Jeff Rowland Design Group 1 - Manual (Page 6)

1. Check the rail fuses; on the Model 1, these are located on the inside of the amp
adjacent to the encapsulated transformer. A fuse can often look good even if it is
actually bad. If possible, check the fuses with a meter.
2. If the fuses are good, disconnect the inputs from the amp and see if it will power up
again. Your amplifier will generally only shut down if it senses DC, thus protecting your
speakers. Certain associated equipment can occasionally pass DC.
If the above suggestions do not work or you are having other problems,
please contact your Jeff Rowland Design Group dealer.
Technical Specifications
Model 1
Output power
60 watts RMS continuous, 8 ohms
120 watts RMS continuous, 4 ohms
215 watts RMS continuous, 2 ohms
Power Bandwidth 0.3 Hz to 300 kHz, -3 dB
Slew Rate 70 volts per microsecond
THD and Noise
Less than .025%, 1 kHz, 8 ohms, 20 watts
Less than .035%, 1 kHz, 8 ohms, 60 watts
Damping Factor
Greater than 200, 20 Hz to 20 kHz, 8 ohms
Greater than 85 100 kHz, 8 ohms
Output Current
22 amps peak, continuous
55 amps peak, 0.1 ohm, 20 msec, 1 kHz
Overall Gain Selectable: 20, 26, 29.5, 32 dB
Sensitivity 136 mV, 1 watt, 8 ohms
Input Impedance Selectable: 100k, 20k, 600 ohms
Common Mode Rejection Ratio Greater than 90 dB