Jbl MPC Manuel d'utilisateur télécharger pdf (Page 13)

Low Impedance Bridged Mono

ApplicationsThe bridged mono mode produces higher output voltages with the trade-off

of requiring a higher impedance load and providing a slightly lower damping factor. Never-

theless, it is an effective way of providing very high power levels to loudspeakers such as 4Ω

or 8Ω subwoofers.

Minimum ImpedanceThe bridged mono configuration places the two channels of the

amplifier in series with each other. As such, each channel is seeing half the total load imped-

ance. For example, connecting a 4Ω speaker in bridged mono results in each amp channel

seeing a 2Ω load. Since each channel individually is capable of driving a 2Ω minimum

impedance, a bridged mono MPC amplifier requires a 4

ΩΩ

Ω

minimum impedance.

Power Drive CapabilitiesThe table below shows the low impedance power drive capabilities

into 4Ω and 8Ω loads of the MPC amplifiers in bridged mono mode:

Model Minimum Load Power Into 8

Ω

Power Into 4

Ω

Power Into 2

Ω

MPC200 & 200T 4Ω 450 Watts 700 Watts DO

MPC300 & 300T 4Ω 600 Watts 900 Watts NOT

MPC600 & 600T 4Ω 1200 Watts 1800 Watts USE

High Impedance Bridged Mono

Distributed System Bridged Mono ApplicationsPlacing the T models in bridged

mono mode permits higher drive voltages (140V and 200V) for reducing the effect of cable

resistance when driving extremely long loudspeaker lines. The loudspeakers and speaker

transformers connected to these lines must be capable of handling these higher voltages, and

the speaker cabling itself may be subject to special local or national safety code requirements.

Parallel Mono Configuration

The Parallel mode ties the two channel inputs together so that both are driven by the same

signal, without the need for external jumpers or wiring. After the inputs, both channels operate

independently. Though they carry the same signal, their gain controls affect only their

respective channels, and they must use separate speakers. Never parallel the speaker

outputs!

Only the models MPC300, 300T, 600, and 600T feature a mode switch; to place any of these

in parallel mode, set the switch to the Parallel position. To feed the same input signal to the

two channel inputs on models MPC200 and 200T, simply use jumper wires on the Euroblock

barrier strip input connector to parallel the two channel inputs: + to + and - to -.

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Jbl MPC Manuel d'utilisateur Page 13