Boy I could have made a mess of a couple lead guitarists over the years using the 3620 cab lolllOh it doesn't sound bad running it like you did, it just to me is louder and more aggressive in the mids running everything full-range. Less hi-fi.
I first learned this with a similar cab over 30 years ago, the 3620. It is the granddaddy to this cab as it has two 18s and two 10s. It was a shame to limit both those giant 18s to 500hz!
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Yep the way I ran it using only 1 cable from rear of head to 1 full range socket on the cab sounded beautiful to me anyway and had heaps of grunt. As a matter of fact I made up a special speaker cable and had a small amount of Velcro hook attached near the end of the plug..and a patch of velcro loop on the cab full range jacks because I used to have a problem with the volume from the cab blowing the speaker cable out the back of the cab full range jack..lolll the Velcro held the 2 together as intended.

