Jeff Rowland Design Group 1 Manuel D’Utilisation

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