J Mac

On 14/10/2019 at 15:20, Balcro said:

 

Top & bottom: - 374 x 315mm
Sides: -               450 x 315mm
Front & back:  - 450 x 350mm.
That will give you a gross internal volume of 41.1 litres. One 4" / 100mm port should suffice.

 

Is that the length of the port? What would the diameter be?

Cheers Balcro. Following that advice i'm going to go forward with the Celestion and see how it turns out. This project is more just to see how I get on with a simple design and have fun with it. I'm not expecting to achieve something amazing just something to get me started in the world of DIY cabs. I'll follow those dimensions you've kindly included and will report back once it's done.

51 minutes ago, Chienmortbb said:

 Based on Phil's cabinet the BL-12-200X will work but it will be limited in output. I have modeled the following speakers

1. Celestion BL12-200X
2. Beyma SM212
3. Fane 12-300
4. Beyma 12CMV2

 

Thanks so much for doing the math, Chienmortbb.  I paid £25 for the B12 200x. What are my options going forward? Should I write the Celestion off as a poorly thought out impulse purchase and look for something more suitable?

If I was to stick with the Celestion how would I go about calculating the dimensions for the cab and the size of the ports? Apologies if these questions are stupidly obvious or don't make sense. I'm totally new to this.

6 hours ago, Chienmortbb said:

I am sure Phil would answer soon enough but there are few 12” speakers at a reasonable price that would work well in a 30 litre cabinet. However,  if you can wait a few hours I will model it for you. 

Thanks very much for your help. That would be much appreciated.

Just managed to source a Celestiob B12 200x from a kind member of this forum for a good price. Would the 30l suit that speaker Phil? 

Cheers

Hey everyone. I'm totally new to building cabs so I want to try to keep it as low budget as possible. Could anybody recommend a speaker suitable for this project that is below £70?
I was going to buy the Celestion b12 200x that Stevie recommended but I can't seem to find them for that price any more.
Cheers