New BassChat 8"Cab design

[Chienmortbb]

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...

[Phil Starr]

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.

 

[DGBass]

@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.

[Phil Starr]

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, 2024 by Phil Starr

[Phil Starr]

Better pic tomorrow but it's painted and working

[Chienmortbb]

Nice work Phil. 

[bremen]

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.

 

 

[Chienmortbb]

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. 

[Phil Starr]

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

[bremen]

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.

[nekomatic]

I've just received a delivery from Blue Aran, so watch this space for a build!

 

edit: under way!

Edited January 23 by nekomatic
link to build thread

[Chienmortbb]

On 11/07/2023 at 21:27, Phil Starr said:

John provided the grille so I don't know where it came from.

I have only just noticed this, it was the original grille from the After 8 Combo. It now has a new grille that I will photograph later. Bought from SGS Metals on EBay.  I will also link to that later. SGS will cut to size. 

[tauzero]

After using the shitty house Orange 50W bass combo a couple of times at a local open mic (absolutely dreadful, the front end goes into clipping almost instantly even with the pad on), I thought I'd build one of these to pair either with a TC BAM200 or Tecamp Puma 900 to use there. Interestingly, a search on Ebay for the Fane Sovereign 225-8 gave various results with shipping costs being displayed but when I clicked on https://www.ebay.co.uk/itm/125957204831 it showed shipping as zero instead of a few quid, so that's the one. A trip to B&Q beckons - I think I'll eschew their free cutting service, the last time I took advantage of it didn't fill me with confidence. Looks like materials cost should come in at around £90 given that I have several speakers worth of drainpipe in the shed.

[Stub Mandrel]

2 hours ago, tauzero said:

After using the shitty house Orange 50W bass combo a couple of times at a local open mic (absolutely dreadful, the front end goes into clipping almost instantly even with the pad on),

 

I once tried out a bass through a Crush 50, at any volume could only get overdriven tones whatever I did.

 

Later, when I was older and wiser I discovered the 'blend' control effectively pans from a clean channel to a dirt channel. If it's been left dialled to the dirty side, you'll get exactly the symptoms you describe. 

 

 

[tauzero]

2 hours ago, Stub Mandrel said:

 

I once tried out a bass through a Crush 50, at any volume could only get overdriven tones whatever I did.

 

Later, when I was older and wiser I discovered the 'blend' control effectively pans from a clean channel to a dirt channel. If it's been left dialled to the dirty side, you'll get exactly the symptoms you describe. 

 

Ta. I'll give that a whirl in ten days when I'm back there (probably won't have completed the cab by then anyway).