Yung Plate Amp - Initial Impressions - Page 5 - AVS Forum
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post #121 of 126 Old 08-28-2014, 04:18 AM
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Originally Posted by garciab View Post
For Fc of 20Hz, q of .7, R8 = 25K, R23 = 50K

For Fc of 18Hz, q of .7, R8 = 28K, R23 = 56K

Notice the ratio of 1:2 for a Q of .7, which is maximally flat response. And you can see what happens to Fc as the resistor values increase.
Hi!

Jumping in a bit late. Just built a sub for the Dayton RSS265HO and the bottom end just is lacking. I use the Yung SD300 unboosted, and now I found the answer: it cuts below 30 Hz...!

To my question: what kind of resistors should I buy? Looking into the market there are so many different resistors. I think I'm aiming at 28/56K for an 18 Hz HPF

Later,
Ola
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post #122 of 126 Old 08-28-2014, 06:44 AM - Thread Starter
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You should be looking for SMD (surface mount device) resistors, size is 0805.
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post #123 of 126 Old 08-28-2014, 02:02 PM
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Originally Posted by garciab View Post
You should be looking for SMD (surface mount device) resistors, size is 0805.
Hey, quick reply there Thanks alot!
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post #124 of 126 Old 09-01-2014, 04:46 AM
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Hey, quick reply there Thanks alot!
Hey, what will happen with almost 2:1 matching, like 27k and 56k resistors? Can't find exact match for 25/50 or 28/56
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post #125 of 126 Old 09-02-2014, 06:32 AM - Thread Starter
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Just a very slightly different Fc and Q. Nothing you will notice. Go for it!

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post #126 of 126 Old 09-06-2014, 07:08 AM
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Ok. I think I wanna try a stronger amp in my very old, but barely used Velodyne F1200R. This is a servo controlled woofer in a sealed box. I sometimes get a flashing LED as the (100 watt) amp taps out on heavy material. Should I try the boosted 300 Yung? Also, I may leave the factory amp in place for now. Can I tap into the 2 leads going to the woofer and connect them to a set of binding posts on the cabinet, while leaving them connected the the old built-in amp? The idea being, if I plug nothing into the binding posts and power on the original amp, it will drive the woofer, but if I turn off (and unplug) the old built-in amp and plug the output of the new plate amp (mounts in a temp. case) into the binding posts, it will be driving the woofer. Would that work? Or should I just install a double set of posts which when connected together (red to red, black to black) would complete the woofer's connection to internal amp, and when not connected together, would allow hook up to the new, external amp. And I realize that bypassing the internal amp defeats the servo control. I haven't pulled the driver yet, but I imagine leaving the servo sensor in place, but unused, wouldn't cause any issues, yes? Thanks!!!

Last edited by g.costanza; 09-06-2014 at 07:11 AM.
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