Fostex : FW 405 woofer

[thur]

Does any one have already built a subwoofer with the Fostex FW 405.

I'am very interrested by building a sub with this speaker. according to methe 120 litres suggested by Fostex seams to small. 200 to 360 liters seams better.

[sreten]

The Fostex alignments seem to be +1dB ripple alignments.

sreten.

[sreten]

120L sealed seems reasonable, some more alignments, sreten.

[thur]

Thank you very much for your help in this matter.

Your calculations conorm the calculations I have made.

There are not a lot of choise, an average 120 litres volume or more than 250 litres and the best 360 litres.

I accordance to my week-end's calculation, with a 150 litres ventes box + a separte woofer amplifier as the Advance acoustic one, if I bast boost +6 db at 33 hz, I could reach 26 hz at - 3db.

What do you thing about such solution.

Thanks for your previous response.

Have a nice day.

[sreten]

I personally have no experience of reflexing volumes that
should be sealed according to the "standard" alignments.

With this 15" driver I'd go for sealed and hope room gain
and the amplifier boost helps. For reflex max boost is usually
applied at the port frequency, which doesn't look too good.

sreten.

[thur]

Thank you for your help.

I think that I will built a subwoofer with 200 liters (vented box) + amplifier bass boost +6 db at 25 HZ.

I have already buolt a subwoofer with a Cabasse 36 cm with an Advance Acoustic amplifier. Do you have any idea on what kind of amplifier I could use. I have seen the monacor amplifiers for subs which seems to be nice. Do you have any idea on subs amplifier which could fit to my purpose ?