Taperssection.com

Gear / Technical Help => Battery Boxes, Preamps, Mixers, ADCs, and Processors => Topic started by: jmz93 on October 04, 2011, 12:22:26 AM

Title: CA9100 preamp bass filter specs?
Post by: jmz93 on October 04, 2011, 12:22:26 AM

Hi folks. What is the approximate low-end shelf of the bass filter in Church Audio's 9100 preamp? I'm looking for the corner freq and slope of the shelf. Thanks much,
Chris.

Title: Re: CA9100 preamp bass filter specs?
Post by: vanark on October 04, 2011, 06:50:06 AM

http://taperssection.com/index.php?topic=137319.msg1846936#msg1846936

Quote from: Church-Audio on February 26, 2011, 02:43:09 PM

The roll off starts at 100hz and its about 30 db down at 20hz when its on.

Title: Re: CA9100 preamp bass filter specs?
Post by: hi and lo on October 04, 2011, 10:31:41 AM

For what input impedance?

Title: Re: CA9100 preamp bass filter specs?
Post by: fmaderjr on October 04, 2011, 03:09:00 PM

Quote from: hi and lo on October 04, 2011, 10:31:41 AM

For what input impedance?

According to Chris (copied from an earlier post):
The high pass filter is in the input stage of the preamp and thus no issues with what ever recorder its connected to.

Therefore Chris' HPF does a constant rolloff no matter what recorder is used. This is much better than the system used by Sound Pro's battery boxes that have roll offs that change radically depending on the impedance of the recorder's input.

Title: Re: CA9100 preamp bass filter specs?
Post by: Church-Audio on October 05, 2011, 06:22:23 PM

Quote from: vanark on October 04, 2011, 06:50:06 AM

http://taperssection.com/index.php?topic=137319.msg1846936#msg1846936

Quote from: Church-Audio on February 26, 2011, 02:43:09 PM

The roll off starts at 100hz and its about 30 db down at 20hz when its on.

That is correct.

Chris