Sonor Primary Line instruments were completely re-designed in 2010, for sound optimization, and environmental stewardship.  They are the first Orff instruments to be FSC certified.  This ensures eco-friendly production and sustainable harvesting of all wood used. 

The GBMP 1.1 deep bass metallophone has metal alloy sound bars measuring 35 x 10 mm.  They receive overtone tuning up to "a" and fundamental tuning from "b-flat".   The bars are narrower than those of the GBKM 10, and feature the note name and staff notation printed in the center of each bar.  The pitch range is c-a1 diatonic, with c1 being middle C.  All Sonor instruments include f-sharp and b-flat bars.  The resonator box is made of FSC birch plywood with a six resonance chambers.  It includes brackets for use with accessory legs or the Basis Trolley system.  The GBMP 1.1 comes with one pair of SCH 15 mallets, and coordinates with chromatic extension GBMP 2.1.

To replace pins, order part # ZS1
To replace tubing, order part # ALS1
To replace bars, order part # PR35X10