AKG 2955M06030 Printed Circuit Board for AKG HSC-271

AKG 2955M06030 - Main printed circuit board (PCB) for HSC-PA of the AKG HSC-271

The AKG 2955M06030 is the main printed circuit board for the HSC-PA , the phantom power adapter used in sets with the AKG HSC-271 headset (6-pin mini XLR connector at the headphone jack and 3-pin XLR balanced output to the mixer). This module manages the 9–52 V phantom power for the HSC-271 condenser microphone, provides the balanced output , and houses service functions such as the jumper- able bass cut filter and microphone mute logic. Replacing the PCB with this 1:1 OEM part number restores the adapter to its original electrical function when the electronics have been damaged by shock, moisture, or fatigue.

The HSC-PA is part of the MK HS Studio C cable sets ( 6-pin mini XLR headphone cable and 6.3mm headphone jack + balanced 3-pin XLR microphone cable). Inside the HSC-PA, the 2955M06030 PCB is responsible for adapting, filtering, and routing the microphone signal, as well as allowing the low-cut filter to be activated via a jumper accessible after removing the case.

Main features

• Genuine AKG replacement for the HSC-PA module used with the HSC-271 .
• 1:1 Fitment : Same main board as the serial adapter.
• Power : Handles 9–52 V phantom power for the HSC-271's condenser microphone.
• Balanced Audio : Maintaining the HSC-PA input/output scheme (3-pin XLR).
• Service functions : Bass cut filter jumper and microphone mute wiring documented by AKG.
• System Compatibility : Built-in MK HS Studio C (6-pin mini XLR to headphone; 6.3mm headphone jack; 3-pin XLR mic).

Product benefits

• Restores the HSC-PA adapter's functionality without altering the sound performance of the HSC-271.
• Reduces downtime and avoids complete cable/adapter replacements.
• It maintains factory specifications (phantom, level/impedances, filter and mute) as it is an OEM PCB.
• Clear technical intervention with documented adjustment points (bass cut jumper, mute cable).

Use cases

• HSC-PA with noise, intermittent operation or power failure after impact or moisture.
• Need to restore the bass cut filter or mute function to the original settings.
• Preventive/corrective maintenance in broadcast, ENG/EFP and studio parks.

Frequently Asked Questions

Is this PCB inside the HSC-271 hull?
No. 2955M06030 belongs to the HSC-PA adapter (the “phantom adapter” of the set). There is another separate board inside the helmet (e.g., Switch board 2955M03020) referenced in the service manuals.

How do I activate the bass filter?
Using a jumper located on the HSC-PA PCB. AKG describes the procedure (remove the case, carefully pull out the PCB, and move the jumper to the indicated position) in the HSC/HSD 171/271 manual.

Do I need to solder anything to install it?
May require qualified intervention (e.g., mute cable management according to the manual). Replacement by a technician is recommended.

What cable is it compatible with?
With the MK HS Studio C , which integrates the HSC-PA adapter (6-pin mini XLR to the helmet, 6.3 mm jack for headphones and 3-pin XLR for the microphone).

Description for projects

OEM main board for the HSC-PA adapter for sets with AKG HSC-271 , reference 2955M06030 . It handles 9–52 V phantom power, a balanced 3-pin XLR output, and a jumper -configurable bass-cut filter ; part of the MK HS Studio C cable set (6-pin mini XLR interface to the headset).