{"product_id":"heritage-audio-symph-eq-master-bus-stereo-asymptotic-equalizer","title":"Heritage Audio Symph Eq Master Bus Stereo Asymptotic Equalizer","description":"\u003cp\u003e70 YEARS AFTER ITS CREATION, THE BAXANDALL EQ GETS A DEFINITIVE UPDATE.\n\nBaxandall equalizer’s topology, introduced to the public by Peter Baxandall in 1952, was a very ingenious way of obtaining high and low shelves with boost and cut option without using expensive rotary switches. This affordable circuit was soon adopted by hi-fi and console manufacturers for its simplicity, where parametric options aren’t needed.\n\nHeritage Audio has successfully replaced the Baxandall topology with a functional equivalent — a much more musical one, implemented as a one rack space, master bus\/ mastering type unit.\n\nThe Stereo Asymptotic Equalizer, affectionately known as Symph EQ, takes its name from the shape obtained by its shelf curves; where the boost or cut amplitude grows up until the asymptotic value is reached, keeping the ultra highs and sub lows always controlled.\n\nIts sound can only be described as tight, sweet, and natural, and its use of parallel equalizing to obtain the desired response curves makes it to have exceptional low phase deviation and artifacts.\n\nSHELVING WITH SURGICAL, BUT MUSICAL PRECISION.\n\nA smart circuit layout allows for a maximum boost\/cut of 10.5 dB in 0.5 dB steps. The main rotary switch sets 1dB steps whilst the 0.5 button adds half a dB to the main reading. The CUT button turns the boost amount into cut. Six strategically selected frequency choices per band are available (8, 10, 12, 15, 20 and 24 Khz on the high shelf, and 470, 360, 220, 110, 60 and 20 Hz on the low shelf).\n\n2-POLE HIGH AND LOW PASS FILTERS\n\nIn order to keep the sub-low and ultra-high frequency content well under control, further high-pass and low-pass filters have been added on dual concentric rotary switches, at 12dB\/octave. 5 frequency choices plus OFF are available on each one (10, 12, 18, 22 and 30 Khz on the low-pass, and 160, 82, 47, 20 and 15 Hz on the high-pass).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCarnhill based, transformer coupled balanced inputs and outputs for added character and vintage vibe.\u003c\/li\u003e\n\u003cli\u003e73 style class A output stages bring the desired 73 sound to your mix or instrument buses.\u003c\/li\u003e\n\u003cli\u003eStepped controls for easy recall of settings.\u003c\/li\u003e\n\u003cli\u003eInput impedance: 10 Kiloohms bridging. Input is transformer balanced and floating.\u003c\/li\u003e\n\u003cli\u003eOutput impedance: Less than 75 Ohms, transformer balanced and floating, to drive a load of 600 ohms (factory terminated).\u003c\/li\u003e\n\u003cli\u003eMaximum output: Greater than +26dBu into 600 ohms.\u003c\/li\u003e\n\u003cli\u003eTHD: Less than 0.025% at 1 Khz, less than 0.05% at 100Hz.\u003c\/li\u003e\n\u003cli\u003eFrequency response: 20Hz ( +0.3dB ) to 20Khz (-0.2dB)\u003c\/li\u003e\n\u003cli\u003eNoise: Less than -89dBu , EQ flat.\u003c\/li\u003e\n\u003cli\u003eASYMPTOTIC EQUALIZER SECTION:\u003c\/li\u003e\n\u003cli\u003eHi Frequency shelving: Frequency selectable 8, 10, 12, 15, 20 and 24 Khz.\u003c\/li\u003e\n\u003cli\u003eBoost \/ Cut: 10.5 dB maximum, in steps of 0.5dB.\u003c\/li\u003e\n\u003cli\u003eLo Frequency shelving: Frequency selectable 470, 360, 220, 110, 60 and 20 Hz.\u003c\/li\u003e\n\u003cli\u003eBoost \/ Cut: 10.5 dB maximum, in steps of 0.5dB.\u003c\/li\u003e\n\u003cli\u003eFILTER SECTION:\u003c\/li\u003e\n\u003cli\u003e12dB\/octave high pass filter, -3dB point selectable at 160, 82, 47, 20 and 15 Hz.\u003c\/li\u003e\n\u003cli\u003e12dB\/octave low pass filter, -3dB point selectable at 10, 12, 18, 22 and 30 Khz.\u003c\/li\u003e\n\u003cli\u003eSide filter automatically turns into elliptical topology when M\/S is engaged, as in the disk cutters, at 6dB\/octave.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Heritage Audio","offers":[{"title":"Default Title","offer_id":48606296801433,"sku":"SYMPH-EQ","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0029\/6999\/3316\/files\/SYMPH-EQ.jpg?v=1785844909","url":"https:\/\/rectangletriangle.ca\/fr\/products\/heritage-audio-symph-eq-master-bus-stereo-asymptotic-equalizer","provider":"Rectangle Triangle","version":"1.0","type":"link"}