Pro Co LS-82
8-Channel Line Splitter

The Pro Co Multilink LS-82 Eight- Channel Line Splitter splits the signals from each of eight line-level sources into two outputs, as well as provides eight high-quality 1:1 line-level output transformers for applications requiring the high degree of electrical isolation only transformers can provide.

The primary applications for the LS- 82 are in sound reinforcement systems where it may be necessary to break ground loops between pieces of equipment connected with unbalanced lines, as well as feeding two inputs with one source. For instance, the LS-82 can be used to ?oat the unbalanced outputs of an active crossover unit that must drive long cables connected to power ampli?er inputs while still offering the direct output for near?eld monitors.

In such complex systems grounding problems can cause both unacceptable noise levels and severe shock hazards. Transformer isolation in such situations minimizes interference from SCR lighting dimmers, radio transmitters and 60 Hz AC power wiring. Furthermore, the common-mode voltage range of a transformer makes it far more forgiving of improper connections or fault conditions than any “active”, “electronic” or “differential” transformerless circuit. This makes transformer-?oated outputs essential for “goof-proo?ng” portable sound reinforcement systems and installations.

The LS-82 is ?tted with Phoenix COMBICON plug-in screw connectors for LINE IN, DIRECT OUT, and ISO OUT so hookup requires only bare conductors and a screwdriver.

The use of the Pro Co LOT-1 transformer allows the LS-82 to provide ?oating, low-impedance outputs with wide, ?at frequency response, ultra-low distortion, and no ringing or overshoot to degrade transient response. The LOT-1’s dual primary windings allow it to be recon?gured for 1:2 operation if required, providing 6 dB of voltage step-up.

The GND/LIFT switch provides isolation and buzz-free operation in virtually any environment.

The LS-82’s rugged 16–gauge steel and aluminum “Uni–box™” construction enclosure is ?nished in a durable black texture powder coat ?nish with black anodized aluminum side channels. Easy–to–read control graphics are incorporated into the Lexan® front and back panel overlays. Inside, the specially designed transformers combine superb audio quality with unsurpassed noise rejection. The LS-82 can be mounted in any standard 19" (482.6mm) rack. Top-quality connectors and switches provide trouble-free service even in abusive situations such as remote broadcast and recording operations.

Line Input
Phoenix COMBICON plug-in screw connector accepts signals from low-impedance (0 ohm nominal) line-level source. Input impedance (with 600 ohm load on ISO OUT): approx. 680 ohm.

Direct Output
Phoenix COMBICON plug-in screw connector wired in parallel with LINE IN provides signal to feed an additional input.

ISO Out
Phoenix COMBICON plug-in screw connector provides ?oating transformerisolated low-impedance output to feed line-level input. Recommended load impedance: 600 ohm

GND/LIFT
GND position connects pin 1 of LINE IN to pin 1 of ISO OUT. LIFT position “?oats” ISO OUT. Used to reduce hum and buzz by eliminating ground loops and providing proper grounding for various conditions.

Features:

• Provides 2-Way Split for Line Level Outputs
• 8 Channels in a Single Rack Space
• Isolates Unbalanced Line-Level Outputs
• Ideal for Portable and Permanent Sound Systems
• Allows Assembly of Economical Expandable Splitting System
• Connects with Phoenix COMBICON™ Plug-in Screw Connectors
• True Floating Transformer Isolation
• Rugged “Uni-Box™” Construction for Super Strength and Shielding

Specifications:

• Frequency Response: 20 Hz-20 kHz, +/- .5 dB @ 0 dBv output. -3 dB @ approximately 85 kHz.
• Total Harmonic Distortion:
     * Less than .25% 20 Hz-20 kHz @ 0 dBv output.
     * Less than .5% 30 Hz-20 kHz @ +18 dBv output.
     * Less than 1% 20 Hz-20 kHz @ +18 dBv output.
• Phase Response: Less than -3 degrees @ 20 kHz (ref. 1.0 kHz).
• Rise Time: Less than 4.5 microseconds (2.0 kHz square wave, 10%-90%).
• Input Impedance:
     * Greater than 680 ohm @ 1.0 kHz.
     * Greater than 680 ohm @ 10 kHz.
     * Nominal source impedance is 0 ohm.
• Output Impedance:
     * Less than 120 ohm @ 1.0 kHz.
     * Less than 120 ohm @ 10 kHz.
     * Nominal output impedance is 600 ohm.
• Voltage Loss: Less than 2.0 dB @ 1.0 kHz.
• Max. Input Level for 1% THD:
     * +20 dBv @ 20 Hz.
     * +24 dBv @ 30 Hz.
     * +30 dBv @ 50 Hz.