The 73 equaliser sound in one 500 Series slot. The Heritage Audio 73EQ JR is a line-input EQ module for 500 Series racks. It shares the 3-band equaliser of Heritage Audio’s 6673 80 Series unit, plus the same transformer-coupled line preamp and Class A transformer-balanced output, so you get a full transformer-based Class A sound without an external preamp.
Why customers choose it
Who it is for
Home, project and commercial studios that want a hardware 73-style EQ for mixing, re-amping tracks from the DAW, bass, vocals or drum buses, in a 500 Series rack.
What’s in the box
- 1 x Heritage Audio 73 EQ JR 500 series module
Specifications
| Format | 500 Series module, line input |
|---|---|
| EQ | 3-band: high shelf (4 frequencies), dual-inductor mid, low shelf |
| Line preamp range | +6 to -20 dB |
| Input impedance | 10 kohm bridging, transformer balanced and floating |
| Output impedance | Less than 75 ohm, transformer balanced and floating (drives 600 ohm) |
| Maximum output | Greater than +26 dBu into 600 ohm |
| THD | Less than 0.025 % at 1 kHz; less than 0.05 % at 100 Hz |
| Maximum gain | 6 dB |
| Power consumption | Less than 85 mA per rail at +/-16 V DC |
| Type | 500 Series line-input equaliser |
| EQ Bands | 3 (high shelf, mid, low shelf) |
| Circuit | Class A, transformer coupled |
Good to know
- This is a line-level EQ. It has no microphone preamp; its big brother with mic preamp is the Heritage Audio 6673 80 Series unit.
- Needs a 500 Series rack (chassis) with power, such as the Heritage Audio OST series.
- Takes about 20 seconds after power-on to reach full voltage – this is normal.
FAQ
Can I plug a microphone into it?
No. It has a line input only. Use a mic preamp before it.
Why does it take a moment to start?
The internal slow turn-on regulation brings the module up gently, which is easier on your rack’s power supply.
Talk to Suhavi
Reviews
There are no reviews yet.