How to set the Speaker Load switch when the Model 2125 v.2 is configured for Bridged Mono operation:
Single 8 Ohm Speaker
In this case the Speaker Load switch should be set to
Single 4 or 6 Ohm Speaker
In this case the Speaker Load switch must be set to
Two 8 Ohm Speakers
In this case the Speaker Load switch must be set to
Note: Never connect two 4 ohm speakers for bridged mono operation. This results in a 1 ohm load on each channel which could cause the amp to overheat and shut down.
Bi-Amping Using Two Model 2125 v.2 Amplifiers
If your speakers have separate input terminals for their Low and High frequencies there is usually a greater sonic advantage using two Model 2125 v.2 amplifiers to
When set up for
A + B Speaker Load Switch
The Speaker Load switch gives the Model 2125 the flexibility to drive very low impedance loads. Such situations can occur when the Model 2125 is asked to drive multiple pairs of speakers.
For a single pair of 4 ohm or 8 ohm speakers the Speaker Load switch may be set to its
These are examples that require the 2-3 Ω setting:
1.Driving two pairs of speakers whose impedances are unknown.
2.Driving two pairs of speakers whose impedances are each lower than 8 ohms. For example, two pairs of 4 ohm speakers driven simultaneously = 2 ohm load.
3.Driving three pairs of 8 ohms speakers simultaneously = 2 .66 ohm load.
4.Driving a single 4 ohm speaker in Bridged Mono operation = 2 ohm load
5.Driving two 8 ohm speakers in Bridged Mono operation = 2 ohm load
Note: For the coolest possible operating temperature we recommend setting the Speaker Load switch to
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