For purchase, a gorgeous pair of ESS Heil amt 4 ohm woofers. The surrounds were just replaced with open cell polyether foam in June 2023, and the bextrene cones are very clean. As most early ESS builds, these woofers have 2 voice coils wound on anodized aluminum formers. Resistance measurements are 3.4 and 3.3 ohms, respectively. They should be considered an essential replacement if your woofers are indeed compromised. Utilized in several models of amt1(x), these are drop-in ready for models such as amt1a, 1b, 1c, amt1am, amt monitor, and all bookshelf variants of those models. These are factory original bextrene 12 drivers by ESS of Sacramento, removed from amt1b loudspeakers. These drivers are optimized for the specific dividing networks and cabinet offerings that were available during the production years of amt1b and monitor tower builds, circa 1977 through 1980. Modern replacements (from ESS currently) are not engineered to be coupled with amt drivers, nor your existing crossover networks where applicable. No testing or sampling has been performed with the new, generic off the shelf woofer drivers provided by the new Los Angeles based ESS. Packing will be very stout, expect these to arrive as advertised. UPS or FedEx will be the carrier, please let me know if you have a shipper preference. As with all of my listings of ESS equipment, if you are looking for parts from that era of long gone builds, feel free to inquire as i will assist with whatever parts i may have inventory of. I usually ship within 48 hrs of completed payment. Thank you for looking.

ESS PS4A - AMT Heil Monitor Air Motion Transformer System ! 2 Stck ! Einer defekt , er funktioniert aber ist leiser wie der andere . Membran verbogen ? Wollte nicht dran rumbasteln . One speaker is OK ! The other is quieter and has mechanical damage! Vielleicht geht er nach geradebiegen auch wieder ? Es sind nur noch 7 Originalschrauben vorhanden . Originalbilder sind Bestandteil der Beschreibung ! Preisvorschlge auch gerne ! Lieferumfang wie in den Bildern ohne weiteres Zubehr !

1 Vintage ESS Heil Air Motion AMT Crossover Monitor Speakers 70s Sn 2249 1 of 2 This is a working crossover This is for the one scene in the pictures serial number 2249 We have two available but if you just need one for a replacement here it is Were very communicative if you need any more pictures or have any questions please ask we pack well and ship quickly with tracking Thank you

For consideration is a single (lone) crossover module from an amt1b cabinet. Original Heil air motion 2-way dividing network from ESS of Sacramento, in great condition. Fitment will be exact if you intend to use it to replace your 1b network, and will also be a direct fit for amt1c and amt1d cabinets. The presence and brilliance knobs have gone missing, as photos show. I usually ship within 36 hrs of completed payment. Thank you for looking.