Our Deuce Dummy Load kit provides a low cost, simply installed, specially configured dummy load to be used as one of the two loads switched by the Deuce, or in conjunction with one of the two speaker loads switched by the Deuce.
In the first arrangement, this provides two distinct attenuation modes in addition to the normal mode of running the full (hardwired) speaker load: 1) dummy load in parallel with speaker load and 2) dummy load is series with speaker load. It also provides a silent mode (dummy load alone) wherein the amp output is loaded, but produces no sound, which is especially useful for technician troubleshooting of the amp. In this arrangement, typically the dummy load and speaker load are selected to have identical 8 ohm impedances, in which case both the attenuation modes are half-power modes, with distinctly different tonal characteristics, owing to the effect of the virtual impedance formed by the mismatch of the two loads.
In the second arrangement, the dummy load is hardwired with a speaker load (A) to form one of the two loads switched by the Deuce, with another speaker load (B) providing the other load to be switched by the Deuce. This provides three distinct attenuation modes in addition to the un-attenuated mode of operation involving speaker load B alone: 1) dummy/speaker load A alone, 2) dummy/speaker load A in parallel with speaker load B, and 3) dummy/speaker load A in series with speaker load B. In this arrangement, typically the dummy load and speaker load A are selected to have identical 16 ohm impedances, and are hardwired in parallel for an 8 ohm total load, with speaker load B selected to have 8 ohm impedance. In this case, attenuation mode 1 is a half-power mode, and attenuation modes 2 and 3 are 3/4 power modes with distinctly different tonal characteristics, owing to the effect of the virtual impedance formed by the mismatch of the two loads.
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