PIONEER SA-8500 integrated amplifier MAIN SWITCHING CIRCUIT BOARD ASSEMBLY as pictured, it pulled, untested (working condition is unknown) what you see is what you'll receive, note: The shown PIONEER SA-8500 amplifier picture is using as reference only, this item is intending for professional (whom who know it well) and it is final (NO RETURN or REFUND) please buy or bib accordingly. Thanks for looking.