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This would be a great mod for Beatles, as well as games like Iron Maiden, AC/DC, Metallica, Kiss, Aerosmith and maybe even Elvis. There is a recess in the back to suit older Bally / WMS plunger housings as well.
There is a volume control plunger knob as well to really finish off the look. Have fun and crank the volume with this Quad Speaker / Amp mod.
To find the other related parts for the full kit / mod setup lookup - "swinksmusic" or "swinksplungerplate"