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API AUDIO SR24 Dual-Channel Parametric EQ

BH #APSR24 • MFR #SR24
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API AUDIO SR24 Dual-Channel Parametric EQ
Key Features
  • Based on APSI 562 EQ
  • 4 Bands of Parametric EQ Control
  • Continuously Variable Frequency and Gain
  • 12 dB of Boost or Cut per Band
Delivering classic analog equalizing based on the vintage model 562, the API Audio SR24 is a dual-channel, 4-band fully parametric EQ designed for standard equipment racks. With continuously variable frequency and gain control and up to 12 dB of boost or cut per band, this EQ allows for quick and precise sculpting of frequencies.
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API AUDIO SR24 Overview

Delivering classic analog equalizing based on the vintage model 562, the API Audio SR24 is a dual-channel, 4-band fully parametric EQ designed for standard equipment racks. With continuously variable frequency and gain control and up to 12 dB of boost or cut per band, this EQ allows for quick and precise sculpting of frequencies.

The SR24 sports fully balanced inputs and outputs, including XLR 3-pin and 1/4" TRS jacks, which support dual-mono or stereo processing. The outputs feature transformer balancing via API's custom output transformer. The circuitry supports massive headroom, up to +24 dB, allowing you to handle a wide range of signals in professional applications. Both channels are linked to the master on/off switch, and each channel has an independent EQ-In button, allowing you to use either or both channels at your leisure.

Historic EQ Circuitry
The SR24 circuit design is deeply rooted in API’s history. From the late 1970’s to the early 1980’s, an audio company called APSI manufactured consoles and equalizers. Their 562 module was a 4-band, fully parametric equalizer, which was designed by APSI and sold through API.

Over the last several decades, these EQ modules have remained a favorite among many studio engineers, but have become increasingly difficult to find. The SR24 is a faithfully re-engineered version of the original 562, offering the user two channels of classic analog EQ in one rackmount unit.

Four-Band EQ Control
The API SR24 contains two identical equalizer channels in one chassis, sharing a common on/off switch. The frequencies covered in each channel include:

  • 20 to 200 Hz
  • 100 Hz to 1 kHz
  • 500 Hz to 5 kHz
  • 2 kHz to 20 kHz

API AUDIO SR24 Specs

General
Input Impedance
12 Kilohms
Output Impedance
300 Ohms (Transformer Balanced)
Frequency Range
20 Hz to 20 kHz
Maximum Input Level
+23 dBu
THD + N
0.01%
Signal-to-Noise Ratio
-100 dB
Inputs/Outputs
Audio I/O
2x XLR 3-Pin Line Input (1 Stereo Pair, Balanced)
2x 1/4" TRS Line Input (1 Stereo Pair, Balanced)
2x XLR 3-Pin Line Output (1 Stereo Pair, Transformer Balanced)
2x 1/4" TRS Line Output (1 Stereo Pair, Transformer Balanced)
Power
Power Source
AC Input
AC Input Power
Changing Voltage Requires Manual Switching
115 to 230 VAC, 50 / 60 Hz
Power Consumption
10 W
Physical
Mounting
Front: 4x Standard Rack Screw
Color
Blue
Material of Construction
Metal
Dimensions
19 x 10 x 3.5" / 48.3 x 25.4 x 8.9 cm (2 RU)
Weight
13 lb / 5.9 kg
Packaging Info
Package Weight
14.33 lb
Box Dimensions (LxWxH)
21.1 x 14.7 x 8.7"

API AUDIO SR24 Reviews

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