does a subwoofer kill stereo sound?

Re: expanding soundstage.

I've heard the same effect, but not consistently. Most recently it's become quite apparent on Allen Toussaint's "The Bright Mississippi" which I believe - and I am speculating here - features a very large bass drum. With the subs on-line, the recorded acoutic sounds much larger when that drum is struck.

However, I rarely hear this type of dramatic evidence of this effect on most other recordings.

Marty

OhJoy,
Isn't bass mixed to mono below.....say 80hz?
Also:
Given that bass wavelengths are longer than the longest dimension of MOST rooms, I'd say a sub was not locatable, eyes closed.

In large rooms, this may change.

I suspect that alot of information regarding a venue's acoustic space is very low frequency info that you can't quite hear on an obviouos manner, but is notable by its absence. If I had to use a subwoofer, I would only do so with close to full-range, or full-range speakers over a very narrow span with a very x-ver in the 30-40hz range. The less you ask of a sub the better it will interate and add without subtraction.

Martykl...Actually, I hear it quite differently. If you have a system that can accurately reproduce the lowest frequencies accurately (I am not commenting on your system) you will clearly hear low end pitch differentiation on those very powerful low notes. This is clearly the work of the bass player. Yes the drummer's kick drum adds some concussion when appropriate, but those lows are clearly the work of the bassist. I further speculate, that it is an old Kay plywood bass that's been electrified, and plugged directly into the recording board. In the song "Day Dream", the bass starts the tune, and the drummer comes in a couple of measures later.

String,

I'm not sure that we're taliking about the same thing - but we might be. I'll go back and listen again, but I'm not necessarily talking about the lowest frequencies on the recording - rather a percussive sound (maybe +/- 50hz fundamental as a guess, but clearly below where a kick drum impacts) that seems to "bloom" when the subs are on.

OTOH, we might be talking about the same thing since, as I indicated in my OP I was speculating as to the source. I'll cue it up again and post back. Thanks for the insight.

Marty

Marty