kits can be returned within 14 days of receipt (EU orders only; see our Return Policy for details)

TP812

Product Information

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high-resolution audio samples of our kits in direct comparison

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