For purchase is a pair of original 4ohm ESS amt tweeter diaphragms of the Kapton variety. ESS has not made Kapton diaphragms available for a very long time. This diaphragm pair has unique power and heat handling characteristics due to its membrane substrate material. Transparent goldish in color, these have been gently used, are extremely rare, and come with no restrictive netting. These 689-1107 membranes fit all of the larger amt tweeters, including amt1a / 1b / 1c / 1d / amt monitor / amt1am, and all of their bookshelf variants. Due to this pair being of the 4ohm variety, they would not be appropriate for early ESS builds such as the amt1a, which use a dividing network designed for 6 ohm membranes. Kapton membranes allow for a longer life span due to their higher heat handling, at full rated power input. Original Heil air motion diaphragms from ESS of Sacramento. I typically ship within 36 hrs of completed payment. Thank you for looking.

For sale is a pair of great working ESS AMT 1B radiators with some minor wear, fits all models in the title, please see pics. No shipping to Alaska, Hawaii and Puerto Rico. You will receive everything you see in the pictures, if it is not pictured then its not included. All items have a hidden invisible security mark. Please view pictures and ask any questions you might have. Have a nice day!

One single original ESS Heil AMT 1A speaker badge.Approx 1-15/16 inches wide, 11/16 inches tall. The pins on the back are broken off. Badge will need to be glued in place. No one buys this, its going into the garbage.

Vintage Pair of ESS HEIL AMT 1aM Air Motion Transformer Monitor Speakers low serial number models of a highly sought after and scarce pair of monitor speakers these measure 101cm high, 40cm wide and 40cm deep both have had their tweeters removed for another project but otherwise intact these are really sought after and these larger monitor speakers are incredibly rare both have their fabric covers but one speakers top wooden frame is broken and needs repairing (see images) these are really big and heavy so will require collecting or buyer can arrange their own courier from Manchester M27 8UJ

Ess Amt 1a, cassa singola: tweeter di Heil assente, woofer da riconare e ribordare, passivo da ribordare, cabinet buono, crossover con comandi presente.

Vintage Pair of ESS HEIL AMT 1aM Air Motion Transformer Monitor Speakers low serial number models of a highly sought after and scarce pair of monitor speakers these measure 101cm high, 40cm wide and 40cm deep both have had their tweeters removed for another project but otherwise intact these are really sought after and these larger monitor speakers are incredibly rare both have their fabric covers but one speakers top wooden frame is broken and needs repairing (see images) these are really big and heavy so will require collecting or buyer can arrange their own courier from Manchester M27 8UJ

Ess Amt 1a, cassa singola: tweeter di Heil assente, woofer da riconare e ribordare, passivo da ribordare, cabinet buono, crossover con comandi presente.

Ess Amt 1a, cassa singola: tweeter di Heil assente, woofer da riconare e ribordare, passivo da ribordare, cabinet buono, crossover con comandi presente.