Speaker selection and Fs?

Maximum SPL throughout the intended passband, followed by polar response. As for the Celestions, the 65 Hz Fs makes them unsuitable for electric bass IMO.

 

im not a pro like bfm, but i put the speaker into win isd and seem what the different graphs look like for different sizes, tunings and sealed/ported. i also check the higher frequency extension and sensitivity as well, which is important.

bfm probably does all that roughly in his head when looking at the specs in about 3 seconds...

 

That wouldn't be the driver I would pick. It begins to unload @ 58 Hz (in 1.09 ft3 & 64 Hz) due to the high Fs. Decrease the box size and lower the tuning and the freq where it unloads goes down, but low freq extension suffers.

 

The T/S parameters for the BN10-200X above are incorrect to no fault of the OP. The parameters on a number of the drivers are incorrect. The f(s) of the BN10-200X is 50.7 . The updated parameters are available on the Celestion website. There are a number of other discrepancies with other drivers as well. If anyone is interested in the correct parameters feel free to PM. I know this is 7 years after the original post. Many other manufacturers have incorrect T/S parameters as well...for whatever reason. I never take them as fact and test drivers in house before using them. It was a lesson learned many years ago.

 

unfortunately I usually ignore everything celestion makes. without being negative if a fs was noted as being high then magically gets lower it's suspicious.

 

It makes you wonder if they have trouble measuring the specs (bad) or if they are doing evil marketing (worse).

 

Fs is the free air resonant frequency. Below that the motor struggles to control the cone effectively so you tune above it.

 

Old wives tale so to speak. You do not have to tune above it.

 

Welcome to the corporate world

Not evil marketing...just incredible lack of attention to detail. I feel for their design engineers who have always supplied some stellar products...and they're sales reps that have to explain marketing's over sights.

 

Well there seems to be no similarity whatsoever with the company that operated in foxhall rd Ipswich, In the late seventies and early eighties in the days of the likes of Ed Form technical director and Mr Knights from the test shop who got that right first time every time.RIP.

 

If you think sales and marketing are not capable of misleading, decieving and flat out lies, I have a nice bridge for sale

 

Unfortunately or fortunately, after 35 years it is obvious that it stems from lack of attention to detail and lack of accountability and not intent. I was brought up appreciating attention to detail and I hold myself accountable for all I do. That's the best I can do. I have no control over many things but I can make sure that materials I use in my cabinets are what they are supposed to be. So, I'll continue to test any new drivers that go in my cabinets myself. Thank you for the bridge offer and its i before e except after c.

 

Thanks for the spelling tip. I'm dyslexic, and probably typed that on the phone. It's actually "I before E except after C," so "deceiving" would be an exception. I certainly didn't mean to say *you* were making an inferior product, but there's plenty of that going around... Not to mention marketing. Did you buy a pocket hose? You know where they reverse the video and it coils back up Bridge offer holds!

 

Late at night, on Ebay is a vulnerable time....guitars, amps...guitars and amps I do miss Ron Popeil and the pocket fisherman always makes a great gift. Pocket hose, not so much.
You're not lying: I before E is what I wrote. You are cixelsyd! Thank you for your sense of humor!!! And I know you were not saying I make an inferior product. What are you using for gear? Are you playing out regularly? Forgive me if I'm off topic or thread.

 

I met Ed several times, first in Holliston, MA and then at NAMM in New Orleans we got to hang for a week. Great guy. Yes, things have changed significantly several times. Unfortunately the engineers are still lacking the support of marketing. Did you know any of engineers from C-Audio? They designed a most amazing guitar amp back then. All solid state, built in to a roadcase, 3 channels, built in Leslie, reverb, all switching via a infrared foot switch and it sounded better than any tube amp I ever encountered. It was called a Redmere. I believe they only built 6. Sorry to hear about Mr Knights.

 

Yup Ed went to Tannoy as technical director when he left Celestion. I didn't personally know any of C-Audio's engineers but I used there power amps every time I worked for Criterion hire. They Rocked and were very well built rugged designs I remember.

 

Isdelxics of America: Untie!

Gear in signature + a 15" with no real cab yet.

Never played out. I will never get paid to play any music, but there's a fair chance I'll get paid to stop!