Heritage Audio TT73
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Manufacturer Information
Heritage Audio
https://www.heritageaudio.com
info@heritageaudio.com
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Heritage Audio S.L.
Email: info@heritageaudio.com
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From the DMA73 spirit to the TABLETOP 73 format: the same philosophy, more playgrounds
TT-73 stands for "TABLETOP 73": it is, in essence, a DMA73 reformatted into a 1-channel version, designed to extend uses beyond the control room. While a studio preamp often remains stationary, the TT-73 aims for a more versatile approach: on stage, portable systems, "on location" recordings, or even hotel room sessions, without sacrificing serious audio architecture.
This tabletop version emphasizes ergonomics and practicality: the goal is to integrate a "73"-type sound into real modern production contexts, whether to feed a front of house, reduce mic cable lengths, or maintain a coherent chain between stage and recording.
A preamp for musicians, live engineers, and mobile studios
The TT-73 is aimed at musicians who want to control their level and tone before the console, notably via the front DI inputs: ideal for bass, guitar, keyboards, or any instrument-level source. In live situations, this allows sending the FOH engineer a signal already enhanced, with comfortable headroom, while keeping a simple and quick setup.
In recording, it becomes a natural ally for mobile setups: a stage mic can be raised to line level without resorting to long cables that may add noise or losses. For vocals, acoustic instruments, and dynamic sources, the wide gain range supports both "standard" mics and more demanding models, including certain ribbons, with particular attention to impedance matching.
Technical specifications
| Number of channels | 1 | Category | microphone preamp |
| Valve | No | Color | Grey |
Questions frequently asked
Is the Heritage Audio TT73 suitable for ribbon microphones?
With a maximum gain slightly above 80 dB and a selectable HI or LO mic impedance, this preamp can support ribbon microphones requiring higher gain. The higher gain settings gradually increase the input impedance.
Can a bass or guitar be connected directly?
The front-panel DI input has an impedance above 2 megohms, suitable for instrument sources. A DI THRU output allows simultaneous feeding of an instrument amplifier.
Which connector helps to avoid ground loops on stage?
A ground lift switch is provided to reduce hum caused by ground loops when connecting between amplifier, console, and recorder.
What output level does this microphone preamp deliver?
The balanced, floating Carnhill transformer output exceeds +26 dBm into 600 ohms. Its impedance is below 75 ohms and can drive a 600-ohm load.
Is the tabletop format suitable for a mobile studio?
The chassis combines wood and RAF blue-grey steel in a desktop format intended for portable control rooms. The internal worldwide power supply is designed to operate near audio transformers with noise specified below -100 dBm. The frequency response spans from 20 Hz to 20 kHz.



