PA14, (unbalanced input)

PA14B, (balanced och unbalanced input)

Front PA14

Backside PA14B

2 x 25W OTL power amplifier with integrated volume control and input channel selector


10 times lower distortion than other OTL amplifier because of unique driver circuit. PA14 is an OTL amplifier that uses 2 6C33C tubes per channel that is driven by the unique to 25W ouput power. Även at 10W ouput power the distortion is less than 0.1%, a very good figure for a tube amplifier, at 1W distortion as low as 0.01%. Hum and noise have very low values as active noise reduction is used. 


PA14 has an integrated relay controlled volume control built with discrete resistors, and input selector with 4 inputs and one output to drive e.g. subwoofer. volume and input can be controlled by remote control 


The amplifier is built on a large PCB except for critical parts that are built using so called Point to Point, (PtP) technology, ceramic solder supports are used that can withstand 5kV.  The chassis is made of 10mm aluminium which gives extraordinary mechanical stability and completely remove vibration induced noise. 


We now have a variant of PA14, PA14B that is equipped with balanced input using XLR connectors and can also be used unbalanced through RCA phono connectors.


We can offer versions of PA14 and PA14B with higher output impedance if requested, as some speakers work better when driven by a higher impedance 




Output power                                   



Distortion at 1W                  

Distortion at 10W                 


Frequency response                  

Power bandwidth                  


Rise time                                    


Hume and noise                        


Output impedance                           


Volume control


Input connectors       PA14





Output connectors    PA14






Remote control function


Mains connector







25W in 8 ohm at less than 1% distortion

20W i 4 ohm at less than 1% distortion


< 0.01%

< 0.1%


 5 - 70kHz - 1dB

10 - 50kHz - 1dB


< 1us


< -100dBA


0.4ohm or 1.5ohm, (see text above)


64 steps                                    


Gold plated Phono, 4 inputs


Gold plated Phono, 2 inputs, 

balanced XLR 2 inputs


Gold plated Phono, 1 output, speaker


Gold plated Phono, 1 output

balanced XLR 1 output, speaker



Volume, input channel, mute


IEC320 with integrated mains switch and dual fuses


430 x 250 x 290 mm, (B x H x D)


21 kg
















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