Heritage Audio 2264JR

The Heritage Audio 2264JR is a 2-slot 500 series compressor and microphone preamplifier, based on the classic diode bridge principle. Its compression features, key components and design are the same found on the Heritage Audio classic 2264E compressor. A fully featured 60 dB HA1073 mic preamplifier has been implemented when compression is not needed. Phantom power is also available.

Its audio path is fully discrete Class A, 2n3055 driven, transformer balanced. All controls are stepped on rotary switches for easy recall and high precision. A high pass filter has been added on the sidechain to avoid bass signals to ride the compression. It features discrete inputs for Compression / Line amp (Left slot input) and mic (Right slot input). Output in both cases is on the left slot output.

• Gain Reduction meter: Shows the compression amount up to 20 dB
• Limit switch: Enables limit function
• Compress switch: Enables compression and gain makeup functions
• Limit recovery switch: Switches between 6 time constant options; 50ms, 100ms, 200ms, 800ms, Auto1 (100ms on peaks, 2secs on program material) and Auto2 (50ms on peaks, 5secs on program)
• Limit Level Stepped control: Sets the level at what limit begins, from +15 dBm down to +4 dBm in 0.5 dB steps)
• Compress recovery switch: Switches between 6 time constant options; 100ms, 400ms, 800ms, 1500ms, Auto1 (100ms on peaks, 2secs on program material) and Auto2 (50ms on peaks, 5secs on program)
• Compress Threshold Stepped control: Sets the minimum level at what compression happens, from +10 dBm down to -20 dBm in 2 dB steps)
• Compress Ratio Switch: Allows the user to choose between 5 different compression ratios, 1.5" 2, 3, 4and 6:1
• Gain Makeup Stepped control: In 2 dB steps from 0 to 20 dB
• Bypass switch: Switches the module in/out of the signal path
• IND switch: Allows the module to be linked to Buss A, Buss B, or independen.

• Line input impedance: 10 kOhms bridging, transformer balanced and
• floating.
• Output impedance: Less than 75 Ohms, transformer balanced and floating, to drive a load of 600 Ohms.
• Maximum output: Greater than +26 dBm into 600 Ohms, greater than
• +32dBu into 10 kOhms
• THD: Less than 0.025% at 1 khz, less than 0.05% at 100 Hz
• Frequency response: 20 Hz (+0.3dB) to 20 khz (-0.2 dB)
• Maximum Gain: 20 dB
• Noise: Less than -90 dBm when gain makeup set to 0 dB
• Power consumption: 112 mA @24 VDC