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PA34B 80W monoblock

 

PA34B is a monoblock amplifier with 80W output power. The circuit is based on the well known PA12 but modified in order to drive 4 output tubes. As the current drive capacity is twice compared to PA12, PA34 can be used to drive less efficient speakers

 

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. 

PA34 clips soft when max power is approached and even at 100W output power distortion is less than 3%. 

PA34B has balanced input with XLR connector and can also be used unbalanced by a parallel RCA phono input.  

80W in 8 ohm at less than 1% distortion

60W in 4 ohm at less than 1% distortion

 

< 0.01%

< 0.1%

 

 5 - 100kHz - 1dB

10 - 100kHz - 1dB

 

< 0.5us

 

< -100dBA

 

Factory selectable, 0.2 - 1.5ohm

 

XLR + RCA phono

 

275 x 400 x 290 mm, (B x H x D)

19kg

Performance:

 

Output power                               

                                              

 

Distortion at 2W                  

Distortion at 25W                 

 

Frequency response                  

Power bandwidth                   

 

Rise time                                    

 

Hum and noise                       

 

Output impedance

 

Input connectors                           

 

Dimensions                          

 

Weight