Joined: Thu Feb 08, 2007 12:59 pm
Hey and welcome.
Lets see, there are several posts on most of these,but Ill try to help.
The Pre-AOR model Pro-Tube-Lead is closer in design to older Marshall JMPs (plexi with Master Volume) or Early JCM800s. And close in the same gain range. (correct me if im wrong Mr. Hickman)
The AOR Pro-Tube-Leads added a gain stage and effect-loop. Sort of an out-of-the-box way of offering an amp with all the mods that people were paying out the ass for to have done to thier Marshalls back in the day. Higher gain,much heavier-sounding amp. BUT -it can do all the cleans and lesser-gain tones that the previous PTL and Marshalls can do.
Also has Pull-knobs for the E.Q. section controls which adds significant boosts to those ranges (Bass,Mid,Treb).
The 6- Knob AORs lack the seperate control for the extra pre-amp gain stage. The gain is just "on" all the time, and u adjust everything by way of the Pre knob.
The 9-knob models added the ability to pull-on /push-off the knobs of the extra gain stages,giving something like having more than one channel. You can set it up with a lower-gain setting on the main Pre knob, and set the AOR channel to a higher-gain setting, and switch between them.
There are both 30-watt and 50-watt combo versions of the AORs as well, likem mentioned in the other threads here. And ebay is probably the most likely place to find these amps,unless to happen upon a used one in a pawn shop or the occasional music shop.