I'm getting close to purchasing my SR-009s. I have a pair of Musical Fidelity M-250s in my closet. They are very quiet 250 watt mono-blocks. Would it be ok to use them with the Woo Wee to power the SR-009s until I buy a dedicated amp? (The wait for the BHSE is 6-8 months.)
Here are the specs:
Output voltage, RMS 45 Volts 20Hz to 20kHz peak 127 Volts
Power output 250 Watts into 8 Ohms (24dBW) 450 Watts into 4 Ohms
Peak-to-peak output current 72 Amps
Damping factor 180
Output devices per channel 6
Total Harmonic Distortion + noise 0.006% at 1kHz up to 90% power, into 4 or 8 Ohms
Intermodulation distortion 0.004% at 12.5 Watts into 8 Ohms
Frequency response 20Hz to 20kHz ±0dB
10Hz to 100kHz +0 / -1.5dB
Audio gain 30dB (31.5 times) nominal
Input impedance 31K Ohm
Input sensitivity for full power output into 8 Ohms 1.42 Volts
Signal / noise ratio, reference full power output > 115dB “A”- weighted
Without any problem.
The voltage multiplier factor of the Wee transformers is 1:50
You could almost use your Musical Fidelity M-250 amplifier directly on the 009 by deleting (bypass) the two transformers 1:50 voltage of the Wee and keeping only the transformer providing bias voltage 580 Volt DC on the 5th slot of theStax headphone.
127 Volts output ( peak) will give level peak > 100 dB with a nominal sensitivity Stax headphone of 101 dB / 100 Volt RMS.