User Manual for Palmer River Series iller 1-Channel Line Isolation Box

Quick guide from the manual

The Palmer iller is a 1-channel passive line isolation box designed for professional audio applications in event technology, studios, TV, and broadcast. It provides galvanic isolation between input and output to eliminate hum loops and other interfering signals. The device features a combo input (XLR/6.3 mm jack) and a balanced XLR output, along with a Ground Lift switch.

Intended Use

This product is intended for professional use only by qualified users with specialist knowledge in event technology, studio, TV, and broadcast. It is not suitable for household use. Using the product outside specified technical data and operating conditions is considered inappropriate.

Safety Instructions

• Read these instructions carefully.
• Keep all information and instructions in a safe place.
• Follow the instructions provided.
• Use the device only in the prescribed manner.
• Do not open the device or perform any modifications.
• Choking Hazard: Keep out of reach of children. The product contains small parts and packaging material that can be swallowed.

Introduction

The iller Line Isolation Box is equipped with a combo socket on the input side, which can be assigned with an XLR or 6.3 mm jack plug. The input allows the connection of playback devices with balanced or unbalanced connections. The balanced line output is equipped with a male XLR socket. There is galvanic isolation between input and output by means of a high-quality transformer. With the help of the ground lift switch to disconnect the ground connection of input and output, hum loops and other interfering signals are effectively eliminated. Audio signals can also be transmitted hum-free over long cable runs.

Connections

• 1. INPUT: Line input with combo jack (XLR / 6.3 mm jack) suitable for both unbalanced and balanced cabling. Use a shielded audio cable to connect devices like keyboards.
• 2. OUTPUT: Balanced line-out via 3-pin XLR jack. Use a shielded audio cable to connect to a balanced input of a mixing console or audio interface.
• 3. LIFT / GND: Switch for disconnecting the ground connection from the input and output (ground lift). In the non-pressed position, the ground connection is disconnected; the connection is established when the switch is pressed. The ability to prevent a humming loop depends on the grounding of the connected device.

Wiring Example

The device accepts a balanced or unbalanced signal at the input and provides a balanced or unbalanced signal at the output at the same level, effectively removing ground loop hum.

Technical Data

The iller is a passive 1-channel line isolator with a 1:1 transformer ratio. It features a frequency response of 20 Hz - 20 kHz (±2dB, relative 1kHz) and an input impedance of 17 kΩ. The housing is made of aluminium continuous casting, and the unit weighs 0.3 kg. Operating temperature range is -20°C to 70°C.

Disposal

This device is subject to the European Waste Electrical and Electronic Equipment Directive. Do not dispose of old appliances in household waste. Dispose of the device via an approved disposal company or a municipal disposal facility. Batteries and rechargeable batteries must also be disposed of according to local regulations.