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DIY hi-fi used to be an important aspect of audio magazine content 30 and more years ago, but these days it has migrated almost completely to the Internet, with just Ed Dell's <I>AudioXpress</I> magazine still waving the roll-your-own flag in print. Sharing a stand at RMAF were two of the Internet's most notable DIY engineers, Jan Didden from Holland (left) and Bob Cordell from New Jersey (right), and both were venturing into the print medium. Bob had advance copies of his new tome <I>Designing Audio Power Amplifiers</I> for sale, which I will be reviewing in <I>Stereophile</I> early in the New Year. Jan had the first volume of his new bookzine <I><A HREF="http://www.linearaudio.net">Linear Audio</A></I>, which has articles on audio design from Bob, as well as Doug Self, Joachim Gerhardt, Nelson Pass, Siegfried Linkwitz, and many others. But if you have any interest at all in the nuts and bolts of audio design, don't wait for my reviews of these books; check them out for yourself. There's audiophile gold within their pages!

Peachtree's David Solomon, seen here accosting <I>Stereophile</I>'s Stephen Mejias (right) in the hotel's coffee bar, was in ebullient mode. He's holding Peachtree Audio's new idAC ($999), which combines the usual 24/192kHz S/PDIF inputs with a 24/96-capable USB input and an iPod dock that, like the Peachtree iDecco amplifier that is favorably reviewed by Art Dudley in our December 2010 issue, takes the audio data from the iPod in digital form. The iDAC uses the latest version of ESS's 32-bit Sabre<SUP>32</SUP> D/A chip.

Due to all the positive reviews Emerald Physics loudspeakers have earned, it took several attempts over a three-day span until the crowds in the two Emerald Physics rooms had thinned down enough to allow a brief listen.

Boulder-based retailer Blu Note Design had a passive display in the Marriott's loby, but its active room on the second floor of the Tower was debuting the Avalon Transcendent speaker ($15,000/pair). One of my best sounds at the Show, the 2-way, 3-driver speakers were being driven by a Jeff Rowland Design Group 625 amplifier, a Jeff Rowland Corus preamp, an Ayre C-5XEmp disc player and QB-9 DAC, with Cardas Clear cabling.

New York-based Nola was showing its Metro Grand Reference speakers at RMAF ($25,000/pair). Combining a Raven ribbon tweeter and a 4" midrange, both mounted on an open baffle, with two 6.5" reflex-loaded woofers, this slim tower, driven by an Audio Research Reference 210 power amplfier, Reference 5 preamplifier, and CD8 CD player via Nordost cabling, produced more bass than I thought possible, given its modest drive-unit array. The response is specified as being 6dB down at a low 26Hz. This was one of several systems at RMAF using the Quantum QX4 AC treatment device from Nordost.

I was smitten by the sound of San Francisco-based dealer and distributor Tim Nguyen's Tone of Music equipment line-up at the California Audio Show. Tim's RMAF exhibit, which featured the Simon Yorke turntables he distributes, included the Simon Yorke S10 Record Player ($19,950), Convergent Audio Technology preamplifier ($9950) and Jl2 signature amp ($19,950), and Synergistic Research cabling. The big difference was the presence of the Lansche No.3 loudspeaker from Aaudio Imports ($30,000/pair in gloss black), a 2-way with 91dB sensitivity and frequency response of 40Hz&#150;150Hz (!) &#177;3dB.

<A HREF="http://blog.stereophile.com/rmaf2010/physical_sound_from_kaiser_gte_aud… in this blog</A>, Stephen Mejias enthuses about the Kaiser Kawero loudspeakers ($66,000/pair). I first encountered these loudspeakers at RMAF 2008's Kaiser/Echole exhibit extension in the nearby Hyatt, and have coveted them ever since. Optimally paired and internally wired then and now with Echole's excellent cabling, as well as with modded tube amps that had been re-wired with Echole, the sound of this system was so large, rich, and true that it blew me away. Stephen's summation&#151;"This system, more than any other I heard at RMAF, seemed to bring the musicians and instruments into the room with really impressive body and force"&#151;rings true.