Fullrangedriver Forum

Hi Guys
I recently moved to a home with a large living room on 2-1/2 acres and I can now play my Beta 12lta Afterburners as loud as I want. The speakers were designed, tested and tuned for a much smaller room and in close proximity to other peoples living space so I was never able to really crank them up very much.
Lately I had noticed that at louder playing levels the mid bass became muddy and the speakers just didn't sound quite right. I started moving them around the room a bit and eventually found that they sounded best when removed from the walls about 2 feet or so. But still at full blast they sounded a bit muddy and they had a drone to them that I hadn't noticed before. I stuffed a couple of bath towels through the 4" port and placed them on floor of the cabinet. The droneing was less pronounce so I knew that I was experienceing a standing wave condition between the floor and ceiling of the enclosure but the muddyness was still there.
I decided to open up the back panels of the cabinets and re-evaluate the amount and placement of stuffing inside. I had lined all of the walls with at least 3/4" of Quilt batting and had hung a curtin of felt and batting from the top front edge to the rear edge of the window brace just below the driver which had worked to stop the standing waves in the smaller room. This time I had a pair of decorative pillows on my sofa and since I really don't like decorative pillows I stuffed one in each cabinet directly behind and above the driver at a 45 degree angle. A few well place staples and they were secure. After installing the back panels I cranked it up and both the midbass muddyness was gone and there was no droneing at all.
Lesson Learned???? Yes! The cheap dacron filled decorative pillows sold at Wal-Mart are a very good fix for cabinet standing wave problems and bass backwave echoing through the cone from the inside of the cabinet. This is a highly recommended tweak plus it gets rid of two less than handsome sofa pillows.
Best Wishes
Ron Brady