Heritage Audio HA-73EQ Mic preamp/equalizer Elite Series

The HA73EQ Elite is made to the same specifications as the acclaimed ´73JR, ´73EQJR and DMA73 Heritage Audio models at a price never heard before.

Leveraging the expertise and reputation obtained with its popular hand wired, extremely time-consuming hand soldered series, HA is able to offer a zero compromise, high quality yet very affordable alternative to the growing entry-level brands.

A combination of mass production, lean manufacturing and modern construction techniques, minimizes hand labor and therefore its high associated costs when manufacturing takes place in Western Europe. By passing the savings straight into the end users´ pockets, Heritage Audio releases the most affordable outboard preamps and equalizers in its class up to date.

Key components to obtain a true vintage sound are indeed maintained, like the industry standard Carnhill transformers, hand wound in St Ives, England.

Manufactured in the same Spanish facilities as the rest of the HA line of products, the HA73EQ Elite rack mountable mic preamp equalizer presents the complete classic recording channel that, for generations, has been regarded for its rich, musical qualities and its ability to dramatically improve the sound of almost any source.

No ´73 equalizer will present the correct equalization curves without high quality capacitors and, most importantly, correct “Vinkor” type pot core inductors. More than often this type of products have these expensive inductors replaced with generic ferrite core ones or, even worst, the mid band dual inductor replaced with a single one. Never in  Heritage Audio products!!, as the impact of replacing these to the eq curves is dramatic, leading to incorrect curve´s shapes  and high frequency phase distortion which in no way honor the design.

The HA73EQ Elite employs WIMA 5% capacitors in the EQ section as well as 3 correct vintage type “Vinkor“ pot core inductors so the eq curves are virtually undistinguishable from the handmade equalizers in the HA line. Customers can expect the same sonic quality and feel they have come to appreciate from Heritage Audio.

The HA73EQ’s preamp section features gain, output trim, -20db pad, polarity reverse, a high pass filter, and +48v phantom power.  The HA73EQ’s EQ section features a high shelving EQ, midrange EQ, low shelving EQ, a variable high pass filter, and EQ Bypass,.  The HA73EQ comes housed in a rugged 1RU British steel and aluminum chassis and utilizes an external power supply for low noise operation.

Specifications:

• Microphone input impedance: HI, 1200 Ohm minimum, LO, 300 Ohm minimum. Higher gain positions gradually have greater impedances, optimum for low gain ribbon mics. Input is transformer balanced and floating.
• • Line input impedance: 10KOhms bridging, transformer balanced and floating.
• • Output impedance: Less than 75 Ohms, transformer balanced and floating, to drive a load of 600 Ohms.
• • Maximum output: Greater than +26.5dBu into 600 Ohms (internally terminated)
• • THD: Less than 0.025% at 1Khz, Less than 0.05% at 100Hz.
• • Frequency response :20Hz (+0.3dB) to 20Khz (-0.2dB).EQ Off. For EQ ON frequency response please check the features section.
• • Maximum Gain: Slightly greater than 80dB.
• • Equivalent Input Noise: Less than -125dBu.
• Output stage noise: Less than -100dBu.
• • Power consumption: Less than 95 mA @48VDC.