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QUALITON C200. Qualiton C200 tube preamplifier: Class A with MM phono pre-amp
The Qualiton C-200 is a Class A tube preamplifier with four unbalanced RCA line-level inputs, two balanced XLR inputs and a dedicated input for an MM phono preamp. Via the front-panel audio source selector, the user can choose from seven input options, adjust the volume and switch between RCA and XLR outputs via a relay system.
When the input selector is in the ‘P’ (PHONO) position, the signal being processed is fed directly into the first voltage amplifier valve via the RCA connectors labelled PHONO, ensuring the shortest possible signal path.
From this point, the signal passes to the second voltage amplifier stage via a passive correction system based on the RIAA standard, built exclusively with passive components.
The Qualiton C-200 incorporates a total of eight ECC83/12AX7 double triodes, which are used in both voltage amplifier stages and the phono preamp. Thanks to a suitable tuning circuit and a potentiometer for volume control, the output signal of the PHONO stage is routed to the LINE stage.
For added convenience, the C-200 includes an aluminium remote control for easy management of the volume level and selection of input sources.
Technical characteristics
Nominal Output Level - Line: 4V
Input Sensitivity – Line: 1 V, at nominal output level
Input Sensitivity – Phono: 5.7 mV, at nominal output level
Number of input ports per channel: 4 unbalanced line level inputs (LINE 1-4); 2 balanced line level inputs (BALANCED INPUTS 1-2); 1 PHONO level input (PHONO MM)
Number of output ports per channel: 2 unbalanced line level outputs (LINE; SUB); 1 balanced line level output (BALANCED OUTPUTS);
1 headphone output per channel
max. input signal - line: 10 V
max. input signal – Phono: 70 mV
Gain – Line: +12 dB
Gain – Phono: +57 dB
Total Harmonic Distortion – Line: < 0.05%, (f = 1 kHz)
Total Harmonic Distortion – Phono: < 0.1%, (f = 1 kHz)
Frequency response – Line: 4 Hz – 300 kHz, (-1 dB)
Frequency response – Phono: 20 Hz – 20 kHz, (-0.5 dB)
Input impedance – Line: 10 kOhm
Input Impedance - Phono: 47 kOhm
Signal to noise ratio – Line: > 100 dB
Signal to noise ratio – Phono: > 70 dB
Required tubes: 8 x ECC83/12AX7
Weight: 10.4kg
Dimensions: 43 x 40 x 16 cm
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