Heritage Audio HA-81A Elite

Heritage Audio HA-81A Elite is a Channel Strip with a 73-style microphone preamp with a pad, a 4-band 81-style EQ with dual-adjustable Q on the mids, low-pass/high-pass filters, a 20Hz-20kHz frequency range, analog 1 x XLR (mic), 1 x XLR (line), 1 x 1/4” (Hi-Z) inputs, analog 1 x XLR output, polarity switch, 1U rack size, and a power supply included.

HA-81A Elite combines a discrete Class A microphone preamp with up to 80dB of gain with an EQ inspired by the legendary Neve 81. The amp uses Carnhill and St. Ives input and output transformers for a warm and powerful sound. The preamp section allows adjustment of gain, output level, pad engagement, polarity switching, and +48V phantom power. The EQ section features 4-band control with musical tonal color based on the coil with high-pass and low-pass filters. It provides the ability to choose between Shelf and Bell, set dual Q on both mid bands, isolate high and low mids, and 30 extra frequency options.

HA-81A Elite Key Features

• Preamp and EQ
• Based on 73-style mic preamp and 81-style EQ
• Mic, instrument, and line inputs
• Completely Discrete
• Class A circuitry
• Carnhill and St. Ives input and output transformers
• Hand-crafted in Spain.

HA-81A Elite Specifications

• Mic Input Impedance: High=1200 Ω minimum; Low=300 Ω minimum. Higher gain positions progressively have higher impedances, optimal for low output ribbon microphones. Input is transformer balanced and floating
• Input Impedance: 10 kΩ bridging, transformer balanced and floating
• Output Impedance: Less than 75 Ω, Carnhill transformer balanced and floating, to drive a 600 Ω load (Factory terminated)
• DI Input Impedance: Greater than 2 MΩ, unbalanced
• 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 above 80 dB
• Output Stage Noise: Less than -100 dBu
• Power Consumption: Less than 150 mA at 48V DC
• Dimensions (W x H x D): 482 mm x 44 mm (1 rack unit) x 184 mm.