PALMER DELTA 4PL Rackmount 4ch Passive Line Splitter with Audio-over-Cat

The Palmer DELTA 4PL is a professional-grade 4-channel passive line splitter designed for maximum reliability and audio fidelity in both mobile and fixed audio systems. Housed in a rugged 1U 19-inch steel chassis, it offers four independent line-level channels, each with one thru output and two galvanically isolated XLR outputs for balanced signal distribution without degradation or noise.

Engineered to deliver clean, distortion-free audio even at signal levels up to +20 dBu, the DELTA 4PL is ideal for studio, live sound, and installation environments. Transformer-balanced outputs with impedance matching ensure exceptional signal clarity while eliminating ground loop hum. No external power is required, making this unit extremely fail-safe and perfect for critical applications.

In addition to traditional XLR connectivity, the DELTA 4PL features AES72 Type 5E-compliant Audio-over-Cat input and output ports, allowing all four audio channels to be routed over a single Cat cable. This enables fast and discreet cabling options, especially beneficial in space-sensitive or long-run installations.

The unit’s reversible rack ears offer front or rear mounting flexibility to suit various rack configurations. It delivers ultra-low-noise performance with minimal THD and IMD, making it a trusted solution for clean, transparent signal splitting in demanding environments.

Specifications:

Type: Passive
Inputs: 4 balanced XLR (AES72 Type 5E compatible)
Outputs per channel: 1x thru (linked), 2x galvanically isolated XLR
Audio-over-Cat: In and Out (AES72 Type 5E standard)
Max input level: +20 dBu
Input impedance: 10 kΩ
Output impedance: 300 Ω
Transformer ratio: 1:1:1
THD: 0.04% at 1 kHz; 1.5% at 30 Hz
IMD (SMPTE): 0.02%
Construction: Powder-coated steel
Rack size: 1U 19”
Dimensions: 483 x 44 x 176 mm
Weight: 3.35 kg
Humidity tolerance: up to 80% non-condensing

Designed and engineered in Germany, the DELTA 4PL is the ideal passive solution for distributing and managing high-quality audio signals, whether you're running a complex tour, installing a studio, or integrating into a modern AV infrastructure.