This Kustom 118B was upgraded to some modern standards. It can be loaded with a 15" (with adapter) or 18" woofer with an on/off switchable Eminence Alpha 6 CBMRA running 800Hz and up. It comes loaded with an MCM 15 (#55-2983)
and an adapter ring. I prefer to use a 15" since the inner chamber is too small for most any 18 to produce useful deep low end. Even the high end 18's I tried even felt a bit flimsier in the lows and low mids than the 15's in this box. (Cab is pictured with a Faital 18FH500.)
I'd call it punchy with a clean top end (.8-5k) with the mid on. With the mid off it sounds like a W bin. It barely reaches into the 1kHz range and retains the same low end character. It's actually very overdrive friendly either way.
500w RMS, 8 ohms. 48" h x 25" w x 18" d not counting the casters. 18" to 15" plywood adapter ring is included with the sale.
$180 or it stays in my basement.
The original CTS 18" with a shifted magnet is free if you pay shipping.