CurtPalme.com Home Theater Forum

[benareeno]

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I guess they're all important, but I'm thinking the one behind the blue tube which throws air over the video input board is the one that could be sacrificed...I mean, if I absolutely had to pick one fan to move slower...would you suggest it be that one?

Ben

[CasetheCorvetteman]

I dont understand... Why oh why do you have such an obsession with slowing fans down? Get over it for god sake, they are not that loud, just forget about it and when youre watching a movie there is no way youll hear them. If you do and it bothers you, youre too sensitive about something of almost zero importance.

If youre trying to cut down the VERY LITTLE amount of noise that a projector makes by cutting air flow that is meant to keep it cool, get yourself some earmuffs or some 6 speaker headphones. Cut the f****en blades off the barstards if it bothers you so much!!!

They are there for a reason. Manufacturers didnt put fans there cause they thought they would look and sound good, they put them there to prevent premature failure after the original purchaser spent many thousands of dollars on their product.

Why dont you buy an LCD flat screen if silence is your goal? That is your best option, they dont have fans, they dont make noise, and they dont need mods to be silent.

Final question here is do you want your projector to work or dont you? From looking at your recent threads i dont think youre in any sort of place to be pulling out critical components.

[barcoed]

If anything a G70 needs more cooling not less. I wouldn't fiddle.

[benareeno]

for the last f'ing time...I know it will likely reduce the life of the projector, and I don't care.

THere have been examples of many who have done it and run the projector for several years after...I probably would watch 5 hours a month on this thing. SO STOP TELLING ME NOT TO FIDDLE WITH THE F'ING FANS!!! If that's all you will add, then I don't want your input.

[macgyver655]

Ahhhhhhh....now I feel better.....

[VideoGrabber]

benareeno asked:
> I guess they're all important, but I'm thinking the one behind the blue tube which throws air over the video input board is the one that could be sacrificed...I mean, if I absolutely had to pick one fan to move slower...would you suggest it be that one? <

Hey, Ben. I'm not going to tell you not to do this, but I did want to share some experiences with you from my attempts to quiet a few HTPCs I've built.

Frequently (unless there's some issue like noisy bearing problems), the noise that you notice will be mostly from whichever fan is loudest. Remove that (or quiet it down) and now you don't hear it, but the next loudest fan becomes the issue. I just wanted to mention this because unless the fan you're thinking of sacrificing IS the loudest one, if you reduce it, or even eliminate it completely, you may notice little or no change in perceived noise levels. Just something to keep in mind.

This may already have been asked & answered, but is a hushbox out of the question? They're not that hard to build, and Kal and others really appreciate theirs. The main question is usually whether you have any place to evacuate the heated air.

One other thought that comes to mind is how do you have your PJ mounted? I.e., on the ceiling, near a back wall, etc. Sometimes you can significantly reduce the amplitude of the noise that reaches the listening position, by absorbing or diffusing the noise emitted from the PJ. I.e., perhaps some sound panels above, behind, or whatever your PJ may reduce the noise to a level that's more tolerable for you. Or, even if you can't do a hushbox, possibly installing a decorative sound panel below the PJ (wider and longer), between you and it, may help diffuse and scatter the noise. Of course, that depends on the height, and it may already be too low for that to be an option. However, treatments could potentially be very effective, and not necessarily overly expensive.

Just trying to offer some helpful suggestions, so don't cuss me out.

[benareeno]

I will build some form of a hushbox...but I don't think I'll bother putting this one on the ceiling. I might if I find a mint green tube..but as-is, I'll leave it on the floor and likely build something up and around it and add in some exhaust AND slow the fans...that's right..no matter what you all say, I will slow the fans if it gets me closer to where I want to be.

Yonexsp slowed his XG fans but added an exhaust fan plenum which worked like a charm. I think that the G70 doesn't lend itself to the plenum idea, but I could definitely mount a rear exhaust fan and pull air through the back of the projector while slowing the 3 fans that push air through the back. I think it will work fine...and if not, I don't really care.

For those who can run a G70 and not find it loud, I think you must be deaf to certain frequencies or something...it's almost as loud as a vacuum cleaner for crying out loud!

[CasetheCorvetteman]

Replace the 80mm fans with 120mm and they will be quieter.

I have an important question though, why are you almost trying to kill a really great projector?

[Clarence]

[grogthegreat]

[Clarence]

I'd read about the 1292 fan noise for years, then one managed to show up in my storage closet. When I first powered it up, it reminded me of powering up a rack server. Or a AV-8B.

[AFryia]

[benareeno]

any pics of your hush box?

The plenum was above the XG...I could likely create a rear exhaust plenum for the G70. I also am not convinced that a hushbox is all that effective if running full speed for the fans...I've tried it a few times, and it just never panned out.

It's loud...if not, it's very loud. My basement room isn't the largest, so projectors tend to sound louder in it than most of your larger rooms.

[Nashou66]

Ben want a G90 lol sorry i had to give that dig.

Nashou

[benareeno]

Hey Nashou,

How is that G90?

[Nashou66]

[AFryia]

[benareeno]

how is it that you exhaust the hot air?

[AFryia]

There are 2 120mm silent fans at 90 degrees to the exhaust duct running at 1200-1400 rpm.

These are low static pressure type so you have watch the back pressure otherwise the air flow will be too low to cool the PJ.

[benareeno]

sounds like a simple design...I like it!

I might build something similar with my floor mounted G70...do you use uni-strut for the ceiling mount?