Rythmik Sealed Sub Decision

[tpattgeek]

Hi all,

I'm needing some advice for a new subwoofer setup. My current setup is in a 1,520 cubic foot bedroom (perfect square) and consists of:

Denon 510BT
Klipsch R-25C, RM15s, and RM14s
SVS PB-1000

My current issue is when I first built this setup, I thought HT/movies was my top priority, but it seems as though I'm using the system more for 2CH music and the mid-bass frequencies are severely lacking. After lots of research (reading reviews and others' opinions), I like what I'm hearing about the F8 and F15HP. With a 5.2 receiver, I'm currently unsure if I should go with 1 large sub... or a large and mid (F8) solution.

The current sub is located in the front left position. That is fixed due to closet location on the right. I do have the option to put a second sub in a rear corner. My questions are... am I crazy to ask about an F8/F15 setup? Listening position will change depending on music vs movies although music is more of a priority. I'd like to have a decent experience with movies when the time comes although that is no longer top priority. Would single or dual F15s be better in this case?

There is no WAF and reasonably no budget constraints since I want this to be future-proof in case it is moved into a larger room at some point. I'm open to any and all suggestions and thank you in advance for any advice!

 

[shadyJ]

The people to ask is the folks at Rythmik. Personally I would get two of the same model. I would not try to mix these types, especially if you are going to be moving them to a larger room later. I it were me, I would probably get two L22s or two F15HPs.

 

[KEW]

1520 cu. ft. is not that big of a space.
You said no WAF, but often a smaller box gets you more placement options.
Like ShadyJ suggests, check with Rythmik, but I think dual F12's would do the job.

You should avoid mixing subs, especially combining an 8" with a 15", if you intend to use Audyssey.
I believe Audyssey attempts to determine where you sub rolls off as one of the rules it applies to EQ'ing them. The 8" subs absence of strong bass may deceive Audyssey into believing you sub rolls off at the limit of the 8", so it will apply its own roll-off to the subs (which means you kind of wasted the money for the 15"). Alternately, it may determine your low frequency roll-off based on the 15" sub in which case, it will turn up the bass a bit (since only one sub is providing bass). In this case, Audyssey will be sending a strong low frequency to your 8" sub which will be working it hard at frequencies it really cannot handle well.

 

[Foxrox]

If you’re open to all suggestions you should check these out:

http://www.hsuresearch.com/products/uls-15mk2Dual.html

Room gain should be phenomenal with dual sealed 15s in your room. I imagine you have at least one huge peak in your bass response due to the square room. Do you know what frequency it is and are you already using EQ to subdue it?

 

[tpattgeek]

If you’re open to all suggestions you should check these out:

http://www.hsuresearch.com/products/uls-15mk2Dual.html

Room gain should be phenomenal with dual sealed 15s in your room. I imagine you have at least one huge peak in your bass response due to the square room. Do you know what frequency it is and are you already using EQ to subdue it?

I was actually wanting to purchase the ULS 15 mk2 until I found out it was on back order for potentially 2 months. I then started shopping around again and landed on the 2 Rythmik options.

Yes, I do have a huge peak in bass from one ported 12 and I'm trying to close that gap as well as have better performance for mid bass music. I do not know the frequencies or whether I'm using EQ to subdue... the 510BT interface is fairly limited compared to other higher end models (e.g. no Audessey). Any suggestions for confirming this?

 

[Foxrox]

You can calculate the peaks in your frequency response based on the room dimensions. Having a square room means a “double” room mode, which is why you would have an extreme peak. Alternatively you can try to measure the peak with an SPL meter. Audyssey would knock down the peak if you had it.

The other experts on this forum know a heck of a lot more about this than me. I’d recommend reading the Audioholics articles about bass management and subwoofer setup first and then searching the forums for more discussion.