AKG 2908Z12010 - Foam Disc for HSC171 (Compatible with HSD171 and K171 MKII)

AKG 2908Z12010 - Foam Disc for HSC171 (Compatible with HSD171 and K171 MKII)

The AKG 2908Z12010 is the original internal foam that AKG refers to as "Disk/Scheibe" in its service manuals. It is placed under the cushion of each earcup and serves a dual purpose: protecting the transducer from dust and optimizing the acoustic response of the headphones. It is the 1:1 OEM replacement for the AKG HSC171 and HSD171 headsets (item 4 in the exploded view) and is the same part used in the AKG K171 MKII headphones (item 22 in the exploded view), allowing for consistent maintenance of mixed ear pads.

Replacing the earcup is simple: simply remove the ear cushion from the earcup, remove the damaged foam, and insert the new 2908Z12010 , ensuring it fits evenly. As with the original model, each earcup uses two foam discs (one per earcup); they are usually sold individually .

Main features

• Original AKG part ( Disk / Scheibe ) for HSC171/HSD171 and K171 MKII.
• Location : Under the pad (between the transducer and the cushion).
• Function : dust protection and acoustic tuning of the cup.
• Documented compatibility : HSC171/HSD171 (pos. 4) and K171 MKII (pos. 22) in their parts lists.
• 1:1 Replacement : Maintains factory fit, materials and performance.
• Units per earpiece : 2 (one for each cup).

Product benefits

• Sound restoration : restores the original frequency response by replacing degraded foams.
• Preventative maintenance : prolongs the life of the transducer by acting as a dust filter.
• Hygiene and comfort : clean replacement that avoids residues of aged foams.
• Cross-compatibility with K171 MKII for parks that combine headsets and headphones.

Use cases

• Headsets with foam that has become pulverized or broken down over time.
• Replacement after deep cleaning or reconditioning of rental units.
• Normalization of fleets where HSC171/HSD171 and K171 MKII are mixed.

Frequently Asked Questions

How many units do I need?
Each earpiece uses two foam discs (one per earcup). They are usually sold individually.

What is the difference between a “foam disk” and a “cushion/earpad”?
The foam disk is the inner foam beneath the ear cushion. The cushion is the outer cushion that makes contact with the ear.

Does it work for HSC271/HSD271?
No. For HSC/HSD271 the equivalent part is 2908Z12020 . 2908Z12010 corresponds to HSC/HSD171 and K171 MKII.

Description for projects

AKG OEM foam disc for headphones/headsets: part number 2908Z12010 ; located under the ear cushion ; compatible with HSC171 and HSD171 (position 4) and K171 MKII (position 22). Usually supplied per unit; 2 required per complete headset.