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Post new topic Work in progress..Extension speaker Cabinet.
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Author Topic:  Work in progress..Extension speaker Cabinet.
James Phillips


From:
Michigan, USA
Post Posted 12 Mar 2017 10:06 am     Reply with quote

I'm hedging my bets a little by reworking an old projection monitor cab into a extension cab for my little Blue Lady SE amp.It's a perfect fit size wise,I just have to order some grill cloth and a compact handle.

It looked very similar to this on ,but with a 12 instead. I liked the look of the metal grill but I don't think it would contribute to the sound in a positive way , so I reworked the front panel. Also cut the baffle back to allow for a front port.I had to remove the jumbo sized handle ,as well.

It came loaded with a yummy Alnico 12; unfortunately it's a 16ohm and I already have an 8 ohm in the combo so I poped a 8 ohm 12" that I had laying around so I could run a 4 ohm load.

I'm thinking about porting the back a bit ,as well. My rational being ,to get a more open "decoupled " sound ala Kevin O'Connor (London Sound)
. Any amp mavens want to give some guidance on the subject, I would appreciate it .
I will post more pics when the project is done.
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Last edited by James Phillips on 12 Mar 2017 11:35 am; edited 7 times in total
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James Phillips


From:
Michigan, USA
Post Posted 12 Mar 2017 11:11 am     Reply with quote

The back opens like a suit case ,which will come in handy for transporting a couple of pedals & cables....


I think I have just enough left over blue Tolex to do the top. I'll use a light gray epoxy paint for the bottom..I'll have to wait for the weather to warm up a little here ;first,though. Contact cement & epox paint are way too stinky to apply indoors.

Here is the planned ports for the back......


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Michael Butler


From:
California, USA
Post Posted 13 Mar 2017 2:57 pm     Reply with quote

why butcher the back of the cab when you can just open the back if you want open cab sound?

also, i'd tap into the speaker in that beautiful old radio.

i do have to say that alnico speaker should sound great in the cab. what brand is it?

play music!
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James Phillips


From:
Michigan, USA
Post Posted 13 Mar 2017 8:11 pm     Reply with quote

Michael Butler wrote:
why butcher the back of the cab when you can just open the back if you want open cab sound?

Because you need some wood on the back ,to reflect back into the cab,,, Have you ever seen a completely open back cab?
Michael Butler wrote:

also, i'd tap into the speaker in that beautiful old radio.

Not practical for live shows,and from an impedance stand point.
Michael Butler wrote:

i do have to say that alnico speaker should sound great in the cab.

It does sound great but ,again ,it,s the wrong impedance,,if I ran the 16 & the 8 ohm together like that; the 8 would be much louder.

Michael Butler wrote:
what brand is it?

It's a bell and Howell prolly made by Jensen.

Michael Butler wrote:
play music!

Your best advice so far. Winking

I used a hole saw and a jig saw to cut the opening. Even with a fairly steady hand some adjustments with a file where needed.Then some light sanding.

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