Chienmortbb Posted October 16 Share Posted October 16 2 hours ago, Phil Starr said: 3 hours ago, Chienmortbb said: I was thinking that the random bass playing from the hall was louder than I was for some of the time Random may be too kind for some of our playing... 2 Quote Link to comment Share on other sites More sharing options...
Phil Starr Posted October 25 Author Share Posted October 25 Snatched a few minutes to finish the cab build from the bass bash. A few minor faults caused by rushing things as I was talking but nothing a bit of filler won't sort . Hopefully it can be filled and painted this weekend. 9 Quote Link to comment Share on other sites More sharing options...
DGBass Posted October 26 Share Posted October 26 @Phil Starr, I see your cab build has what looks like cross bracing inside between the top and side panels. I didn't see this on the original build diagram. Is this a late revision and if so, were they just glued in place and do the two braces connect where they cross? What wood did you use for the braces? Cheers, DG. 2 Quote Link to comment Share on other sites More sharing options...
Phil Starr Posted October 26 Author Share Posted October 26 (edited) 1 hour ago, DGBass said: @Phil Starr, I see your cab build has what looks like cross bracing inside between the top and side panels. I didn't see this on the original build diagram. Is this a late revision and if so, were they just glued in place and do the two braces connect where they cross? What wood did you use for the braces? Cheers, DG. Well spotted, the original cab which was cube shaped had no braces and that is what we have tested. It's a simple matter to cross brace the panels and I had some off-cuts which were exctly the same dimensions as the panels. The ones in the photograph are just a tight push fit and i will stick them in when I fit the speaker. I'll do a final write up of the build and discuss bracing and damping the cab there. If you are going ahead with the build before I reach that point then simple cross bracing like this is almost impossible to get 'wrong' Edited October 26 by Phil Starr 2 2 Quote Link to comment Share on other sites More sharing options...
Phil Starr Posted October 27 Author Share Posted October 27 Better pic tomorrow but it's painted and working 9 Quote Link to comment Share on other sites More sharing options...
Chienmortbb Posted October 28 Share Posted October 28 Nice work Phil. Quote Link to comment Share on other sites More sharing options...
bremen Posted October 28 Share Posted October 28 On 26/10/2024 at 17:34, Phil Starr said: Well spotted, the original cab which was cube shaped had no braces and that is what we have tested. It's a simple matter to cross brace the panels and I had some off-cuts which were exctly the same dimensions as the panels. The ones in the photograph are just a tight push fit and i will stick them in when I fit the speaker. I'll do a final write up of the build and discuss bracing and damping the cab there. If you are going ahead with the build before I reach that point then simple cross bracing like this is almost impossible to get 'wrong' Top tip: rout a 6mm slot into the panels. Fill with foaming flooring adhesive https://amzn.eu/d/frLAMMw 5.5mm ply bracing then fits snugly and is going nowhere. Quote Link to comment Share on other sites More sharing options...
Chienmortbb Posted October 28 Share Posted October 28 5 minutes ago, bremen said: Top tip: rout a 6mm slot into the panels. Fill with foaming flooring adhesive https://amzn.eu/d/frLAMMw 5.5mm ply bracing then fits snugly and is going nowhere. Are you suggesting this purely for the bracing? Most builders stoped using that type of adhesive for cabinet edges some time ago. Quote Link to comment Share on other sites More sharing options...
Phil Starr Posted October 29 Author Share Posted October 29 On the subject of bracing: I eventually settled on a single horizontal brace placed centrally in the side panels. The vertical brace was too close to the port and placing it off centre didn't really add to damping the panel resonance. Placing the horizontal brace centrally shifted the resonance up an octave as you'd expect but on a simple tap test reduced the resonace considerably in volume. The cab sounded fine with no bracing too but the cross brace was a simple addition so I left it in 2 Quote Link to comment Share on other sites More sharing options...
bremen Posted October 29 Share Posted October 29 On 28/10/2024 at 09:06, Chienmortbb said: Are you suggesting this purely for the bracing? Most builders stoped using that type of adhesive for cabinet edges some time ago. Yes. It's probably not as strong as pva but it holds the bracing nicely in a slot. 1 Quote Link to comment Share on other sites More sharing options...
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