PALMER DELTA 4PM Rackmount 4ch Passive Microphone Splitter with Audio-over-Cat

The Palmer DELTA 4PM is a 4-channel passive microphone splitter built for professional live sound, broadcast, and fixed installation environments. It provides robust and reliable signal splitting with a fully passive design that requires no external power, ensuring maximum operational safety and fail-safe performance in demanding setups.

Housed in a rugged 1U 19-inch steel chassis, each channel of the DELTA 4PM offers one direct thru output and two galvanically isolated, transformer-balanced XLR outputs. The passive passthrough output allows for phantom power transmission, enabling full compatibility with condenser microphones. The signal path is carefully engineered to eliminate ground loop hum and provide low-noise, clean audio at all outputs.

Designed to comply with the AES72 Type 5E standard, the DELTA 4PM includes an Audio-over-Cat input and output that allows all four channels to be transmitted through a single Cat cable. This feature makes the unit particularly valuable for installations with space constraints or where discreet cable runs are essential. Its reversible rack ears allow for front or rear mounting, ensuring flexible integration into any rack system.

Ideal for audio engineers, system integrators, and production crews, the DELTA 4PM offers pure signal fidelity, ease of deployment, and seamless integration with modern audio infrastructures. Engineered in Germany and made in Europe, it delivers exceptional build quality and performance without compromise.

Dimensions (W x H x D): 483 x 44 x 176 mm
Weight: 3.2 kg
Rack Size: 1U, 19-inch
Max Input Level: +4 dBu
Input Impedance: 13 kΩ
Output Impedance: 300 Ω
Transformer Isolation: Yes (1:1:1 ratio)
Crosstalk: -79 dB
Signal Routing: 1 THRU, 2 isolated XLR outputs per channel
Audio-over-Cat Support: AES72 Type 5E
Phantom Power Passthrough: Supported via THRU output
Construction: Steel sheet chassis
Max Air Humidity (non-condensing): 80%
No Power Required – Fully passive design for maximum reliability