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Old 25th August 2010, 02:00 PM   #111
jbell is offline jbell  United States
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Quote:
Originally Posted by screamersusa View Post
re: Jbells mini tapped
I would suggest possibly an alternate version that plays lower but gives out at 125 or so.
Quote:
Originally Posted by CuttaBoi View Post
+1
Low, Loud, Small -- pick any 2.

so... scott, you about went crazy getting to your last design... are you saying you're up for round 2? If so, I'm game.

I think I'm happy enough with my last single sheet tops/sub that I won't be designing much for me for awhile, and just focus on building/installing.
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Old 26th August 2010, 06:47 PM   #112
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Can I use filter on this tapped horn. What shoUld I use for high pass and low pass so I don't burn the drivers.
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Old 30th August 2010, 06:47 PM   #113
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Any more updates on this sub and it's performance? Also Jim do you have pics of a sub finished with paint and all the parts(handles,wheels) ?

I think I am about healed up enough to get started.

Thanks Mike
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Old 31st August 2010, 11:53 PM   #114
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I really like the small size of this TH, and the fact that it may be light enough for a single person to lift. I'm tempted to try building it once I got some free time, but that may not be for a while yet!
Quote:
Originally Posted by soundhead View Post
Can I use filter on this tapped horn. What shoUld I use for high pass and low pass so I don't burn the drivers.
I find that Hornresp can help here, it allows you to see the excursion at various power levels, so you can determine how much power you can use at what frequencies.

Even so, I would start off with maybe a 24db/oct HPF at around 30Hz, and go from there.
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Old 1st September 2010, 02:22 AM   #115
jbell is offline jbell  United States
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Quote:
Originally Posted by mike james 533 View Post
Any more updates on this sub and it's performance? Also Jim do you have pics of a sub finished with paint and all the parts(handles,wheels) ?

I think I am about healed up enough to get started.

Thanks Mike
sorry, am out of town on business... no time to play.

40HZ high pass REQUIRED (in my mind) at least 24db/oct.

Wheels???? really? It weighs 50lbs.... which is less than a lot of tops, and within 10lbs of the half sheet top I designed to go with it. Nope, no pics of painted with handles/grills -- will have to wait a week or two, till I get back in town.

50lbs for a sub --
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Old 2nd September 2010, 03:10 AM   #116
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Wheels???? really? It weighs 50lbs....

Jim:

I'm as old as dust and have a bad back. lol When I typed wheels I wasn't thinking. What I should have put was corners,handles,connector plate,paint and grills. No wheels needed I have a rock n roller cart for the subs.

Have a great business trip.

Mike
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Old 8th September 2010, 01:40 PM   #117
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Whats the max spl? excursion or power limited and @ what freq? Is significantly more than what you can get from a 18" driver with more power in the same size box?
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Old 8th September 2010, 02:09 PM   #118
jbell is offline jbell  United States
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Quote:
Originally Posted by hellonwheels View Post
Whats the max spl? excursion or power limited and @ what freq? Is significantly more than what you can get from a 18" driver with more power in the same size box?
Everything you need to answer your questions can be found here....

http://www.diyaudio.com/forums/attac..._aug18_dwg.pdf

Hornresp
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Old 8th September 2010, 02:29 PM   #119
AndrewT is offline AndrewT  Scotland
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Hi all,
since I have had no response to a call for designs that offer lower frequency use from a 1.5 Board design, should I start a new thread for this challenge?
__________________
regards Andrew T.
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Old 8th September 2010, 03:51 PM   #120
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Quote:
Originally Posted by jbell View Post
Everything you need to answer your questions can be found here....

http://www.diyaudio.com/forums/attac..._aug18_dwg.pdf

Hornresp

Thanks, I think there are valid counter arguements to this and they come to mind, but I would appreciate it if what I consider Very basic specs are given right away.
If I'm evaluating 10 designs and have to fill in hornresp for every one... that's some time.
Basically in my application theres nothing more important than max SPL at a given freq. Amps are light cheap and powerful. EQ works for low frequencies. If an efficent design runs out of excursion @ 12 watts, it won't serve my purposes.

Is this the latest version of the sub?
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