Palmer DELTA 4PM - 4-channel passive microphone splitter with audio over Cat
DELTA 4PM is a passive 4-channel microphone splitter for professional audio applications and part of the Pamer Audio over Cat ecosystem. It enables reliable signal distribution from microphone-level sources to multiple outputs without the need for external power.
DELTA 4PM complies with the common AES72 Type 5E standard and is fully compatible with such Audio-over-Cat systems, while also integrating easily into existing infrastructures.
Each of the four channels features one THRU output for passing on phantom power, as well as two galvanically isolated, transformer-balanced XLR outputs. The design includes impedance matching and resistor-decoupled isolation to ensure clean signal routing, eliminate ground loop noise and preserve phantom power functionality. All 4 channels can also be routed via a single Cat cable, which is especially useful in fixed installations with limited or discreet cable runs.
The rugged 1U 19-inch enclosure is built for standard rack mounting in both fixed installations and mobile environments. The reversible rack ears allow convenient mounting from the front or rear, providing easier access to the most frequently used connections.
Ideal for live sound, installations and recording setups where passive splitting of microphone signals, Audio-over-Cat integration and uncompromising reliability are essential. DELTA 4PM delivers low-noise, unaltered audio with maximum operational reliability. Developed in Germany. Made in Europe.
- 4 independent microphone splitters in a solid 19" housing (1U)
- 3 balanced XLR outputs per channel (1x THRU output and 2x galvanically isolated)
- Balancing and impedance matching for microphone signals
- Audio over Cat In- and output (AES72 Type 5E) for forwarding all signals via a single Cat cable
- Passive passthrough (THRU) allows phantom power transmission
- Two transformer-isolated outputs per channel, each decoupled via resistors
- Designed for professional mic-level signals up to +4dBu
- Extremely fail-safe, no power supply required
- Pure and unaltered low-noise audio
- Engineered in Germany, Made in Europe
General
| Type | Passive |
| Isolated transformer | Yes |
| Transformer Ratio | 1:1:1 |
| Ground Lift | Yes |
| Number of inputs | 4 |
| Number of outputs | 12 |
| Number of channels | 4 |
Inputs
| Input signal type | AES72 (type 5E) |
| Input signal type | Balanced |
| Max. input level (< 1% THD, rel. 20 Hz) | 4 dBu |
| Max. input level (< 1% THD, rel. 1 kHz) | 4 dBu |
| Input impedance (Ra = 1 kΩ) | 13 kΩ |
Outputs
| Output signal type | AES72 (type 5E) |
| Output signal type | Balanced |
| Number of line outputs | 2 |
| Output impedance (Ra = 600 Ω) | 300 Ω |
| Linked outputs per channel | 1 |
Line output performance
| Balanced output impedance (1 kHz) | 380 Ω |
Signal processing
| Max. THD (1 kHz, +4 dBu, unity, unweighted) | 0.05 % |
| Max. THD (30 Hz, +4 dBu, unity, unweighted) | 2.6 % |
| Max. IMD (SMPTE, 7 kHz, 4:1, +4 dBu) | 0.001 % |
| Max. IMD (SMPTE, 60 Hz, 4:1, +4 dBu) | 0.001 % |
Housing
| Chassis material | Steel sheet |
Environmental
| Maximum air humidity (non-condensing) | 80 % |
Dimensions & weight
| Width | 483 mm |
| Height | 44 mm |
| Depth | 176 mm |
| Rack width | 19" |
| Rack height | 1 U |
| Weight | 3.2 kg |
If you have questions about this product before placing an order, please contact our staff – we get back to you as quickly as possible, and always within 24 hours on weekdays.
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