Thursday, September 8, Liquid HiFi (11915 Royal Castle Court, Charlotte, NC 28277) will be demonstrating products at the Providence Country Club (6001 Providence Country Club Drive, Charlotte, NC 28277) from KEF, Nordost and Simaudio. Attendees will be treated to demonstrations featuring the new KEF Reference Three speakers, Simaudio Moon Evolution electronics, and Nordost cabling. In addition to scheduled demonstrations, guests will also enjoy giveaway items, hors d'oeuvres, beverages and will be entered into a raffle drawing to win a KEF Muo Bluetooth speaker and $500 worth of Nordost products.

It's shocking to go from the sound of soprano Anna Netrebko's voice on her first DG recital of Opera Arias to that on her latest disc, Verismo. The earlier disc, recorded in March, 2003 when Netrebko was 32, showcases a true, shining lyric soprano whose vocal production is absolutely smooth. Over 12 years later, when Netrebko recorded Verismo between July 2015 and June 2016, her weightier low range lacks shine, and her stronger and sometimes wider vibrato occasionally shows signs of a beat.

In January, I reviewed JL Audio's Fathom f113v2 subwoofer (footnote 1), which features, among other improvements over the original Fathom f113, a better multiband equalizer. The significance of this relates to the great influence exerted by room dimensions and acoustics on a loudspeaker's performance.

The matter of room acoustics itself relates to the Schroeder frequency: a transition point, usually between 200 and 300Hz above which a room will exhibit a high density of reflections that are analyzed statistically, and below which that room will display a limited number of discrete modal reflections. (Thus, it should not to be confused with the number of times that Beethoven's music appears in Charles Schulz's comic strip "Peanuts.")

There were no surprises, innovations, or breakthrough designs in loudspeakers at the 1985 Summer Consumer Electronics Show in Chicago. By and large, those on display were nothing more than refinements of, or variations on, previous speaker designs. Of course, there's nothing the matter with that; any improvement in a product is a step in the right direction. It merely perpetuates the pattern of the past ten years: evolution but no revolution.