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Heritage Audio '73 Jr Microphone Preamp

HHA73JRXX-P

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Now you can have a clone of venerable 1073 preamp for your 500 Series collection at a price you never imagined possible!

The mic pre you’ve been dreaming about, at a price you never imagined possible. The ’73 Jr is a chip off the old block, raised on Carnhill transformers and hand wired with care, it delivers the same massive tone as the 1073-500, in single 500 series space. Following his successful big brother, the 1073/500, the new ´73JR is a mic preamp with some added features that will cover all the recording needs for engineers and musicians that don´t find the need to track with eq.

Employing only discrete circuitry and conventional components, the ’73 junior is a faithful 3 stage all class A 1073 preamp. Styroflex and tantalum capacitors have been used throughout.  No corners  were cut.

A useful all discrete class A hi pass filter has been added, essential for recording everything especially for kick and bass. The Line mode allows for reamping of prerecorded tracks and it´s perfect for adding some class A color 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.

Finally, special care has been taken with power handling, implementing internal +24v slow turn on regulation (about 20 sec to reach full voltage). This makes your lunchbox PSU healthier and makes the 73JR independent of the rest of the slots.´

Features:
  • 80dB Class A Microphone preamplifier, HI-LO selectable minimum input impedance, balanced and floating. High gain positions show a higher impedance, ideal for old ribbon mics.
  • 50Db Class A Line preamplifier, bridging input impedance, balanced and floating.
  • All discrete Class A Ultra High Impedance J-Fet Direct Input on a high quality Neutrik Jack. The DI circuit is ahead of the Mic Input transformer, so the transformer is ON when in DI mode. DI is automatically switched on when inserting a jack.
  • Class A single ended, 2N3055 driven, high headroom output stage.
  • PAD: 20dB Mic input attenuation ahead of the input transformer to avoid overloading it.
  • HI PASS FILTER: Active all discrete Class A 3rd order Bessel, 80Hz Hi Pass Filter. 18dB/octave slope.
  • OUTPUT control to allow overloading of the preamp.
  • Internal slow turn-on +24v power supply for lower inrush current, which improves your lunchbox performance.
  • Carnhill Input and Output transformers.
  • 3 gain stage, genuine  modular card construction. All active circuitry is on pluggable cards for easier service.
  • Marconi style knobs and vintage style engraved push buttons.

Specifications:
  • 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 Carnhill transformer balanced and floating.
  • Line input impedance: 10K Ohms bridging, Carnhill transformer balanced and floating.
  • DI input impedance: Greater than 2 Megohms, unbalanced.
  • Maximum output: Greater than +26dBm 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)
  • Maximum gain: Slightly greater than 80dB
  • Noise: Less than -100dBm.
  • Power consumption: 88 mA per rail @+-16VDC.

Things You Will Get:

    Preamp
    Owner's manual
Series .
Model '73 JR
Weight .
Dimensions .

REVIEW SNAPSHOT®

by PowerReviews
Heritage Audio'73 Jr Microphone Preamp
 
5.0

(based on 1 review)

Reviewed by 1 customer

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5.0

incredible sounding unit

By 

from laredo tx

Comments about Heritage Audio '73 Jr Microphone Preamp:

superb sound great quality ||||

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'73 Jr Microphone Preamp

One year parts two year labor Manufacturer Warranty

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