USB using 15mm ply

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   I can only find plans for usb using 18mm ply.

If I use 15mm ply then some of the internal dimentions will be slightly larger. If this sacrifice has to be made is it better to make the rear(back of the driver) chamber bigger or the front chamber bigger - or to make them equally bigger

Alternativley - are there any 15mm plans about?

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xlogic Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 21 August 2006 Location: London Status: Offline Points: 565	Post Options Post Reply Quote xlogic Report Post Thanks(0) Quote Reply Topic: USB using 15mm ply Posted: 28 January 2008 at 1:09pm
	I can only find plans for usb using 18mm ply. If I use 15mm ply then some of the internal dimentions will be slightly larger. If this sacrifice has to be made is it better to make the rear(back of the driver) chamber bigger or the front chamber bigger - or to make them equally bigger Alternativley - are there any 15mm plans about?

Disco Stu Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 03 March 2005 Location: United Kingdom Status: Offline Points: 2492	Post Options Post Reply Quote Disco Stu Report Post Thanks(0) Quote Reply Posted: 28 January 2008 at 1:17pm
	The difference will be negligible However using thinner ply you should try and put in a bit of extra bracing I mostly use 12mm and so long as you brace as close to every 6" as possible (but you can drill holes in the braces to allow sound to pass through) you should be fine Stu
	All you need to know is: Sensitivity + Power Handling - Power Compression = Max Output My acts: www.myspace.com/thebowiexperience www.myspace.com/scheisseelektronisches

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: 28 January 2008 at 1:26pm
	Volume differences between single cabinets made from 15 mm and 18 mm, are in the 7,5 liter range. Evenly divided over both chambers (and horn) the differences can be neglected. Adding only to the rear chamber will improve the low end response a bit, in exchange for a bit lower mechanical powerhandling. Johan

xlogic Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 21 August 2006 Location: London Status: Offline Points: 565	Post Options Post Reply Quote xlogic Report Post Thanks(0) Quote Reply Posted: 28 January 2008 at 2:50pm
	Thanks guys, I think ill try and do it so the all the chamber sizes increase as evenly as possible and look out for where I can put more bracing. Although the extra bracing will actually reduce the chamber size

Mark James Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 15 January 2006 Location: rig side Status: Offline Points: 5306	Post Options Post Reply Quote Mark James Report Post Thanks(0) Quote Reply Posted: 28 January 2008 at 9:01pm
	id make the cab 9mm thinnier [stacked horizontaly] and 3mm less deep, that would compensate it adequatly???
	insert silly sentence here

xlogic Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 21 August 2006 Location: London Status: Offline Points: 565	Post Options Post Reply Quote xlogic Report Post Thanks(0) Quote Reply Posted: 28 January 2008 at 9:25pm
	will the thickness of the wood be noticably detrimental to strength and sound quality

Strange Daze Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 14 July 2006 Location: United Kingdom Status: Offline Points: 2861	Post Options Post Reply Quote Strange Daze Report Post Thanks(0) Quote Reply Posted: 29 January 2008 at 12:27pm
	mmm..USBs dom?? ..what ya got in mind?? ...you not getting rid of ya loonies are ya??!!!!!

xlogic Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 21 August 2006 Location: London Status: Offline Points: 565	Post Options Post Reply Quote xlogic Report Post Thanks(0) Quote Reply Posted: 29 January 2008 at 7:43pm
	well they are to go above the punishers. the looneys aint mine they are nicks but i think he is getting rid possibly to buy punishers

toastyghost Members Profile Send Private Message Find Members Posts Add to Buddy List The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10932	Post Options Post Reply Quote toastyghost Report Post Thanks(0) Quote Reply Posted: 29 January 2008 at 10:38pm
	xlogic: We're going to have quite a bit of kick then, Xtros, Puns and USB!

xlogic Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 21 August 2006 Location: London Status: Offline Points: 565	Post Options Post Reply Quote xlogic Report Post Thanks(0) Quote Reply Posted: 30 January 2008 at 11:12am
	yeah i cant afford xtros atm and I have all this wood sat here threatening to go mouldy on me! and with the workshop just sat there doing nothing it seems a shame not to build something!

Strange Daze Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 14 July 2006 Location: United Kingdom Status: Offline Points: 2861	Post Options Post Reply Quote Strange Daze Report Post Thanks(0) Quote Reply Posted: 30 January 2008 at 12:19pm
	you have a workshop X?? .....I may have to blag a day in there if ya dont mind... Got some double 15" reflex to build...Shouldnt take more than a day or two if i have the wood pre -cut?? :) anychance??

xlogic Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 21 August 2006 Location: London Status: Offline Points: 565	Post Options Post Reply Quote xlogic Report Post Thanks(0) Quote Reply Posted: 30 January 2008 at 12:47pm
	not mine its bonuses its available for anyone to use for donations towards the rent, theres a massive table saw in there,