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JDK (Arsenal) Audio R24 Stereo EQ  From JDK Audio

Stereo 4 Band EQ with a Vintage Flair and a Robust Build

JDK Audio (Arsenal by API)

Manufacturer's Description from JDK Audio

The JDK Audio R24 Dual Channel, 4-band equalizer, features two identical channels of equalization in a rack mounted unit with internal power supply. The eq features continuously variable adjustment of frequency and gain using individual controls.


  • 4 bands of equalization modeled after the classic APSI model 562 EQ
  • Each band offers continuously variable control of frequency and gain, using separate knobs
  • 12 dB of boost/cut per band
  • All 4 bands are peak/dipping parametric configuration
  • Custom transformer balanced output
  • Fully balanced 1/4" and XLR input and output
  • High headroom +24 dB clip level

The EQ-R24 offers two channels of professional signal equalization. Modeled after the circuitry of classic high end EQ's, the R24 delivers an affordable combination of rugged construction and solid performance. EQ in and out are controlled by classic toggle switches, with gain and frequency selection accessed using individual control knobs.

JDK Audio (Arsenal by API)

About Manufacturer

JDK Audio is an entirely new brand developed and engineered by API, a company that has been around since the late 1960's. Originally called Arsenal Audio, they have permanently changed the name of this fabulous new range to JDK. And, while API had a stellar range of excellent audio products that are benchmarks of the recording world, we decided to embark on a product line that would allow our engineering team to develop some new ideas that have been floating around our engineering table for years. After all- we're a Technology company - its what drives us - its what inspires us. And some of the new technology available to us is pretty cool stuff - it just doesn't fit anywhere in the API product mix. So JDK audio was born out of desire to expand the creative options we have available at API - no boundaries - no restrictions


Inputs: Balanced XLR and 1/4" parallel jacks

Outputs: Transformer Balanced XLR and 1/4" parallel jacks (All measurements with 600 Ohm output load)

Power Consumption, Quiescent: 5.06 Watts

Bandwidth: +/- 0.5 dB, 20 Hz - 20 kHz

THD+N @ 1 kHz, +4 dBu: 0.01%

Maximum Level: +23 dBu

Signal-to-Noise Ratio: -100 dB

EQ Bands: 4 bands, all +/-12 dB Peak/Dip type

Lo: 20 Hz - 200 Hz

Lo-Mid: 100 Hz - 1 kHz

Hi-Mid: 500 Hz - 5 kHz

Hi: 2 kHz - 20 kHz

Current: 65 mA, 7.3 VoltAmps

Input Impedance: 12K Ohms

Output Impedance: 300 Ohms Transformer Balanced


Fits: 2U EIA 19" Rack

Size: 19" X 3.5" X 12" Deep

Size (Boxed for Shipping): 21" X 9" X 15"

Actual Weight: 12.63 lbs

Shipping Weight: 16.1 lbs

(Specifications subject to change without notice)





R24 Manual