One of my favorite jazz bands, Ben Allison’s Medicine Wheel, is playing at the Jazz Standard Nov. 4. Allison is an enticing bassist and composer, agile and inventive, flitting from Herbie Nichols to film noir to raga, ska, funky blues, and straight-ahead jazz without showing a seam, loosening his wit, or abandoning the melody or the swing. The band is first-rate (regular readers will recognize most of them): Frank Kimbrough, piano; Jenny Scheinman, violin; Ted Nash and Michael Blake, reeds; and Michael Sarin, drums.

Based in the Czech Republic, KR Enterprise is headed by an occasionally gruff Dr. Riccardo Kron and his American-born wife, Eunice, who operate the company out of a partially abandoned factory that was once part of the state-owned Tesla High Vacuum Technology facility in Prague. The Swiss-funded company is unique in that it manufactures both amplifiers <I>and</I> the tubes that power them. KR's tubes have found favor with other amplifier makers as well&#151;especially the 300BXS, electrically identical to a <A HREF="http://www.stereophile.com/features/229">standard 300B</A> but rated at 25W in class-A.

Based in the Czech Republic, KR Enterprise is headed by an occasionally gruff Dr. Riccardo Kron and his American-born wife, Eunice, who operate the company out of a partially abandoned factory that was once part of the state-owned Tesla High Vacuum Technology facility in Prague. The Swiss-funded company is unique in that it manufactures both amplifiers <I>and</I> the tubes that power them. KR's tubes have found favor with other amplifier makers as well&#151;especially the 300BXS, electrically identical to a <A HREF="http://www.stereophile.com/features/229">standard 300B</A> but rated at 25W in class-A.

Based in the Czech Republic, KR Enterprise is headed by an occasionally gruff Dr. Riccardo Kron and his American-born wife, Eunice, who operate the company out of a partially abandoned factory that was once part of the state-owned Tesla High Vacuum Technology facility in Prague. The Swiss-funded company is unique in that it manufactures both amplifiers <I>and</I> the tubes that power them. KR's tubes have found favor with other amplifier makers as well&#151;especially the 300BXS, electrically identical to a <A HREF="http://www.stereophile.com/features/229">standard 300B</A> but rated at 25W in class-A.

Based in the Czech Republic, KR Enterprise is headed by an occasionally gruff Dr. Riccardo Kron and his American-born wife, Eunice, who operate the company out of a partially abandoned factory that was once part of the state-owned Tesla High Vacuum Technology facility in Prague. The Swiss-funded company is unique in that it manufactures both amplifiers <I>and</I> the tubes that power them. KR's tubes have found favor with other amplifier makers as well&#151;especially the 300BXS, electrically identical to a <A HREF="http://www.stereophile.com/features/229">standard 300B</A> but rated at 25W in class-A.

Based in the Czech Republic, KR Enterprise is headed by an occasionally gruff Dr. Riccardo Kron and his American-born wife, Eunice, who operate the company out of a partially abandoned factory that was once part of the state-owned Tesla High Vacuum Technology facility in Prague. The Swiss-funded company is unique in that it manufactures both amplifiers <I>and</I> the tubes that power them. KR's tubes have found favor with other amplifier makers as well&#151;especially the 300BXS, electrically identical to a <A HREF="http://www.stereophile.com/features/229">standard 300B</A> but rated at 25W in class-A.

Based in the Czech Republic, KR Enterprise is headed by an occasionally gruff Dr. Riccardo Kron and his American-born wife, Eunice, who operate the company out of a partially abandoned factory that was once part of the state-owned Tesla High Vacuum Technology facility in Prague. The Swiss-funded company is unique in that it manufactures both amplifiers <I>and</I> the tubes that power them. KR's tubes have found favor with other amplifier makers as well&#151;especially the 300BXS, electrically identical to a <A HREF="http://www.stereophile.com/features/229">standard 300B</A> but rated at 25W in class-A.

Based in the Czech Republic, KR Enterprise is headed by an occasionally gruff Dr. Riccardo Kron and his American-born wife, Eunice, who operate the company out of a partially abandoned factory that was once part of the state-owned Tesla High Vacuum Technology facility in Prague. The Swiss-funded company is unique in that it manufactures both amplifiers <I>and</I> the tubes that power them. KR's tubes have found favor with other amplifier makers as well&#151;especially the 300BXS, electrically identical to a <A HREF="http://www.stereophile.com/features/229">standard 300B</A> but rated at 25W in class-A.

Based in the Czech Republic, KR Enterprise is headed by an occasionally gruff Dr. Riccardo Kron and his American-born wife, Eunice, who operate the company out of a partially abandoned factory that was once part of the state-owned Tesla High Vacuum Technology facility in Prague. The Swiss-funded company is unique in that it manufactures both amplifiers <I>and</I> the tubes that power them. KR's tubes have found favor with other amplifier makers as well&#151;especially the 300BXS, electrically identical to a <A HREF="http://www.stereophile.com/features/229">standard 300B</A> but rated at 25W in class-A.

Based in the Czech Republic, KR Enterprise is headed by an occasionally gruff Dr. Riccardo Kron and his American-born wife, Eunice, who operate the company out of a partially abandoned factory that was once part of the state-owned Tesla High Vacuum Technology facility in Prague. The Swiss-funded company is unique in that it manufactures both amplifiers <I>and</I> the tubes that power them. KR's tubes have found favor with other amplifier makers as well&#151;especially the 300BXS, electrically identical to a <A HREF="http://www.stereophile.com/features/229">standard 300B</A> but rated at 25W in class-A.