Stein Music Speaker Match

On the Duevel Bella Lunas they are well worth the money

I have Martin Logan Prodigy speakers, and the stat panels
and woofers are now "as one," beautifully integrated.
It requires two sets of Steins per speaker, but they are well worth it.
I wipe them with anti-static fluid periodically and this enhances the benefit.
For me, they are definitely "keepers!"

That's a complex one: obviously the Bybees are expensive but their benefits go beyond what the Steins can do. Other than removing treble hash and better resolution they give the music flow. I think it comes down to a much better capture of leading edge impulses (zap) and decay (reverb). The Bybees are expensive but in a resolving system downright irreplaceable. While the Steins do a good job at removing hash and improving resolution they actually benefit from being combined with the Bybees in a 1+1=3 way. To make the thing downright confusing WA speaker chips and Audioquest ground controls do their own thing in addition to the other two, all good but obviously at risk of being seen as over the top;-)

I have two pair on my Joseph Audio speakers with Bybee devices (2 pair in each speaker) built in.

This combination along with Bybee devices in the electronics have been completely transforming as they are with Bob Levi's systems as described in his Speaker Match review in Positive Feedback wherein he posed the question "Are Speaker Match Devices audio's Holly Grail?" I also have Synergistic Research Speaker Cells which restore dynamics and provide amazing "slam" for both micro and macro dynamics that bring startling reality to the sound of instruments and voices.

Billinoc,
Interesting -- because my system is much like yours. I have the Joseph Audio Pulsars with Bybee speaker bullets and SR speaker cells. I also have a Steinmusic Harmonizer, 2 Schumann resonance devices and a QRT Symphony Pro on top of each speaker with a couple of proprietary DIY tweaks added. The Stein Speaker Match Plus have added nothing to the sound in my system. They have actually constricted it. They are obviously very system dependent.