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Explains the extensive use of transformer coupling in the 912 design.
Describes the high-quality phono stage and its RIAA equalization network.
Details the main output circuit, transformer usage, and headroom considerations.
Explains the Mute switch and Metering function for operation.
Details MM/MC compatibility and MC input impedance selection.
Addresses DC offset and pseudo-balanced output issues with source components.
Advises on cable capacitance, screening, length, and balanced connections.
Details the steps for wiring up and the initial power-on sequence.
Explains checks for power switch, IEC plug, and mains fuse if issues arise.
Lists compatible valve types (PCC88/ECC88) and their replacement.
Warns against removing covers with power connected due to high internal voltages.
Details input/output types, line amp gain, and phono gain settings.
Outlines phono input impedance, overload margin, and RIAA accuracy.
Lists power consumption, weight, dimensions, and front panel facilities.
Inputs and Outputs| phono inputs | 2 x phono |
|---|---|
| line level unbalanced inputs | 3 x RCA phono connector |
| tape out | 2 x line level balanced (XLR connector) |
| tape monitor | 1 x tape monitor |
Amplifier Specifications| line amp gain | 14 dB |
|---|---|
| line amp signal-to-noise ratio | 90 dB (1V out ref) |
| distortion | Less than 0.1% at 1KHz 3V out |
Frequency and Output| frequency response | 20-20KHz + 0-0.3dB |
|---|---|
| max output | 6V 600Ω either output |
| RIAA accuracy | ±0.2dB, 30Hz – 20KHz |
Phono Section| input impedance MM | 47KΩ |
|---|---|
| overload margin on phono | 28 dB |
| MC selection | 40Ω, 12Ω, 6Ω, 3Ω |
Power and Dimensions| power consumption | 30 VA (100V, 117V or 230V country dependent) |
|---|---|
| weight | 13 kg |
| size | W= 19” Rack, H = 5¼”, D= 10½” (48.26cm x 13.3cm x 26.7cm) |
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