david_l_perry

[quote name='alexclaber' post='182991' date='Apr 22 2008, 05:23 PM']More that the midrange is louder than I'd like. The 3015LF is partially bedded in but I think could do with some more loosening up. The cab was resonating a fair bit at very high levels but I'd finished it off quickly and left out a fair bit of my intended bracing so adding that bit extra shouldn't make that much of a weight difference. Crossover components, wiring and handles also rattled at bit at high volume so I'll have to secure them more firmly next time around. Think I might see how the 3015 stacks up in a simple 1-way cab too. Alex[/quote] Try hot melt glue and tie wraps to secure the crossover components. You should not be getting any rattles from the crossover unless it was just loosely laid inside the cab. This is the mid and low crossovers from my omni:- I cant stress enough the difference I have heard between output of the 3015 before and after it had been bedded in, it was genuinely like a different speaker enclosure (this was another guys omni15 that I heard once with my DR280 and again with my omni 10 in the same room with the same gear. Since the DR280 test, he had gigged his omni 15 a few times (before that he had only had it at low 'bedroom levels') I bed mine in using a 25hz tone at 12volts for a couple of days (not overnight). Do it out of the box and it is pretty much silent. Dont understand why your handles should be rattling as they are recessed units aren't they ? Was it not the amp rack on top ? I sometimes get some rattles in my little skb case when its sat on the omni at high level, but an extra piece of cloth or foam between the two sorts it out. Do you have a measurement mic and RTA so you can see the output using pink noise....? That could help show where the hot output is. Keep at it....... Dave

[quote name='bremen' post='181807' date='Apr 21 2008, 01:28 PM']David, Where did you get those wheels? Chris[/quote] Penn fabrications [url="http://www.penn-elcom.com/Default.asp?MC=1109060&GC=28"]Penn fabrications corner wheels[/url] Its W2080k

HI Alex. So reading between the lines it sounds like the btm end is not as authoritative as you are hoping ? Have you bedded in the 3015 driver fully before testing ? I know this made a [i]massive [/i]difference in the Omni15 Was the cab resonating a lot, hence the comment about wanting extra bracing ? I am assuming at some point the amount of bracing outweighs (pun intended) the choice of 9mm ply rather than 12mm ply, with less bracing.... Dave

[quote name='alexclaber' post='178971' date='Apr 17 2008, 03:58 PM']Now why didn't I think of that? Alex[/quote] Not sure if you are being sarcastic Alex....hope I didn't sound condescending as it may have been an obvious point that you already tried out........ ...Certainly no offense intended if it came across that way...... I have used Aliens method as well on previous cab builds and it also works well, but I found that that you are asking a lot of the bolt to draw the T nut fully into good quality Birch ply as its a [i]lot tougher[/i] than standard ply. In fact the front feet on my omni 15 have been done this way:- Sure enough the T nut has not been pulled all the way in to the tough Birch ply . Over time the t nut could settle further into the ply and cause the feet to come loose. Its not a big problem in this instance but if it was a bolt hidden inside the cab then it would be more of a concern. As my dad always says...more than one way to skin a pig.....

Hindsight is a wonderful thing but.... I always fix the T nuts by using a G clamp to pull them into the wooden panel. But if you apply pressure when driving the bolt (as you would with a screw) then it will tend to pop the t nut loose as you found out.....With bolts you should not have to apply any pushing pressure, just allow the driver to loosely turn the bolts and the thread pulls the bolt in.... You should have been able to pull the bolt out with your fingers (thereby holding the T prongs against the inner face) and keep turning the bolt to remove it even with the driver in place. I have had to do this on a couple of occasions when I have had T nuts drop off.... Bolts are still the best option for drivers as wood screws can strip, especially on something like this where you are likely to need to remove the drivers a couple if times for tuning fine tweeking.... Possibly worth while using a couple of dabs of some epoxy to hold them in place...?? Dave

[quote name='alexclaber' post='178339' date='Apr 16 2008, 09:27 PM']****ing tee nuts. What a ****ing pain in the ****ing neck.[/quote] Whats been the problem Alex ? Have they dropped out when fitting the bolts ?

I have an Omni15 bass cab that anybody is welcome to try out. Its loaded with a 15" bass driver, 8" mid range driver and a melded array of HF piezo's. I am based near Preston in the North West Dave

[quote name='alexclaber' post='177586' date='Apr 16 2008, 08:38 AM']The Omni 15's midrange speaker being horn loaded doesn't go as high (horn acts as a bandpass filter) so I'd expect that to have more need of a tweeter, which the no tweeter plot confirms...[/quote] Yep.. see that now....Looking forward to the result !! Shame you are so far away from me as I would love to see and hear it.....hey ho.... Certainly the Omni 15 is not a one handle lift (still a very light cab for its size though) Dave

Oooo I do like a good bit of woodwork...... [quote name='The Funk' post='177507' date='Apr 16 2008, 12:24 AM']It makes a lot of sense to have a mid-range speaker and not bother with a tweeter.[/quote] I am far from convinced about not having a HF element, however this [i]entirely boils down to taste in Bass tone[/i], what sort of bass you are using and if you are playing with flatwounds... Certainly the Omni15 without the HF elements sound lifeless to me (even with the horn loaded mid range driver), howevor some other users dont even notice if the horn is on or off. I am just replacing the HF element in my Omni 15 with a slightly more sensitive HF melded array to lift up the top end a little more. Cant wait to see the finished box Alex ! Dave

Nick, just sent you and email as the web email link failed on me...... Just sent the same in your PM... Dave Perry

[quote name='alexclaber' post='171532' date='Apr 7 2008, 03:37 PM']No but I did build a rather nice snowman yesterday! Alex[/quote] No Snow in the NW...had to finish my cab instead.....Oooo its alive.....mmmm neo tastic.... Dave

[quote name='thinman' post='169365' date='Apr 3 2008, 07:32 PM']What intrigued me most was a discussion you had on speakerplans.com when doing your very first BFM builds with someone who was convinced that the cabs would be rubbish based entirely on his analysis of designs and never actually having heard one....[/quote] Yep...this was the DR290/280 cabs.... The guy has a very angry spot for Bills designs... His argument was based upon the folded geometry of the DR's causing distortion at certain freq's, and that a folded horn cant reproduce certain freq mainly in the vocal range...he was very hot headed, aggressive and frankly abusive. I kept all of my build and full testing of the DR cab fully documented along with the problems I had.....I sat on the fence for a long time on this build, but maintained an open mind (unlike others). I got lots of help and advice from Bill sforum. End result was a system with the clearest vocal sound I had worked with, and a system capable of producing massive SPL with very little input. All built by an idiot in his garage... The biggest part was that Eq is a major requirement to get them sounding good, which is why I asked Bill to add the EQ section on the forum, so others need not go through the trouble I did... Even once I posted the results (verified with owners of three high quality PA's being at the tests - we owned HK, D&B, Concert systems rigs) and all agreeing that they sounded great, the speakerplans posse simply would not accept it...I gave up and left the children to their squabbles....I rarely go back to that forum its all about 'dood look how big my DJ dance stack is...' Its a shame as Rog Mogul (founder of speakerplans) has designed some amazing systems, in fact I own one of his small systems and its a stunning little PA. He has pretty much abandoned the forum once things started getting out of hand with the children..... Dave

Lovely looking build.... They really are a fantastic sounding cab...... Top job that man...!!

[quote name='gilmour' post='168830' date='Apr 3 2008, 12:34 AM']lol - We can't all build at Perry speed [/quote] If it was not for work and band rehearsals getting in the way of proper stuff (ie cab building) My omni 15 would have been done by now...... Alex...its a race to the finish line here mate..... Dave

Alex, Less nonsing around with the crossover and get building...!!

[quote name='male33lancs' post='163498' date='Mar 26 2008, 01:16 AM']I have recently purchased a 12" bass speaker that has twice the rating of your average guitar speaker and comes in at about half the weight... The difference is the Neodymium magnet...[/quote] You are a [i]little [/i]late to the party with that snippet of information... Neo drivers have been being used by Bass cab manufacturers and DIY bass cab manufacturers for a number of years. They have pretty much become the standard for PA cabs also due to the massive weight savings. I don't think I would consider anything else these days...

Hows the build going Alex...expected it to be finished by now....... Dave