AKG 2231M10010 - Capsule for CK61,SERVICE for AKG C460B ULS

AKG 2231M10010 - CK61 (Service) Capsule for AKG C460B ULS – Cardioid Condenser for Factory Refurbishment

AKG reference 2231M10010 identifies the CK61 service capsule for the AKG C460B ULS modular system. It is an original equipment manufacturer (OEM) replacement part intended to return the C460B + CK61 combination to factory specification when the capsule has suffered wear, damage or loss of performance. The CK61 is the cardioid capsule of the Ultra Linear Series (ULS) , appreciated for its near-flat response and highly consistent cardioid polar pattern in studio, sound reinforcement and broadcast applications.

This service part maintains the geometry, fit and threaded connection of the original system ( M19x0.75 mm thread on the capsule socket), ensuring mechanical and electrical compatibility with the C460B preamplifier. Mounted on the C460B, the CK61 offers 20 Hz–20 kHz bandwidth and a typical sensitivity of 8 mV/Pa , with 14 dB(A) equivalent noise floor across the array, figures documented by AKG for the C460B comb-ULS/61 version. Its ~ 15 mm active diaphragm and lightweight capsule enable stable performance with minimal off-axis coloration.

Main features

• Original AKG replacement CK61 ULS capsule for the C460B ULS ecosystem.
• Cardioid pattern with very consistent directivity and reliable suppression of off-axis sound.
• Ultra-linear response across the entire audible range, suitable for critical recording and vocal/instrument reinforcement.
• Capsule thread M19×0.75 mm and diameter 21 mm for perfect fit in the C460B body.
• Self-cleaning, gold-plated capsule contacts according to AKG documentation for the ULS series, maximizing long-term reliability.
• Recommended assembly by technician following AKG service procedures.

Compatibility and technical notes

• Confirmed compatibility: AKG C460B ULS set with CK61 capsule (factory designation: C460B comb-ULS/61 ).
• Phantom power: The C460B preamp operates on 9–52 V (DIN 45596). The capsule is powered via the microphone body.
• Capsule dimensions (with C460B): Ø 21 mm × 26.5 mm; weight approx. 25 g.
• Important: Do not confuse with the DAM series CK61 cartridge for goosenecks (GN/HM), which is a different product.
• Related reference (CK61 ULS retail for C480B): 2231Z00210. The later ULS series (C480B) shares the design philosophy of the CK61, but features measured specifications with its own preamplifier.

Product benefits

• Restores the original sound of the C460B + CK61 system with neutral timbre and great intelligibility.
• Reduces the risk of noise and failures associated with aging capsules (loss of diaphragm tension, contamination, impacts).
• Extend the life of a classic professional while maintaining compatibility and original aesthetics.

Use cases

• Replacement in studios and rental companies that maintain C460B ULS fleets.
• Maintenance in theaters, auditoriums, and broadcasting requiring coherence between channels/stereo pairs.
• Upgrading legacy systems where stable cardioid and flat response are required.

Frequently Asked Questions

Does it include microphone body or accessories (SA40, W32)?
No. This reference corresponds to the CK61 service capsule . The C460B body, adapters, and windscreen are purchased separately.

Does it work on C480B?
The CK61 ULS is the cardioid capsule of the ULS family. For the C480B generation, AKG marketed the CK61 ULS under retail reference 2231Z00210 . Check compatibility and reference according to your preamplifier.

Does it require adjustment or calibration?
Calibration is not usually required, but installation by qualified personnel is recommended to preserve the integrity of the assembly and stereo pairs.

Description for projects

AKG 2231M10010 (service CK61) cardioid condenser capsule for C460B ULS ; bandwidth 20–20,000 Hz ; sensitivity with C460B 8 mV/Pa (-42 dBV/Pa); equivalent system noise level 14 dB(A) ; capsule thread M19×0.75 mm ; capsule dimensions Ø 21 mm × 26.5 mm ; active diaphragm approx. 15 mm .