Hey William, the system I bought as a teenager from Schaak Electronics had the h/k 330b and Omega III speakers. Which were large floor standing with 12" woofers. Like you said, low budget as they were inclined to sell a lot of the systems and make a ton of dough, which I am sure they did. It was massively advertised at the time. Iirc, they called the system the "Magnum 100". They interchanged the parts all the time, but kept the name of the advertised system the same.
We sold a lot of replacement parts for Omega speakers, especially the III- on many Mondays, we had two or three burnouts come in at one time with a handful of drivers and since we had messed around with those to find a good kit, we found replacements that sounded better, handled more power and we also sold crossovers and components, which was great because those speakers had a cap in the tweeter and nothing on the woofer or midrange. Whatever the power rating, it was more than they could actually handle.
Thinking back to that time, I'm no longer surprised by the number of people who financed their systems. We were a big Pioneer dealer and if any in your area started to hold Pioneer Truckload Sales, it was our store where they began- we had Pioneer CE-1, CE3 and CE-5 systems and they came with a tall cabinet, integrated amp, tuner, cassette deck, turntable/cartridge and Pioneer HPM 40, HPM 60 or HPM 100 speakers. In 1979 and 1980, these cost about $599, $799 and $999, which is similar to $2999, $3868 and $4836, today. Now, I feel bad about it. Wow- 1978 was a really bad year for inflation and interest.