{"product_id":"parasound-open-box-halo-a21-stereo-power-amplifier-silver-a-grade-1","title":"Parasound OPEN BOX Halo A21+ Stereo Power Amplifier - Silver - A Grade","description":"\u003cul\u003e\n\u003cli\u003e300 watts x 2 @ 8 Ω RMS, both channels driven\u003c\/li\u003e\n\u003cli\u003e500 watts x 2 @ 4 Ω RMS, both channels driven\u003c\/li\u003e\n\u003cli\u003e1000 watts x 1 @ 8 Ω, in bridged mode\u003c\/li\u003e\n\u003cli\u003eCircuitry designed by legendary John Curl\u003c\/li\u003e\n\u003cli\u003eHigh bias Class A\/AB operation\u003c\/li\u003e\n\u003cli\u003e60 amperes peak current per channel\u003c\/li\u003e\n\u003cli\u003eStable with speaker impedance dips to 1.5 Ω\u003c\/li\u003e\n\u003cli\u003eBalanced inputs with discrete circuits\u003c\/li\u003e\n\u003cli\u003eCHK Infinium, custom 5-way speaker binding posts\u003c\/li\u003e\n\u003cli\u003eGold-plated RCA input \u0026amp; loop output jacks\u003c\/li\u003e\n\u003cli\u003eDirect-coupled signal path, no capacitors or inductors\u003c\/li\u003e\n\u003cli\u003eDC Servo and relay protection circuits\u003c\/li\u003e\n\u003cli\u003eAC turn-on inrush surge protection with relay bypass\u003c\/li\u003e\n\u003cli\u003eJFET input stage, MOSFET driver stage\u003c\/li\u003e\n\u003cli\u003e16 beta-matched 15 ampere, 60 MHz bipolar output transistors\u003c\/li\u003e\n\u003cli\u003e1.3 kVA shielded toroid transformer w\/ independent windings for each channel\u003c\/li\u003e\n\u003cli\u003eIndependent power supplies for input stage, driver stage, and output stage\u003c\/li\u003e\n\u003cli\u003e108,000 µF filter capacitors for output stages\u003c\/li\u003e\n\u003cli\u003eFull power is rated all the way down to 5Hz for unrestricted low-end bass\u003c\/li\u003e\n\u003cli\u003eHarris hyper-fast soft-recovery bridge diode rectifiers\u003c\/li\u003e\n\u003cli\u003eAutomatic turn-on by 12 V trigger or audio sensing\u003c\/li\u003e\n\u003cli\u003e4 rack space chassis with rear carry handles\u003c\/li\u003e\n\u003cli\u003eRack mount hardware is included\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Parasound","offers":[{"title":"Default Title","offer_id":42610244157524,"sku":"PARASOUND:A21P-SLV-BSA","price":2699.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0572\/3281\/8260\/files\/REVIEW_2336.jpg?v=1769708155","url":"https:\/\/www.audioadvice.com\/products\/parasound-open-box-halo-a21-stereo-power-amplifier-silver-a-grade-1","provider":"Audio Advice","version":"1.0","type":"link"}