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Behind the sofa subwoofer.

Maximo said:
Ok, I have another thought. A behringer A500 is rated at 500 watts bridged into 8 ohms.

Would anyone see why it would not work well as a subwoofer amp?

I am thinking about one 15" sub cut into the wall in the corner (pics tonight I swear). Or two 8" subs in the front wall behind the two main speakers. My thought o the pros for the 15" in the corner is output. The thought on the pros for the two 8" subs behind the mains is tightness and local acuracy for music?

Does any of this make sense?
Thinking about this for the inwall corner sub which would IB into our master closet, which opens to the master bathroom (both of which are really big).

If I go with 2 8" woofer I was thinking about one of these.

http://raleigh.craigslist.org/ele/3313933968.html
or
http://www.ebay.com/itm/RBH-MCS-88-In-W ... 1067914%26

Maybe something like this in stereo?
http://www.parts-express.com/pe/showdet ... er=264-895
Click to expand...

No.

Forget the 8" idea.

I would go with a manifold idea (2 of them) in the best location for the room. Each manifold would have 2 drivers (15", if that's what you choose). The hole in the wall could be relatively small, and the output would be "lovely".
 
I just think you're not going to get into real subwoofer ranges with an 8" driver. Note that the specs on that one from parts express only say it goes down to 37Hz. You'll likely be better served with a single large driver. Why not a 15" of the sort that Flint uses?
 
that is the first one listed, and likely the way I will go. I have been given approval from the boss to make the cut into the wall. Now I just need to figure out which is the best spot in the LR. Again, the downstairs is not super critical listening or movie watching but foorball games and pandora music. So I wonder if I should even bother. But I am just eaten up with curiosity about this whole thought process.
 
get two 15" subwoofer drivers. Mount then in a corner on a manifold. Connect a huge ass amp. Set the crossover low, like under 50 hz. Adjust the level. Change you underwear after each listening session.
 
Maximo said:
I could do two 15's. one on each face of the corner.
Click to expand...
If you're intending on running stereo subs (perhaps that is what you meant by "local accuracy"...that you want to localize where the LFs are coming from), this is the ticket. However, if you're simply after something to cross your mains to that will generate subsonic goodness (perhaps this is what you meant by "output"), then you're going to want to co-locate both 15-inch drivers (read: same corner).
 
The behringer migh twork perfectly. But it also might not. That is the problem with the Behringer amp. When it gets the job done the value is incredible. When it doesn't get the job done, either from not delivering the current needed, or not being reliable enough, it is a huge waste of money.

I would hunt through Craigslist for a real pro amp, like Crown, QSC, or such with more than 250 watts into 8 ohms.
 
I use a Behringer EP4000 to drive my Danley Sound Labs DTS-10 sub. It works great but, like any pro amps, there is the fan noise to deal with. This isn't an issue for me because the amp and sub are actually in the next room. The sub fires through a cutout in the wall.
 
Yup. Manifold idea is the way I'd defintely go.

Amp-wise...I agree with Flint. Go Crown or QSC.

Should be a fun project.
 
Wardsweb said:
It works great but, like any pro amps, there is the fan noise to deal with.
Click to expand...
QSC or Crown (and just about all pro amps) have D (digital) amp line which produces less heat thus requires less fan (CFM) and they are quieter than the traditional transformer types.
 
ok so I have a guy who has a new in the box Klipsch in-wall subwoofer for sale for $125. I was considering this because I was thinking tightness of bass and lf location in the front. I figure I could put it behind the left front.

http://www.klipsch.com/rw-5802-in-wall-subwoofer


Or I can get a 15" sub and manifold it into the back right corner. here is the sub I would use.
http://www.parts-express.com/pe/showdet ... er=295-420

Now for pros and cons.

I realize the 15" is the clear winner, BUT as you will see in the pictures I will be posting you will see that a couch is going to be pushed into that corner. I am guessing that is going to affect the outout dramatically. We haven't bought the couch yet but we are going couch shopping tonight and it will likely be a sectional stuffed into that corner. I really want to learn. I have neglected my learning on subs up to this point. So I want to know everything!

Here is a question specific to the Behringer amp. Take a look at the specs.

It is rated as follows:
Stereo 8 ohm RMS = 125w/175w peak
Stereo 4 ohm RMS = 185w/300w peak
Bridged 8 ohm RMS 375w/600w peak

So why does it not list a 4 ohm bridged rating?

Sigh. Work will not me upload pics to photo bucket. So It will have to wait until tonight. (btw I forgot I had a parent teacher conference and PTA meeting last night that is why they are not up yet). Unless someone is willing to have me email them the pics and they can post?
 
Maximo said:
I am guessing that is going to affect the outout dramatically.
Click to expand...
Not if you have at least a few inches of gap. This isn't mid or high frequency. Ever seen down-firing subs? They only have a few inches of clearance between driver and floor/bottom plate and they work.
 
That makes sense. I will keep that in mind when we are sofa shopping tonight. I am excited about the 15" sub because my master closet can totally take it.
 
Because the Behringer amp does not work well with a 4 ohm load in Bridge mono. They will overheat and go into protect, shutdown or fail. My old Carvin amps list 8 ohm bridge mono and I run them into the EV subs. When in 4 ohm with two subs paralleled the amp gets very hot. This Carvin amp is a fet amp and will not burn out the devices. As the Fet heats up resistance is increased and output is reduced. Transistors are the opposite and when they heat up resistance is reduced and power increases causing thermal run away, leading to shutdown or destruction.
 
Ok so I scored another craigslist find. I picked up this sub for $125 new in the box.
http://www.amazon.com/Klipsch-RW5802-RW ... B000V43G6K

That is a solid $400 savings. I am going to hook it up to my Berhinger A500. As far as I can tell the Behringer A500 has identical specs to the amp that comes with this sub. Hopefully they will like each other. If it doesn't work out I am confident I can sell it for a profit. But man this thing is Sweet! And really heavy too. I cna't wait to hook it up.

I am actually pretty geeked about this thing because I think it will do what I am looking for, add some low end to the front sound stage. I doubt it will shake the house, but right now that can't happen. In order to make a solid IB sub work I need more amp and my budget needs to be replenished. Besides, I think an IB sub upstairs in the bonus room should come first.
 
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