Transform Your Desktop Unit Into a Mastering-Grade Monitor Controller
The SPL Expansion Rack (Silver) addresses a common studio logistics problem: how to cleanly integrate desktop audio components into a professional 19-inch rack frame while managing multiple studio monitor setups. While devices like the Phonitor or SMC 7.1 offer industry-defining audio quality and matrix functions, their desktop enclosures are typically limited in back-panel speaker routing options.
The Expansion Rack acts as a functional bridge for your studio infrastructure. By loading your compatible silver-faced device into this rugged steel framework, you instantly gain a high-performance, manual speaker switching matrix. It allows engineering rooms to control up to four distinct stereo playback groups—such as far-fields, mid-fields, near-fields, and a reference sub-woofer system—without purchasing a standalone active monitor switcher.
Product Description
Pure Passive Signal Management:
The defining characteristic of the Expansion Rack is its completely passive 1x4 filter routing matrix. The audio path features no active internal electronics, integrated circuits (ICs), transistors, or operational amplifiers that could introduce noise, phase shifts, or harmonic distortion. Because it is entirely passive, the unit requires no power supply or external mains connections to function. The raw, uncolored line output from your loaded Phonitor or SMC unit flows directly into heavy-duty rotary mechanics, delivering the highest possible analog audio fidelity to your power amps and active monitor arrays.
Extended Functionality and Control Routing:
When a compatible device like the Phonitor 2 or Phonitor 3 is docked inside the Expansion Rack, its master processing features are immediately extended across your entire monitoring chain. For example, the host machine’s high-voltage Phonitor Matrix, along with structural monitoring commands—such as Left/Right Phase Reverse, Solo L/R, Mono summing, and master Mute—can be applied to any speaker pair selected on the rack's front panel.
Flexible Desktop and Rackmount Conversion:
Designed with studio versatility in mind, the Expansion Rack accommodates changing room layouts effortlessly. It comes equipped with heavy-duty removable rack ears for standard 19-inch equipment bay installation. If you prefer to keep your gear within arm's reach on your desk or mixing console bridge, simply unscrew the rack ears. The bottom panel is threaded so you can install the original isolation feet of your docked device, turning the setup into a stable, freestanding desktop monitor hub.
Key Features
MASTER INTEGRATION CHASSIS: Converts high-end SPL desktop gear into an organized 2U 19-inch rackmount hardware layout.
PASSIVE 1-TO-4 SPLITTER SWITCH: Built-in rotary switch passively splits one stereo line input into four selectable stereo output paths.
ZERO-COLORATION SIGNALS: Operates without any power supply or active electronics, keeping your signal path entirely transparent and buzz-free.
EXPANDED MONITORING MATRIX: Extends all core processing tools of your docked unit (Mono, Mute, Solo, Phase Reverse) across four speaker sets.
MATCHING SILVER FINISH: Features an anodized silver front finish engineered to match your silver Phonitor or SMC controller seamlessly.
UNIVERSAL UNIT COMPATIBILITY: Fully optimized to secure and integrate the Phonitor 2, Phonitor 3, Phonitor 3 DAC, and SMC 7.1.
REMOVABLE RACK GEAR SECTIONS: Modular chassis design allows quick removal of rack ears to convert into a tabletop desktop housing.
ALL-XLR AUDIO BALANCING: Outfitted with premium, gold-plated balanced XLR input and output sockets for clean, professional studio cabling.
Technical Specifications
Feature
Specification
Device Type
2U 19" Hardware Rack-Mount Housing and Passive Speaker Selector
