Heritage Audio 81A Elite. 73 Preamp with 81 EQ

Introducing Heritage Audio’s HA-81A EQ: a new mix of 2 classic console circuits.
The HA-81A EQ Elite is a channel strip that combines an all discrete, Class A 73-style mic preamp with an extremely versatile and musical console style equalizer — arguably the trick for obtaining instant classic sound for all recording engineers.

The HA-81A’s preamp section is an 80 dB, all discrete Class A design with Carnhill St Ives input and output transformers, exactly the same ones found in the other Elite Series modules.
The preamp features gain, output trim, -20 dB pad, polarity reverse, and +48 V phantom power.

The HA-81’s equalizer section is an exceptionally musical 4 band, inductor-based equalizer with high and low pass filters. Where 3 band equalizers such as the typical 73-style exceed at musicality but may be short of features, the HA-81A EQ excels at both equally. Extreme control over Shelf or Bell response curves on the high and lows, dual Q on both mid bands, with dedicated high and low mid bands, and a range of 40 frequency selections to choose from.

Specifications:

Microphone input impedance: HI=1200 Ω minimum, LO=300 Ω minimum. Higher gain positions gradually have greater impedances, optimum for low gain ribbon mics. Input is transformer balanced and floating.
Line input impedance: 10 kΩ bridging, transformer balanced and floating.
Output impedance: Less than 75 Ω, transformer balanced and floating, to drive a load of 600 Ω.
Maximum output: Greater than +26.5 dBu into 600 Ω (internally terminated).
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) – EQ Off.
Maximum Gain: Slightly greater than 80 dB.
Equivalent Input Noise: Less than -125 dBu at 80 dB mic gain.
Output stage noise: Less than -100 dBu.
Power consumption: Less than 150 mA @48 V DC.

US and EU parcels ship via UPS, ETA 1-7 working days from pickup day zero. That also applies to most locations worldwide.

All shipments are fully insured.

Bigger shipments requiring pallets or custom made crates ship to US, CA, JP, CN, AU and other outside of EU locations via DHL Air Freight, ETA is normally approx. 7-14 working days from pickup day zero.

Big shipments inside EU ship via different freight companies, recently mostly via ACE Logistics. Freight forwarders can use different courier companies for deliveries to final destinations.

Palletising and crating time can vary depending on the size of the shipment and packaging queue. We pack all our shipments with great care.

You are most welcome to pick your order up yourself from our Retrosonic Pro Audio showroom, studio and warehouse in Tallinn, Estonia.

We ship worldwide – contact us for a personal shipping quote or any other questions.

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