The Heritage Audio '73 Junior is a preamplifier module designed for the API 500 series lunchbox. It features an input impedance of 1200 Ω minimum for microphone and 300 Ω minimum for line, with a bridging, Carnhill transformer balanced and floating DI impedance greater than 2 MΩ. The output impedance is less than 75 Ω, suitable for driving a 600 Ω load. Maximum output is greater than +26 dBm into 600 Ω. Total harmonic distortion is less than 0.025% at 1,000 Hz and less than 0.05% at 100 Hz. Frequency response ranges from 20 Hz (+0.3 dB) to 20,000 Hz (-0.2 dB). Maximum gain is slightly greater than 80 dB. Noise level is less than -100 dBm. Power consumption is 88 mA per rail at ±16 VDC. Dimensions are 1.50 x 6.89 x 5.32" (3.81 x 17.5 x 13.5 cm). Weight is 1.3 lb (0.6 kg). Package weight is 2.85 lb. Box dimensions (LxWxH) are 10.5 x 8.3 x 4.1".
- Input Impedance: Microphone HI: 1200 Ω minimum LO: 300 Ω minimum Line: 10 kΩ bridging, Carnhill transformer balanced and floating DI: Greater than 2 MΩ, unbalanced
- Output Impedance: Less than 75 Ω, Transformer balanced and floating to drive a load of 600 Ω
- Maximum Output: Greater than +26 dBm into 600 Ω
- THD: Less than 0.025% at 1,000 Hz Less than 0.05% at 100 Hz
- Frequency Response: 20 Hz (+0.3 dB) to 20,000 Hz (-0.2 dB)
Specifications
Technical
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