George Cardas had had a celebratory coin minted to celebrate his company's first quarter century: "25 years helping musicians reproduce their music" it states on the front. Amen to that sentiment, George.

On the other side of the coin is a tribute to George's friend and mentor, retailer Brooks Berdan, who passed away last summer.

When Michael Fremer reviewed the 710 amplifier from Swiss manufacturer Soulution last August, his praise for the sound was surpassed by mine for the measured performance. "The Soulution 710 is definitely one of the best-measuring amplifiers I have encountered, " I wrote, "Color me impressed."

Denver retailer Apex Audio, which is continuing in the tradition of the late John Barnes' Audio Unlimited store, was using the Soulution 700 monoblocks ($130,000/pair), which each offer 430W into ohms, 860W into 4 ohms, were being use to drive Focal's Stella Utopia EM speakers ($90,000/pair), with their electromagnet-powered woofers via Tara Labs cables.

Colorado Springs retailer Audio Limits was filling one of the very large ground-floor rooms at RMAF with sound, courtesy of the massive Venture Grand Ultimate loudspeakers ($90,000/pair) driven by the new AMP M1 solid-state monoblock amplifiers from BMC ($7790 each, $15,580 pair). Source was the BMC BDCD1 belt-drive CD transport ($5990), the BMC DAC1 Pre (HR) D/A converter/preamplifier ($6290), with Silversmith The Silver interconnects and speaker cables, Stage III power cables, and Weizhi PRS-6 power distributor.

I listened to a track I haven't heard in years in this room, Michel Jonasz's "Les temps passeé," from the CD La fabuleuse histoire de mister swing (1987), and was blown away by the enormous sound, the huge dome of ambience that was defined between and behind the speakers, and the sheer effortlessness with which the music was presented.

I was intimately familiar with the Sonus Faber Guarneri Evolution speakers $20,000/pair), with their matching stands ($2000/pair), in one of Listen-Up's rooms at RMAF, having measured them two days before I left for Denver. (Art Dudley is reviewing this little jewel of a speaker in the January 2012 issue of Stereophile). At RMAF, they were being bi-amped with four PrimaLuna DiaLogue 7 tubed monoblocks ($5499/pair) with AudioQuest cable, Preamp was the PrimaLuna DiaLogue 3 ($2699) and while a PrimaLuna ProLogue Classic CD player ($2999) could be seen. this had been broken in shipping and CDs were being played on a Simaudio player.

From my listening notes, as I auditioned the classic Chet Atkins-Mark Knopfler gittar-pickin' duet "There'll be Some Changes Made": "maybe a little too rich-balanced but a good sense of pace and impressive low-frequency extension for such a small speaker...unaccompanied female voice had a beautifully liquid quality with space space space!"

Simaudio's Lionel Goodfield was his usual effective DJ self in the room in Colorado retailer Listen-Up was demming the Canadian company's gear. Digital front-end was the Moon Evolution 650D CD player/DAC ($8000) that Mikey Fremer raves about in the November 2011 issue of Stereophile; analog front-end was the ProJect Xperience Classic turntable feeding a Moon 310LP phono preamp; the Moon Evolution 700i integrated amplifier ($12,000) that Fred Kaplan enthusiastically reviewed for Stereophile last March, was driving Sonus Faber Cremona M floorstanding speakers ($10,000/pair). Cables were all Shunyata Black Mamba and power was sourced from a Shunyata Hydra.

Industry veteran Colleen Cardas—and yes, Colleen, I meant the word "veteran" as a compliment—has set up, with vinyl blogger Marc Phillips, a new company Colleen Cardas Imports, to distribute Unison Research amplifiers and Opera loudspeakers in the US. However, the room at RMAF CCI was sharing with Positive Feedback Online was featuring the Sonicweld Pulse Rod active speakers ($125,000/pair including DEQX DSP equalizer). Analog front-end was the Funk Firm Sapphire turntable $5000) fitted with the Funk Firm FXR-II tonearm and a Transfiguration cartridge and feeding a Unison Research Unico Nuovo integrated amplifier ($2795) used as a phono stage. Digital front-end was a laptop running Amarra feeding USB data to the new Sonicweld Divertor ($2888) which fed 24/192 S/PDIF data to the DEQX.

Dan Meinwald of E.A.R. USA explained to me that his goal for RMAF was to put together a system where the individual components each cost $6000 or less. The new Marten FormFloor loudspeakers ($6500/pair) just exceed that limit, but are compensated for by the impressive new 192 DACute D/A processor from E.A.R. ($5700 in black but $6500 in chrome). The DAC was being fed audio data by the latest Diamond version of Neal van der Berg's Music Vault ($4449), which incorporates a Blu-ray drive for ripping discs, a 2TB drive for audio data, a solid-state drive for the operating system, and a Lynx aes16 audio output card.

The analog front end in the E.A.R. USA room was the Townshend Rock 7 turntable ($3200), with its unique system for applying damping where it is most needed, at the cartridge end of the arm rather than the pivot, fitted with the Helios Omega arm ($2800) and a Dynavector XV1S cartridge. Phono preamp was the E.A.R. 324 that both Art Dudley and Mikey Fremer have enthused over in the pages of Stereophile.

Taking an imaginative approach to the design of their room, rack manufacturer Dynamic Contrasts was holding the impressive BMC C1 integrated amplifier and the Esoteric UX-3SE CD player in a tight embrace with its RTS system. With Legacy Focus SE speakers, the sound in this room featured impressive dynamics and extension at both ends of the spectrum, but the sound was so loud, not only with David Essex's driving "Rock On" but also with 10cc's gentle "I'm Not In Love," that I couldn't stay. Perhaps I am just getting old.

Zesto Audio was a name new to me, but their versatile Andros PS1 tubed MM/MC phono stage ($3900) was getting great sound from Billie Holiday's "Day In, Day Out," played on a Thorens TD309 player ($1900) fitted with a Dynavector DV-20X2L cartridge ($850). The rest of the system comprised a ModWright LS 100 tube preamp ($3495) and ModWright KWA 150 solid-state amplifier driving Fritz Carbon 7, Rev.5 speakers ($1795–$1950/pair), wired with WyWires.