PLD Series Amplifiers 13
Application Guide—Portable PA Rev. E, Apr. 2015
Connecting additional parallel identical batteries or amp channels increases the ca-
pacity for delivering current proportionally, up to the limits of what the power supply
can provide. Even all four channels of a PLD amp can be put in parallel, where they
can drive a load impedance as low as 1Ω!
Two identical voltage sources in parallel,
however, double the available current.
In PLD amplifiers, parallel is suitable for load
impedances of 2 to 4Ω.
Paralleling three or four amp
channels triples or quadruples
the available current, respectively,
but does not increase available
voltage.
In PLD amplifiers, this technique
can be used for driving extremely
low load impedances of 1 to 2Ω.
Parallel
Doubling up in parallel, instead of series, doubles the current capacity but keeps the voltage the same as with a single
battery or amp channel. This is useful for higher-power but low-resistance or low-impedance loads.
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