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Well, I think I've sold my Infinity RS IIIa speakers. I've had them listed on craigslist and Audiogon for about 3 months. There was a guy in KS that had to have them, and then he ghosted me. I'm supposed to meet up with another gentleman when he returns from vacation. I hope the sale goes through, because I can deliver them to Osage Beach MO. That gives me an excuse to eat at my favorite BBQ joint in MO, Half Sauced BBQ. https://halfsauced.com/ Now, as much as I like my NHT 3.3s, I'm considering parting ways with them. I don't know how serious I am though. They're the main fronts in my HT setup, and if I do sell them, I want t replace them with some Martin Logan ESL's that are at least one bump up from the ones in my 2.1 channel system, and those won't be cheap. I wouldn't let the NHT's go cheap either. Like I said, I like the NHTs very much, I just like the Martin Logan ESL sound more.

I've listed them a couple of times at $500 or best offer. I had one seller that "had to have them" at my asking price. I offered to deliver them, and we agreed to a date the following week. I never heard from him again, and I sent 3 emails with my phone number. I never got a reply. This recent buyer and I chatted on the phone for over an hour. He's a vintage gear collector, and he owns a few pieces of Carver gear. He said he can't find anyone to work on his Carver gear as no one understands it. I told him about @Nahash5150 , Nelion Audio, and I invited him to thecarversite.com. He and his wife are vacationing in Mexico this week, and he said he'd call when they get back. I'll call him in case he forgets. The agreed deal is I'll deliver them to him for $500, and he insisted on taking me to lunch or dinner at Half Sauced. Who am I to refuse the best BBQ in Missouri? I don't have any dislikes about the Infinity's, and I love their appearance. The scalloped edges, tall, thin, gorgeous in my opinion. They're a very good speaker with very good highs, mids and bass, but I have a couple of sets of outstanding speakers. I just really have no need for the Infinity's, and they take up quite a bit of space. One friend of mine likes them better than my Martin Logans. I tell him he's been riding Harley's and shooting guns without ear protection for far too long. He has a Pioneer Spec I or II setup with Pioneer HPM 150 speakers that he plays at almost full volume in a room with solid wood walls and no treatments. It's very bright in there, but he loves it, and that's all that matters even if no one else does.

I have the Carver C9 that worked really great if you used a tape measure to set speakers and the listening chair or couch in my life. Although it just today decided to start blowing the 1/8 amp fuse when the engage button was used. Possibly a direct short the way it blew. I was just interested in tinkering with the free Carver SH if instructions could be found. I’m 72 and disabled from the army so I have lots of spare time so I’m getting back into electronics and experimenting.

I've never heard any of the Kappa series speakers, and I like the RS IIIa's, just not enough to keep them any longer. The NHT 3.3s are a level up (or two), and the Martin Logans are just perfect for my old ears.

Coming late to this party, obviously - but if I recall, the original germ of this idea came from David Hafler when he was a designer for Dynaco. It was in Stereo Review back in the late 70's where I recall reading it as well. Here is the wiki link: Hafler Circuit

There was a time not too long ago (10-12 years) that I was flat out in love with the “Infinity sound”. I had acquired two pair of Kappa 9, and I thought I was set for life. Then, gradually over time, I grew to detest the infinity sound. Both pair of Kappa 9, a pair of Kappa 8 and a pair of Kappa 6 (the 8&6 at friends homes) all sounded hash in the highs, chesty in the mids, and boomy in the bass. i know the speakers didn’t change, but rather my taste changed. I gave one pair of the Kappa 9 to a dear friend, and after several listings (going as low as $800) I parted out the remaining pair for about $1,800 total. at this moment I cannot imagine a better speaker than the 3.3 for 2ch music - it just does everything right…. For me, and for NOW. Will my taste change again? I doubt it, but who knows…

Heaven Is A Place On Earth - Belinda Carlisle

Thank you for your service also @Half Life. It’s good to hear from others who served. The Audio magazine with the article by Bob Carver on pages 26 to 35 explains the reasoning behind the sonic hologram and touches on what I remember about using two extra speakers crossfed canceling signals rings a bell. I remember having two smaller speakers a little closer to the listening chair/couch and I vaguely remember the crossfed signals. While this is the basic setup in this magazine it is not the one I remember. I have been searching all day trying to find that exact article. I’m glad you found this article because it rocked my sometimes dormant mind into remembering. The one I remember was an article with him explaining it and going deeper into the setup and then saying he gives anyone who sets one up the right to use it free of charge as long as it was for personal use only.

Both of those reads were like an old memory. I didn't read much of anything but was reminded of everything way back then. Chrome tapes, cassette decks, what was the beginning for me of digital products coming on board, and oh yah, that Carver stuff, including the explanation of Magnetic Field Amplification! Man, that stuff was all hidden in my memory until I started rolling through the pages. I couldn't tell whether the drawing/schematic of the build it yourself SH was true to form as compared to the Carver, because as soon as somebody adds tape ins/outs, more switches stuff like that I tend to lose focus. It does appear however, that the same process was intended using phase reversal, a bit of delay, and cancellation, though I did not see cancellation in the drawing specifically. My bad though, like I said glancing at these circuits, I get lost pretty quick. Jeffs has got it down for his DIY unit, and one of the best aspects about it is the remote control for the SH effect switched in or out. That is a big deal. Now if someone would just provide a 'volume' knob to the whole thing that lets you choose the amount of SH I would be crazy about it.

Oops, sorry about the confusion. As far as sales go, who knows what will happen until cash is in hand. I would like to replace the NHT 3.3s with ESL 9's or ESL X's.

Patricia Barber, Cafe Blue (album)

Did some digging and came up with two possibilities of what you may have read back then. Not sure if either of these are what you remember but they may be close. https://www.worldradiohistory.com/Archive-All-Audio/Archive-Audio/80s/Audio-1982-03.pdf Bob Carver’s “Sonic Holography” article — Audio magazine (March 1982) pages 26-35 https://www.worldradiohistory.com/Archive-Radio-Electronics/80s/1982/Radio-Electronics-1982-06.pdf “Build Your Own Stereo Image Expander” — Radio-Electronics (June 1982) pages 45-48

Retired federal judge in Maryland. Have been listening to classical music for 60years. Own a Carver “The Receiver” (MXR-130) purchased at the Fort Belvoir PX in 1989. It now runs a Music Hall MMF-5 turntable, a NAD C521BEE CD player, and Salk Song Tower speakers.

Hopefully this is an acceptable question. Back in the late 70’s or early 80’s or so Bob Carver published instructions on how to make your own sonic hologram and gave license to do it and use it. That is what started me buying his equipment. I owned a lot of Carver equipment starting with Phase Linear and then his own named equipment. I used his instructions to experiment and to make my own and wondered if anyone else did and if those instructions are still available. I looked through the site and didn’t see anything though I could have missed it.

Ha ha! I think more than a few of us suffer from similar degradation. I worked in a factory for several years and shoulda been better at wearing my ear plugs. And, of course, there's now this persistent age related roar of tinnitus I deal with. I'm sure someone with better ears would listen to my system and wonder what the hell I'm hearing!

Naughty Girls Need Love Too - Samantha Fox

Hungry Eyes - Eric Carmen (The Raspberries)

I'll try to dig some more. I'll see if an AI, like ChatGPT can help narrow this down a bit.

So Emotional - Whitney Houston

The Go Go's We Got The Beat

When I saw the title, I said noooooo! I thought you were leaving the site. Then I read the post. Phew! Good luck with the sale! I hope it goes through for you. While I've not heard the ML ESL's, I truly love my ML Motion Towers. For me, they sound awesome! The realism is really damn good. Especially for things like Joan Armatrading, Rippingtons, Santana, and so on. Wish you luck on getting the ESL's!

Thank you all. It is much appreciated by me and all the others who serve/served. Always great to hear.

Good for you Richard! I hope everything works out!!!

Ah, the Quad era of audio. It could have had promise but as usual everyone made a different format. The beauty of Bob's design was doing this with only two speakers and no special recordings required except that they be stereo and two mics I think? Yes AJ, the H9-AV was a unique product, that is for sure. I only used it as two channel myself, but thought that it might have some merit over the C-9 in that you could adjust the matrix control. I only used it at about the 9 o'clock position though, because more resulted in too much of a good thing.

@jmcipale yes. That is basically what I remember from Bob Carvers article. Almost 50 years has dulled my memory but it does look a lot like what I can remember. But something is missing in my mind about Carvers article. I think the 60’s and 70’s was harder on me than I remember 😂 thanks for the posting this