Heritage Audio 8173 80 Series EQ

Product Description

The Heritage Audio 8173 module is engineered to fill input module slots of the vintage 80 Series sound mixing consoles. It is also compatible with the Heritage Audio Frame 8 and Rack 2 powered enclosures. Heritage have decided to keep the '73-style Baxandall shelving lo and high EQ bands as they sound amazing, but have implemented a choice of 3 high shelving frequencies, à la 1084.

Special care has been taken in sourcing the correct components ensuring the closest performance to original units as possible. Custom polystyrene and polypropylene film tone capacitors have been developed to closely match the Siemens Styroflex and Mullard Mustard types of the late 60s/early 70s. Custom input transformers have also been co-designed with Carnhill Transformers' Oxford factory to Heritage's special requirements, ensuring correct harmonic distortion content and saturation points.

The Heritage Audio 8173 is entirely handmade in Heritage's facilities in Spain, employing the same old-fashioned wiring and soldering techniques of the 70s. All its circuitry is held in five plug in cards.

Specifications:

• Microphone input impedance: HI, 1200 Ohm minimum, LO, 300 Ohm minimum, higher gain positions gradually have greater impedances, optimum for lo gain ribbon mics, input is transformer balanced and floating
• Line input impedance: 10 kOhms bridging, transformer balanced and floating
• DI input impedance: Greater than 2 Megohms, unbalanced
• Output impedance: Less than 75 Ohms, transformer balanced and floating, to drive a load of 600 ohms (factory terminated)
• Maximum output: Greater than +26 dBu into 600 ohms
• 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)
• Maximum gain: Slightly greater than 80 dB
• Noise: Less than -100 dBu
• Power consumption: 110 mA per rail @±16 VDC