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Old 16th April 2007, 08:06 AM   #11
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I have one of these; not on their Website either.

Just a decent general purpose bass driver. Only 5mm X-max.
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Old 16th April 2007, 08:18 AM   #12
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Location: UK - Bristol
Quote:
Thanks all for the advice but I opted for this bad boy,
http://www.bkelec.com/HiFi/drive_un...monolith_du.htm

Sub is finished, 75l ported, tuned to 20Hz and it's just flippin awesome, better than I could have imagined.
I have recently completed a design using that driver from bk, i have it in a 95.4 ltr enclosure tuned around 21hz which provides a -3db of 18hz!

I must say that my subwoofer turned out extremly well and really hits those low notes with authority!

atb,
greg
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Old 16th April 2007, 08:37 AM   #13
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Quote:
Originally posted by Graham Maynard
I have one of these; not on their Website either.

Just a decent general purpose bass driver. Only 5mm X-max.
I have a couple of those too, not bad for the money. How do you know the Xmax?

Also, I believed that BK stopped selling this driver - do you know otherwise?
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Old 16th April 2007, 02:59 PM   #14
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Hi Richie,

I should have used the word approximate. Estimated, not measured. Things stay on my computer for ages.
I ended up buying the Monacors; but other needs have delayed construction.

Cheers ....... Graham.
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Old 16th April 2007, 05:13 PM   #15
Marsh is offline Marsh  United Kingdom
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Quote:
Originally posted by greg_mcquaid


I have recently completed a design using that driver from bk, i have it in a 95.4 ltr enclosure tuned around 21hz which provides a -3db of 18hz!

I must say that my subwoofer turned out extremly well and really hits those low notes with authority!

atb,
greg
Hi Greg, what are you using to drive the sub?
I'm using the 300w module(MF300) with the sub controler(ASBF), both from BK.
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Old 16th April 2007, 07:18 PM   #16
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Hi Greg, what are you using to drive the sub?
I'm using the 300w module(MF300) with the sub controler(ASBF), both from BK.
I am using one of bk's 275w plate amps.

Il get some pics up of the sub later as well, hopefully later in the week i should be able to get some frequency sweeps up to see how the sub is preforming in room.

atb,
greg
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Old 16th April 2007, 07:47 PM   #17
Marsh is offline Marsh  United Kingdom
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Quote:
Originally posted by greg_mcquaid


I am using one of bk's 275w plate amps.

Il get some pics up of the sub later as well, hopefully later in the week i should be able to get some frequency sweeps up to see how the sub is preforming in room.

atb,
greg
Great, look forward to that.

I haven't got around to painting/finishing my cabinet yet. It's not even on any feet yet. Been too busy playing with it.
When it's done i'll post some pics of the build too.

Rich.
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Old 22nd April 2007, 05:01 PM   #18
larksp is offline larksp  United Kingdom
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i am looking into one of the bk monolith drivers but i would love some help / look at the boxes u made for them i would private message you but i cant yet as new to the forums as a member.


maybe picture or the design if you would not mind sharing as i am using a car sub right now tuned to 30hz and the box vibrates on the low notes and i never braced it
slot port as well

thanks
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Old 22nd April 2007, 09:26 PM   #19
Marsh is offline Marsh  United Kingdom
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Quote:
Originally posted by larksp
i am looking into one of the bk monolith drivers but i would love some help / look at the boxes u made for them i would private message you but i cant yet as new to the forums as a member.


maybe picture or the design if you would not mind sharing as i am using a car sub right now tuned to 30hz and the box vibrates on the low notes and i never braced it
slot port as well

thanks

Lots of bracing plus added battons for rear and front baffles covering the joins, then I added a thick seam of wood glue along all internal joins for extra strength. Acoustic damping then added (I used foam pillow stuffing but the proper thing is better I'm sure)
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Old 22nd April 2007, 10:05 PM   #20
larksp is offline larksp  United Kingdom
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yer that looks nice.

is it at all possible if u have the details of building one of these and are you having the plate amp in the box or on its own

i have the 500rms bk amp i keep it on its own small box
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