Yung SD200-6 200W Class D Subwoofer Plate Amplifier Module with 6 dB at 35 Hz

I just needed to use a jig saw to enlarge the opening on the Infinity BU-120 sub woofer box for the Yung amp to fit in. I have had the Yung amplifier for a few months and it sounds good plus it does not get nearly as warm as the original Infinity plate amp.15-Oct-2022 update: This plate amp is still working. Sounds better than the original Infinity plate amp.

I previously purchased the 300-watt SD-300 and 200-watt SD-200 versions, and got good results with both. I do not mount units like this in the subwoofer enclosures I have built, both because my designs involve sonotube cylinder designs, and also because I always am considering the potential for the internal vibrations to shake something loose down the line. Consequently, I mount them in outboard enclosures that can be hidden away. The enclosures are also spiffy enough to be visible when setting beside the woofer or equipment rack. I sell these cylinder-style subs, and do not want dissatisfied customers.Anyway, I purchased the SD-200-6 version a short while back, because I intended to use it with a smaller subwoofer (two 8-inch drivers (one on top, facing up, one on the bottom, also facing up, resulting in a sealed-box push/pull distortion-reducing arrangement) and needed the 6 dB boost to extend the response downward below standard driver resonance.Before connecting ANY sub amp to an actual driver I always check it out with a feed to my AudioControl 3051 RTA and when I did that this time the unit went wild and started buzzing inside of its new enclosure. After a couple of more tries the thing shut down and refused to come back on. (Thankfully, the RTA was undamaged; a toughie that RTA.) I had some suspicions even before I installed it in the enclosure, because there were internal parts that looked rather shoddy, compared to the SD-200 version, and I think those shoddy areas were where the unit had been modified by either the supplier or the factory to offer up the 6 dB boost. I have sent it back to the supplier and have ordered the more standard SD-200 in its place. I have a small Hsu Research "optimizer" equalizer on hand and I will use it to extend the bass. The optimizer actually boosts at 25 Hz, so the final result will be better than what the SD200-6 could deliver.The question now is: will the replacement SD200 be problem free? I hope so.I got the replacement, and it has worked fine for several years, and is still fine.Howard Ferstler

I used this amp to upgrade an unamplified sub woofer that came with a long ago discarded home theater in a box. It had a 300W max 4 ohm driver in an enclosure made of MDF, but it was unamplified. The real vendor, Parts Express, has a data sheet that includes the actual hole size to cut. I used an oscillating tool to cut the hole and dropped this unit in and hooked it up. I've only used it a little bit so far, but it is working well. My only complaint is that it does not come with mounting screws. It requires 10 small screws of approximately 5/8 inch, preferably black, to mount.

Replaced a sub-amp in a JBL 10" with this one and after modifying the cabinet - it works great. Instead of removing the original sub amp, I just cut a hole in the adjacent panel for the new one and left the old one in place - speaker wires attached perfectly.

200 w @ 4ohms 61/2" x 71/4 '' plate.. I cut a hole in my existing plate with cutter wheel on high speed grinder and mounted new onto old. Knobs work and there is a cord!

Works great so far. Very powerful. I only have a cheap 10 hooked to this and mounted in my drywall. I keep the level just above 0 to prevent excessive rattling.

Works perfectly

Excellent I love the bass boost I highly recommend it so far so good