Need help with dating Dunlavy SC4's

Don't know the age but he worked making stuff for the military.amir did a great interview with him you should search for that. He tweaked every speaker in his sound lab in Colorado prior to shipping them. I have the sc 5,sc6 and 2002. They are big heavy and sound great to this day. There are some forums that have heavily modified his speakers. He did first order crossovers and had patterns on the felt around the speakers   long live the legacy of that engineer.enjoy the music.

@viridian  I completely apologize! In my sleepy state I failed to immediately associate your name to the previous and very helpful post. Also sorry I misinterpreted your humor. These threads can easily turn heated with differences of opinion. I was only trying to avoid that. In the future, please continue to add your input to my posts. I've read many of your replies and you always add important info. Although it can be sometimes hard to interpret humor with just the written word, but I will try and lighten up. My apologies, and thanks again for your info.

@judsauce, A little more history since there seems to be some interest.

John Dunlavy studied engineering and developed new theory for and helped design antennas for the military prior to building speakers.  He opened Duntech Audio in Texas with a stand/wall mounted model which may have been reviewed in Audio magazine by Bert Whyte.  Soon after (sorry I don't have dates) John moved to Australia and began building large floor standing models. TOTL was the Sovereign,  followed by the Princess, my model.  Mine were 5-driver, 3-way, in a WMTMW vertical array.  They were 6' tall and weighed 180 pounds each.  John was a proponent for time and phase alignment so designed all his speakers with that.  

I had the Princess for 19 years so learned a bit about them  They were rated at 90 dB efficiency but that was optimistic.  I tried many amps over the years and the best were Parasound mono JC-1s, rated at 800 watts into 4 ohms.  After several years I noted a scraping sound which was resolved by rotating all 4 woofers 180 degrees.  Eventually I had three friends who also owned Princess so I learned they required a large room to sound their best, with some distance from front and side walls.  I sold them only because of a pending move but I still miss them.

I had the good fortune of speaking with John a couple different times at the CES in Vegas.  That was after he opened DAL.  Most of that model line up was similar to the Duntech line.  My Princess were siblings to the SC-IV and IVa.

@viridian, You might lighten up a bit here.  I had the same initial impression as judsauce with your vented comment.  You have a history of knowledgable and helpful posts so that one surprised me.  Obviously I too missed your humor.

@mark200mph  Thanks for your post!  I did not know that John made stuff for the military, although it does not surprise me. His design mentality would work well for military specs. You sure have your hands full with the 5's and the 6's. Glad you are still enjoying them, as I am with my 3's.

@pryso   Again, can't thank you enough for all of the in-depth information. I appreciate the time that you spent putting that little bio together.  I just bought a pair of modified SC4's, whose serial numbers I am exploring (the seller didn't remember the model year). 

Just a little back history of my discovery of the Dunlavy line: I was shopping for some new speakers at a shop called The Audio Den, on Long Island, ny (1998).  I came across a pair of SC3's, demos, and asked to hear them.  They put on an ECM cd of a European guitarist that I had known of but hadn't kept up to date on his releases.  The guitarist was Terje Rypdal, the cd was titled, If Mountains could sing, produced by Manfred Eicher, the song title: The return of Per Ulv. After the first few seconds, my jaw practically dropped to the floor: the air, the depth, the tightness, the speed, the articulation, and the sense of breath and clarity throughout the frequency spectrum just knocked me out.  And the snare drum was so crisp and clear with a hint of reverb that made it sound from outer space.  I bought them on the spot and still have them to this day. The new 4's are in my main system, the 3's in my lower man cave system.

A couple of years later my left tweeter began to intermittently buzz.  My experience with customer service at the time, probably 3 years before the shut down, 2 years before they were sold, was in step with their product: stellar.  At the time a man named Andrew Rigby took care of me in the usual Dunlavy quality level fashion.  He did not send me just one tweeter replacement, but a matched pair!!! That could be one of the reasons they went out of business, not sure.  Turned out it was a sticky voice coil.

Very sorry for this long-winded reply.  But since you were/are such a fan of the line, and you even talked to John himself, I thought that maybe you'd be interested in my little history being introduced to the line.

Thanks again for all of your info!!!