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The Advanced Audio CM-12 is an edge fed, dual diaphragm, tube condenser microphone based on the famous AKG C12 and ELAM 251 capsule design and tube circuitry. The CM-12 circuit is optimized for a 6072a dual triode tube. The CM-12 features our AK12 capsule. The AK12 is a 6 micron, edge fed, dual diaphragm capsule that is within + and – 2db of an original AKG C12 capsule response.
The 6072a circuit in the CM-12 has been optimized by us to yield a much lower output impedance than the original circuit by utilizing the second half of the 6072a as a cathode follower. This produces about 2db more headroom than the original AKG circuit as a plate resistor is not required with the cathode follower circuit. The lower output impedance of the cathode follower stage improves the damping factor producing a faster transient response. This lower output impedance can easily drive the smaller turns-ratio of the BV11 output transformer yielding 3db more output level than the original transformers used in the AKG C12 and ELAM 251.
The BV11 output transformer will deliver +18dbm with less than 1% distortion. The BV11 transformer is coupled with a 1.5ufd mylar capacitor to take advantage of the transformers and capsules response down to 10 hz. The BV11 transformer is a dual bobbin transformer wound to original Telefunken blueprints and was used in the Neumann M49 and M50 circuits.
Specifications:
• 1.07” dual diaphragm
• AK12: 6 micron German Mylar
• Edge fed capsule
• 15hz to 20khz
• 9-selectable pick-up patterns
• -17db(A weight) noise
• <200 ohm Impedance
• .5% distortion @ 125db
• +18dbm output < 1% distortion
• Class “A” 6072a tube circuit
• BV11 output transformer
• Robust shock-mount
• Aluminum road case
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CM-12: $695.00
Shipping USA & Canada: $30.00 |
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CM-12SE: $849.00
Upgraded transformer.
Shipping USA & Canada: $30.00 |
We will install boutique capsules from Peluso, Tim Cambell, Beez Neez, Thiersch Elektroakustik or another, please contact us for more details.
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