Just finished installing the rear tweeters to my Orions a couple of days ago. At first, I wasn't sure of what difference they make, yet in a short time the most apparent difference is the soundstage, more dimensional, voluminous, with a greater sense of space. I started with the pots on the ASP turned down 1 dB as recommended, then 1.5. The balance seemed better at 1.5. I may still do some futzing with the pot setting, but I suspect the -1.5 dB may be the settling point.
Other observations were, greater presence, more enveloping (wraparound), and a higher soundstage. Without the rear tweeter, it was like looking down slightly at the stage. Now the stage is directly straight in front. The clarity and separation of instruments seems better and the center image strongerimaging in general seems more stable. I've found that I'm setting the volume 3 dB lower with my standard set of audition CDs.
I've not done an A/B comparison. It's not easy to disconnect the rear tweeter without removing it. That would reliably reveal the differences. I've only listened for a few hours, and it may take several more to really fully assess the changes. So far I'm pleased with the upgrade. Nothing has diminished, and there are certainly some notable improvements.
Other observations were, greater presence, more enveloping (wraparound), and a higher soundstage. Without the rear tweeter, it was like looking down slightly at the stage. Now the stage is directly straight in front. The clarity and separation of instruments seems better and the center image strongerimaging in general seems more stable. I've found that I'm setting the volume 3 dB lower with my standard set of audition CDs.
I've not done an A/B comparison. It's not easy to disconnect the rear tweeter without removing it. That would reliably reveal the differences. I've only listened for a few hours, and it may take several more to really fully assess the changes. So far I'm pleased with the upgrade. Nothing has diminished, and there are certainly some notable improvements.