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Re: Speakers just arrived! Question.
pmbuko #257108 04/16/09 07:21 PM
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davekro Offline OP
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 Originally Posted By: pmbuko
 Quote:
ROTHLMOA

Rolling on the what, now?


Typo????
On the...
house? hottub?

Jeesh Peter, when did YOU get standards? ;\)


Dave

"In theory, practice and theory are the same. In practice they're not."
Re: Speakers just arrived! Question.
Zimm #257112 04/16/09 07:36 PM
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 Originally Posted By: Zimm

I still can't buy that a $300 AVR with 10% distortion at 11 watts sounds as good as the Axiom 500 clean-watt-per-every-imaginable-channel amp, but the K-twins are slowing beating the grasshopper into submission.


I wouldn't and I don't. You don't have to listen to the K-twins. \:D ;\)

 Quote:

Soon I'll have a 1985 Techniques AVR with 4 watts a channel hooked up to my speakers with coat hanger wire. Then I will be the master!


Ahem.... someone beat you to it .


M80v2 | VP150v2 | QS8v2
SVS Pci+ 20-39
Emotiva UMC-1 & LPA-1
M22ti + T-Amp, in the Office
Re: Speakers just arrived! Question.
Zimm #257148 04/17/09 03:02 AM
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Charles, you don't have to "buy" any wild claims. Study the basic principles of amplifier technology which have been well-established for many years and you'll understand that a typical well-designed $300 receiver with about 100 watts at about 0.1% distortion is what's great about the current audio scene, not multi-thousand dollar units.


-----------------------------------

Enjoy the music, not the equipment.


I finally made my DIY QS8 ceiling brackets
jakewash #257151 04/17/09 05:20 AM
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davekro Offline OP
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Well, I finally got around (almost) finishing my DIY QS8 brackets. Here are my home made brackets. All it took was some imagination, a sawsall, a big hammer and some paint. (One could add something to cover the threads and casting markings before painting, for a pro finish)

First I bought a galvanized flange with a 1/2" pipe thread, but decided to use a bigger one with 1" pipe thread which I adapted down to 1/2" pipe. I wanted a little bigger footprint on the ceiling, but any size would work. I'll shoot from the hip rate these brackets at 100 lbs. (or whatever two 5/16" x 2 1/2" lag bolts into a 2x4 rafter will hold. That would be the weak link, if you can call it that.) \:\)

I bought a 2' piece of 1/2" galv. pipe, which was threaded on both ends intending to cut it in the middle leaving two pieces threaded on one end. I had no idea how long I wanted each pipe section. When I figured it out today, each was cut to 6" long.

I tried to squish flat in my vise, No go. Out came the small hand held sledge and I flattened the pipe about 3/4 of the way up towards the threaded end. I left enough space in flattened pipe so the speaker wire could pass through the flat end of the brkt, up through the pipe, them through the ceiling (hole angled off sharply to mostly miss the 2x4 rafter). I still need to drill 1/4" holes for the QS8s an inch or so from the end of the flat part. I wrapped the round end with a towel and put it in a vise. Then used a larger pipe to bend the flat portion to 27º. Lastly, I evened out the mating surface on the grinder so it would be perfectly flush to speaker.

Obviously the pipe could extend down at far as you like and bend or not bend the end. Tomorrow I will tighten the bushing to seat it further down in the base. Then I will give them a few coats of white paint. The pipe will thread in just before hand tight. That way I can easily reach up and rotate the speakers 180º towards the back half of the room when we are there and want to listen to 7 ch stereo or what ever. Between the ceiling and the flange, I will sandwich in a thin coaster to protect the ceiling texture.

First step- materials I had already primed the flanges.
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The primered QS8 brackets with 27º bend to tilt Qs down toward listening position.
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The costs (from memory) were about.
flange ≈ $6.50
2' 1/2" galv. pipe nipple ≈ $3.00
1" to 1/2" galv bushing ≈ $3.50
So about $14 each not including paint which I had.

I'll be glad to get rid of the 8' towers! ;\)

PS. cross posted to Fab5's thread asking about QS8 ceiling brackets.


Dave

"In theory, practice and theory are the same. In practice they're not."
Re: I finally made my DIY QS8 ceiling brackets
davekro #257155 04/17/09 06:25 AM
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davekro Offline OP
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Oops, (Virginia) Peter caught me measuring my brackets to the bookshelf speakers currently on the stand. I was thinking it was for either speaker, but an inch longer (7") would have been a bit better for the pipe for the Q's. With the 6" pipe, I'll need to drill the 1/4" mounting hole 1" from the end, rather than 2" as I had been thinking. At the 27º tilt, the top/closest part of the woofer's rubber surround would be 4 1/2" from ceiling, while the front (lower) part of the rubber speaker surround would be 6 1/2" from the ceiling. I think that is OK.

The distance back from list. pos. is decided (7' where the rafter is! ;\) ).

I have not settled on how far apart to place the backs yet. Currently I have dropped the 12' spacing and thinking about somewhere between 8' and 9' apart.

I will need to listen to my DF backs then swap to Q's to see the difference.

Last edited by davekro; 04/17/09 06:27 AM.

Dave

"In theory, practice and theory are the same. In practice they're not."
Re: I finally made my DIY QS8 ceiling brackets
davekro #257161 04/17/09 10:45 AM
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Lookin' great so far! Keep us apprised!


::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
Re: I finally made my DIY QS8 ceiling brackets
MarkSJohnson #257218 04/18/09 12:10 AM
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davekro Offline OP
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Today I drilled two 1/4" mounting holes for a small amount of height adjustment (1"). I also glued a thin piece of plastic to the bracket's matting surface, so I could adjust the horizontal position easily w/o marring the mounting surface on the QS8.

Out to put the white finish coat on now.


Dave

"In theory, practice and theory are the same. In practice they're not."
Re: Speakers just arrived! Question.
pmbuko #257626 04/21/09 01:58 PM
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axiomite
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Edited:: Nevermind, I was a full page behind

Last edited by Murph; 04/21/09 01:59 PM. Reason: Jumped the gun

With great power comes Awesome irresponsibility.
Re: Speakers just arrived! Question.
Murph #257716 04/22/09 04:32 AM
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davekro Offline OP
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Yesterday I finally got the wire run through the attic crawling on my belly through insulation. True to my procrastinating nature, I did not get up there first thing in the morning, I waited until 2:00 pm. Lucky me, we are having seasonally hot weather yesterday and today lower to mid 90's, so it was 115º when I started and 119º when I finished. I spent about 20 mins. in a cold shower afterwords.

Here are some pics of the finished job.
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This does not look very different than the photos of the speakers on the 8' stands, But in person it sure as h#!! does! \:\)

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A view from the side.

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My DIY bracket at work. Hmmmmn, I know the brackets would hold the weight, maybe I should mount the M60's there to test as backs! \:D (just kidding, i wouldn't drill holes in 'em).

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We did a lot of outside the box thinking about what to try for backs once I decided the QS8's did not work there to my liking.
Scroll down. How about this for a back 7.1 speaker? ;\)
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I mounted a VP150. \:\)

The sound did not fit for me, but it would 'look' impressive.


PS, Hey Randy, I finally figured out how to shrink the pics down on Photobucket! No more PITA scrolling back and forth to read SOB Dave's posts. hah!

Last edited by davekro; 04/22/09 04:34 AM. Reason: PS

Dave

"In theory, practice and theory are the same. In practice they're not."
Re: Speakers just arrived! Question.
davekro #257722 04/22/09 05:07 AM
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axiomite
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Looks good Dave.


Fred

-------
Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!
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