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Description

The AM51 was one of the first microphones released by GT Electronics, the analog product division created when Alesis acquired Groove Tubes. It is a fixed Cardioid FET condenser with switchable pad and filter and transformer output, and was billed as an all-purpose studio condenser. The capsule is the same as was found in all the Groove Tubes large-diaphragm models, a ~33mm K67 derivative with a resonator disk attached to the active diaphragm to smooth out the high-frequency response. AM51 PCBThe circuit is a Class A JFET design with an output transformer. It has high gain (32mV/Pa) and relatively high self-noise (22dBA); these characteristics were common to all Groove Tubes and Alesis/GT condensers. Switches on the mic independently enable a pad (-10dB) and high-pass filter (12dB/octave at 75Hz).

Discussions

Any Groove Tubes experts out there?

Disagree! I still use my GT AM-51 as my main male vox mic. It's just a little hyped in the highs, which makes it rather uncool for many female voices. I do have Brauner, AKG, Sony, Rode others to compare. As you said...every mic has it's purpose! I also know the AM61 which was the tube model...

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Low end mics and pres today compared to 10-15 years ago?

...lot of cheap stuff being made that isn't very good. For example, you could probably do better than the Alesis AM51 for the same price you originally paid. But then again, you could have also gotten a better mic for that price back then.

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Low end mics and pres today compared to 10-15 years ago?

SO true, I didn't know any better back then! I would never go in to GC nowadays and ask "what should I get", I know now to do my homework and how to find a good deal, and what a good deal should look like. Perhaps an increased level of experience has completely skewed my...

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Reviews

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