Focusrite Red 1 - 4 channel Microphone Preamp
Tested and working perfectly! Studio use only!
Slight scratches not on face from removing from rack. A small slight fade in color on the left near number one. See pics.

The Focusrite Red 1 is a legendary, high-end microphone preamplifier renowned for its ultra-clear, transparent sound and robust build quality. Originally designed with circuit topology based on Rupert Neve's classic ISA designs for AIR Studios, it delivers an exceptionally low noise floor and pristine audio fidelity

Key Specifications & Features

• Gain Range: Provides up to 66dB of gain, making it powerful enough to drive demanding ribbon, dynamic, and condenser microphones.
• Stepped Gain Control: Uses premium Grayhill gold-plated military-grade switches that adjust in precise 6dB increments for flawless stereo matching and recall.
• Premium Transformers: Built with custom-wound Lundahl LL158 input transformers and Carnhill output transformers to preserve the iconic vintage response.
• Channel Controls: Each channel features an illuminated analog VU meter, 48V phantom power, polarity/phase reverse, and a classic scribble disc.
• Massive Bandwidth: An extra-wide frequency response ranging from 10Hz to 140kHz ensures absolute signal accuracy.

Sonic Character & Best UsesReviewers from Sound On Sound and Ask.Video highlight that the Red 1 is fundamentally a neutral and transparent preamp.
It yields a very revealing, smooth, and detailed sound with a subtle hint of lower-mid warmth, but it will not heavily color or overdrive your signal when pushed. It performs exceptionally well for:

• Lead Vocals: Adds a "sweet," clear quality that helps vocals sit perfectly at the front of a mix.
• Acoustic Instruments: Ideal for capturing the fast transients and natural dynamics of pianos and string instruments.
• Drums: Highly favored by studio engineers as a premium snare drum preamp

• Rear Inputs: 4 x Female XLR ports (dedicated microphone inputs).
• Rear Outputs: 4 x Male XLR ports (balanced line-level outputs).
• Power Connection: Standard IEC power cable socket.

Technical Specifications:
The core audio specifications for the Focusrite Red 1 hardware are as follows:
Parameter Specification Details:

Gain Range -6dB to +60dB Adjusted in precise 6dB steps via gold-plated rotary switches.
Input Impedance 1,200 Ω (Nominal) Balanced and floating, optimized for studio microphones.
Frequency Response10Hz to 140kHz Ultra-wide bandwidth (-3dB points).
Maximum Input Level> +28dBu Massive headroom; virtually impossible to clip with a hot mic.
Maximum Output Level+25.5dBu Can easily drive incredibly long cable runs without loss.
Equivalent Input Noise (EIN)-127dBu / -128dBu Exceptionally low noise floor at 60dB gain (A-weighted).
Total Harmonic Distortion (THD+N) 0.0039% Measured at 1kHz; pristine, ultra-clean harmonic profile.
Internal Gain Structure Shared Architecture 14dB from input transformer, 6dB from output transformer, 40dB from the active amp.

• 48V Phantom Power Switch: Boxed red illuminated button.
• Phase/Polarity Invert: Yellow illuminated button.