Want to build small subwoofer

[c3ham]

hi

I would like to try and build a small sub to replace the one i got with this kit http://www.denon.co.uk/site/frames_m...ain=prod&sub=1 but dont really have a clue where to start. I was wonder if you guys could point me in the right direction where to buy the parts and whether to build a sealed or ported box i have a budget of about £150 for the amp and driver.

Any help would be great guys
cheers

[richie00boy]

On such a small budget you will need to get the most bang for your pound. That will dictate a vented box. You will be looking at 10 inch or 8 inch drivers, depending on how big a box you can tolerate. Car subwoofer drivers would be a good place to start looking.

I'd look to power the unit with a plate amp. www.cpc.co.uk do some as do www.bkelec.com

[c3ham]

ok cheers mate

if i bought this amp http://www.bkelec.com/Modules/bsbp100.htm and this driver http://www.bkelec.com/HiFi/Drive_Uni...less/XLS10.htm what size of ported box would u recommend (trying to keep it as small as possible).

cheers

[sreten]

Hi,

http://www.bkelec.com/HiFi/Drive_Units/Alcone/bx10.htm
+
http://www.bkelec.com/HiFi/Drive_Units/Alcone/bx10p.htm
+
http://cpc.farnell.com/jsp/endecaSea...=LS01562&N=411

Needs around 1 cuft, 25 to 35 litres, PR tuned to 32 to 35 Hz.

The XLS10 would also need the matching PR for a small box,
gives similar response to the above in a box half the volume.

/sreten.

[mashaffer]

Some of the paramaters like xmax were not given so I guessed. It looks like it was intended for a pretty small box but you have to tune below "optimally flat" to get much low output. Given the probable room gain I like this one which is a pretty small box good for anything down to 16' pedal stops at reasonable volume levels.

mike

[richie00boy]

The XLS10 needs a passive radiator because the box size is so small that you can't fit a vent in of the necessary dimensions. This would make a cracking little sub, but a bit over your budget? Otherwise I would have suggested it.

[c3ham]

a wee question how come this small sub using the xls10 doesnt have a passive radiator is it because the sub isnt very good or some other reason sorry for the stupid question but im a total newbie just trying to learn


cheers for all the help guys

[c3ham]

sorry forgot to post link http://www.bkelec.com/HiFi/Sub_Woofers/XLS200.htm

[richie00boy]

The passive radiator is required to get the best out of the drive unit. However, in a sealed box and with some electronic EQ it can still perform well. This way usually results in a bit smaller box.

BK must have chosen this design to suit their target price and market. It would complement your little speakers well, I dare say even show them up for how cheap they are, and be a considerable improvement on the effort you got with the set.

[sreten]

Hi,

If your going to buy the sub complete a Richersounds special
is a far more sensible option, should be miles better than the
25W (50W peak) Denon subwoofer.

http://www.homecinemachoice.com/cgi-...86_WHC_030.pdf

The Mission M2SAS seems well suited to job required.

/sreten.