Q-tron Audio PRE12B Tube Buffer Preamplifier

The PRE12 is an all-tube buffer preamplifier with low output impedance and very high transparency. It has four selectable inputs and a relay-switchable volume control consisting of discrete resistors. All amplification stages are 100% tube OTL designs, and no semiconductor components, transformers, or chokes are used in the audio configuration.

The selection of volume and input is controllable by remote control.

A highly regulated power supply for the anode and heater keeps hum and noise levels very low. The amplifier consists of three PCBs, and the chassis- Made of 10mm thick aluminium, it provides excellent mechanical stability and completely eliminates noise caused by vibrations.

The PRE12 is ideal to be combined with a PA12 or PA34 OTL power amplifier. In order to take full advantage of the low distortion performance of the PA12 and PA34, the preamplifier also has high demands, and the PRE12 meets these goals without compromising the crystal clear sound from the PA12 and PA34. Of course, if you need a highly transparent preamplifier for other systems, the PRE12 is the perfect choice.

The PRE12 uses Q-tron Audio's proprietary 64-step attenuator instead of a typical potentiometer for high-precision and reliable volume control. There are good potentiometers on the market, but our attenuators eliminate the channel-to-channel imbalance caused by potentiometers and provide better performance than any potentiometer.

The attenuator has 64 positions and allows adjustment in steps of 1 dB. Each step is precisely switched using a relay with gold-plated contacts, and the channel balance is accurate to within ±0.05 dB at any volume setting. It also boasts a very high accuracy of up to 0.02 dB to maximize audio clarity and dynamics. This design allows for smooth and precise volume adjustments, which can significantly improve the quality of the audio experience. Q-tron Audio's 64-step attenuator is the perfect choice for audiophiles looking for precision and sound quality that traditional products can't match.