Audio Engineering

Loudspeaker Enclosures 715





Input

Amplifier

Output

Speaker cable

High pass crossover

Low pass

crossover

Speaker enclosure

LF

HF

Figure 24.4 : Passively crossed over cabinet.

Otherwise, in ordinary “ mix and match ” sound systems, one problem arising is that
because the crossover is physically divorced from the speaker, careful connection
is needed. Another, less daunting, is that any existing, passive high-level crossover
component values cannot be simply transferred, as they will have been “ tweaked ” to best
suit the vagaries of the drive-units ’ impedances.









Low level

passive XOR

Line level

input

High pass

crossover

Low pass

crossover

Ground track (for clarity)

HF amplifier

LF amplifier

Speaker

cable

Speaker

cable

Speaker

cabinet

LF

HF

Figure 24.5 : Low-level passive.