Join Date: Sep 2001
Location: Carson City, NV (gave up on SoCal)
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My speakers are really nice, but they are out of production and were relatively rare to start with, so most people have never seen or heard them. The front speakers are floor standing units made by Bohlender-Graebener; they have twin 6 inch bass-midrange drivers, but the real secret to their very lifelike sound is the use of a 4 inch high planar-magnetic tweeter that is mounted at the seated-ear level. These tweeters have very fast transient response times (like an electrostatic design), but none of the drawbacks of the more complex electrostatics. Electrostatic tweeters can be pretty hard to mate up with the lower frequency dynamic drivers in a two way or a three way speaker design. I also have a single powered subwoofer, with a 10 inch bass unit in it. I am very happy with the overall sound, but the NR717 made a noticeable difference in my setup. I was moving from some pretty high end separates (amp, pre-amp, and tuner), so I was surprised about the sound quality of the Onkyo. I originally bought it for a bedroom receiver, but after trying it out on my main living room system, I retired my separates...
Whether or not a second subwoofer will help your sound out depends mostly on your room dimensions and layout. I am not an expert, but you want to avoid standing waves, which might be helped or hurt by the presence of a second subwoofer. If you can work a "happy or money-back" deal on the second subwoofer, I'd give that try.