BFM Boombox?

Anything not covered elsewhere.
Message
Author
88h88
Posts: 1603
Joined: Mon Jul 04, 2011 10:20 am
Location: Coventry, UK

Re: BFM Boombox?

#16 Post by 88h88 »

Stop making shit hard for yourself.

Image

10 quid for 750ml/26 oz from Toolstation who deliver. Product code 52489.
4xOT12s, 2xT39s@22", TTLS@18", 2xT60@18"

iamlowsound
Posts: 158
Joined: Mon Feb 04, 2013 10:46 pm
Location: Listowel Ontario

Re: BFM Boombox?

#17 Post by iamlowsound »

TimpBizkit wrote:
Bas Gooiker wrote: How are your current builds going?
I live in a shared house in town, how do you think? Bollocks, can't even get decent glue in this country!! :wall:
Well just got some on ebay for £20 for a 10 oz tube.. oh well it'll do for small cabs. Don't fancy hifibobbing my way at that price though!
I feel sorry for you guys that have a hard time finding things. I just saw a new PL Premium at the hardware store that is quick setting where it has 90% strength after a few minutes. You could put together a complicated cab in a few hours with it. One $2 more per tube.

lowsound

lincsoldbird
Posts: 178
Joined: Wed Nov 03, 2010 5:15 am
Location: Lincs UK

Re: BFM Boombox?

#18 Post by lincsoldbird »

Also in a tube 5 minute set £6 a tube. Toolstation code 78519.

Built all my cabs with it, also available in 30 min set which I like better.

Might have a go at that boombox my jack 10 lite don,t quite cut it on the bass.
built 4 T30 24in BP102 now sold 2 DR280
2 speakerplans 1850, 2 MT102 ,2 X15, 1 G sub now sold
2 T60,s Built plus 4 DR280,s in the build

sine143
Posts: 3066
Joined: Sat Feb 06, 2010 3:27 pm
Location: Raleigh NC

Re: BFM Boombox?

#19 Post by sine143 »

eqeqeq. unless your running things at the bleeding edge you can always eq!
Built:
2x Tuba 30s delta12lf loaded (gone)
4x Otop12 d2512 loaded
8x t48s (18, 18, 24, 24, 30, 30) 3015lf loaded
2x AT (1 mcm, 1 gto 804)
2x SLA Pro (dayton pa6, 6 goldwood piezo loaded)
1x bastard XF208

2x OT212 (delta pro 450a loaded, eminence psd)

88h88
Posts: 1603
Joined: Mon Jul 04, 2011 10:20 am
Location: Coventry, UK

Re: BFM Boombox?

#20 Post by 88h88 »

TimpBizkit wrote:I accidentally clicked on the 5 minute stuff. Does that compromise the strength in any way (less time to seep into the wood pores and form a bond)?
BTW thanks for all your help I will be using Toolstation for all my future builds! I got one tube of the US expensive stuff to compare as I bought it before I found out about Toolstation
This was your post on the BFM Facebook page on the 16th...
Whoops! Accidentally bought the 5 minute stuff. Cancelling..
Is your reading comprehension really that bad? I posted up in here and on there about the 30 minute stuff. I even provided a product code to order it with so you wouldn't have to trawl through the website and you still manage to order the 5 minute stuff? Come on man.

The 5 minute stuff is workable but I'd never use it on subs as the time to put the huge panels in the right place and screw them in is a time when you don't want to be rushed. It seems to bond well and is certainly strong but I'm unsure as to whether it's as strong as the 30minute stuff.
4xOT12s, 2xT39s@22", TTLS@18", 2xT60@18"

User avatar
Rune Bivrin
Posts: 521
Joined: Tue Aug 19, 2008 5:42 pm
Location: Stockholm, Sweden

Re: BFM Boombox?

#21 Post by Rune Bivrin »

Image
Some people can't help themselves.
In build order:
O12 with no tweeter.
3 x WedgeHorns.
2 x Jack 10 without tweeters.
2 x DR250.
2 x 16" T39
1 x Tuba 24
2 x SLA Pro (sort of...)

User avatar
Bas Gooiker
Posts: 752
Joined: Fri Jul 06, 2012 5:05 pm

Re: BFM Boombox?

#22 Post by Bas Gooiker »

TimpBizkit wrote:
88h88 wrote: Is your reading comprehension really that bad?
Nope, either the page jumped or I was just in a hurry to buy - got no room for subs at the moment, just building tops!
Tim,
If space is limited. Why don't you look into a small reflex for sub? Start with a 12 inch true sub driver like the BMS 12s330 and start do some sims in winisd. Should do solid 40, flat to 45 in a 35-45l box.
Life is just a game, don't take it to seriously!

anikun07
Posts: 157
Joined: Thu Feb 23, 2012 5:28 pm
Location: Kankakee, IL Region

Re: BFM Boombox?

#23 Post by anikun07 »

Man, I never knew anyone responded, I never got a subscription email! Hm..Maybe Gmail is redirecting them. Here's what I had put together. It's just the M30 bookshelf speakers connected to the Creative Labs PC Sub/amp.

View 1
Image

View 2
Image

User avatar
Tom Smit
Posts: 7457
Joined: Sat Jan 05, 2008 1:24 pm
Location: Sarnia, Ont. Canada

Re: BFM Boombox?

#24 Post by Tom Smit »

anikun07 wrote:Man, I never knew anyone responded, I never got a subscription email! Hm..Maybe Gmail is redirecting them.
I just go straight to the forum, everyday. Also, it does not clutter up my email inbox.
TomS

anikun07
Posts: 157
Joined: Thu Feb 23, 2012 5:28 pm
Location: Kankakee, IL Region

Re: BFM Boombox?

#25 Post by anikun07 »

It was going to spam for some reason. But I use thunderbirdfor my client and keep folders for AVS, BFM, Netflix (for disc status), and any other regular emails I get where having them filtered helps me see them

User avatar
Ian Westwood
Posts: 301
Joined: Wed Jan 16, 2013 11:35 am
Location: Apple Valley, CA

Re: BFM Boombox?

#26 Post by Ian Westwood »

anikun07 wrote:It was going to spam for some reason.
Also happened to me after a couple of months being here... I use gmail.
Image

Authorized BFM Builder

User avatar
Bas Gooiker
Posts: 752
Joined: Fri Jul 06, 2012 5:05 pm

Re: BFM Boombox?

#27 Post by Bas Gooiker »

TimpBizkit wrote:
Bas Gooiker wrote: Tim,
If space is limited. Why don't you look into a small reflex for sub? Start with a 12 inch true sub driver like the BMS 12s330 and start do some sims in winisd. Should do solid 40, flat to 45 in a 35-45l box.
I was thinking about something like that with a 3012lf, and if either driver is suitable for a Tuba 45 it can be upgraded later!
(or a 3015lf eventually in a Titan 48)
The 3012lf might work fine in Bills horns but it is in no way a true subwoofer driver and i don't think it will perform well in a small ported box. I think the smallest thing with decent performance for the 3012 would be a cubo 12.

Or maybe the BMS can be used for a T45 later. 12s330
Life is just a game, don't take it to seriously!

sine143
Posts: 3066
Joined: Sat Feb 06, 2010 3:27 pm
Location: Raleigh NC

Re: BFM Boombox?

#28 Post by sine143 »

do note, hornresp shows a drop in lf corner when corner loaded. this does not happen with anything but front loaded horns (tapped horns with small mouths included). The lab 15 works well in small ported enclosures. low sensitivity, but decent power handling. it will take almost 80 volts before reaching xmax in passband and extend to 30 to 35hz (do about 123 to 125 continuous output, and be flat)
Built:
2x Tuba 30s delta12lf loaded (gone)
4x Otop12 d2512 loaded
8x t48s (18, 18, 24, 24, 30, 30) 3015lf loaded
2x AT (1 mcm, 1 gto 804)
2x SLA Pro (dayton pa6, 6 goldwood piezo loaded)
1x bastard XF208

2x OT212 (delta pro 450a loaded, eminence psd)

sine143
Posts: 3066
Joined: Sat Feb 06, 2010 3:27 pm
Location: Raleigh NC

Re: BFM Boombox?

#29 Post by sine143 »

Yes the lab15 has a heavier cone, makinh it more suitable for low frequency production (sub 50 hz) in a reflex design. It is limited to 60volts in the t60 because of extremely high excursion below horn cutoff, also, you cannot hear distortion in the t60, meaning a peak limiter is imperative for woofer protection.

Check impedance charts to compare shifting of box tuning between 2 pi and .5 pi graphs
Built:
2x Tuba 30s delta12lf loaded (gone)
4x Otop12 d2512 loaded
8x t48s (18, 18, 24, 24, 30, 30) 3015lf loaded
2x AT (1 mcm, 1 gto 804)
2x SLA Pro (dayton pa6, 6 goldwood piezo loaded)
1x bastard XF208

2x OT212 (delta pro 450a loaded, eminence psd)

miked
Posts: 1209
Joined: Fri Oct 23, 2009 4:18 am
Location: San Antonio, TX

Re: BFM Boombox?

#30 Post by miked »

I almost never come to this forum, so I'm seeing this for the first time. That is so badass, it hurts. Scrapping any internal electronics, this would be a complete DJ setup for about 100 people. You could power it off one, strong amp with a built-in crossover. You would literally have two, maybe three things to wheel into the gig. Thanks for sharing your creation, Ian!
Ian Westwood wrote:When I first got into BFM stuff I came up with this... then I realized it would be almost impossible to transport!!

I have calmed down a bit since then and it has never made it off the drawing board.

This is based on SLA with a blatantly refolded T30. Hope you don't mind me posting it Bill :oops:

The horn is not mathematically perfect but pretty close - it differs most at the final flare and path length is about 12 inches shorter (depending on how you measure it) IIRC.

The SLA parts are spot on volume wise.

I tried to figure out an SLA Pro version but couldn't get enough volume for the enclosure.

The voids were intended for electronics / batteries or what ever.

Image

Image

Image

Image

Image

Post Reply