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All very interesting. They have the 288 driver up for sale on eBay....I wonder what happens if you "buy" it from the EBay site? I'd hate to think someone would pay for one of these on eBay & then get no response......doesn't seem like Bill at all.....or maybe the new people are running the EBay site? 288-8K 288-16K 288-32K HF Driver.pdf Classic-Series-288-8H-Spec-Sheet.pdf

Try messaging them on their EBay site. https://www.ebay.com.au/str/greatplainsaudio

Apart from the binding posts.

I agree with you on the point of them not being keyed into the fitting plates, as this will definitely cause issues with them coming loose over time. Pretty sad to see this hasn't been addressed in a speaker of this calibre. Your 10 year warranty definitely won't cover the fact that they come loose, this is a bad engineering error, probably implemented by the bean counters. If you decide to leave them as is, don't use the bare wire connection, as this will definitely cause them to come loose. Stick with the banana plugs & just make sure they are a nice tight fit for the length they will extend into the plug.

Schematic plus layout.

“but that boxy “stuffy nose” bass sound was still there, obnoxious as ever.” I think part of what you’re hearing is purely the sound of horn loaded bass from a LS. Dont expect LS bass to sound warm or full. They have what I would call a “lean” bass sound. Snappy, forcefull, powerful.....sure, but they will never have the same bass tonality as a bass reflex or sealed box system. Not even the same as a K horn. Even when you tame the side wall resonance & try anything else you like, you can’t change the basic sound signature of the cabinet design. Just my 2 cents worth after spending time with Klipsch heritage & other famous vintage brands that shall remain nameless on this forum.

Thanks guys, Very interesting.

Excuse my ignorance....but what are SKhorns?

You may find this information useful. https://www.northreadingeng.com/Klipschorn_build/Klipschorn_build.html

...and there's your answer right there.

There's your answer right there. ....and I'd be using an ALK crossover or if you can snag one of Deans.

Apart from the "headache" mid horn.

Absolutely.....Greg makes those himself.....can't see him purchasing a product from someone else, when he has the skill & knowledge to manufacture the horns that he utilises. These horns were the start of everything for Greg.

I've had Al's Trachorn & also Daves Elliptrac & used both extensively over some time. For me, the Elliptrac was a step above the trachorn, with a bigger soundstage & smoother, more relaxed sound. I've used the same driver on both horns (Various versions of K55, A55, GPA). Currently using the BMS DCM50 on the elliptrac & find this combo hard to beat. Both are excellent horns. If you can handle the woodwork on the elliptrac kit, I believe it's a bargain.

Looked your Sansui up on the net.....what a beast....300 watts per channel & they command a huge price these days. I didn't realise it was a 2 piece unit. The power amp & pre amp are two seperate units that bolt together. That ones a keeper!!