The Low Quartet (1985) 9'

bcl, bsx, tbn, db (or any four low instruments)
version also available for 4 bass clarinets
First Performer: 

Michael Gordon Philharmonic, Roulette, New York City, 8 May 1985

also available for 4 bass clarinets.

recordings:

Volker Hemken
iTunes
2002
Brian Sacawa
Innova Records
2007

browse related works:

Instruments:  Bass Clarinet   Saxophone   Trombone   Double Bass