The passac EC-1 is a filter system that simulates the soundhole resonance of an acoustic instrument. Soundhole resonance is the body of an acoustic instrument, resonating with air and directing sound outward via the soundhole No box instructions or accessories. Unit only Tested in good working order, good used condition, see photos of the exact item you’ll receive UK ONLY PLEASE or eBay global shipping programme CHECK OUR OTHER CLEARANCE ITEMS PLEASE VIEW FEEDBACK AND BUY WITH CONFIDENCE 1 TRUSTED EBAY SELLER FAST & FREE ROYAL MAIL TRACKED DELIVERY SERVICE
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