A 73-style channel with the flexible 81 mid bands – in one 80 Series module. The Heritage Audio 8173 is a 73-sized 80 Series input module that adds the 81 mid bands to the classic 73 design. It is made to fill input slots when restoring vintage 80 Series consoles, and also fits the Heritage Audio Frame 8 and Rack-2 or any rack, console or enclosure that follows the same mechanical and electrical standard.
Why customers choose it
Who it is for
Studios with 80 Series consoles or racks, engineers restoring vintage desks, and anyone who wants a 73-style mic preamp with a more flexible EQ for vocals, drums, guitars and mixing.
What’s in the box
- 1 x Heritage Audio 8173 module
Specifications
| Format | Standard 80 Series module |
|---|---|
| Mic preamp | Class A, maximum gain slightly greater than 80 dB |
| Line amp | Class A, 10 dB gain |
| EQ | 4-band: 81-style mid bands, Baxandall high shelf (3 frequencies) and low shelf |
| High-pass filter | 50 / 80 / 300 Hz |
| Maximum output | Greater than +26 dBu into 600 ohm |
| THD | Less than 0.025 % at 1 kHz; less than 0.05 % at 100 Hz |
| Frequency response | 20 Hz (+0.3 dB) to 20 kHz (-0.2 dB) |
| Noise | Less than -100 dBu |
| Power consumption | Less than 110 mA at 24 V DC |
| Dimensions (W x H x L) | 45 mm x 224 mm x 304 mm |
| Type | 80 Series microphone preamp and EQ module |
| Circuit | Class A, hand-wired |
Good to know
- This is a module: it needs an 80 Series frame or console to run, such as the Heritage Audio Frame 8 or Rack-2.
- +48 V phantom power comes from your 80 Series chassis.
- For the 1066-style mid band instead, see the Heritage Audio 6673.
FAQ
Can I use it on its own on my desk?
No. It needs a powered 80 Series enclosure such as the Frame 8 or Rack-2.
Does it have phantom power for condenser mics?
Yes, +48 V is supplied by the 80 Series chassis it sits in.




























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