The classic 73 preamp sound you can carry to any session. The Heritage Audio TT-73 (TableTop 73) is, in essence, a single channel of Heritage Audio’s DMA 73 reformatted as a portable desktop unit. Use it in the studio, on stage, in a hotel room or on location for big, Class A 73-style mic, line and instrument recordings.
Why customers choose it
Who it is for
Singers, guitarists and bass players, home studio owners, live performers and engineers who want a real 73-style preamp they can move between studio, stage and location work.
What’s in the box
- 1 x Heritage Audio TT-73
- AC power cord (EU & US)
Specifications
| Channels | 1 |
|---|---|
| Mic input impedance | HI 1200 ohm minimum, LO 300 ohm minimum; transformer balanced and floating |
| Line input impedance | 10 kohm bridging, transformer balanced and floating |
| DI input impedance | Greater than 2 Mohm, unbalanced |
| Output impedance | Less than 75 ohm, transformer balanced and floating (600 ohm load) |
| Maximum output | Greater than +26 dBu into 600 ohm |
| Maximum gain | Slightly greater than 80 dB |
| Frequency response | 20 Hz (+0.3 dB) to 20 kHz (-0.2 dB) |
| THD | Less than 0.025 % at 1 kHz; less than 0.05 % at 100 Hz |
| Noise | Less than -100 dBu |
| Power | Internal worldwide power supply |
| Type | Desktop microphone preamp |
| Circuit | Class A |
Good to know
- Need two channels for stereo? See the Heritage Audio DTT-73.
- The power supply is built in, so no external adapter is needed.
- No EQ on this unit – it is a preamp only.
FAQ
Can I plug my guitar or bass straight in?
Yes. Use the front-panel DI input; the DI Thru jack can feed your amp at the same time.
Will it work on Indian mains power?
Heritage Audio describes the internal supply as worldwide.
































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