Replacing Sega Blast City 130-5156-01 speakers

Spanky

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I'm a total n00b to this, but from what I've read, these speaker boxes are used in several games, and have now reached a certain vintage whereby the rubber thing in the speakers themselves just disintegrates. Indeed, when I prodded mine, they just turned to dust.

The original model, the Toptone F17E4U01-1 is no longer in production.

After much clicking around, I found a speaker which is 1mm less wide and 8mm shorter, whilst still being 4Ω.
May I present to you the SOTAMIA 2Pcs Rectangle Speaker 4 Ohm 10W Full Range Speaker Bass Rubber Side Neodymium Magnetic Hifi Loudspeaker Home Theater
They come in pairs, so I needed two pairs. Here are some comparison photos:
DSC07437.jpg
DSC07438.jpg

Fitting them is so easy it's barely worth describing.

You will need:
  • Crosspoint screwdriver
  • Superglue
  • 2.5mm drill bit
  • little self tapping pan head screws. I took mine from a selection box, and as such I'm not quite sure what length or diameter they were
  • four rectangular bits of plastic or metal, measuring 45mm x 8mm and approximately 3mm thick
Method:
  • Remove the strange old sticky tape from each front each of the speaker box and discard.
  • Remove all the countersunk screws from one side of the speaker box. You should now be able to remove the side panel, you may have to prise it open.
  • If you're like me, you'll now take the opportunity to clean the inside.
  • Observe how the speakers are wired. The replacements will be fitted in exactly the same manner, in series.
  • Remove the countersunk screws holding the speakers in. You won't be reusing these screws.
  • Wrestle the existing speakers out, but leave the tweeter. I found the spade connectors so tight I had to use a pair of pliers in each hand to yank things apart. In fact, on one speaker I tugged so hard a lug snapped off, and I ended up soldering the wire. Meh.
  • Fit the new speakers, ensuring they meet at the centre, as shown below. Secure with two screws per speaker.
  • Buzz 2.5mm holes through the remaining speaker mounting holes. Fit screws to the remaining holes. It's not a perfect solution, but I believe it to be good enough.
  • Reassemble the side panel and screw in place.
  • Glue the little rectangles into place in order to cover the gaps.
DSC07439.jpg

DSC07468.jpg

I'm exceedingly grateful to a certain member on here for making the rectangles.

NB I haven't tried these speakers yet, as my cab is still in two million bits spread across the living room. Your mileage may vary.
 
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Retroman839

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Going to sort my blast city sound out soon , and I have a nos loom to fit .

You might want to fill the little hole under each new speaker or make a new gásket surround with no air holes. 👍

IMG_2023.png

This can effect the speaker performance👍

These boxes are ported but I think it’s chamberd .
Só you definatly want your new speakers fitted air tight to
Achieve the correct sound.
 
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Spanky

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You might want to fill the little hole under each new speaker or make a new gásket surround with no air holes. 👍

This can effect the speaker performance👍

These boxes are ported but I think it’s chamberd .
Só you definatly want your new speakers fitted air tight to
Achieve the correct sound.
Yes, the rectangles were an attempt to close the holes. With the benefit of hindsight, it appears you should probably glue them in place so that they butt up to the edge of the speaker frame, rather than as I did, to the other edge.
 
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