{"product_id":"igs-audio-ne573","title":"IGS Audio NE573","description":"\u003cdiv lang=\"en\"\u003e\n\u003cstrong\u003eIGS Audio NE573\u003c\/strong\u003e\n\n\u003cp\u003eThe NE573 is a single-channel Class A microphone preamplifier in API 500 format, built by IGS Audio as a faithful circuit recreation of the Neve 1073 first revision. The design focus is on the authenticity of the internal circuit rather than the appearance – which separates the NE573 from cosmetic clones: a Motorola transistor on the output stage, Grayhill switches, IGS Custom transformers (Carnhill in some versions) on input and output, and operation at 24 V rather than the standard 16 V of the 500-series power rail. That last point is critical – the original Neve 1073 ran on higher supply voltage, which directly affects the transistor operating point, headroom, and saturation character at higher input levels. Three-year manufacturer warranty.\u003c\/p\u003e\n\n\u003ch3\u003e24 V instead of 16 V – why supply voltage matters here\u003c\/h3\u003e\n\u003cp\u003eStandard 500-series modules run on ±16 V rails. The NE573 operates at 24 V – requiring a 500-series rack that supports higher voltage or an onboard voltage conversion stage. This is not a marketing decision: higher supply voltage directly shifts the Motorola output transistor's operating point closer to the conditions under which the original 1073 worked. At 16 V, the same circuit behaves differently – lower dynamic headroom before saturation, different harmonic distortion characteristics when the input is driven hard. The choice of 24 V is a design decision in service of tonal authenticity, not installation convenience. Switchable input impedance at 300\/1200 Ω (via Grayhill switch) changes the loading behaviour on the microphone: 300 Ω gives a more aggressive, closer-to-original 1073 character; 1200 Ω offers more headroom and a gentler tonal interaction with the source.\u003c\/p\u003e\n\n\u003ch3\u003eFront-panel combo jack and stepped gain\u003c\/h3\u003e\n\u003cp\u003eA combo XLR\/TS jack on the front panel handles both microphones and Hi-Z instruments without rerouting cables to the rear XLR when switching between a mic and a direct guitar or bass. The stepped Gain control provides session recall across its range of up to approximately 70 dB, with a separate Output trimmer for fine level adjustment after the gain stage. Phantom power +48V and a phase reverse switch complete the controls. The combination of switchable impedance, front-panel Hi-Z, and full gain range means the NE573 handles virtually any source type in a tracking session without reorganising the signal chain between takes.\u003c\/p\u003e\n\n\u003ch3\u003eKEY FEATURES\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eClass A Mic\/Hi-Z preamplifier, API 500 format, mono (Neve 1073-style)\u003c\/li\u003e\n\u003cli\u003eMotorola transistor on the output stage – as in the original Neve 1073 Rev 1\u003c\/li\u003e\n\u003cli\u003eIGS Custom \/ Carnhill transformers on input and output\u003c\/li\u003e\n\u003cli\u003eGrayhill switches throughout\u003c\/li\u003e\n\u003cli\u003eOperates at 24 V instead of standard 16 V\u003c\/li\u003e\n\u003cli\u003eSwitchable input impedance: 300 \/ 1200 Ω\u003c\/li\u003e\n\u003cli\u003eFront-panel combo XLR\/TS jack (Mic + Hi-Z)\u003c\/li\u003e\n\u003cli\u003eStepped Gain (up to ~70 dB) + Output trimmer\u003c\/li\u003e\n\u003cli\u003ePhantom power +48V\u003c\/li\u003e\n\u003cli\u003ePhase reverse switch\u003c\/li\u003e\n\u003cli\u003e3-year manufacturer warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTECHNICAL SPECIFICATIONS\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: transformer mic\/Hi-Z preamplifier, Class A, API 500, mono\u003c\/li\u003e\n\u003cli\u003eTopology: Neve 1073 Rev 1-style\u003c\/li\u003e\n\u003cli\u003eOutput transistor: Motorola (original type)\u003c\/li\u003e\n\u003cli\u003eTransformers: IGS Custom \/ Carnhill (input and output)\u003c\/li\u003e\n\u003cli\u003eSwitches: Grayhill\u003c\/li\u003e\n\u003cli\u003eSupply voltage: 24 V (above standard API 500 ±16 V)\u003c\/li\u003e\n\u003cli\u003eInput impedance (balanced): 300 \/ 1200 Ω (switchable)\u003c\/li\u003e\n\u003cli\u003eGain: up to ~70 dB (stepped) + Output trimmer\u003c\/li\u003e\n\u003cli\u003eInputs: XLR (rear) + combo XLR\/TS jack (front, Hi-Z)\u003c\/li\u003e\n\u003cli\u003ePhantom power: +48V (switchable)\u003c\/li\u003e\n\u003cli\u003ePhase reverse: yes\u003c\/li\u003e\n\u003cli\u003eFormat: API 500, single slot\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"IGS Audio","offers":[{"title":"Default Title","offer_id":54001635295569,"sku":"47379","price":752.37,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8741\/0769\/files\/IGSAudioNE5731.jpg?v=1781176168","url":"https:\/\/wrdtunes.com\/fr\/products\/igs-audio-ne573","provider":"Wired Tunes","version":"1.0","type":"link"}