





Item no.: PBRIDGE4APLUS
Guarantee: 60 months
EAN: 4049521911729
Sliding scale: 1
Unit: Piece
Packaging unit: 12
Series:BRIDGE
Item highlights:
- For connecting devices with unbalanced or balanced outputs to PA systems
- Reliably eliminates ground loop hum thanks to galvanic transformer isolation
- Combo inputs, can be used with XLR connectors or 1/4" jacks
- 2 balanced XLR outputs per channel
- Audio over Cat output (AES72 Type 5e) for forwarding all signals via a single Cat cable
- Ground-lift switch for each output
- Solid 19" housing, 1U
- Power supply: 9-18V DC, center negative
- Engineered in Germany
Specifications
Description
BRIDGE 4A+
The BRIDGE 4A+ is a multifunctional device: each of the four channels can be used independently as an active DI box, a line isolation box, or a booster. The input combo socket accepts unbalanced and balanced signals. The outputs are designed as two transformer-balanced XLR sockets per channel (one on the front and one on the rear).
The galvanic isolation via transformer eliminates hum loops, and the ground lift switch can also be used to eliminate noise and interference that occurs with already balanced input signals. The Palmer BRIDGE 4A+ reliably eliminates any hum - and when connecting unbalanced equipment, the signal is also balanced.
If necessary, the signal level can be raised in three stages by 6dB, 12dB or 18dB. The audio over Cat output allows the signals of all 4 channels to be routed via a single Cat cable. This saves material, space, and time.
The BRIDGE 4A+ line isolation box is a universal problem solver for eliminating ground loops. Whether it's at home, at lectures, in the rehearsal room, on stage, in clubs, or at large events - the Palmer BRIDGE 4A+ ensures a clean sound without interference anywhere.
Spare parts

Downloads
Name | Type | Format | File size | ||
---|---|---|---|---|---|
PBRIDGE4APLUS User Manual | User Manual | 2.49 MB | |||
PBRIDGE4APLUS Product Data Sheet | Product Data Sheet | 2.98 MB | |||
Palmer REACh Declaration Adam Hall GmbH | REACh Declaration | 493.71 KB | |||
Palmer RoHS Confirmation Adam Hall GmbH | RoHS Confirmation | 197.63 KB | |||
Palmer Catalogue / Brochure Highlight Brochure - Audio Tools | Catalogue / Brochure | 8.17 MB | |||
Palmer Catalogue / Brochure Highlight Brochure - Guitar Tools | Catalogue / Brochure | 10.9 MB | |||
Palmer Catalogue / Brochure Adam Hall Group Product Highlights Spring/Summer 2025 | Catalogue / Brochure | 24.23 MB | |||
Palmer Catalogue / Brochure Palmer 2023 | Catalogue / Brochure | 30.99 MB | |||
Palmer Catalogue / Brochure Highlight Brochure - Studio Gear | Catalogue / Brochure | 10.09 MB | |||
Palmer Manufacturer's Declaration PALMER | Manufacturer's Declaration | 66.79 KB | |||
Product Images | Images & Artwork | .zip | - |
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