Cool Micro Practice Amp from an Unusual Source

I picked up a couple of old Acoustic Research "Powered Partners" monitors the other day at Goodwill for $12.00. I had never seen these before and they looked like quality pieces witht he cast wedge box and internal amp. I've had them for awhile but today I got the wild hair to plug my J-Retro Jazz into one of them. DAMN!! It worked! And it worked really well. Very clean tone and decent volume. These have a 4"+ driver with a tweeter, volume and tone control and a pilot light. They take an input signal of 10k ohms. These are on ebay and the used market all over for under $30 a pair but they were quite expensive when offered new. AR was bought out several years ago but the units were manufactured under the new name - which escapes me right now. Here's a pic of one with my car key for size reference:

 

The bass is great. You'll reach the driver's limits before the amp distorts. Everything sounded very HiFi. I don't have a passive setup to test it with but there seemed to be enough headroom to get a decent volume.

The ankle is 100% now. I can play the piano again!