I have either a subwoofer
or a woofer -- I'm not sure which -- in an enclosure where you can't see the speaker. At
the bottom there is a rectangular opening about 3" wide where all the bass comes out.
What type of enclosure is this and how is the subwoofer positioned in the enclosure?
...The Wrolsens
You probably have a woofer that the manufacturer calls
a subwoofer. Most don't really go way, way down in the bass. What you're describing is
called a "bandpass" enclosure, in which the sound emanates only from the vent,
and not from a speaker diaphragm radiating directly into the room. It's useful for
eliminating higher frequencies, which might make it possible to locate specific sounds at
the sub. How the speaker itself is oriented inside the box is pretty much irrelevant.
…Ian G. Masters
I have a two-year-old 4:3 rear-projection TV that is
non-digital. I want to upgrade my DVD player to a DVD-Audio player. Most of the
second-generation players seem to have progressive-scan capabilities. Is a
progressive-scan player something that would cause any degradation to my present picture?
Would I gain any benefit since my TV would have an interlaced rather than a
progressive-scan picture?
…Name withheld
One useful thing about something like progressive scan
is that you don't have to use it. By keeping it switched off, your new DVD player will
work as well with your present set as any player. The advantage will be that, when you do
upgrade to a digital set, you'll already have the player to feed it the higher-quality
signal.
…Ian G. Masters
I have recently purchased a DVD player that plays karaoke
discs. It works fine, but I have a problem with feedback when I use it. I know it is not
doing my speakers any good. Do you know of any component that would help eliminate the
feedback?. Also, how will the use of the karaoke machine affect my speakers? Even if I
eliminate the feedback will there be any negative effects on my speakers?
…Tino
I don't know of any such device, but you're right that
feedback might well damage your speakers, the tweeters especially. Even if that doesn't
happen, it can be excruciating to hear. The best ways to avoid it are to keep the level
fairly low, to keep the microphone as far away from the speakers as possible, and if those
don't work, buy a directional microphone and keep the "dead spot" aimed at the
speakers. Otherwise, you're only likely to damage your speakers if you crank the level to
the point you blow out the voice coils or fry them by driving the amp into constant
clipping.
…Ian G. Masters
I was interested in your review of the Axiom M3Ti. I would
like to order these speakers but I have a small problem: They have to be placed on
built-in oak bookshelves which are only 8.75" deep. The Axiom website states that
only 1.5" from the back wall is required for these rear-firing speakers. This means I
could let them overhang the shelf by l.25" to meet this requirement. Other speaker
sites have indicated that a distance of at least 6" is required between the back wall
and a rear-firing speaker. May I please have your experienced advice about this situation
as I would like to make these speakers the fronts of a home-theater system.
…Cheryl
Trust the guys at Axiom -- your overhanging solution
should work fine. What's on the back is not a speaker but a port, and as long as you don't
block it entirely, you should have no problem.
…Ian G. Masters
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