BRIDGE 4A 19" DI box, 4 channels, active

Item No.: PBRIDGE4A

Series: BRIDGE

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

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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

Description

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.

Specifications

General data

Product type

DI boxes

Type

active

Transformer isolated

yes

Channels

Inputs

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

Output type

balanced

Output connectors

RJ45, XLR

Cabinet material

sheet steel

Width

482 mm

Width

19 "

Depth

90 mm

Height

44 mm

Height

1 U

Weight

1,96 kg

Ground lift switch

yes

Operating voltage

9 V

Power consumption

2 W

Additional Features

AoC output with ground lift, power LED

Ambient temperature during operation

-20 - 70 °C

Relative Humidity

< 80 %, not condensing

Accessories (included)

external power supply PW9V

Audio

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%

IMD (SMPTE) (60 Hz / 7 kHz, 4:1, +4 dBu)

< 0.0021%

SNR (+4 dBu, 22 kHz BW, unity, unweighted)

105 dB

Transformer ratio

1:3

Name	Category	Type	File size
User manual	Manual	pdf	2 MB
Information sheet	Data Sheet	pdf	3 MB
Palmer Catalogue	Catalog	pdf	31 MB
Product images	Image files	zip	-