In one of our threads the issue came up about whether the Yung SD-200 plate amp has a subsonic filter. In the "Questions and Answers" section on the Parts Express website, someone posted the amp does not have a sub sonic filter.
I heard that it did, so to clarify the issue I went to the source, http://www.yung.com.tw/
I asked: Does the SD-200 has a sub sonic filter, and if so, at what frequency.
The reply was All of our SD-series amplifiers have a sub sonic filter. The working frequency is 30Hz.
I thought it was a mistake and replied: You must mean the sub sonic filter is 20hz, am I correct?
The reply was Our engineer advised that the subsonic filter is 30 hz on all SD-series amplifiers.
EDIT
A Rep from P.E. has stated that the amps are (supposedly) flat to 30 hz and 3 db down at 21 hz, but this needs to be verified.
http://www.parts-express.com/term/yung?srch=yung
I heard that it did, so to clarify the issue I went to the source, http://www.yung.com.tw/
I asked: Does the SD-200 has a sub sonic filter, and if so, at what frequency.
The reply was All of our SD-series amplifiers have a sub sonic filter. The working frequency is 30Hz.
I thought it was a mistake and replied: You must mean the sub sonic filter is 20hz, am I correct?
The reply was Our engineer advised that the subsonic filter is 30 hz on all SD-series amplifiers.
EDIT
A Rep from P.E. has stated that the amps are (supposedly) flat to 30 hz and 3 db down at 21 hz, but this needs to be verified.
http://www.parts-express.com/term/yung?srch=yung