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| i. 512C Preamplifier Specifications |
Rear Connector:
XLR MIC Input
Balanced 1/4" TRS LINE Input |
| Front Connector: HI-Z 1/4" Unbalanced Instrument Input (INST) |
Gain Range:
MIC: 14dB min. 68dB max.
INST: 14dB min. 50dB max. |
Maximum Input Levels:
MIC: +17dBu
LINE: +36dBu
INST: +17dBu |
Input Impedance:
MIC: 1500 Ohms
LINE: 120K Ohms
INST: 120K Ohms |
| Clipping Level: +30dBu |
| LED Peak Indication: +22dBu |
| Frequency Response: +0.3dB, -0.1dB, 30Hz to 20kHz |
| Signal to Noise Ratio: MIC:-116dB; INST:-102dB |
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| ii. 527A Compressor Specifications |
| Attack Times: 1 millisecond to 25 milliseconds (typical) |
| Release Times: 0.1 seconds to 3 seconds (typical) |
| Compression Ratios: 1:1 to ∞:1 |
| Threshold Control Range: +10dBu to -20dBu |
| Frequency Response: +/- 0.1dB 20Hz to 20kHz |
| Signal to Noise: -114dB, 20Hz to 20kHz, no compression |
| Metering: 10-segment red LED: Gain Reduction scale; -1dB to -24dB |
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| iii. 550A Equalizer Specifications |
| Insertion Loss: None (bridging) |
| Frequency Response (No equalization): ±0.2dB 20Hz to 20kHz |
| Signal to Noise: -111dB, 20Hz to 20kHz, no equalization |
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| iv. 325 Line-Driver Specifications |
| Output Fader Control Gain: -∞ to +10dB |
| Clipping Level: +30dBu |
| Channel Output: +4dBu, Balanced, Low-impedance, Male XLR |
| Output Impedance: Less than 75 Ohms, Transformer Balanced |
| Metering: 10-segment LED: dBu scale; -11dBu to +22dBu
Switchable between 512C Preamp and 325 Line-Driver outputs |
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| v. Misc |
| Nominal Mains Power Consumption: 16 watts |
| Fusing: 500mA Slow Blow |
| Mounting: Standard EIA rack ears |
| Cabling Depth From Mounting Surface: 13.5” |
| Weight: 10lb 10oz |
| Size: 19" x 11.5" x 1.7", L x W x H |
| Shipping Weight: 14lb 9oz |
| Shipping Size: 23.25" x 16" x 6.5", L x W x H |
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| API reserves the right to update or modify any specification listed herein. |
