Heritage Audio HA73EQ Elite

Heritage Audio HA73EQ Elite is a single-channel Class-A microphone preamplifier and 3-band equalizer with 80 dB of Gain, 20 dB pad, switchable high-pass filter, DI Input, with analog inputs 1 x 1/4" (Hi-Z), 1 x XLR (mic), 1 x XLR (Line), analog XLR output and Polarity Switch.

HA 73EQ - is an Elite series microphone preamplifier with mono equalizer, designed to deliver the sound of classic Neve 1073 preamps and equalizers. It's built in a 1U rack format and is intended for sound engineers, musicians and vocalists for stage work, as well as in home, project, and commercial studios. It provides 80 dB of gain through a 3-stage discrete Class-A preamp that utilizes stepped gain at the input and a -20 dB pad. Hand-wound Carnhill transformers add color and character to the output signal.

You can connect a microphone through the XLR connector, bass guitar, electric guitar, keyboard through the Hi-Z line input, which is based on a JFET DI through the 1/4" jack on the front panel. Shape and smooth your tone with the discrete 3-band equalizer, which includes semi-parametric low and mid bands and a 12 kHz high-frequency shelf. Steps were taken to include inductors with period correction and frequency options. Phantom power and input impedance can be selected, the output level is smoothly adjustable, and a four-selectable frequency high-pass filter allows you to remove unwanted low frequencies.

HA 73EQ comes with an external universal power supply for hassle-free use anywhere in the world.

HA73EQ Elite Features

• Fully analog
• 3-stage Class-A microphone preamplifier
• Hand-wound Carnhill transformers in England
• Separate input and output gain controls
• Pad on the microphone input
• LOZ switch for microphone transformer input impedance
• High-pass filter
• +48V Phantom Power
• Polarity switch
• Ultra-high-impedance JFET-based DI input
• 3-band equalizer with vintage-correct inductors
• High-frequency shelf at 12kHz
• 6-position mid-frequency switch with an OFF position
• Low-frequency shelf selectable between 4 frequencies and OFF
• Suitable for installation in a standard 19" 1U rack
• External universal power supply for operation in all regions of the world.

HA73EQ Elite Specifications

• Microphone input impedance: High=1200 Ω minimum; Low= 300 Ω minimum. Higher gain positions gradually have greater impedances, optimum for low gain ribbon mics. 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 load of 600 Ω (Factory terminated)
• D.I. 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)
• Maximum Gain: Slightly greater than 80 dB
• Output stage noise: Less than -125 dBu
• Power consumption: Less than 260 mA @48 V DC
• Dimensions (W x H x L): 482 mm x 44 mm (1 Rack unit) x 184 mm