Multi purpose bass design

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   Hi All,
I would like to start a project to design and build a bass cabinet that will cover from about 40hz to 180hz when using only 1. Needs to be fairly compact, so i dont think a horn will get anywhere near 40hz. The cab will be used for all types of music. Looking to use a 15in driver if possible.
Any ideas greatly appriciated 
Jamie Whitehouse

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whitehousejamie Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 08 March 2004 Location: United Kingdom Status: Offline Points: 1485	Post Options Post Reply Quote whitehousejamie Report Post Thanks(0) Quote Reply Topic: Multi purpose bass design Posted: 10 November 2004 at 6:34pm
	Hi All, I would like to start a project to design and build a bass cabinet that will cover from about 40hz to 180hz when using only 1. Needs to be fairly compact, so i dont think a horn will get anywhere near 40hz. The cab will be used for all types of music. Looking to use a 15in driver if possible. Any ideas greatly appriciated Jamie Whitehouse

mobiele eenheid Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 15 August 2004 Location: Netherlands Status: Offline Points: 1563	Post Options Post Reply Quote mobiele eenheid Report Post Thanks(0) Quote Reply Posted: 10 November 2004 at 7:12pm
	Sounds like you need a typical 15" basreflex. Any favorite 15" ? Cheers

whitehousejamie Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 08 March 2004 Location: United Kingdom Status: Offline Points: 1485	Post Options Post Reply Quote whitehousejamie Report Post Thanks(0) Quote Reply Posted: 10 November 2004 at 7:18pm
	A suitable P Audio driver probrably, not an Eminence, dont think i will ever buy one again.

Timber_MG Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 27 March 2004 Location: South Africa Status: Offline Points: 1454	Post Options Post Reply Quote Timber_MG Report Post Thanks(0) Quote Reply Posted: 10 November 2004 at 7:35pm
	A really nice driver for such purposes that has been available recently might be the BMS 15s from the Ultra Low Distortion series (the neo stuff looks really nice too). They have seriously low distortion and a true 8mm x-max. They also model really well in reasonably compact enclosures. A plan for a compact lug-onto-the-back-seat 15" sub is the Achenbach 15" design to be found on www.lsv-achenbach.de -> baupl�ne (let google do the translation) . He uses a neo 18Sound 15 IIRC, but have a look and see how the alternatives fare. Martin

loophole Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 02 March 2004 Status: Offline Points: 469	Post Options Post Reply Quote loophole Report Post Thanks(0) Quote Reply Posted: 10 November 2004 at 7:36pm
	at a quick glance, c15-600el looks pretty good, so does the s15-500lf and the p150/2226

loophole Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 02 March 2004 Status: Offline Points: 469	Post Options Post Reply Quote loophole Report Post Thanks(0) Quote Reply Posted: 10 November 2004 at 7:38pm
	not as alternatives for the achenbach design btw, just as paudio drivers for BR in general

Timber_MG Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 27 March 2004 Location: South Africa Status: Offline Points: 1454	Post Options Post Reply Quote Timber_MG Report Post Thanks(0) Quote Reply Posted: 10 November 2004 at 7:45pm
	There shouldn't be too much rocket-science to get a proper BR cab done fairly well. The only contentious issue, is the end correction factor for such corner-ports. In the words of a german forum: it is easier to lengthen such a port than it is to shorten in a prototype enclosure. One can get a fairly good measure of the port frequency by measuring the impedance minimum between the two peaks in a BR alignment or better yet, to measure the frequency response with teh mic inside/close to a port. The peak is the port tuning frequency (which aparrently doesn't occur exactly at the minimum between the peaks) The link was provided as a starting point for such developments. Martin

Jim York Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 30 October 2004 Location: United States Status: Offline Points: 34	Post Options Post Reply Quote Jim York Report Post Thanks(0) Quote Reply Posted: 10 November 2004 at 8:35pm
	Tuba 24 (www.billfitzmaurice.com/plans/product_info.php/products_id/5) measures 24 inches cubed, runs from 32 to 200Hz with average 96dB/1 watt. Tuba 30 is 30 inches cubed, averages 100dB/watt from 32 to 200 Hz, though probably a bit too large for what you want.

Timber_MG Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 27 March 2004 Location: South Africa Status: Offline Points: 1454	Post Options Post Reply Quote Timber_MG Report Post Thanks(0) Quote Reply Posted: 10 November 2004 at 8:42pm
	Yup. Jamie has systems suitable for larger events and something small can come in handy for corporate presentation or situations where one needs something discreet. Unfortunately horn systems are generally not suited for this (heck show them corporates where it's at and stack 12 HD15s in their face) Martin

Elliot Thompson Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 02 April 2004 Location: United States Status: Offline Points: 5365	Post Options Post Reply Quote Elliot Thompson Report Post Thanks(0) Quote Reply Posted: 10 November 2004 at 10:05pm
	Hi. I would recomend a Dual Fifteen Reflex. It will give you the efficency, and, the SPL needed for high powered systems. Double Fifteens are as versatile as you can get. The Beyma 15 LX 60, would be a good candidate for the job, if you happen to find a good deal on them. Best Regards,
	Elliot Thompson

Andrew Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 10 March 2004 Location: United Kingdom Status: Offline Points: 669	Post Options Post Reply Quote Andrew Report Post Thanks(0) Quote Reply Posted: 10 November 2004 at 11:27pm
	Fane 15XB seem to do the job OK in my reflex units.