Output transistors and current

[terentellie]

Hello everyone,

I am researching a multichannel with 2 mono's for my HT setup mating with a Marantz Preamp and some larger identical 4ohm speakers all around. Does anyone know how many output transistors per channel the XPA-5 and XPA-5 II has also the XPA-100 gen I and II? If someone could also tell me what amperage and voltage they are. I am replacing some modified Haflers and Adcoms and I want more transistors and current. The power-supply specs look promising and I also like the elegant design.

Thank you 

[leonski]

Go to 'PassDIY' and look at his scalable designs.  You'll need more powersupply as the number of output devices goes UP, but Pass designs with that in mind.  

[geebo]

Jul 30, 2013 17:42:58 GMT -5 terentellie said:

Hello everyone,

I am researching a multichannel with 2 mono's for my HT setup mating with a Marantz Preamp and some larger identical 4ohm speakers all around. Does anyone know how many output transistors per channel the XPA-5 and XPA-5 II has also the XPA-100 gen I and II? If someone could also tell me what amperage and voltage they are. I am replacing some modified Haflers and Adcoms and I want more transistors and current. The power-supply specs look promising and I also like the elegant design.

Thank you 

From the XPA-5 manual:

XPA‐5
Number of Channels: 5
Topology: Fully Discrete, Dual Differential, High Current, Short Signal Path Class A/B
Power output (all channels driven):
300 watts RMS @ 4 ohm (0.1% THD)
200 watts RMS @ 8 ohm (0.1% THD)
Power Band Response: 20 Hz to 20 kHz with less than .05db deviation at rated power
Broadband Frequency Response: (‐3db): 5Hz to 150kHz
Amplifier Gain: 32db
Signal to Noise Ratio 1 watt: >97db Full Power: >111db
Input Impedance:
Unbalanced – 23.5kohms
Balanced – 33kohms
Transformer Size: 1,200VA
Secondary Capacitance: 60,000uF
Output Devices: 6 per channel
Size: 17” W x 7.75” H x 19” D
Weight: 66 lbs (88 lbs boxed)