Well I happen to have a little extra cash floating around (thanks to my graduation gift from the parents) and I am seriously thinking of getting an ep350 to go with my ep500.

I have my ep500 in the corner up front and to the right, and was thinking about placing an ep350 in the back left corner. I could move the subs away from the corner as much as needed to eliminate any 'boomy' bass.

I guess I have a couple of questions:
1.) do you think an ep500 and an ep350 would go well together?
2.) do multiple subs increase bass output AND smooth out the bass over the entire room?
3.) my room is 2150 CF, but it is pretty much open to a fairly large kitched and to a hallway. Am I nuts for wanting two subs?

and the last question:

I happen to have an extra driver laying around, do you think I could purchase the sub without a driver and save some cash?

Thanks!

T, multiple subs increase bass output and can also result in smoother bass, depending on placement in the room. If they're widely separated, as you're proposing, the increase in output would be the 3dB increase experienced when any two speakers output the same sound. If they're located closely together(within about 1/4 wavelength at 80Hz or whatever highest frequency they're responsible for)the increase in output can be as much as 6dB, because of mutual reinforcement at that close distance.

Smoothing the bass can result from placements as shown in the frequently cited Harman study by Dr. Toole and his colleagues. Placement of two at the middle of opposite sidewalls or the middle of the front and back walls was best, but diagonally opposite corners, as you propose, were also of benefit in reducing resonances because of the subs being located at points where the phase relationships were opposite each other.

I am also considering adding additional subs for my super large room, around 8,000 cf. While I would like another 500 or 600, my budget will allow for multiple 350v3's as they are much cheaper, and I would most likely order from the FO. Two of them for about the price of one 500 is not a bad deal and with that nifty new circuit Alan talkes about, I'm very curious about others trying this.....

I have always recommended dual subwoofers at a minimum to all my friends setting up HTs regardless of room size. The benefits in terms of increased headroom, lower distortion and smoother frequency response are very real.

While two of the same subwoofers are ideal, its not necessary in order to get most of these benefits. If going with different subwoofers I would suggest trying to use 2 subs that have close tuning frequencies ( also called Fb or box resonant frequency). It will make it easier to get the phase right between each sub and better blending with the speakers, and result in smoother FR. Its a phallacy that you have to use the same manufacturers subs to get these benefits and any two subs with similar Fb should be OK if their other design parameters fall in line. Even if that's not possible to have similar subs, dual subs are still usually worthwhile because of the extra headroom and lower distortion.

Fb of the EP500/600 is around 22/23hz and I suspect given the similar dimensions of the EP350 it would also be in that vicinity so they would pair really well. One thing to keep in mind is there will be a slight time delay because of the DSP processing in the 500 so if you can, position the 500 one metre closer to the listening position than the 350 for optimal placement.

I plan was to keep the ep500 in the front right corner, and put the ep350 in the back left corner. If I switched these two then I would have the 500 closer to me so that may be better.

However, the 500 would then be at the end of a 40 ft sub cable, while the 350 would be at the end of a 10 ft cable. Does that matter?

Also, I suppose I would want to put the phase at 180 for the speaker at the back and try that first right?

It shouldn't matter at that cable length as long as it has reasonable shielding, but if you had the connector at the receiver/processor output I would go with balanced connections to be sure.

If you don't have a display to see FR (like with an SMS-1 for example) set your RS metre at your favourite seat and try all the phase switch combinations. Many articles suggest, erroneously in my view, to choose the setting which sounds loudest. Loudest often means bigger peaks. Its far better to choose the combo that has less volatility on the metre when running a sweep. That means a smoother FR. The beauty of multiple subs is all the headroom you have to raise the volume and keep things smoother and clean.

Is there any difference between this cable:
http://www.monoprice.com/products/produc...&seq=1&format=2

and the Lc-1 cable listed here:
http://www.bluejeanscable.com/store/subwoofer/index.htm

The first is about 10 bucks for 50 ft, while the second is $65

Thanks.

I doubt it.

They are both 75 Ohm cables, there will be no sonic differences. The price difference is most likely due to where it is made.

For the price difference its a no brainer to go for the monoprice cable. However there are some quality differences favouring the Blue Jeans that I see. The Canare connectors on the Blue Jeans are much better build quality that those RCA's. Shielding looks the same. Capacitance is lower on the Blue Jeans which theoretically is what you want in an interconnect. Still not worth the price difference.

I doubt you can hear the difference in cable capacitance in sub bass over that distance. The bigger concern is how noisy is your environment and at 40ft thats in the zone where I would start to think about balanced cables to make sure there is no extraneous noise.

Sonic differences do exist in cables, but are so dependent on shielding, capacitance, inductance, impedance, noise in the environment and especially how the cable interacts with your player,amp or speaker/subs that generalizations are near impossible.

What are these balanced cables you speak of?

Are you suggesting I should get some kind a cable to reduce any noise interference?

I had a low frequency hum with my ep500 that was caused by my cable box. The axiom ground isolator fixed that problem.

Yes. I use balanced when I can. Though your receiver/processor must have balanced outputs. The EP subs have balanced inputs. Going balanced often fixes hums as well. This one: http://www.axiomaudio.com/balancedcable.html Though I have to say those prices look expensive and for a 50ft run you can get better pricing if you look around.

The $65 cable at bluejeans.com says this

"It has an extremely heavy double-braid shield layer for the best possible rejection of induced low-frequency hum"

Does this mean it is a balanced cable?

Balanced cables do not have RCA ends.

Axioms version of coax RCA ended subwoofer cable
http://axiomaudio.com/subcable.html

Axioms version of balanced cables, your AVR may not have balanced outputs.

http://axiomaudio.com/balancedcable.html

I've used both monoprice and bluejeans, and your ears won't tell any difference. It is kinda like buying Monster speaker wire over Home Depot wire, if you have a fat wallet go for it.. I did not get the top of the line bluejeans cable and it seemed to lay very nicely on the floor, don't remember what I paid.

Take a close looks at the connectors in the links Randy posted, that is the most visible difference. Also look at the inputs on your EP500 and you can see the RCA inputs you are currently using and the input for the balanced connection.

The main advantage of balanced cables you can't see. Inside the cable the wires are designed to cancel noise that commonly occurs the longer the run.

It doesn't read like you have balanced connections on your other equipment so don't worry about it just get a RCA cable with really good shielding. Some guys use a unbalanced to balanced adaptor on their RCA output jacks and use balanced for the long run. I never have so I can't speak to its effectiveness. You may not have unwanted noise anyway so it could be a non-event and RCA throughout would be fine.

Here is a quick primer.

http://www.ofsoundmind.com/OSM2/tech/equipment/balanced.html

T, the only significant difference in those two cables is $55. In ordinary home environments the usual shielded coaxial cable is adequate for the amounts of interference which might be present. Extra-heavy shielding or balanced connections wouldn't be of significant benefit. Cables such as those from MonoPrice or similar do the job and there's no good reason to spend more.

Even though they are a little more pricey, you can support Axiom and purchase their cables:

http://axiomaudio.com/subcable.html

Built quality are outstanding.

jj