{"product_id":"interphase-audio-helium-500","title":"Interphase Audio Helium 500 Series Equalizer","description":"\u003cp\u003eThe \u003cstrong\u003eInterphase Audio Helium\u003c\/strong\u003e combines capacitor based EQ circuits and filters with inductor based EQ circuits in. single slot 500 Series module. Helium is essentially a combination of Interphase's Carbon and Iridium EQs, with extra filter circuits added. It features a fully Class A, discrete design with all components having been carefully chosen and matched to provide an extremely musical sound.\u003c\/p\u003e\r\n\u003cp\u003eHelium's four bands have large overlapping frequency controls, making it well-suited for minimizing problematic frequencies, or giving an extra boost to others. The HF and LF band can be used as either bell-curved EQ or as -12 dB per octave hi—cut\/lo-cut filter. The two middle bands feature inductive EQ, with custom-wound Carnhill inductors on the lo-mid band. Each band can be cut or boost with as much as 15 dB per band.\u003c\/p\u003e\r\n\u003cp\u003eThis is definitely not a clone or copy. Like all Interphase Audio products, Helium is unique and features great sound and straight forward functionality!\u003c\/p\u003e\r\n\u003ch3 id=\"toc_0\"\u003eTECHNICAL DETAILS:\u003c\/h3\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eInput impedance: 30 kOhms\u003c\/li\u003e\r\n\u003cli\u003eCommon mode rejection: 80 dB\u003c\/li\u003e\r\n\u003cli\u003eDistortion: 0.001% (+4 dBu output 1 kHz)\u003c\/li\u003e\r\n\u003cli\u003eFrequency response: 7 Hz to 70 kHz (-3 dB)\u003c\/li\u003e\r\n\u003cli\u003eBoost\/Cut range: ±15 dB (continuously variable)\u003c\/li\u003e\r\n\u003cli\u003eHF Frequency: 1.2 kHz - 22 kHz (continuously variable)\u003c\/li\u003e\r\n\u003cli\u003eHF Frequency switchable to 12 dB per octave sweepable Hi-Cut filter 1.2 kHz - 22 kHz\u003c\/li\u003e\r\n\u003cli\u003eHMF Frequency: 1.5, 3, 5 6, 7, 8 kHz (stepped)\u003c\/li\u003e\r\n\u003cli\u003eLMF Frequency: 125, 250, 500, 1k, 2k, 4 kHz (stepped)\u003c\/li\u003e\r\n\u003cli\u003eLF Frequency: 25 Hz - 440 Hz (continuously variable)\u003c\/li\u003e\r\n\u003cli\u003eLF Frequency switchable to 12 dB per octave sweepable Lo-Cut filter 25 Hz - 440 Hz\u003c\/li\u003e\r\n\u003cli\u003eFilter Q: 1.2 (just over 1 octave)\u003c\/li\u003e\r\n\u003cli\u003eMaximum input level: +2 8dBu\u003c\/li\u003e\r\n\u003cli\u003eMaximum output level: +28 dBu (10 kOhms load)\u003c\/li\u003e\r\n\u003cli\u003eNominal input and output level: +4 dBu (electronically balanced)\u003c\/li\u003e\r\n\u003cli\u003eOutput impedance: 100 Ohms\u003c\/li\u003e\r\n\u003cli\u003eNoise floor (typical, unweighted, EQ on): -80 dBu\u003c\/li\u003e\r\n\u003cli\u003eNoise floor (unweighted, EQ off): -100 dBu\u003c\/li\u003e\r\n\u003cli\u003eCurrent requirement: 129 mA (maximum) per rail\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"Interphase Audio","offers":[{"title":"Default Title","offer_id":44450908733543,"sku":"187532","price":770.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/interphase-helium_187532_1.jpg?v=1787095050","url":"https:\/\/vintageking.mom\/products\/interphase-audio-helium-500","provider":"Vintage King","version":"1.0","type":"link"}