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Old 28th April 2015, 07:24 AM   #1
diyAudio Member
Join Date: Apr 2015
Location: Oslo
Default Choosing the right components for small enclosure

Hi all, new user, noob, be nice.

I've currently started a project where I restore an old shelf-radio:

Click the image to open in full size.

It's a old AM-receiver, which will have a new tube amp (probably the S-5 8LM, but I'm open to suggestions) and a full range speaker. It's a mono-setup, and it has a quite roomy speaker-compartment, it currently accomondates a 8" speaker in a closed design - no bassport or horn, just a lot of 40's dusty sound-dampening material. The wood quality is good, so Cutting out a bass-port should not be a problem.

So the question is, are there any good ways on choosing the correct full-range speaker for this enclosure? Either by calculation, or by someones experience. I'm looking / listening for that old, warm, soft radio-sound.

I'll provide measurements and drawings later on in this thread, for now I'm doing the woodwork finish and restauration.

best regards
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Old 28th April 2015, 12:32 PM   #2
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Join Date: Feb 2008
Location: Sheffield
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I'd probably go for an Alpair 12P, and add a rear bass port. There are some standmount ported boxes around somewhere. Should do the job nicely if you can make the cabinet airtight - could be a problem for valve amps unless you go for some clever porting...

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Old 28th April 2015, 12:37 PM   #3
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Join Date: Apr 2015
Location: Oslo
I'll check it out, airtight isn't a problem, since the cabinet is is divided.

What if I wanted the bass port to point downwards, since I need to put this close to a wall ? (this is probably a noob question but...)

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Old Yesterday, 06:02 PM   #4
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Join Date: Mar 2015
Ive been attacking the problem by stripping every thing out, adding a class D, then using full range drivers, in stereo.

Typically I add a raspberry pi for internet radio, then a Bluetooth receiver!

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