BRIDGE 4A

BRIDGE 4A

19" DI box, 4 channels, active

Item no.: PBRIDGE4A

Guarantee: 60 months

EAN: 4049521911712

Sliding scale: 1

Unit: Piece

Packaging unit: 12

Series:BRIDGE

Item highlights:

  • Balancing and impedance matching for guitar, bass, keyboards & synthesizers
  • Eliminates ground loop hum thanks to galvanic transformer isolation
  • 4 independent DI boxes in a solid 19" housing (1U)
  • Higher output level than a passive DI box
  • THRU-output for passing the input signal
  • Audio over Cat output (AES72 Type 5e) for forwarding all signals via a single Cat cable
  • Pure and unaltered low-noise audio
  • Handles even high-level inputs without distortion thanks to switchable -30dB pad
  • Ground-lift switch for each output
  • Power supply: 9V DC, center negative
  • Engineered in Germany

Specifications

Product type
DI boxes
Type
active
Transformer isolated
yes
Channels
4
Inputs
4
input type
unbalanced
Input connectors
6.3 mm jack
Input pad
0 dB / 30 dB
Number of outputs
4 (+ 4 parallel XLR outs + AoC)
THRU outputs/channel
1
Output type
balanced
Output connectors
RJ45, XLR
Cabinet material
sheet steel
Width
482 mm, 19 "
Depth
90 mm
Height
44 mm, 1 U
Weight
1,96 kg
Ground lift switch
yes
Operating voltage
9 V - 18 V
Power consumption
2 W
Additional Features
power LED, AoC output with ground lift
Ambient temperature during operation
-20 - 70 °C
Relative Humidity
< 80 %, not condensing
Accessories (included)
external power supply PW9V
Max. input level (< 1% THD, 20 Hz)
+ 14 dBu
Max. input level (< 1% THD, 1 kHz)
+ 23 dBu
Max. output level (<1% THD, 20 Hz - 20kHz)
+19 dBu
Frequency response (±0,5 dB, relative 1 kHz)
20 Hz - 20 kHz
Input impedance (1 kHz)
390 kOhm
Output impedance (1 kHz)
110 Ohm(s)
THD + N (30 Hz, +4 dBu, unity, unweighted)
< 0.0026%
THD + N (1 kHz, +4 dBu, unity, unweighted)
< 0.0011%
SNR (+4 dBu, 22 kHz BW, unity, unweighted)
105 dB
IMD (SMPTE) (60 Hz / 7 kHz, 4:1, +4 dBu)
< 0.0021%
Transformer ratio
1:3

Description

BRIDGE 4A

Are you aiming to capture the pure signal from a guitar, bass, or keyboard without any noise and tonal loss, even over long cable runs? In that case, you need a DI box - and a high-quality one at that - to ensure your sound won't be compromised.

The BRIDGE 4A from Palmer is a 4-channel, active DI box in 19" rack format for feeding the unbalanced and high-impedance signals of electric instruments such as guitar, bass, keyboard or synthesiser into the microphone inputs of a mixing console. It provides a transformer-balanced, low-impedance signal at the outputs and eliminates mains hum and interference caused by ground loops. This keeps the sound unadulterated: brilliant, low-noise and without interference.

Each channel is equipped with a 6.3 mm jack input, a THRU-Out (for forwarding the input signals to an amplifier, for example), and two transformer-balanced XLR outputs - one at the front and one at the rear.

Thanks to a switchable 30dB pre-attenuation, the BRIDGE 4A can be fed with extremely high input levels in addition to line signals, which means it can even be looped in between the amplifier output and speakers, for example. The Audio-Over-Cat output enables the signals of all 4 channels to be routed via a single Cat (Cat5e or higher) cable. This saves material, space and time. The active circuit leaves the frequency response unaffected, achieves a high dynamic range and delivers a higher output level than a passive DI box.

The BRIDGE 4A is the ideal solution for audio technicians, semi-professional and professional musicians as well as recording studios that value reliable and durable products.

Accessories

Spare parts

PW 9 V
PW9V
Standard 9 V Power Pack
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Downloads

Manuals
Data Sheets & Specifications
Images & Artwork
Catalogues & Publications
Service & Regulation Documents
Display all
Name
Type
Format
File size
PBRIDGE4A User Manual User Manual.pdf2.49 MB
PBRIDGE4A Product Data Sheet Product Data Sheet.pdf2.98 MB
Palmer REACh Declaration Adam Hall GmbHREACh Declaration.pdf493.71 KB
Palmer RoHS Confirmation Adam Hall GmbHRoHS Confirmation.pdf197.63 KB
Palmer Catalogue / Brochure Highlight Brochure - Audio ToolsCatalogue / Brochure.pdf8.17 MB
Palmer Catalogue / Brochure Highlight Brochure - Guitar ToolsCatalogue / Brochure.pdf10.9 MB
Palmer Catalogue / Brochure Adam Hall Group Product Highlights Spring/Summer 2025Catalogue / Brochure.pdf24.23 MB
Palmer Catalogue / Brochure Palmer 2023Catalogue / Brochure.pdf30.99 MB
Palmer Catalogue / Brochure Highlight Brochure - Studio GearCatalogue / Brochure.pdf10.09 MB
Palmer Manufacturer's Declaration PALMERManufacturer's Declaration.pdf66.79 KB
Product ImagesImages & Artwork.zip-

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