There's more than one way to do this.
If a solid state amp, and not a bridged output, then the first technique mentioned above will work. If a bridged output is employed I don't recommend it as the amp can be damaged.
If a tube amp with a grounded output, a Y adapter is installed at the input to drive both channels mono, and then a pair of jumpers on the output (one between the 16 ohm taps of the output transformer and the other between the Common connections) can be installed. At that point whatever your speaker load is, the amp output is half the impedance it was before, so if you have an 8 ohm speaker you use the 16 ohm taps, if a 4 ohm speaker you use the 8 ohm taps (and a jumper between the two is handy).
This will double the output power.
Our amps can be monostrapped too, despite having a bridged output. The technique is similar to above. The output power depends on the amp, but in the case of our smallest amp, the output power triples.
In all cases, don't expect the sound to be the same. Quite often it is degraded somewhat, so listen to the setup before committing to it- you may not like what you hear. Some cases it gets better....
If a solid state amp, and not a bridged output, then the first technique mentioned above will work. If a bridged output is employed I don't recommend it as the amp can be damaged.
If a tube amp with a grounded output, a Y adapter is installed at the input to drive both channels mono, and then a pair of jumpers on the output (one between the 16 ohm taps of the output transformer and the other between the Common connections) can be installed. At that point whatever your speaker load is, the amp output is half the impedance it was before, so if you have an 8 ohm speaker you use the 16 ohm taps, if a 4 ohm speaker you use the 8 ohm taps (and a jumper between the two is handy).
This will double the output power.
Our amps can be monostrapped too, despite having a bridged output. The technique is similar to above. The output power depends on the amp, but in the case of our smallest amp, the output power triples.
In all cases, don't expect the sound to be the same. Quite often it is degraded somewhat, so listen to the setup before committing to it- you may not like what you hear. Some cases it gets better....