Servo controlled speakers and subwoofers

Beemer is exactly correct, and thus unfortunatley has to reveal he's over 60? if he remembers the IRD Beta problems. I even remember the Infinity Servo-Static! which had similar problems, but was a 'killer' product in its time!

Today, the long control cord problem has been solved by simply including a dedicated SS amp within the sub. Personally, I wouldn't buy a sub without a servo (accelerometer) it solves so many problems, though not a substitute for cheap construction/drivers.

...thanks for your explanations Eldartford and Beemer.

Why are the amplifiers that come with the 4 chassis systems so small in comparison to other amps that have to drive big speakers? The Genesis 201 bass columns have eight 8" woofers per column and both are run by one amp that doesn't seem all that big. Does the accelerometer lessen the power requirements of an amplifier?

Nsgarch, what are those colums with 5 woofers per side in your system? Do you use a servo to drive those giants?

Mitch, actually, I don't use those SW-800s (Kinergetics) anymore. I use a single Martin Logan Depth and it's great (it does use a servo, BTW) Sorry about the outdated pic. That's one of my spring projects.

Most on-board sub amps are I believe Class D "switching" amps. They're designed to only drive the lowest couple of octaves. I'm not clear on why, but they don't require big power supply transformers or storage capacitors.

You still need a "regular" Class A or A-B amp for the mid/highs, although there are now some alternates to those as well.

Nsgarsh,I'm well under 60,and owned IRS-Betas for a couple of years.I loved them.My neighbors did not!!
BTW my 57th birthday is today!March 29th.

Best!