We love to make specials, as an example we have here a preamplifier with 4 independant channels. This preamplifier have an integrated volume control that adjust the 4 channels in parallel with a minimum of gain difference. 


PRE16 "Preben" has 4 RCA phono inputs per channel and 2 RCA phono outputs


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 using so called Point to Point, (PtP) technology, ceramic solder supports are used that can withstand 5kV. To use PtP is rather time consuming but make it easier to control crosstalk between signals especiallly in the high impedance circuits that are being used in tube amplifiers. The chassies is made of 10mm aluminium which gives extraordinary mechanical stability and completely remove vibration induced noise. 


We use a volume control built with discrete resistors in PRE16. We recognise that there are very good potentiometers available but for the ultimate performance a discrete resistor base volume control give better performance and is impossible to beat.  The volume control in PRE16 has 64 positions that are switched using relays with gold plated contacts. 


PRE16 is equipped with 6CG7 tubes, 6CG7 is a whole glass variant of the well known 6SN7 that is often praced for its sound qualities.







Channel balance






Harmonic  distortion, ()           


Frequency response


Hum and noise                                   


Volume control                                    


Mains voltage                                      


Power consumption                             




Input connectors     


Output connectors   


Mains connector


Remote control function


Tube complement                      





12dB, (4 times)


+- 0.05dB




300 ohm


<0.001% a 1kHz at 1V output


5 - 100kHz - 1dB


 <-100dBA at 1 V output


64 steps


230V ± 10%


100W max


430 x 370 x 110 mm,  (B x D x H) 


Gold plated phono 4 inputs


Gold plated phono 2 outputs


IEC320 with integrated power switch and dual fuses


Volume level, input channel, mute


4 6CG7, 2 6N6Pi



PRE16, "Preben"

Preamplifier with 4 channels

© 2017 by Q-tron Audio. All rights reserved.