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Looking for very good bass driver
Looking for very good bass driver
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Old 2nd September 2002, 05:40 AM   #31
jleaman is offline jleaman  Belgium
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that is a nice settup man i like that im doing some thing like this ( found this photo on passdiy.com and have talked to the person too.. )

But ill be putting in 2 10" per box ( lower box that is ) and haveing the port out the rear.. and ill power all the 10 with 2 n-channels that i am working on ( one is compleet post pics later on in week..)

: O )
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Old 2nd September 2002, 06:52 AM   #32
navin is offline navin  India
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2 10" would require twice the box volume.

while bass reflex drivers do provide more punch they are also notoriously diffilcult to get right for all types of music.

I used to suffer from all sorts of probelms when i was using bass reflex systems. In the end I solved the problem by using ports of different lengths. Every album I had had a note on which lenght of port sounded best.

Most 10" drivers I know SS (the photo seems like a SS 25W8565), Focal (10K516J, 10N515, etc...) and even the el cheapo Peerless (CSX and 831727) require min. 2.5 cu. ft. There are however many 12" dirvers (Shiva, Audio Concpets) etc. that have really long Xmax (12mm or so) and work well in 3 cu. ft.

The 12" drivers I have mentioned are slower (BL/Mms) than the Focal or SS drivers for sure but if you are crossing over at 60 or 80Hz you dont need the extra speed do you?

For the money 2 12" with 12mm linear one way Xmax can move much more air than 2 10" with 9mm linear one way Xmax even if the 10" are in a ported box. What you loose is sensitivity.

If one is going active (then you dont have to worry about sensitivity either) one can even equallise bass end using a Audio Control C101 or something similar.

Bass uses prodigious ammounts of power and to keep the mid bass amp from panting going active is a good option.

acitve has a lot of advantages...

1. for 3 way systems you get away by making a 2 way passive network and using an active XO for the LF.
2. your full range amp does not have to work as hard producing power hungry bass
3. you can eq the bass without affecting the rest of the sound.
4. for acapella, acoustic and baroque music I actually do not turn my bass amp on at all! The signal thenis clean CD - simple preamp - power amp (no EQ, no processing).

the attached phot shows my home made pre amp and power amp. the boxes are from a local power supply company called Nova which I then screen printed.

the left side of the rack is the pre and power amps. the right side is fed via a regulated supply and is te CD players (63KI, Phonisophie, Marantz CD writer, Tape Deck - Pioneer CT93 and EQ for the bass)
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...still looking for the holy grail.
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