Are the fronts in a pair of v-shape sloping back from the bottom to the top panels? 1 woofer per panel with an array of 4 tweeters. If so, they are the Z-824HP speakers and if you do not pick them you then you should resign from here, sell your entire electronic collection and become a hermit in an area that does not have electricity.
Early units used foam grills that turned to mush and JansZen sold a replacement cloth on frame at the end of the production and after market.
If they are 824s, they are a double Z412HP per unit rated at 4 ohms. Custom builds on special order only in pecan wood and sold for $3,000 per pair in about '72 - '74. Very few pairs were made and sold. At that time $3,000 speakers were both rare and at the top of the price heap.
Woofers were special and will need surrounds and the power supplies and x-overs will need new caps. Depending on x-over version there are omething like 12 caps per combined x-over and power supply but actually not as daunghting as it sounds to rebuild.
I still have a really poor quality sheet on them.
I bought a set when they came out and at the time my speakers were Klipsch Cornwall, KLH Nine and the 824. It was intereting to have both of Art's ultimate design under 1 roof. The Nine being the full range and the 824 being hybrid. From 800 hz up the 824s were better than the Nines since they used his later and better Series II tweeters while the Nines IMHO had the better low end since bass out of a full range electrostatic is to die for IMHO. The 824 has bass extension far in excess of the Nine and went to the basement. Comapring the 824 bass to an AR3a, the 3a seemed to go lower but the detail in the bass of the 824 made 1 realize how poor the bass in the AR really is.
Each of my speakers sounded different and between them could never figure out which I liked better or which reproduced the music closer to the original. 3 different interpretations of the same. As all 3 were LARGE speakers I had to sell something and finally threw an add in the paper for all 3 with something to the effect whoever wants what gets it. The Klipsch went immediately. Neither of the others sold as they were not going cheap. When wife decided on th d/m she kept the JanZen and I got the Nines. I understand she sold them for next to nothing as soon as I vacated knowing that I was going to give here the cash equal to what I would have sold them for. Yeah, she had a bit of a mean streak.
The x-over between the woofer and tweeters in the 824 is a bit tricky as with any hybrid. Happily the adjustment is on the front.
I have a pair of Z412HPs with rough condition cabs and the ps and -overs need rebuild. Wife keeps telling me to dump them but can not bring myself to remve them from the restoration pile. I've had them for 25 years.
