On 10/21/04 18:33 ET, aychamo said...
The way things are, there isn't a really easy
way to mount or have center channel speakers where
they should be (and where they should be would
pretty much mean directly behind the projector
screen. Would this be a problem?
Screen manufacturers actually make perforated screens for just this purpose. Commercial movie theaters place the center behine the main screen. Note that you do need a perforated screen, a plain screen with center mounted behind it will not sound good. For info on perforated screens, I suggest the Stewart Filmscreen website.
http://www.stewartfilm.com/Currently, he has two speakers for the center
channel (??), and they are sitting right next
to the front left and right surround sound speakers.
Is this bad or is this ok?
This will not do what the center channel is meant to do. The center can be positioned above, below, or behind the screen. If above or below, be sure to tilt the speaker to result in the best imaging.
Also, the center channel speakers, as I said he
has two of them for the center channel, and they
are both ran off of a single speaker output on
the amp. (I mean, he has two black wires on one
terminal, and two red wires on the other terminal.)
This would be wired in parallel (I think?).
Is this bad, or is this ok? Can this cause the
amp to overheat?
Yes, they are wired in parallel. This will cause the impedance presented to the amp to be half the impedance of a single speaker. If your amp is capable of driving a 4 ohm load, and the speakers are 8 ohms, this will likely work without damage. If the speakers are 6 ohms, 2 in parallel is 3 ohms, and all but the best amps will start having problems. If the speakers are 4 ohms, the load presented to the amp is 2 ohms, yikes... I'd definitely fix in this case.
Lower speaker impedance will result in greater heating of the amplifier. Lower speaker impedance also means the amplifier has to have larger output capacitance to support the speakers. I'd check the impedance of your speakers (look at the manual) and the capability of your amp (look at the manual) to determine if this setup is ok.
