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Positioning a sub near a RPTV.


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7 replies to this topic

#1 of 8 Jeramy_K

Jeramy_K

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Posted February 04 2003 - 03:43 AM

Is there anything to consider when placing a subwoofer close to a RPTV. Meaning less than 3ft or so ? My concern is possible damage or problems with the RPTV. Anyone have any suggestions or input ? If need be I can move the sub to another side of the room but for a matter of convenience I'd like to keep the sub on the same side of the room as the front speakers and TV.

Thanks,
Jeramy

#2 of 8 Joe Becker

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Posted February 04 2003 - 04:14 AM

I'd say no problem at 3'. My sub is that close to my RPTV. In a previous HT setup, I placed the 32" direct view TV 6 inches above the sub without any effect. Some subs may be shielded, some not, but 3' should be safe.

#3 of 8 Doug_B

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Posted February 04 2003 - 04:28 AM

For an unshielded driver, 3' is generally OK. You should be able to see any detrimental effects to the image if there is any magnetic effect.

As to vibration issues, I'm not sure that proximity is a determining factor. The sub specs, volume level, placement of the sub and TV, and room acoustics combine to determine what amplitude hits the TV (or parts of the TV) for each frequency. Parts of the TV may be susceptible to vibration (i.e., resonance) at certain frequencies and amplitudes. I would guess that for most HT cases, such effects are minimal. I'd be interested in hearing war stories of such an effect, though.

Doug

#4 of 8 Jeramy_K

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Posted February 04 2003 - 04:46 AM

I guess my biggest concern is related to internal alignments, etc. of the RPTV. Wouldn't want to have a good calibration performed only to find that the sub is knocking off the alignment.

-Jeramy

#5 of 8 Shawn O

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Posted February 04 2003 - 09:23 AM

I had a pw-2200 sitting about 1/2 an inch to the side of a 61" rptv.If I played at high volumes(usually every weekend) for an hour or longer I would have to re-converge.

Since then I've moved the sub to the back of the room and convergence has remained stable.

#6 of 8 Steve Schaffer

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Posted February 04 2003 - 12:25 PM

I have a Klipsch KSW-12 sitting right next to a Sony KP57HW-40 for over a year with no problems. I was adjusting bass peak level on my new receiver a while back and actually got the tv screen to visibly vibrate, but it didn't affect the convergence, nor have I had any magnetic effects. I've watched Blade II and Matrix several times with bass heavy enough to cause my room's walls to vibrate and provoke cracking noises from the ceiling, but it never bothered the tv.

Same sub sat next to an analog 53" Hitachi for a year, no problems.
Steve S.
I prefer not to push the subwoofers until they're properly run in.

#7 of 8 ManW_TheUncool

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Posted February 05 2003 - 07:04 PM

Quote:
with bass heavy enough to cause my room's walls to vibrate and provoke cracking noises from the ceiling, but it never bothered the tv

Hmmm... At that point, I'd worry more about getting kicked out of the neighborhood than my TV's convergence. Posted Image

_Man_
Just another amateur learning to paint w/ "the light of the world".

"Whatever is true, whatever is honorable, whatever is right, whatever is pure, whatever is lovely, whatever is of good repute, if there is any excellence and if anything worthy of praise, dwell on these things..." (St. Paul)

#8 of 8 Michael St. Clair

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Posted February 06 2003 - 02:55 AM

A 25" direct-view set is more affected by magnetics than an RPTV is. The latter has 7" guns. The larger the CRT, the more magnetism effects it.