Top-of-the-line Speaker Match Plus's with Banana PlugsThese are in excellent condition, indistinguishable from new in a beautiful walnut finish.
I had bought two pairs and now only need to keep one pair.
They will be sent insured, trackable USPS Priority Mail from Anaheim Hills, CA 92807 on receipt of PayPal payment/ good funds. SELLING FOR: $OLD shipped. 
Stein Music Speaker Match Plus - A Quick Look!
by Robert H. Levi, Positive Feedback Issue 65, January/ February 2013
Stein Music has done it again! Taken something good, and made it much better!
A real upgrade over the original and effective Speaker Matches comes with the arrival of the more elegant and expensive Speaker Match Plus…one that is definitely better than the original! Eliminating EMF would have major benefits in improving your amplifier’s control of the speaker drivers, and would result in a dramatic improvement in definition and lower noise. The original Matches did the job well with most speakers, regardless of size or cost. The new model is a sonic jump forward into the land of live music. Holger Stein has outdone himself.
If you are using the original Matches, the new Plus model will improve the focus, power, and musicality about 20% more. This German-trained engineer, physicist, and audiophile has quite a track record with audio components which are astoundingly effective at remedying all kinds of audio and system problems. The Speaker Match Plus may be his most extraordinary creation to date. The relationship between speaker and amplifier is largely unexplored territory… thankfully not by Stein Music!
Let’s examine the device. The Speaker Match Plus is a modest sized capacitor shaped unit constructed of American walnut, made in Germany, with two wires protruding from one end. The wires are tipped with gold Swiss made hollow banana plugs. They are designed to fit standard banana connectors on your speakers and, if necessary, stack with banana connectors from your speaker cables. The red connector goes on the plus binding post and the black connector on the ground post. They hook up in parallel to the speaker cables. You need one for each pair of binding posts in use. If bi-wiring, you will need four. If not, only two. Hookup is intuitive, easy, and fast.
The Sound with the Speaker Match Plus
I tried them on every speaker with the original Speaker Matches and there was an instant significant improvement across the board. On speakers without matches, I found two that did not appear to need them. The sound did change, but seemed to move sideways instead of forward. I cannot find any consistent reason why the new version—or even the original version—did not improve things on those occasions.
The overall improvement one hears with the new Matches actually reducing or eliminating EMF is a wonderful thing. You will hear an instant increase in volume, smoother highs and mids, deeper bass, and wider separation of instruments.
Also, phase distortion seems lower and is no longer veiling the imaging. As a general rule, the more revealing the system, the bigger the results. The Stein Speaker Match Plus sell for $750 per pair; remember that two pair are what you will need for bi-wired speakers.
Quibbles?
None. When they are beneficial, you will sell your first born to buy them. Otherwise, return them.
Summary
The cool new Stein Music Speaker Match Plus is the important accessory that will help to send your top system to the moon! Hear more music, more naturally than ever before. Agreed: they are not so inexpensive, but I think that they’re really worth the investment.
The Stein Music Speaker Match Plus is easy to use, and is "set and forget." They never wear out.
In my opinion, this is THE BEST high-end audiophile accessory ever, my friends. Bravo Stein Music.
Price: USD $750 per pair
Holger Stein on the
basic Stein Music's Speaker Match concept:
"Speaker Matches are based on an old idea that we tried already more than 20 years ago using a Zobel filter, made of best and most expensive components available. This already made a big difference to the sound as compared to standard parts normally used in commercial versions. We spent a lot of time to find a universal approach, which would work perfectly in all kind of constellations. In the beginning I didn't expect that we'd be successful but eventually we found a solution. Ten years later we further developed the already very good design, just by molding the internal parts into a special designed casting compound, which was not dampening but stabilizing the total performance in a big way.
Zobels are well known for their positive effect on the sound. They may reduce high frequency distortion and inter-modulation created by other electrical devices used at the same location with the sound system, such as energy saving lamps, computers, refrigerators, etc.
Speaker Matches also benefit from Steinmusic RCS (Resonance Control System) in Audio Electronics. Let me explain. All electronic circuits using resistors will generate heat when current is flowing. Heat is generated independently of the topology, and most of the time one will not even remark it, but it's a fact. Heat is nothing but the movement of the atoms in a material. In audio circuits, movements of atoms are produced by the music signal. Depending on the materials used, dimensions and structure of the surface, these movements create specific (material) resonances. These resonances will have an impact onto the current flow through the resistor, which is nothing else but the musical signal that we want to keep undistorted.
The typical approach here is to dampen the resonances. That is not our idea, absolutely not. Our experience shows that such dampening withdraws musical energy, which is exactly what we at Stein Music don't want to happen. Dampening often results in a pleasant but dull sound, where many details and finesses get lost.
Another approach is to stabilize the environment, for example casting the parts into concrete. We tried and found that the sound indeed gets stabilized, but also becomes sensitive to the character of the material used, quite like with acoustic instruments in which the sonic signature of the material is always heard. Concrete gives a pretty hard sound, wood is softer and more pleasant sounding depending on the wood used. More natural sounding materials will lead to a more natural sound also in electronics.
For the Speaker Match we're using a combination of a special casting compound that is optimized with regard to its sonic properties, together with a cardboard housing that is soaked with a special resonance optimizing lacquer. The casting compound ensures that all surfaces of the components are completely encased, the treated cardboard provides a good outer surface. The quality of the outer surface is very important, as it is this surface from where all internal resonances are reflected back into the material. So the character of the surface always has a big impact onto the overall resonance pattern.
What this special resonance controlling system does to the sound can be monitored by comparing the series version against one in which the only difference is that it doesn’t have the special compound used. The positive effect of the Steinmusic RCS can be easily be detected: the sound is much clearer, smoother and more detailed.
