{"product_id":"parasound-halo-a52-plus-power-amplifier","title":"Parasound HALO A52 Plus Power Amplifier","description":"HALO A 52+ Five Channel Power Amplifier \u003cbr\u003e\u003cbr\u003e\n\nA 52+\u003cbr\u003e\n\u003cbr\u003e\n\n\n•180 watts RMS x 5 @ 8 Ω\u003cbr\u003e\n•255 watts RMS x 5 @ 4 Ω\u003cbr\u003e\n•225 watts RMS x 2 @ 8 Ω\u003cbr\u003e\n•350 watts RMS x 2 @ 4 Ω\u003cbr\u003e\n•Class A\/AB circuitry designed by legendary John Curl\u003cbr\u003e\n•Direct coupled - no capacitors or inductors in audio path ensures the cleanest signal\u003cbr\u003e\n•Balanced XLR inputs with discrete circuits\u003cbr\u003e\n•Full power is rated all the way down to 5Hz for unrestricted low-end bass\u003cbr\u003e\n•Custom 1.5 kVA encapsulated toroid power transformer with independent secondary windings for each channel\u003cbr\u003e\n•Hand-matched JFETs for input stage\u003cbr\u003e\n•Hand-matched MOSFETs for driver stage\u003cbr\u003e\n•Beta-matched 15 amp, 60 MHz bipolar output transistors (3 pairs per channel)\u003cbr\u003e\n•100,000 µF power supply filter capacitance \u003cbr\u003e\n•DC Servo and relay protection circuits\u003cbr\u003e\n•Auto turn on by audio signal or 12V trigger\u003cbr\u003e\n•Heavy-duty 24k gold-plated, 5-way speaker terminals\u003cbr\u003e\n•3U chassis with updated cosmetics, rack mountable with HRA3 (sold separately) \u003cbr\u003e\n\u003cbr\u003e\n\n\nTechnical Specifications:-\u003cbr\u003e\n\u003cbr\u003e\n\nPower Output - All 5 Channels Driven:\u003cbr\u003e\n180 watts x 5, 8 Ω\u003cbr\u003e\n255 watts x 5, 4 Ω\u003cbr\u003e\n\u003cbr\u003e\n\n \nPower Output - 2 Channels Driven:\u003cbr\u003e\n225 watts x 2, 8 Ω \u003cbr\u003e\n350 watts x 2, 4 Ω\u003cbr\u003e\n\u003cbr\u003e\n\nPower measurements parameters with 120VAC:\u003cbr\u003e\n0.05% THD, RMS continuous power, \nfull audio band (20 Hz - 20 kHz)\u003cbr\u003e\u003cbr\u003e\n \nCurrent Capacity:\u003cbr\u003e\n45 amperes peak, per channel\u003cbr\u003e\n\u003cbr\u003e\n \nDynamic Headroom:\u003cbr\u003e\n  \u0026gt;1.5dB\u003cbr\u003e\u003cbr\u003e\n \nSlew Rate:\u003cbr\u003e\n \u0026gt; 130 volts per microsecond\u003cbr\u003e\u003cbr\u003e\n \nFrequency Response:\u003cbr\u003e\n5 Hz - 100 kHz, +0\/-3 dB \u003cbr\u003e\u003cbr\u003e\n \nTotal Harmonic Distortion (THD):\u003cbr\u003e\n \u0026lt; 0.05 % at full power\u003cbr\u003e\n  \u0026lt; 0.03 % at typical listening levels\u003cbr\u003e\u003cbr\u003e\n\n \nIM Distortion:\u003cbr\u003e\n \u0026lt; 0.04 %\u003cbr\u003e\u003cbr\u003e\n \nTIM: Unmeasurable\u003cbr\u003e\u003cbr\u003e\n \nInterchannel Crosstalk:\u003cbr\u003e\n \u0026gt; 78 dB at 1 kHz\u003cbr\u003e\n \u0026gt; 63 dB at 20 kHz\u003cbr\u003e\u003cbr\u003e\n \nInput Impedance:\u003cbr\u003e\nUnbalanced: 47 kΩ \u003cbr\u003e\nBalanced: 94 kΩ, 47 kΩ per leg\u003cbr\u003e\u003cbr\u003e\n \nInput Sensitivity for 28.28 V Output into 8 Ω:\u003cbr\u003e\nUnbalanced: 1 V \u003cbr\u003e\nBalanced: 1 V per leg\u003cbr\u003e\nTotal Gain: 29 dB\u003cbr\u003e\u003cbr\u003e\n \nS\/N Ratio:\u003cbr\u003e\n \u0026gt; 112 dB, input shorted, IHF A-weighted\u003cbr\u003e\n \u0026gt; 102 dB, input shorted, unweighted\u003cbr\u003e\u003cbr\u003e\n \nDamping Factor:\u003cbr\u003e\n \u0026gt; 1100 at 20 Hz\u003cbr\u003e\u003cbr\u003e\n \nDC Trigger Requirements:\u003cbr\u003e\n+9 Vdc to +12 Vdc, 5 mA\u003cbr\u003e\u003cbr\u003e\n \nAudio Trigger Requirements:\u003cbr\u003e\n2 mV - 10 mV\u003cbr\u003e\u003cbr\u003e\n \nXLR Pin Identification:\u003cbr\u003e \n1 = Ground (Shield) \u003cbr\u003e\n2 = Positive\u003cbr\u003e\n3 = Negative (Return)\u003cbr\u003e\u003cbr\u003e\n \nDimensions:\u003cbr\u003e\nWidth: 17-1\/4\" (437 mm)\u003cbr\u003e\nHeight without feet: 5-1\/4\" (133 mm)\u003cbr\u003e\nHeight with feet: 5-7\/8\" (149 mm)\u003cbr\u003e\nDepth: 20\" (508 mm)\u003cbr\u003e\nDepth with cables: 21-1\/4\" (540 mm)\u003cbr\u003e\u003cbr\u003e\n \nNet Weight: \n55 lb. (25 kg)\u003cbr\u003e\u003cbr\u003e\n \nShipping Weight: \n69 lb. (31.3 kg)\u003cbr\u003e\u003cbr\u003e\n \nPower Requirement:\u003cbr\u003e\nStandby: 1 Watt \u003cbr\u003e\nIdle: 125 Watts \u003cbr\u003e\nMaximum: 1500 Watts\n","brand":"Parasound","offers":[{"title":"Black","offer_id":57414562218316,"sku":"PARAHALOA52PLUSBLACK","price":3416.63,"currency_code":"GBP","in_stock":true},{"title":"Silver","offer_id":57423597568332,"sku":"PARAHALOA52+-S","price":3416.63,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Parasound-Halo-A52-plus-Black.jpg?v=1777549456","url":"https:\/\/www.stoneaudio.co.uk\/products\/parasound-halo-a52-plus-power-amplifier","provider":"Stone Audio","version":"1.0","type":"link"}