ESS Heil Ribbon Diaphragm AMT 10B, AMT 4, AMT 6, HD 12, Factory Part 689-1108 ESS AMT Speaker HEIL Ribbon Diaphragm Part # 689-1108This listing is for one pair or #2 of these itemsOriginal factory ESS partHand folded, USA MadeDouble sidedHEIL Air Motion TransformerDiaphragm: Original Silver Mylar pleated ribbonThis is NOT the generic Mylar version that others sellSize: 1.6875 x 4.6875 (43mm x 119mm)Impedance: 4 ohm, DCR: 3.7 ohmPlease check your model before ordering to make sure you are getting the correct diaphragm.See the Fits Models tab for all applicable cabinet and driver numbers.

ESS (bookshelf model) aluminum bracket set. Fitment of this pair of original brackets (for the larger amt tweeters only) can be flush mount in a cabinet face, or baffle board if you desire. The complete kit available here is not custom made, it is original ESS equipment used in their large bookshelf type loudspeakers. It comes with thin rubber mounting gaskets, 4 L shaped aluminum brackets, and the original stud and nut assy. The brackets are pre drilled to accept all original ESS heil tweeters, with a pass-thru slot for the lead wires. They are also pre-drilled to accommodate face mounting via small-headed wood bolts or, hefty machine screws. I will ship USPS priority within 36 hrs of completed payment. Thank you for looking.

For purchase, a gorgeous set of ESS Heil 4ohm pulp woofers and original passives. The surrounds were just replaced with open cell polyether foam, and the pulp cones are very clean. The radiators are of closed cell design, original to early ESS 12 builds with full 3/4 backings and mass weights. Unique to ONLY early ESS builds, the woofers have 2.5 voice coils wound on anodized formers, unlike every other cast framed offerings from ESS which have 2 voice coils. Also unique to this pair, the backside of the cone base employs a dampener to reduce unwanted harmonic overtones in the upper bass region. Resistance measurements are 3.47 and 3.54 respectively. The rich sonics incorporated in the original lightweight but dense pulp cones, should be considered an essential upgrade to the overall sound of your ESS speakers. Utilized in several models of amt1(x), these are drop-in ready for models such as amt1a, 1b, 1c, 1d, and amt monitor, including all bookshelf variants of those models. These are factory original pulp 12 drivers by ESS of Sacramento, removed from amt1am tower loudspeakers. These drivers were optimized for the specific dividing networks and cabinet offerings that were available during the production years of amt1a, and early amt1am monitor tower builds. Modern replacements (from ESS) 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 ESS, currently. 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 will ship within 48 hrs of completed payment. Thank you for looking.

ZweiESS AMT 1C,dievierSicken der Bässe und Passivradiatoren wurden 2022erneuert. Die Bässe sind technisch und optisch in einem superZustand.Das NussbaumgehäuseinEchtholzfurnieristebenfalls in einem sehr guten Zustand.Technische Daten bitte bittedem Internetentnehmen. Hörprobenach Vereinbarung möglich. Privatverkaufdaher keine Garantie oder Rücknahme. Nur Selbstabholer.

For purchase, a gorgeous set of refurbished original ESS Heil amt 4 ohm woofers and passives. 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, and the aluminum rings retrofitted with brand new discs. 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.

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.

For sale is an excellent working ESS AMT 1B woofer that sounds excellent, the center dust cap is pushed in and center cap needs to be reglued, this ESS woofer sounds amazing! 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! A

HERE IS A COMPLETE SET OF ESS AMT SPEAKERS WITH PASSIVES INCLUDED. ALL FRAMES ARE GREAT! WOOFER HAVE NEW SURROUNDS AND PASSIVES WORK BUT COULD BE RE-FOAMED. JUST THREW THEM ALL TOGETHER FOR ANY SPEAKER PROJECT WITH THE GREAT HEILS AND ALL AMT SKRS WILL FIT.12 APPLICATIONS WILL SHIP ONLY US 48 STATES DUE TO WEIGHT/SIZE.THANK YOU

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!

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.