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Heritage Audio

Heritage Audio HA-81A EQ Channel Strip

MSRP: $3,995.00
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Heritage Audio HA-81A EQ - Elite Series Channel Strip

The Heritage Audio HA-81A EQ Elite is a blend of classic console circuits, offering a powerful combination of a Class A 73-style mic preamp with a versatile, musical console-style equalizer. This channel strip is engineered to deliver the iconic sound that's been a staple in the recording industry.

Key Features:

  • Class A 73-Style Mic Preamp: Incorporates an 80 dB, all-discrete Class A design with renowned Carnhill St Ives input and output transformers.
  • Versatile Equalizer Section: Features a 4-band inductor-based EQ with high and low pass filters, including Shelf or Bell response curves on the high and low bands, dual Q on both mid bands, and 40 frequency selections.
  • Hybrid Console Design: Merges two iconic console EQ and preamp designs for a unique audio experience.
  • High-Quality Construction: Made using cutting-edge manufacturing techniques without compromising audio quality.
  • User-Friendly Controls: Utilizes rotary switches and precision potentiometers for easy and precise adjustments.


  • Mic Input Impedance: HI=1200 Ω, LO=300 Ω; adaptable for different mic types, including low gain ribbon mics.
  • Line Input Impedance: 10 kΩ, transformer balanced and floating.
  • Output Impedance: <75 Ω, capable of driving a 600 Ω load.
  • Maximum Output Level: >+26.5 dBu into 600 Ω.
  • THD: <0.025% at 1 kHz, <0.05% at 100 Hz.
  • Frequency Response: 20 Hz to 20 kHz (+0.3 dB / -0.2 dB) with EQ off.
  • Maximum Gain: >80 dB.
  • Noise Levels: Equivalent Input Noise < -125 dBu at 80 dB mic gain; Output stage noise < -100 dBu.
  • Power Consumption: <150 mA @ 48 V DC.

Manufactured at Heritage Audio’s headquarters in Madrid, Spain, the HA-81A EQ Elite Series Channel Strip is designed for audio professionals who seek the perfect blend of classic analog warmth and modern functionality.

Short Description:
Channel Strip with 73-Style Mic Preamp & 81-Style EQ
california pro_65:
Solid State
Number of Channels:
Type (Channel Strips):
Channel Strip
Type (Preamps):
Channel Strip
2 Years