Big tube amplifiers were once scary monsters reserved for those who didn't mind heavy maintenance, careful tweaking, and the occasional explosion. Blown tubes required replacing, preferably with pricey matched pairs, then biasing with a voltmeter. Optimal sonic performance required regular bias monitoring and adjusting, and because of current surges on startup, you had to choose between leaving the heat-producing monoliths on, or turning them on and off for each listening session, thus shortening the life of the tubes.

Saturday, May 3, 1–5pm, Fidelis, located at 460 Amherst Street, Nashua, NH will host a seminar and open house with Peter McGrath of Wilson Audio (above) to celebrate and present Wilson Audio's new Sasha 2 loudspeaker. Brian Zolner of Bricasti Design will be on hand to talk about digital solutions and his highly regarded Bricasti M1 DAC, and Stereophile Senior Editor John Marks will be on hand to share his industry insights. Refreshments will be served. RSVP is appreciated: email store@fidelisav.com or call (603) 880-4434.

From whatever vantage point you choose, AXPONA (Audio Expo North America) 2014 in Chicago's Westin O'Hare was a major success. Attendance on opening day, Friday, April 25, was quite robust, and the feeling in the hallway and in rooms was extremely positive. Saturday was mobbed, with standees in many rooms during peak hours, and hallways buzzing.

Not one to think small, Brian Walsh of Essential Audio in Barrington, IL needed a very big room to house the Sound Lab Majestic 845 electrostatic loudspeakers ($35,840/pair), Atma-Sphere MP-1 Mk.III.2 preamplifier ($16,940) and MA-2 Mk III.2 output transformer-less amplifiers ($41,600/pair), Aurender W20 reference music server ($16,800), Bricasti M1 DAC ($8995), Kuzma Stabi XL 2-motor turntable with all the trimmings ($32,280 total), Teo Audio equipment racks, and cabling from Teo Audio, Clarity Cable, and Creative Cable Concepts.

Some of the best sound at AXPONA filled Chicago-based dealer/concert pianist George Vatchnadze's room. With more than a little help from industry veteran Dan Meinwald, who not only claimed to have simply plunked everything down, but also called the large room at the end of the 3rd floor of the Westin O'Hare "the best hotel showroom I've ever been in," Ella's "Angel Eyes" from her universally lauded LP, Let No Man Write My Epitaph, sounded drop-dead gorgeous. The midrange felt like a warm embrace, inviting me in without fear of witnessing Fitzgerald's emotion drowned in a sea of euphonia.

Is this the third consecutive show where the sound of Balanced Audio Technology (BAT) electronics has won me over? BAT doesn't need to either sugar-coat or tone down its tube sound, because its openness, clarity, and musical truth are so spot-on. IMHO, of course. The sound was so good that I didn't even bother to take notes on the music I heard.