Need an 18 with close to these specs

John Chiara

John Chiara

Senior
Jan 11, 2011
931
0
0
Troy, NY
Thanks, busy the next few days and not sure how to search for this.

Small Signal Parameters: Fs 28 Hz
Re 4.6 ohms Qts 0.226
Qms 2.28
Qes 0.251
Vas 425 L (15 ft3) 0 3.38 %
Le 1.6 mH
Large Signal Parameters: Sd 0.1195 m2 (185 in2) Xmax ±12.7 mm (±0.50 in) Vd 1520 cm3 (93 in3)
Mounting Information:
Diameter:
Bolt Circle: Baffle Cutout: Depth:
Net Weight: Shipping Weight:
470 mm (18.5 in) 438 mm (17.24 in) 422 mm (16.6 in) 206 mm (8.12 in) 12kg(26lbs5oz) 13.5kg (29 lbs)
 
Re: Need an 18 with close to these specs

Hey John,

What are you trying to stick this in? If it's a reflex cab the Fs is pretty meaningless. Vas is pretty large and Qts a little low, any modern 18" will probably be able to take over just fine. Are you looking to save money or gain performance? We have three 18" that would be a good replacement, depending on how much you want to spend.
 
Re: Need an 18 with close to these specs

Bennett Prescott said:
Hey John,

What are you trying to stick this in? If it's a reflex cab the Fs is pretty meaningless. Vas is pretty large and Qts a little low, any modern 18" will probably be able to take over just fine. Are you looking to save money or gain performance? We have three 18" that would be a good replacement, depending on how much you want to spend.
Click to expand...
Hey Bennett.
These are PAS CB2 cabs that I have for club gigs. I bought all the available cones a few years ago. I found one blown the other day. Not high stress situations....always using a Maxxbass....I think matching the sensitivity is most important.
 
Re: Need an 18 with close to these specs

John Chiara said:
Hey Bennett.
These are PAS CB2 cabs that I have for club gigs. I bought all the available cones a few years ago. I found one blown the other day. Not high stress situations....always using a Maxxbass....I think matching the sensitivity is most important.
Click to expand...

John,

I suggest you try one of our 18TBX100. Specs linked below. It should be very similar, woofer sensitivity isn't really useful when considering subwoofer cabinets. This woofer will be available for a very long time. If it sucks for you we'll buy it back. I would replace in pairs.

http://www.bcspeakers.com/products/lf-driver/18-0/18tbx100
 
Re: Need an 18 with close to these specs

John Chiara said:
Hey Bennett.
These are PAS CB2 cabs that I have for club gigs. I bought all the available cones a few years ago. I found one blown the other day. Not high stress situations....always using a Maxxbass....I think matching the sensitivity is most important.
Click to expand...
The sensitivity numbers (especially between different brands) varies WILDLY -especially for subs and HF drivers. If you look at the response/measurement curves you can see that the "number" could be chosen from pretty much anywhere.

Unfortunately side by side tests are the best way to see if they are the same sensitivity.

I have found that with some HF driver (all highly respected brands) a "printed" difference of almost 10dB results in a side measurement of almost 0 dB. It depends on where the number came from.

And with HF drivers it depends on how it was measured in terms of how it was loaded when measured.

As usual-the "simple numbers" are often not what can be expected in the real world.
 
Top Bottom