CM48T

Description

Advanced Audio CM48T

Our 3-pattern tube microphone is based on the vintage U47 that in 1958 added a version called the U48 with CARDIOID and FIG 8.

In-studio testing, we have found it to be an excellent choice for vocals, over the drums, or on acoustic guitar. The CM48T can easily be put up on electric guitar or bass cabinet, on kick drum, and other high SPL sources, yielding great results.

Stay tuned for clips!

It is a perfect addition to any project studio as your first tube mic. It has been designed to work seamlessly in any serious commercial studio as well. You can buy a matched pair without breaking the bank!

If you’re looking for that vintage tube mic sound, in a smaller, amazingly affordable package, the Advanced Audio CM48T is that microphone at $595USD!

Circuit

Like the original circuit designs, we are using a pentode tube wired as a triode, but the use of modern, high tolerance components results in a far quieter, more reliable microphone.

The single class “A” tube circuit stage uses a GE/JAN 5654W sub-miniature 7 pin tube, Our custom-wound miniature BV8 transformer with the traditional 6.5:1 ratio yields outstanding headroom.

Capsule

We use our tried and true, AK47 capsule, the same used in our CM47ve, CM49, and CM47fetCE microphones. All Advanced Audio Microphones capsules are hand skinned using 6 microns, gold-sputtered mylar. Each capsule goes through rigorous testing here in our shop in Canada.

 

 

 

 

 

 

What’s in the box:

Advanced Audio CM48T Microphone

Switchable 120-220v power supply

25′ Gold plated 7 pin cable

Heavy-Duty, thread on the shock mount

Foam Pop filter

Your 2-year warranty card, if registered extends to 5 years of impeccable AA service.

All in a sturdy aluminum travel case

 

Tech Specs

Pattern Selector: 3 pattern; Omni, Cardioid and figure 8 from the microphone body

High Pass Filter: 120Hz (6dB/octave) activated from a rear toggle switch

Attenuation/PAD: -10dB activated from a rear toggle switch

Circuit type: Single stage class “A” tube, transformer coupled

Capsule: center fed AK47 (true K47 reproduction with brass surround).

Capsule Polarization: 60V with the rear diaphragm remaining passive in cardiod.

Tube type: socketed military grade selected GE/JAN 5654W

Transformer: Miniature BV8 dual bobbin with 6.5:1 ratio with iron laminations.

Transformer Distortion: <1%@20Hz/+10dBu and <0.05%@50Hz/+10dBu

Max SPL: 138dB (148dB with PAD)

Frequency response: 25Hz-20kHz + or – 3db

Equivalent Noise Level: <14dB (A- weighted)

S/N Ratio: >85dB (Ref. 1Pa A-weighted)

Sensitivity: -32dBu

Output impedance: <200 ohm (load impedance <1.2K)

Output connector: Male XLR, 7-pin gold plated

Body DM: 8.18″ long, 1.98″ diameter/ 208mm long, 50.5mm diameter

Switchable 120v-220v power supply

25′ Gold plated 7 pin cable

Heavy Duty shock-mount that threads onto the base.

Sturdy  travel case

 

Please do not hesitate to contact us if you have any questions – Let us help you capture your sound signature in its fullest detail.