PRE12B Buffer preamplifier (balanced inputs/output)

All tube buffer preamplifiers with low output impedance and very high transparency, 4 selectable inputs, relay switched volume control built with discrete resistors.

NOTE! all amplifier stage are 100% tube and OTL, no solid state components nor transformers or chokes are used in the audio chain.

Volume and input choice can be controlled by remote.

Advanced stabilised power supply, (anode och heater) give very low levels of hum and noise.

The amplifier is built on 3 PCBs, the chassis is made of 10mm aluminium which gives extraordinary mechanical stability and completely remove vibration induced noise.

PRE12 is a perfect fit with PA12 or PA34 OTL power amplifiers, the low distortion of PA12 and PA34 make it important to put high requirements of the preamplifier, PRE12 fulfills these goals and will not affect the crystal clear sound from PA12 or PA34. PRE12 is of course also a perfect choice in any other case where a very transparent preamplifier is desired.

We use a volume control built with discrete resistors in PRE14. We recognize that there are some good potentiometers available in the market but a discrete resistor base volume control can give better performance than any potentiometer and is impossible to beat. The volume control in PRE14 has 64 positions that are switched using relays with gold plated contacts, channel balance is within +-0.05dB at any volume setting.