Audio characteristics

AN2583

12/18

and

Equation 2

Thus, bridging has the effect of doubling the load voltage without adding or changing the

voltage supply. In this example, the two amplifiers bridged together were each single supply

devices, but dual-supply amplifiers such as that in Figure 10 can also be bridged. The result

will be the same - the deliverable load voltage will be double that of using a single amplifier.

2.2.5

Bridged power

maximum continuous power is then

This is the same power as for the case of the dual-supply amplifier in Figure 10, and four

times the power of that in Figure 7. By bridging two single-supply amplifiers, four times the

power is available without the added cost of a second power supply. Hence, bridging is an

economical and popular way of increasing amplifier power without expensive power

supplies.

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