"Jim Lesurf" wrote in message
...
In article , Serge Auckland
wrote:


Crossover design has normally nothing to do with bass extension. The
bottom end of a passive loudspeaker's response is left to roll off
naturally, the frequency at which it does so is a function of driver
and cabinet.

IIUC Some loudspeakers use a large capacitor in series with the LF unit to
alter the low frequency behaviour and interaction with the cabinet
effects.
I think KEF did this with various speakers, but I don't know how
widespread
the practice may be.

Slainte,

Jim


I haven't come across this at all, so I don't think the practice can have
been very widespread. Of course, before split power supplies were common,
solid-state power amps had a large capacitor in series with the output, but
that was for DC blocking reasons. I can't imagine why a loudspeaker
manufacturer would deliberately roll off the extreme LF, unless it was for
power-handling reasons at the time when the main source was LPs and
consequently there could be a lot of subsonic energy due to warps and the
like.

S.


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