Microphone system for piano accordions

Internal Accordion Microphone System - with volume control and mono out. 6 high quality condenser microphones for treble side. 2 microphones for bass side. Treble microphone board lenght is 340 mm. Bass microphone board lenght is 120 mm. Cable A : from right side to the inside of bellows. Cable C : from inside of the bellows to the bass side. Natural sound and no feedback problems!