Palmer PAN 03 PASS - 4-channel passive DI box 19” rack unit When you need to organize your signal flow on stage, in an installation rack, or within a mobile PA system, reliability, ease of use, and consistent performance are essential. The Palmer PAN 03 PASS is a 4-channel passive DI box designed for standard 19” rack mounting (1U). It allows you to conveniently convert unbalanced signals into balanced ones, reduce the risk of noise and hum, and prepare your audio signal for connection to mixers, PA systems, or studio equipment. This is a practical solution for sound engineers, event companies, AV installers, and musicians who expect stable performance and quick access to all connections and controls from the front panel.

Product Features The key advantage of this unit is the integration of four independent channels in a single 19” rack enclosure. Each channel features a 6.3 mm jack input and a parallel output for signal routing. This allows you to split the signal to a mixing console while maintaining a connection to an amplifier, monitoring system, or other equipment. The passive design eliminates the need for power supply, simplifying setup and increasing reliability during concerts, rehearsals, conferences, and permanent installations.

Effective Signal Isolation and Professional Integration The unit uses transformer-based balancing, making it ideal for reducing interference and ensuring stable signal transmission over longer cable runs. With a maximum input level of up to +54 dBu, it offers high flexibility when working with various signal sources. The 0/-30 dB attenuation switch helps adapt the unit to line-level or speaker-level signals. A ground lift function is also available, which is essential for eliminating ground loops and hum in complex audio systems. All key connections and switches are located on the front panel, allowing for quick setup even in tight rack spaces. Additionally, rear XLR outputs help maintain clean cable management in both touring and fixed installations. The frequency response of 10 - 40000 Hz supports accurate signal transmission across a wide audio range.

Applications This format proves useful in many scenarios. The unit is ideal for keyboards, media players, samplers, audio interfaces, sound modules, and other signal sources that need clean and secure routing to a mixing console. It works equally well in live sound systems, conference setups, rehearsal rooms, cultural centers, houses of worship, and project studios. Four channels in a single rack unit save space, reduce setup time, and improve cable organization. It is also an excellent choice for rental companies that require versatile and ready-to-deploy solutions for different types of events.

Technical Specifications Product type: DI box Type: passive Number of channels: 4 Number of inputs: 4 Inputs: 6.3 mm jack Maximum input level: +54 dBu Input impedance: 68 kOhm at 60 Hz Input attenuation: 0 / -30 dB Number of outputs: 4 + 4 parallel outputs THRU outputs per channel: 1 Outputs: 6.3 mm jack, XLR Maximum output level: +4 dBu Output impedance: 600 Ohm Frequency response: 10 - 40000 Hz Transformer balanced: yes Transformer ratio: 10 Controls: attenuation, ground lift Rack format: 19”, 1U height Dimensions: 480 x 90 x 45 mm Weight: 1.43 kg Construction and Build The unit features a solid steel construction with a durable powder-coated finish. This design ensures resistance to intensive use and makes it suitable for both stage and installation environments. The 1U rack format allows easy integration into standard racks, while the logical layout of connectors supports efficient signal routing. It is designed for everyday professional use, where durability, reliability, and ease of operation are crucial.

Included in the Box The package includes the main unit: a 4-channel passive DI box in a 19” rack format (1U). The manufacturer does not specify additional accessories on the product page, so no extra items are assumed to be included.

In practice, this means fewer adapters, fewer separate devices, and a more consistent setup. Instead of building a multi-channel system using multiple DI boxes, you can rely on one compact unit. This saves rack space, simplifies maintenance, and speeds up setup and teardown. For many users, this translates into better workflow and improved organization of the entire audio system.

Summary If you are looking for a reliable way to manage multiple signals within a single rack unit, the Palmer PAN 03 PASS is a smart choice. You get four independent channels, passive operation without power requirements, switchable attenuation, ground lift functionality, and a convenient set of connections for both live and installation use. It helps streamline setup, reduce noise issues, and maintain professional signal integrity in a wide range of applications.