Audio Database

CL35
Commentary

This preamp was created by thoroughly reexamining the PL45 type that was announced as the last preamp of the vacuum tube.
The results of analysis of famous products from overseas are incorporated into the finished product to further enhance the completeness.

The equalizer circuit is a 3-stage K-KNF type (NF is applied from cathode to cathode).
This configuration is also used in the Marantz Model 7, and the CL35 has improved input resistance.

For the tone control, NF type of LUX method is adopted, and the bending point can be switched in 3 places of high and low.
The tone control can be skipped with the defeat switch.

The filter has 2 high-cut and 2 low-cut levels.

The output stage uses a cathode follower circuit, making it a stable circuit with low output impedance and less susceptible to fluctuations in the power supply voltage.

Equipped with a socket for step-up transformer and compatible with MC cartridge.

All of the CRs used inside are mounted on the printed circuit board, and the layout is symmetrical with the independent boards for each channel.
In addition, vacuum tubes can be easily inserted and removed simply by removing the rear protective board.

Model Rating
Type Tube type control amplifier
Frequency characteristic 10 Hz to 30,000 kHz ± 0.5 dB or less
Total harmonic distortion factor 0.08% or Less (at Output Voltage 2 V)
Output Voltage (1 kHz) Rating : 2 V (Distortion Factor : 0.05% or Less)
Maximum : 20 V (Distortion Factor : 0.3% or Less)
Input sensitivity (at 1 V output) Phono1, 2 : 1.3 mV
AUX1, 3 : 130 mV or more
AUX2, Monitor : 130 mv
MIC:0.6mV
Center MIC:0.8mV
Input impedance Phono1 : 100k Ω, 50k Ω, 30k Ω
Phono2 : 50k Ω
AUX1, 3, Monitor : 110k Ω
AUX2 : 200k Ω
MIC : 33k Ω
Center MIC : 75k Ω
SN ratio (output regulator center, input short)
Uncorrected : Phono1, 2 : 64 dB or more
AUX1, 2, 3, Monitor : 77 dB or more
MIC, Center MIC : ≥ 56 dB
IHF-A Correction : Phono1, 2 : 75 dB or more
AUX1, 2, 3, Monitor : 85 dB or more
MIC, Center MIC : ≥ 63 dB
Equalizer RIAA deviation within ± 0.3 dB
Tone control LUX System NF Type with Bending Point Switching
Low-pass curve point : 150 Hz, 300 Hz, 600 Hz
High-frequency bending point : 1.5 kHz, 3 kHz, 6 kHz
With Defeat Switch
Filter Low Cut : 30 Hz, 70 Hz (-12dB/oct.)
High Cut : 5 kHz, 9 kHz (-12dB/oct.)
Attachment Tape monitor switches and terminals
AC outlet
Booster transformer insertion socket
Semiconductors used
Vacuum Tubes (7 pcs) 12AX7 : 5
12AU7 : 2 Pieces
Diode (8 pcs) DS16A : 4
DS16C : 4
Power supply voltage 100 VAC, 50Hz/60Hz
Power consumption 30W
External dimensions Width 476x Height 190x Depth 275 mm
Weight 12kg