Bose 1801 Service Manual

24
VOLTAGE CONVERSION INSTRUCTIONS
1. Perform Top Cover removal procedures for the model amplifier your going to convert.
2. Refer to the figures below for the voltage conversion being performed.
3. On the 1801 when converting to 110 volts remove the in-line resistor found wired to the
thermal cutoff indicator. Connect the wire directly. For 220 voltage conversion connect a
56k ohm 1/2 Watt resistor directly to the thermal cutoff indicator terminal.
4. Use an MDL 10 amp fuse for 110 volt operation.
5. Use an MDL 5 amp fuse for 220 volt operation.
NOTE: FOR 220 VOLT AC USERS ONLY
For 110 volt operation of the accessory outlet, move the wire labeled "TO RECEPTACLE"
from transformer connector #4 to connector #2. The amplifier will operate on 220 volts
and provide 110 volts to the accessory outlet (up to a maximum of 3 amps).

Bose 1801 Specifications

General

Power Output	250 watts per channel into 8Ω (stereo)
Frequency Response	20Hz to 20kHz
Damping Factor	200
Input Sensitivity	1.5V
Speaker Load Impedance	4Ω to 8Ω
Total Harmonic Distortion	0.5%