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1x21" vs 2x18"

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mykey View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 29 March 2009 at 1:41pm
B&C website is so bad, why is that?
is was bad before the updated version, and now seems worse
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ceharden View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 29 March 2009 at 1:46pm
I didn't mind it before they updated it but it really is sh1t now
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APMAUDIO View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote APMAUDIO Quote  Post ReplyReply Direct Link To This Post Posted: 29 March 2009 at 3:14pm
Agreed,it is pretty bad!! I wonder why the 21SW150 was updated so quickly? Were there reliability issues does anyone know?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nickyburnell Quote  Post ReplyReply Direct Link To This Post Posted: 29 March 2009 at 11:55pm
Originally posted by levyte357 levyte357 wrote:

Originally posted by APMAUDIO APMAUDIO wrote:

True,but an 18TBX100 has an x-max of 9mm whereas the 21SW150 is 15mm so if my maths are correct(?) the 21" moves a little more air than two 18's?


A few people I know only buy 4 ohm 21"s.

They say the drivers drink uber amounts of power, before they start doing anything usefull.

 
Barry on here (BP) has a load of 21's and a load of 2 x 18's. No comparison, the 21's just sit and growl/rumble. The 2x18's do it all. Both cabs are refex, Cray 21, Opus 2 x18. 21's are PD, 18's Beyma G40.
 2 x 18 all the way. 21's as an added extra to 18's or 15's maybe...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote djstefanos Quote  Post ReplyReply Direct Link To This Post Posted: 30 March 2009 at 1:15am
interesting topic
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APMAUDIO View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote APMAUDIO Quote  Post ReplyReply Direct Link To This Post Posted: 30 March 2009 at 6:10pm
This is what I would have thought but apparently the B&C 21's are much punchier than the old PD's..
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mstep77 Quote  Post ReplyReply Direct Link To This Post Posted: 02 April 2009 at 6:22pm
If you go for 21" then you've got the added bonus of the "look at the size of that badboy" factor!  Everybody has thought about it, but I think the fact is that
2x18" will play very low anyway, a lot higher and be more punchey, I don't think theres much comparison.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357 Quote  Post ReplyReply Direct Link To This Post Posted: 02 April 2009 at 8:52pm
I would imagine in an install, 4x 1x21" reflex cabs, would be slight upgrade on 4x 1x18 cabs reflex.

Would be very interesting hearing 2x 4ohm 21s per side of a VZ5, in 2ohm stereo.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sKs01 Quote  Post ReplyReply Direct Link To This Post Posted: 03 April 2009 at 3:13am
Originally posted by mstep77 mstep77 wrote:

If you go for 21" then you've got the added bonus of the "look at the size of that badboy" factor!  Everybody has thought about it, but I think the fact is that
2x18" will play very low anyway, a lot higher and be more punchey, I don't think theres much comparison.

its not allways about how bug it is but how you use it, f121 anyone?

bit off topic from a ported perspective but wth neo magnets geting stronger a 21" doesnt necisarily have to be slow and earth rumbling if implimented right. with the right 21" tuned right you aught to be able to design a cab with the same f3 with lower group delay if the rest of the T/s are up to it or am i missing something vital?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote APMAUDIO Quote  Post ReplyReply Direct Link To This Post Posted: 04 April 2009 at 10:56am
That's what I would have thought.Modern 21's with neo motors and lighter cones are much better than the early ones and with a monster modern amp they should be able to punch as well as 18's.By the looks of things,all you loose out on is SPL compared to 2x18's
Not getting into the F121 discussion as that's been done to death but there's no shortage of speed (or spl)from that box!
Have been looking into this as i'm about to build some new subs.As far as cost goes,a 1x21 is roughly the same as a 2x18. Still undecided thoConfused
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