The Deuce and Solo products are used with combo amps and speaker cabinets in a wide variety of configurations, including all the standard configurations – one speaker, two speakers and four speakers. The CabMojo products are used with speaker cabinets, and the ComboMojo products are used with combo amps.
Solo
These products are used with a single load. If your cab or combo amp has multiple speakers, these speakers must first be hardwired using parallel and/or series connections to produce a single speaker network. Of course, speaker cabs and combo amps are usually pre-configured in precisely this way.
Deuce
The typical use of these products is with speaker cabs and combo amps with two speakers. More generally, they can be used with two speaker networks, a speaker network consisting of multiple speakers hardwired in parallel and/or series to create a single load. Most generally, they can be used with two loads, a load consisting of a speaker, speaker network, dummy load (power soak device), or any hardwired network of speakers and dummy loads.
For example, the Deuce products can be used with single speaker combo amps and speaker cabs by using a dummy load as the second “speaker”, for switchable attenuation capability, through the use of our Deuce dummy load kit.
The Deuce products can also be used with four speaker combo amps and speaker cabs by first hardwiring one pair of speakers, and then the other pair, to create two speaker networks. Or, the four speakers can be hardwired to create one speaker network, and a dummy load used as the second load.
The possibilities are almost endless. Feel free to contact us if you have a special application and would like assistance with thinking it through.
ToneDoctor recommends the use of two 8 ohm loads, which is of course translates to two 8 ohm speakers in the typical application to a two speaker combo amp or speaker cab. We also recommend amplifiers with a switchable output impedance selector, or multiple output jacks, which permit operation at 4, 8 and 16 ohms (all three).
The reason for these recommendations is straightforward: Two 8 ohm loads produce 16 ohms wired in series, and 4 ohms wired in parallel. Since the products allow ready selection of either load running individually in mono, both loads running individually in stereo, both loads running in parallel, and both loads running in series, with 8 ohm loads only standard aggregate loads of 4, 8 and 16 ohms are produced by the product. Furthermore, if the amplifier can be run at each of 4, 8 and 16 ohms, then it’s always possible to “match” the amplifier to the resulting aggregate load.
In summary, following the configuration recommendations ensures that you can use the full tonal variety and rig flexibility enabled by your ToneDoctor product without ever having to run the amplifier in a way where it’s “unmatched” to the aggregate load it sees.
Note that for a four speaker cabinet or combo amp with 16 ohm speakers, two 8 ohm speaker networks can be readily created by simply hardwiring pairs of speakers in parallel.
Many, many other configurations are workable, depending on the needs of the user, so it’s simply impossible for us to catalog all the possibilities here. Again, feel free to contact us if you have a special application and would like assistance in thinking it through.