BFM Bass rig

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vlad335 · #1 Post by **vlad335** » Mon Mar 24, 2008 10:17 am

Greetings!

Saturday I used my Omni15 Tallboy and O10.5 together just for the heck of it. Originally built the O10.5 last week with the plan to use it as a replacement for the crappy Behringer combo used for home practice. Plus, With my basement being unheated, I really have a serious jones to start building again and thought this would be a nice little project to get rolling.

Anyway... Simply put, my bass sound was incredible. I know the concept of driver alignments are off but still, these cabs work together really well. I would even say perfectly with my other gear. I got a little more pronounced high mid growl that suited my Lakland 55-94 great.

I still have to match the corners of the two cabs up so they stack better. They are two different types. Oh and BTW, the SWR 18 isn't even hooked up. It was in the trailer and served as a stand for my rack.

We had a keyboard player from another local band sit in with us on a couple songs that night and he gave me some unsolicited compliments on my sound. The guitar player from his band was there as well and they were very interested in my BFM cabs. They couldn't believe that the subs consisted of two 15" drivers! I gave them the URL to this place so they might be showing up.

I am very happy with every BFM cab I have built so far. Every one has performed beyond my expectations. Bill's design's are the best bang for the buck on the planet. My only concern is what to build next!

#2 Post by **Bill Fitzmaurice** » Mon Mar 24, 2008 1:21 pm

This is one case where mixing will work OK, as the radiating planes of all the woofers and mids are pretty close to vertical. What would be interesting to many is how it works with the mid and HF section of the O15 off, using just the 15 as a sub for the O10.5 top.

vlad335 · #3 Post by **vlad335** » Fri Mar 28, 2008 3:55 pm

Bill Fitzmaurice wrote:This is one case where mixing will work OK, as the radiating planes of all the woofers and mids are pretty close to vertical. What would be interesting to many is how it works with the mid and HF section of the O15 off, using just the 15 as a sub for the O10.5 top.

Thanks Bill.

As far as hooking just the O15's bass driver... IMHO, the low end improved with the 3015LF but a bass monster it isn't. It's good, don't get me wrong but personally, I like a huge amount of low bass. Probably more than 95% of the bass players out there. Did try to hook up the 18" but it sounded like complete mud with these cabs. Maybe it always did and the Omni's just pointed this out.

I'm considering building a t-39 or perhaps another O15 sub to mirror along side the tallboy to set my rack on. I could biamp the 15's and get all the huge bass I would ever want and have the beautiful mids and highs that I'm experiencing now.

Getting away from the portability issue but I don't care. The sound is amazing and I will hump whatever I have to get the low end in line to where I like it.

#4 Post by **Bill Fitzmaurice** » Fri Mar 28, 2008 5:30 pm

vlad335 wrote: I will hump whatever I have to get the low end in line to where I like it.

Try the O10 atop one of your T48s.

Harley · #5 Post by **Harley** » Fri Mar 28, 2008 6:50 pm

Bill Fitzmaurice wrote:
vlad335 wrote: I will hump whatever I have to get the low end in line to where I like it.
Try the O10 atop one of your T48s.

I'm going to try out my O10 atop my T39 ( 23" - 2 x BP102 ) next practice. I have your crossover installed - how many ohms will that be please Bill??

Chris_Allen · #6 Post by **Chris_Allen** » Fri Mar 28, 2008 7:00 pm

With 8 ohm drivers in your T39, that will have an impedance of 6 ohms and with your O10 having an impedance of 8 ohms, that makes about 3.43 ohms total.

Chris,

Tim A · #7 Post by **Tim A** » Fri Mar 28, 2008 7:24 pm

Chris_Allen wrote:With 8 ohm drivers in your T39, that will have an impedance of 6 ohms and with your O10 having an impedance of 8 ohms, that makes about 3.43 ohms total.

Chris,

As I undertsand he has a passive crossover installed, so it'd be 6 ohms on the sub and 4 ohms on the top. (assuming it's an O10, not a 10.5)

vlad335 · #8 Post by **vlad335** » Fri Mar 28, 2008 7:31 pm

Bill Fitzmaurice wrote:
vlad335 wrote: I will hump whatever I have to get the low end in line to where I like it.
Try the O10 atop one of your T48s.

Haha! Never thought of that! I'll hook them up before the gig next Saturday.

#9 Post by **Bill Fitzmaurice** » Fri Mar 28, 2008 8:26 pm

Harley wrote: I'm going to try out my O10 atop my T39 ( 23" - 2 x BP102 ) next practice. I have your crossover installed - how many ohms will that be please Bill??

If thats a full size 2x10 O10 you'll be at about 6 ohms in the low frequencies below the crossover frequency, 4 ohms above it, just as Tim said.

Chris_Allen · #10 Post by **Chris_Allen** » Fri Mar 28, 2008 8:43 pm

Tim Ard wrote:As I undertsand he has a passive crossover installed

My mistake.

Harley · #11 Post by **Harley** » Fri Mar 28, 2008 9:56 pm

Bill Fitzmaurice wrote:
Harley wrote: I'm going to try out my O10 atop my T39 ( 23" - 2 x BP102 ) next practice. I have your crossover installed - how many ohms will that be please Bill??
If thats a full size 2x10 O10 you'll be at about 6 ohms in the low frequencies below the crossover frequency, 4 ohms above it, just as Tim said.

Thanks Bill, Tim, all and sundry

Fri Mar 28, 2008 10:26 pm

Chris_Allen wrote:
Tim Ard wrote:As I undertsand he has a passive crossover installed
My mistake.

You'd have been more or less correct with respect to store bought gear, but here we do things properly.

gilmour · #13 Post by **gilmour** » Sun Mar 30, 2008 6:12 pm

vlad335 wrote: As far as hooking just the O15's bass driver... IMHO, the low end improved with the 3015LF but a bass monster it isn't. It's good, don't get me wrong but personally, I like a huge amount of low bass. Probably more than 95% of the bass players out there. Did try to hook up the 18" but it sounded like complete mud with these cabs. Maybe it always did and the Omni's just pointed this out.

^^
I'm quite surprised at this, I find the bass from the O15 awesome, I tend to play a lot of hip hop and live dance where i'm required to be pumping out a lot of sub, and it keeps up great. Have you broken in your driver yet, becuse I noticed (as has Dave Perry on a diff. build) that the bass response really improved after a couple of gigs/rehersals.

That said i'm in the middle of building an O10.5 (although progress is slow - bad weather) and have a feeling a sub might be coming after that...

Sun Mar 30, 2008 9:49 pm

gilmour wrote: I'm quite surprised at this,

You wouldn't be seeing his old rig. Cruise through the reviews, you'll find it.

DAVID_L_PERRY · #15 Post by **DAVID_L_PERRY** » Mon Mar 31, 2008 2:51 am

I dont..know.....whole point vlads first thread was 'help me replace my bass rig'.....Omni 15 was the outcome

Certainly Wills Omni 15 btm end was amazingly different after a couple of gigs, but I am pretty sure Vlad has gigged his several times now.....

It impressed me so much that I just had to build one...(its nearly done)

Type of bass style and bass tone is a massive factor here....

I think anybody carting around a titan sub and omni top just for backline needs their head examining.....

But then carting around 2 4x10's and a 1x18 is also looney tunes stuff...