Quote:
Originally Posted by Beyersound  Hi Michael, I think that in the 77/76 mics MXL either used a non-K67 capsule, or did a good job of de-emphasis on them. They are both have transformers as well. I own a V76t as I said earlier, and it is not sibilant or even noticeably bright.  |
The MXL77 has a very nice sound. It was one of the best tube mics MXL built. The mic was made by 797 in China and has a plate follower circuit that is similar to the 1/2 of the AKG C24 (stereo C12). That circuit is a fixed bias vs the C12 self bias. The Nady 1100 shares the same circuit and transformer as the MXL V77.
The capsule is a 797 Audio K67 type capsule these sound better than some of the current K67 capsules.
The transformer in the V77/1100 is larger than the typical Chinese mic. The transformers in these tube mics are an important part of the total sound. This mic transformer has a decent sound. In most other Chinese mics they can be upgraded with different transformer.
In the MXL V77/1100, the transformer coupling cap is an electrolytic cap that can be switched out to a high quality film cap. I like to use the GE 5 star 6072a in these mics.
I always replace the electrolytics in the mic and rebuild the power supply with high quality Elna, Nichicon, Rubycon or Black Gates.
The V76, basically shares the same circuit as the MXL 9000. These mics are also plate follower circuits. This mic uses a 9pf plate to grid feedback to tame the K67 capsule. The transformer coupling capacitor is a 33UF cap bypassed with a .1 uf film cap. I replace this configuration with a better film cap.
These mics can improve with a transformer change.
Best,
Jim Jacobsen
JJ Audio
Custom Microphones and Mods