SPL Gemini All Black – Mastering M/S Processor with 120V Technology

The SPL Gemini All Black is the first mid/side (M/S) processor designed with 120V technology, offering precise control over stereo imaging and mix elements. Whether used for stereo enhancement, mid/side EQ or compression, or elliptical filtering, Gemini gives mastering engineers unprecedented flexibility and sonic precision.

Key Features

• 120V Technology: Unmatched dynamic range and audio transparency.
• Mid/Side Processing: Isolate and control mid (center) and side (stereo) signals separately.
• Stereo Image Control: Adjust stereo width and enhance spatial depth.
• Elliptical Filter: Shift low-frequency content from the side to the mid for better punch.
• Dedicated Inserts: Integrate external processors for advanced M/S processing.
• Neutrik XLR Connectors: Fully balanced inputs, outputs, and inserts for pristine signal integrity.
• Hermes Integration: Seamlessly integrates with the SPL Hermes Mastering Router.

What is Mid/Side Processing?

Mid/Side (M/S) processing allows for independent control of the central and stereo elements of a mix:

• Mid Signal (L+R): Includes vocals, snare, bass, and central instruments.
• Side Signal (L-R): Contains guitars, pads, cymbals, and stereo effects.

By processing the mid and side signals separately, you can enhance clarity, adjust balance, and fine-tune stereo width.

Mid Signal Controls

• Balance: Adjust the exact center position for better mix alignment.
• Trim: Fine-tune the mid-level for precise dynamic control.
• Solo: Listen exclusively to the mid signal for critical adjustments.
• Insert: Activate external processors for mid-only processing.

Side Signal Controls

• Stereo Width: Increase or decrease the stereo spread.
• Elliptical Filter: Shift bass frequencies from side to mid for improved low-end focus.
• Solo: Isolate the side signal to hear stereo elements exclusively.
• Insert: Process the side signal independently with external processors.

Seamless Integration with SPL Hermes

Gemini is designed to work in conjunction with the SPL Hermes Mastering Router, allowing flexible mid/side processing chains within a mastering setup. By placing the M/S encoder and decoder at different points in the chain, you can:

• Apply EQ to only the mid or side signal.
• Compress stereo width independently.
• Introduce mid/side processing into classic L/R workflows.

The Power of 120V Technology

The SPL 120V SUPRA operational amplifiers provide:

• +/-60V internal voltage: Four times the headroom of standard processors.
• Exceptionally low distortion: -110 dBu THD at 1 kHz.
• Massive dynamic range: 135 dB for the most intricate details.
• Fatigue-free listening: Natural, high-resolution sound, even in complex processing chains.

Built for Precision and Longevity

• 4mm Black Anodized Aluminum Front Panel: A premium, rugged build for long-term durability.
• Solid Aluminum Knobs: High-precision controls for the most critical mastering adjustments.
• Neutrik XLR Connectors: Gold-plated contacts ensure perfect signal transfer.

Specifications

Analog Inputs & Outputs:

• Maximum Input & Output Gain: +32.5 dBu
• Input Impedance: 20 kΩ
• Output Impedance: 75 Ω
• Common Mode Rejection: -79 dBu
• Frequency Range (-3 dB): 10 Hz – 150 kHz
• Crosstalk (1 kHz): -108 dBu
• THD + N (0 dBu, 1 kHz): -110 dBu
• Noise (A-weighted, all stages active): -98.2 dBu
• Dynamic Range: 135 dB

Internal Linear Power Supply:

• Operating Voltage for Analog Audio: +/- 60V
• Operating Voltage for Relays & LEDs: +12V

Mains Power Supply:

• Mains Voltage (Selectable): 230V AC / 50Hz; 115V AC / 60Hz
• Fuse for 230V: T 500 mA
• Fuse for 115V: T 1A
• Power Consumption: Max 40 VA

Dimensions & Weight:

• W x H x D: 482 x 44 x 300 mm (19 x 1.73 x 11.8 inches)
• Unit Weight: 5 kg (11.02 lbs)
• Shipping Weight: 6.8 kg (14.99 lbs)

The SPL Gemini All Black is the ultimate tool for mastering engineers who need full control over stereo imaging and mid/side processing. Whether used standalone or integrated into a Hermes-based routing system, Gemini ensures your mastering process reaches new heights of clarity, precision, and flexibility.