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Old 21st June 2002, 10:08 PM   #1
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Join Date: Jun 2002
Location: San Diego
Question Subwoofer Location

Hello,
Iím new to this forum but Iíve dabbled in car/home audio for a while. My home system is as follows:
∑ Onkyo M501 amp
∑ Onkyo receiver
∑ Vector Research satellite array
∑ Sony big screen / DVD player
My interests are:
∑ Rock, grunge, pop, oldies
∑ Home theater
My budget-minded goals in order are as follows:
∑ Construct a subwoofer to supplement music and video
∑ Add a A/V surround sound receiver (considerable latter)
My question regards the subwoofer. I need to settle on a location then select what subwoofer amplifier to purchase. Please view these possible location pictures:

http://members.cts.com/funtv/c/core/sub/sub1.jpg - Location just left of TV under vase with driver firing left or right but I donít like the idea of aiming right towards the TV (6.4 cubic ft)

http://members.cts.com/funtv/c/core/sub/sub2.jpg - Location under A/V rack with driver firing right (2.6 cubic ft)

http://members.cts.com/funtv/c/core/sub/sub3.jpg - Location above TV with driver firing up

Note that the wife will not allow me install a speaker grill that can be see on the front wall on the entertainment center, only to the sides.

I plan on constructing a custom sealed box that will fit in one of these cavities and simply installing a grill on the drywall directly if front of the driver.

Any thought on the best location/plan?

I am entertaining the thought of purchasing a PE 250W at 4 ohms plate amp (current on sale for $118) from PE along with either the 12Ē Dayton titanic MK II or the 12Ē Shiva MK III from acoustic-visions ($125 shipped). Iím willing to spend 300-$400 for components and Iím open to suggestions.

Any thoughts on the amp or the sub?

Thanks in advance.
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Old 21st June 2002, 10:34 PM   #2
frugal-phile(tm)
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Default Re: Subwoofer Location

Be wary of siting the sub near the CRT or it may go rainbow on you.

The way a sub excites resonant modes is very room dependent. I would suggest building a box you can move around (if if only a temp box) until you find the best place.

besides the Daytons & Shivas (which are fine woofs) there are a large number of other competitors worth looking at. I just got 2 Stryke/lambda SAE 1024s which i am particularily enamoured of... the pictures don't do these beauties justice.

dave
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Old 21st June 2002, 11:17 PM   #3
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Default Re: Re: Subwoofer Location

Quote:
Originally posted by planet10
Be wary of siting the sub near the CRT or it may go rainbow on you.
His tv looks like a projection type... does anybody know how strong a mag field would have to be to cause a problem?

It looks like a nightmare room, made worse by the wife-imposed restrictions. Is a wife upgrade a possibility? That might blow your budget... better to stick stick with the original plans, I think.

I am not yet married, but my girlfriend doesn't mind(or at least pretends not to) huge TVs and speakers. It's a tough enough situation to build a system without any constraints, so I wish you the best of luck. You'll find something you'll be happy with, I'm sure.
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Old 22nd June 2002, 09:24 AM   #4
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Default Re: Re: Subwoofer Location

Quote:
Originally posted by planet10
Stryke/lambda SAE 1024s which i am particularily enamoured of...
dave
Dave,
I am most defiantly open to using another subwoofer and/or amp. Can you elaborate on what you like so much about the SAE1204ís. What type of enclosure are you using?

Also the TV is a rear projector but Iíll test the raw driver near it just in case once I get it (TV has 3 small picture tubs in the front that can be effected).

Thanks,
John
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Old 22nd June 2002, 02:03 PM   #5
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Default Re: Re: Re: Subwoofer Location

Quote:
Originally posted by core
I am most defiantly open to using another subwoofer and/or amp. Can you elaborate on what you like so much about the SAE1204ís. What type of enclosure are you using?
From the front there is not alot to tell it from a Shiva or a Titanic, but turn it around and the gorgeous cast AL frame sets it apart. I also really respect Nick (of Lambda) and the quality of product he is producing -- the SAE 1024 is his bottom of the line. And it is also 1 for $110, 2 for $200 so it is less expensive then most.

I'll be doing a push-push TL with them. I just happen to have a split level along the front wall my living/listening room. The enclosure will be mounted in the ceiling of my shop (12' high) and load into the LR thru the wall.

dave
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Old 23rd June 2002, 05:21 AM   #6
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Default !!got the project just for you!!

I have just the project for youÖ
I have been hear for a wile and I have designed a few subwoofers for my home theater. The sub I am about to suggest is self designed and Sounds great. If you are interested I can give you a parts list and blue printsÖ This sub rocks the house. It is driven by a very nice sub by BLAUNKT. The sub is the Pcwi1200 and it puts out tight clear bass. It is also cheapÖabout $85 USD! The whole project will cost you less then $400 and is really is a great sub for the priceÖ Itís detentions are 16Ē wide, 19Ē tall, and 21Ē deep. I run it at about 30% volume and it shakes the frames on the walls all over the house.
It is also easy to build and you donít have to mess with XO because it is built into the PE 250w plate amp.

If you are interested just say so and I will draw up some diagramsÖ

Later,
Slice
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Old 24th June 2002, 08:33 PM   #7
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I would take you up on your offer except that those dimensions (high limit) would force me to use the cavity on the left side and I like the idea of building a box that allows me to use it in either side for testing purposes. Thanks though.
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Old 28th June 2002, 12:52 AM   #8
sam9 is offline sam9  United States
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Default What are the criteria?

I've struggled with the "sub problem" in a couple of houses, condos and apartments. [Two spouses(not simultaneously!), too.]

If pysical unobtrusiveness is the key element, the Sunfire Jr. beats out everything except something you build into the walls. Doing without, is not an option, I assume. The tube shaped subs from fom Hsu have a very small foot print but are very visible normally. The Newton Series from Cambridge Sound Works look like furniture. Put a vase with flowers on top and they disappear.

If sonics are the issue, it gets even sadder sometimes. The best location will almost always be blocking a doorway or some other unacceptable arrangement. They photos were nice but, I've found rooms to be so different from one another, the optimum location can't be decerned from a floor plan unless you put the room into an expensive 3D CAD file and run heavy duty simulations. The only thing that has worked for me is a combination of accoustic treatment and and professional audiospectrum aanalyzer I got on Ebay. My personal and biased opinion is that the choice of sub is not critical - choose it on the basis of budget, visual acceptability and footprint so log as it is from a respectable manufacturer. My rational is that location, accoustic properties of the room and practicality of acoustic treatment overwhelm mearly all the diferences in measured specs. The subjective desires like "tightness", "slam" etc have more to do with the room than the choice of sub so long as you avoid the few really terrible units.
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Old 28th June 2002, 06:42 PM   #9
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Default Re: What are the criteria?

Quote:
Originally posted by sam9
[Two spouses(not simultaneously!)]
Too bad -- that could have been fun :^)

Quote:
My personal and biased opinion is that the choice of sub is not critical - choose it on the basis of budget, visual acceptability and footprint so log as it is from a respectable manufacturer. My rational is that location, accoustic properties of the room and practicality of acoustic treatment overwhelm mearly all the diferences in measured specs. The subjective desires like "tightness", "slam" etc have more to do with the room than the choice of sub so long as you avoid the few really terrible units.
I have not seen it put this way before, but it closely coincides with my take on subs. There are so many good competitive drivers in this mid budget range that picking the driver is the least of your worries.

dave
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Old 28th June 2002, 09:20 PM   #10
e96mlo is offline e96mlo  Sweden
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I have heard that you should place the sub at your listening position and then walk around and listen. The place where it sounds loudest is where you finally should have the sub.

Any comments on this?

/Marcus
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