Test Blog Content
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I mentioned in our first post that the LA 610 and the original “green” 610 aren’t really the same design. There are similarities, yes. But the differences between them are very important in our opinion. So now that we have functional T4B modules inside our friend’s pair of LA 610′s, it’s time to start making the mic preamp into as much a copy of the original as we can.
The LA 610 testing is complete,so I’m going to start planning changes to the circuitry. I feel the best course of action is to copy the old green UA610 console design.… read more
There are a couple of ways to test the LA 610′s frequency response. The traditional method is by using a swept tone. The other is by using an impulse response, or “chirp” as the good folks at Audio Precision call it…. read more
Yesterday I wrote about the LA 610 ITU-R IMD test. Today I’m going to discuss the 60Hz/7kHz SMPTE IMD test for the LA 610. Like its brother test, SMPTE IMD shows a device’s performance under complex signal conditions, as well as its non-harmonic distortion performance. It gives us some idea of whether the device under test has harsh or unmusical qualities.
There are a few different ways to test the LA 610 for IMD.
My preferences lie with 19kHz/20kHz ITU-R and 60Hz/7kHz SMPTE IMD…. read more
Today I started performing basic THD+N and SNR tests for the LA610′s.… read more
This summer a friend approached us about a mod for his pair of LA610′s. The LA610 has become an almost iconic channel strip in today’s recording world.… read more