The line amplifier works for the amplification and the impedance decrease necessary to connect a source to a power amplifier.
Each channel is made up of 3 triode tubes ( 1/2 12AT7 , ECC81 , 6201 ).
The first stage wired in cathode follower gives a large input impedance and modulate the second stage wired in µ follower which gives the amplification and the low output impedance . The absolute phasis is observed. The gain is foregone for 0 , 6 , 10 , 14 and 20dB.
The phono amplifier is ingeneered to realize the deamphasis according to the RIAA norm and the very important amplification enough for the moving magnet cartridges - 2 transformers with µ metal magnetic circuit allow the using of moving coil cartridges-
Each channel is made up of 3 triode tubes ( 1/2 12AX7 , ECC83 , 7025 ) with very low noise and very low microphonia. The first stage wired classical manner with a metal resistor in an anodical circuit strikes up a second stage wired in p follower, that last sends back in feedback by a RC filter a part of the signal in the first stage cathod and gives the RIAA correction respected untill 20 Hz as shown on the following curve. The absolute phasis is observed.
Designed very carefully around original diagrams and scrupulously produced, we are certain that our new preamplifier CONTROL " B " will be classified soon among the best available products, without regarding on the sale price which stays reasonable.