Heritage Audio 500 Series 73EQ JR EQ, 1RU

SKU: HA73EQJR MFR: HA73EQJR
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Key Features

  • Sculpt your sound with precision using this 500 Series EQ for recording.
  • Achieve pristine audio: Low noise design ensures clean signal processing.
  • Versatile tone shaping: Perfect for vocals, guitars, drums, and more.
  • Get that classic sound: Experience warm, vintage-style EQ in your studio.
  • Craft your signature sound with +/-18dB Mid band equalization control.
  • Integrates seamlessly into any 500 series rack for easy connectivity.
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Special Order?Estimated to Ship: 09/16/2025
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Heritage Audio 73EQ JR Specifications

  • Input Impedance

    10kOhms bridging, transformer balanced and floating

  • Output Impedance

    Less than 75 ohms, transformer balanced and floating, to drive a 600ohm load

  • Maximum Output

    Greater than +26dBu into 600 ohms

  • THD

    Less than 0.025% at 1kHz, less than 0.05% at

  • Maximum Gain

    6dB

  • Frequency

    High: +/- 16dB shelving, selectable at 10, 12, 16 or 20Khz, Baxandall type
    Low: +/- 16dB shelving, with selectable frequency of 35, 60, 110 or 220 Hz, Baxandall type
    Mid: +/- 18dB peaking, fixed Q, selectable center frequencies of 0.36, 0.7, 1.6, 3.2, 4.8 and 7.2 KHz, dual inductor based

  • EQL button

    Turns EQ on

  • Power Consumption

    Less than 85 mA per rail at +/-16 VDC

  • Rack Size

    1 RU of 500 series

  • Dimensions (H x W x D)

    5.25 x 1.50 x 5.94" / 13.34 x 3.81 x 15.09cm

  • UPC Code

    638142858922

About Heritage Audio 73EQ JR

Be at the forefront of professional audio recording with the 500 Series 73EQ JR EQ, a top-tier line input module from the esteemed Heritage Audio brand. This advanced audio equipment is a reliable and durable solid-state preamplifier and equalizer, designed to elevate your studio or live sound setup.

The 73EQ JR EQ is not just another module in the 500 Series; it stands out with its unique features and superior performance. It shares the same 3-band equalizer as its renowned sibling, the 1073, offering you the same high-quality sound output. But what sets it apart is its transformer-coupled line preamp and Class A transformer balanced output stage, allowing it to capture a full transformer-based, Class A sound without the need for external preamps.

The equalizer in this professional audio equipment features the same Baxandall type High and Low shelf found in the 1073, but with an added high-frequency selector switch. This gives you the flexibility to choose from 4 different frequencies, instead of being limited to the fixed 12Khz one, offering you more control over your sound output.

The mid band of the 73EQ JR EQ is the same dual inductor 1073 one, providing thick low and sweet high midrange boosts without compromising on sound clarity. It ensures your sound is never muddy or brittle, making it an ideal choice for professional audio applications.

The line preamp of this advanced audio equipment has a range of +6 to -20dB, allowing for heavy eq boosts without the risk of overloading A/D converters. This ensures your sound remains clear and distortion-free, even at high volumes.

Special attention has been given to power handling in the 73EQ JR EQ. It features an internal +24v slow turn-on regulation, taking about 20 seconds to reach full voltage. This makes your 73EQ JR EQ independent of the rest of the slots and ensures a longer lifespan for your lunchbox's PSU.

In conclusion, the 500 Series 73EQ JR EQ is a high-quality, durable, and reliable choice for professional audio recording, offering advanced features and superior performance that set it apart in its class.

Heritage Audio 73EQ JR Features

  • +6 to -20dB Class A Line preamplifier, bridging input impedance, balanced and floating
  • Class A single ended, 2N3055 driven, high headroom output stage
  • Internal Slow Turn-on +24v power supply for lower inrush current, improving lunchbox performance
  • Carnhill Transformers
  • Marconi style knobs

Product Documents

User Manual

Key Features

  • Sculpt your sound with precision using this 500 Series EQ for recording.
  • Achieve pristine audio: Low noise design ensures clean signal processing.
  • Versatile tone shaping: Perfect for vocals, guitars, drums, and more.
  • Get that classic sound: Experience warm, vintage-style EQ in your studio.
  • Craft your signature sound with +/-18dB Mid band equalization control.
  • Integrates seamlessly into any 500 series rack for easy connectivity.

What's in the box:

  • Heritage Audio 500 Series 73EQ JR EQ
  • Heritage Audio 1 Year Parts & Labor Warranty