Palmer DELTA 4PM - 4-Channel Passive Microphone Splitter with Audio-over-Cat
Delivery time: approx. 1 week
- 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
DELTA 4PM is a passive 4-channel microphone splitter for professional audio applications and part of the Pamer Audio over Cat ecosystem. It allows reliable signal distribution from mic-level sources to multiple outputs without the need for external power.
Compliant with the common AES72 Type 5E standard, DELTA 4PM is fully compatible with such Audio-over-Cat systems and integrates easily into existing infrastructures.
Each of the four channels features one THRU output for phantom power passthrough, along with 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 cabling.
The rugged 1U 19-inch housing is built for standard rack mounting in both fixed installations and mobile environments. The reversible rack mounts allow convenient mounting from the front or rear for easier access to the most frequently used connections.
Ideal for live sound, installations, and recording setups where passive mic signal splitting, Audio-over-Cat integration, and uncompromising reliability are essential. DELTA 4PM delivers low-noise, unaltered audio with maximum operational safety. Engineered in Germany. Made in Europe.
Technical data: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 |
| Input signal type: | AES72 (type 5E), Balanced |
| Max. input level ( | 4 dBu: |
| Max. input level ( | 4 dBu: |
| Input impedance (Ra = 1 kO): | 13 kO |
| Output signal type: | AES72 (type 5E), Balanced |
| Number of line outputs: | 2 |
| Output impedance (Ra = 600 O): | 300 O |
| Linked outputs per channel: | 1 |
| Balanced output impedance (1 kHz): | 380 O |
| 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 % |
| Chassis material: | Steel sheet |
| Maximum air humidity (non-condensing): | 80 % |
| Width: | 483 mm |
| Height: | 44 mm |
| Depth: | 176 mm |
| Rack width: | 19" |
| Rack height: | 1 U |
| Weight: | 3.2 kg |
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Information about the manufacturerObligation to provide information on product safety (GPSR)Manufacturer:Adam Hall GmbH
Adam-Hall-Str. 1
DE-61267 Neu-Anspach
[email protected] -
Safety instructions and warningsSafety instructions and warnings (GPSR)Specific safety instructions that apply to the product can be found in the operating instructions for the product.
| Mon-Fri: | 08:00 am – 05:00 pm |
Delivery time: approx. 1 week
| Mon-Fri: | 08:00 am – 05:00 pm |