Help with Acoustat Model 1 + 1

Hi, Acoustat and all other electrostatic speakers I know of should be plugged in all of the time. They take a while to sound their best after being unplugged.

I am not familiar with your HK amplifier, but I know electrostatic speakers are hard on amplifiers and very few solid state amplifiers sound good with electrostatic speakers. Your least expensive solution will be a used Acoustat TNT 200. This is a 200 watt per channel amplifier designed for driving Acoustat speakers.

Acoustat 1+1 did not come with a subwoofer and in my opinion does not need a subwoofer when powered by an appropriate amplifier. The 1+1 should have plenty of bass on its own. The Model 1 came with a subwoofer.

Yeah, I think the 1+1 does need lots of power and you should leave them plugged in all the time. If that bothers you, you might want to look for other speakers.

The Acoustat TNT200 should be more capable than your HK amp. I used a Hafler DH500 on mine back in the day and they were the only speakers that made the Hafler's fan kick up into the high speed. With the Acoustats, the larger models with more ESL panels per side were more efficient than the ones with only one or two panels each... so they played louder with less power.

You can run the Acoustats full range and dial in an active subwoofer using the sub's crossover and volume controls to match it to the Acoustats. If you want to roll the Acoustats off and cross the sub in higher, you will need an electronic crossover or a different set of Acoustat interfaces to accomplish that. But something like an inexpensive (used) Paradigm X-30 active crossover would do the trick.

On the other hand, buying a set of Tekton Lore-series speakers and powering them with a modest tube amp might give better results and they would not have to be powered up all the time...

rrog, plato, thanks for the feedback. per your suggestions i had a buddy come by last night with a 450 w/ch carver pro amp, which although hardly an audiophile-grade piece, made a huge difference--it's clear i was underpowering them even with 150 honest watts. (a bit disconcerting when plugging in the amp makes all the lights flicker, however). the extra juice markedly improved the sub as well. quite exceptional sounding overall--narrow soundstage but eerie realism, detail, etc. i would be curious to compare them to a less challenging, power hungry speaker like the tekton or maybe zu, but these acoustats certainly do justify their reputation.