What's a good servo based sub? Is this technology not expensive?
Someone mentioned James EMB1000 as a really good sub. Any idea as to who sells them and how much they costs?
/Nowadays the servo based subs are usually the active digital servos;
3rd party manufactures it and the sub makers just install them into
their subs; pretty much work the same way like any other subs.
There are however some sub specialists with their own versions
of servo controls with special or unique features, so may command
a slightly higher price point!
Servos up until now, is still not yet the domain of diyers, it's
something the diyers can't 'touch' yet, because of the hi-tech
involved, as some design are not standardised but proprietary!
These are usually the active type. However, there are several
passive type that are no longer in use except for the very hi-end
subs makers as it's no longer cost effective to do so. As the
manufacturing & installing is more labour intensive than
mechanical! This type of design is still accessible by diyers
and still a favourite amongst hifi enthusiasts as it's a minimalist
design and affect the sound very little. This is the type I installed
into my multiple subs, took quite a long while to do it.
The James subs has a good review, and users are happy with
the performance. By the way there are differences with the use
of just 1 sub for mono bass and 2 subs for left & right channel
used as stereo pair. Slightly different information in their output,
but if can't hear the difference then there isn't a need to do so.