Help with Acoustat Model 1 + 1


I recently bought a pair of Acoustat Model 1 + 1 with Hafler Mk121 transformers. I foolishly bought 'em without testing, and of course, the transformers were near-DOA, but I was able to get 'em repaired and the speakers working. However, I'm struggling with the following and would very much appreciate your counsel:
1. Am I best served leaving the transformers plugged in? Do they need to stay charged? They seem like an electrical fire waiting to happen.
2. I've been testing the speakers with a 150w/ch 80s HK integrated; high voltage/high current, but still need to crank the amp up to get decent volume level. Is it possible I'm underpowering even at 150w?
3. The Acoustat passive sounds marginal; will I encounter any special difficulty trying to integrate a modern powered sub?
Thanks in advance for your insights.
loomisjohnson
You don't need JL-3s to drive your 1+1s. A pair of Quicksilver Silver 90s will do just fine. One of the best amps I have heard on Acoustats is the TNT200. It was designed by Acoustat for Acoustat speakers and it sounded better than my Levinson driving 1+1s.
i appreciate the responses. first, an errata--i actually own the model ones (single panel w/passive sub), not the 1 + 1. in any event, i finally settled on a hafler 9500 amp. as i understand it, hafler based on the tnt200 design after he acquired acoustat in the mid 80's. thus driven, the acoustats are pretty great--they have that non-fatiguing, eerie realism that you only get with electrostatics. their main limitation is soundstage width--they have a definite, narrow sweet spot--which is not an issue in my 9' x 18' listening room. i often see these monoliths listed for near give-away prices (i assume most wives hate 'em), and while not for everyone they're an inexpensive entry to real high end.
I had MY Accoustats catch fire. I was luckily in the room when this happened, and quickly unplugged them, and returned the transformers to Accoustat for repair. I then sold them. I believe I was driving them with an amp called Ampzilla which was 200 watts a side. I don't remember the sound per se, but I remembered being pleased with them....no bass problems that I can recall
Back in the 80's I had the Acoustat model three and drove them with a single Conrad Johnson (tube) MV 75A-1 and I used a Janus subwoofer,no longer made but some maybe around.

This was a nice sounding system,one of my favourites, but I moved on and went thru numerous stats and cones until I'm right back with a pair of 3 panel Acoustats, only this time with their own tubed servo amps.

I feel no need to use subs this time around.

The amps and speakers are fom the middle to late 1970's, the amps have been modded, but everything is left on,(standby)and no fear of fire etc.

If you are fearful,have a qualified service tech have alook at the Transformer/interfaces and if everything is fine, no problems, keep them plugged in and ready to go.
They sound much better when they've been powered up for awhile.

In case you grow tired of them and return to cones, just store the 1+1's, don't sell them.

You'll want to go back to them, so don't let them slip away.