05-10-2018, 04:35 PM
You'll lose up to three-quarters of the output power in that resistor, so it won't be very loud!
Try comparing the output stage with other sets of any make that use the same output transistors and see what speaker impedance they used. It might just be a case of beefing up the heat-sinks to cope with the increased dissipation.
An alternative to your idea of slugging the output by increasing the load impedance might be to add a preset pot after the volume control. You can use it to limit the maximum volume - and hence output power - to a suitable level.
Try comparing the output stage with other sets of any make that use the same output transistors and see what speaker impedance they used. It might just be a case of beefing up the heat-sinks to cope with the increased dissipation.
An alternative to your idea of slugging the output by increasing the load impedance might be to add a preset pot after the volume control. You can use it to limit the maximum volume - and hence output power - to a suitable level.
