Advanced Audio CM49 Tube Condenser Microphone
The Advanced Audio CM49 was designed with the vintage Neumann M49 in mind. As with all of their microphones, Advanced did not clone one of the vintage M49 versions. Rather, they used modern designs, circuitry, and components while maintaining the sound of this classic microphone famous for producing smooth pop and soulful vocals. The M49 gained notoriety capturing the distinct vocals of Bob Dylan, Miles Davis, Billie Holliday, and the Beatles ´Help´ overdubs. Additionally, it is considered the classical orchestra workhorse. Renowned for the lush vocal sounds of the 50s, Advanced Audio's CM49 touts the same natural and accurate reproduction, but captures a more refined high-end and smooth bottom-end.
The CM49 uses Advanced's hand-assembled AK47 capsule. The capsule is a 32mm OD dual diaphragm, single back-plate, center-fed design. Although they originally called the capsule a K49, it is an exact reproduction of the early Neumann K47 from the late 50s (the capsule used in the M49). Each capsule is hand-inspected and tested by Advanced Audio techs. Advanced Audio capsules use 6 micron thick, gold-sputtered mylar.
By using Advanced Audio's modern 2-stage tube mic circuitry, the CM49 has a much lower output impedance, yielding more headroom than the original. The hand-selected Electro Harmonix 6072a valve is one of the quietest hi-fi tubes available.
The output transformer is Advanced's own custom-wound BV18 transformer. This dual bobbin transformer has bi-metal (a mixture of iron and nickel) laminations. It provides very fast damping, resulting in a clear, undistorted transient response. The 8:1 ratio windings, along with the dual-stage circuit, deliver >+10 dBu, with less than 1% of distortion.
- Pattern Selection: 9 patterns switched from the power supply
- Circuit type: Class A 2 stage CCDA tube circuit, transformer coupled
- Capsule: 32mm singleback-plate, 6-micron mylar skinned diaphragms
- Capsule Polarization: 60V in cardioid to back-plate
- Tube type: socketed 9-pin, selected 6072a dual triode
- Transformer: BV18 dual bobbin custom 8:1 ratio with bi-metal laminations
- Transformer distortion: <1% @20 Hz/+10 dBu and <0.05% @50 Hz/+10 dBu
- Equivalent Noise Level: <14 dB (A- weighted)
- S/N Ratio: >85 dB (Ref 1 Pa A-weighted)
|Package Contents||CM49 mic, shock mount, 25' gold pin, 7-pin cable, foam pop filter, 9-pattern power supply, power cable, and travel case|
|Tube or Solid State||Tube|
|Number of Microphones||Single Microphone|
|Impedance||<200 Ohms (load impedance <1.2 kOhms)|
|Frequency Range||25 Hz - 20 kHz (±3 dB)|
|Sensitivity||-34 dBV/Pa (20 mV)|
|Max. SPL||128 dB|
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