Heritage Audio HA73JR2 Microphone Preamp

Heritage Audio
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Heritage Audio 73JRII Microphone Preamp

500 Series Microphone Preamplifier/DI, with 80dB of Mic Preamp Gain, 50dB of Line Preamp Gain, -20dB Pad, and 80Hz Low-cut Filter

In stock!

About the update:

The 73JRII  is the 2021 update to the classic 73JR, a true 73 style mic preamp in a single 500 series slot with some added features that will cover all the recording needs for engineers and musicians that don't need to track with eq.

Employing only discrete circuitry and conventional components, the 73JRII is a faithful 3 stage all class A 73 preamp. Styroflex and tantalum capacitors have been used throughout.  No corners were cut.

The useful all discrete class A hi pass filter has been updated, making it sweepable from 20 to 220 Hz. Now it is even easier to make your low end tighter without affecting desired frequencies.

The Line mode allows for reamping of prerecorded tracks and it's perfect for adding some class A colour to lifeless recordings.

The smart switched DI (automatically switches from MIC to DI mode when inserting a MONO ¼” jack) is an all discrete class A JFET circuit ahead of the MIC transformer, so all the juice is there. Since its introduction in 2013, it has become a classic DI for bass.

Finally, special care has been taken with power handling, implementing internal +24v slow turn on regulation (about 20 seconds to reach full voltage).This makes your 500 series enclosure's power supply healthier and makes the 73JR independent of the rest of the slots.

A World-class Preamp That's Ready for Anything

The Heritage Audio HA73jr 500 Series microphone preamplifier brings a huge dose of vintage vibe straight to your rack. It's based on the iconic 1073, amplifying any microphone or instrument clearly and vibrantly. And because there are separate input and output gain controls, you can drive the HA73jr's input to get rich, saturated sound like you would on a vintage console. Factor in an incredible 80dB of gain, and you've got a preamp that's ready to bring out the best of any microphone - condenser, dynamic, or ribbon. Said another way, it's difficult to get a bad sound out of the Heritage Audio HA73jr.

Add rich transformer saturation to any source

The Heritage Audio HA73jr has Carnhill input and output transformers, ready to add a touch of glow to any sound source - mic, line, or even DI instruments. The DI circuit is ahead of the mic input transformer, perfect for adding some hair to DI bass signals on the way in. Best of all, the HA73jr preamp module has separate input and output gain controls. That lets you crank the input gain to get more transformer color, without overloading the output stage.

Heritage Audio HA73jr MKII 500 Series Microphone Preamplifier Module Features:

  • Sonically-versatile mic preamp and DI module based on the classic 1073
  • 20dB pad on the mic input prevents overloading the input transformer
  • Up to 80dB of gain for the mic input, 50dB line preamplifier
  • All-discrete, Class A circuitry
  • DI input circuit is before the input transformer, which lets you add colour and richness to DI instruments
  • Separate input and output gain controls let you drive the input for saturation without overloading the output
  • Microphone input impedance: HI, 1200 Ohm minimum, LO, 300 Ohm minimum. Higher gain positions gradually have greater impedances, optimum for lo gain ribbon mics. Input is transformer balanced and floating.
  • Line input impedance: 10K Ohms bridging, transformer balanced and floating.
  • DI input impedance: Greater than 2 Megohms, unbalanced.
  • Output impedance: Less than 75 Ohms, transformer balanced and floating, to drive a load of 600 ohms (factory terminated).
  • Maximum output: Greater than +26dBu into 600 ohms
  • THD: Less than 0.025% at 1 Khz, less than 0.05% at 100Hz
  • Frequency response: 20Hz ( +0.3dB ) to 20Khz (-0.2dB)
  • Noise: Less than -100dBu.
  • Power consumption: 88 mA per rail @+-16VDC

Add a powerful, versatile preamp to your right with the Heritage Audio HA73jr!

STL Pro Audio is the exclusive distributor for Heritage Audio in NZ. All products come with full 12 months manufacturer warranty.