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| Precision Fidelity C7a |
325,000yen(release time -unknown) |
Control amplifier which attained high-quality
sound-ization by elaborating a circuitry further based on C4.
The
circuit design has followed mostly the dual cascade connection adopted by the
previous work, and in order to perform the powering stabilized to the active
loading, a powerup and stabilization of the power-source part are attained.
Parts until it results in a detail are changed to a military-rules rank
or more highly efficient component partses. Moreover, the sorting article
is adopted as the thermionic tube.
|
| Form |
Control amplifier |
| <Phono section>
|
| Input impedance |
47kohm/50pF |
| Gain |
50dB(1kHz) |
| Maximum permissible input |
400mV (1kHz, peek)
3.7V (20kHz, peek) |
| THD |
0.01% or less (at the time of 1kHz and 5V
output) |
| S/N ratio |
73dB (at the time of a 10mV input)
|
| Slew rate |
60v/microsec. |
| <High-level part>
|
| Input impedance |
25kohm |
| Gain |
0dB |
| A low cut-off filter |
-3dB(12Hz) |
| <Synthesis>
|
| Output load impedance |
Tape out: 2kohm
Main out: 600ohm - 7kohm |
| Dimensions |
Front panel: Width 482x height 89x depth of
3.2mm
Main unit: Width 406x depth of 241mm |
| Weight |
Main unit: 3.6kg
At the time of an
original packaging: 4.5kg |
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