The
WT 30-II amplifier is the first device constructed in Amplifon Audio company, based
on triodes operating in the A-class. The leading idea during designing this
amplifier, was to construct a device with perfect sound features, but devoid of
typical limitations of electron-tube amplifiers.
Due to the
application of a durable and current-efficient double power-triodes 6N13C we
got the output power coming to 31 W in the A-class and a relatively high
resistance to a load changes. The low impedance of the power-triodes and the
modern deka-sectional triodal output-transformers secure for the wide transfer
band with the small extent dependent on the output power.
Very interesting is
the system of the power-tube polarization, securing for the direct quiescent
current of the power-tubes, independent from the strain ageing effect or from
the changes of the power voltage. Apart from its basic functions, this system secure
also for the lack of any regulations not only during the exploitation but also
during the tube's exchange.
Amplifon WT 30II Features:
Integrated electron-tube amplifier based only on tubes operating in
the pure A-class without returnable compression
Automatic regulation of the power-tubes' quiescent currents
Three linear inputs
Triodal input system on the 5963 Philips JAN tube (ECC82; 12AU7;
5814)
Triodal operating system on the 6N1P-EW tube
Push-pull output stage, based on the double triodes 6N13S (6AS7; 6080) operating in the A-class in the parallel
push-pull system
Deka-sectional triodal output transformers adapted to work with 4- i
8-ohm speakers groups
Completely separated rectifiers and power supplier's filters for the
left and the right channel
Automatic, delayed switching on of the anode voltage with 'Stand by'
function
SPECIFICATIONS:
Power
Output: 31 W RMS A-class
Frequency Response: 7 - 62,000Hz -3 dB
Distortions:
less than 0,2% (1W; 1kHz)
Input Impendance: 50 k Ω
Output Impendance: 4 Ω or 8 Ω
Input Sensivity: 270 mV
Signal-to-Noise Ratio: 89 dB
Power
Supply: AC 220 - 240 V, 50 Hz
Power Consumption: ~315 W
Dimensions
(W xH x D): 435 x 280 x 430 mm
Weight: 16,8
kg