Proac Studio 100 - DIY

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Whoops

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I've got a couple of private messages over the years on building these speakers so I decided to do this thread to compile all the info I have.

Original drivers are Scan Speak 18W/8542 for the woofer and SEAS 25TFFC for the tweeter.
When I built mine SEAS 25TFFC was discontinued and SEAS 27TFFC was the replacement but it seems that nowadays you can get the 25TFFC again:



SEAS H0519 25TFFC 2015/6 manufacture Tweeter NEW



BASS Reflex tube
The bass refles tube measures 50mm diameter and 125m lenght.
Beware It's a straight tube, doesn't get a smaller diameter in the end. And that seems a bit dificult to find.

The only proper tube I found is this one:

This tube looks exactly the same as the original, although a litle longer, you just have to cut it down to 125mm.

The tube in the end has some rectangle of MDF (lower thickness than the cabinet) glued in check the photo:

138.JPG
 
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Whoops

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Joined
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Location
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There's different schematics online of the crossover, the difference is the the polarity of the speakers,
I'm almost certain this is the correct wiring, but needs to be confirmed...

Proac Studio 100 crossover - Corrected Schematic.png
 

Whoops

Well-known member
Joined
May 9, 2008
Messages
5,532
Location
Portugal
Dimensions
16” (406mm) high 40.6 cm
8” (203mm) wide 20.3 cm
10” (254mm) deep 25.4 cm

Wood is MDF, originals have a type of PVC Cherry Veneer.
I used MDF with a Wood Cherry Veneer, the MDF board already came with the Cherry Veneer glued in.
 

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