Palmer BRIDGE 4P DI Four channel DI Box passive User Manual

: September 11, 2024
: Palmer

Palmer BRIDGE 4P DI Four channel DI Box passive User Manual

INFORMATION ON THIS USER MANUAL

Carefully read the safety instructions and the entire manual before operating the device.

Observe the warnings on the device and in the user manual.
Always keep the user manual within reach.
If you sell or pass on the device, it is important that you also include this user manual, as it is an integral part of the product.

INTENDED USE

This product is a device for event technology, as well as studio, TV and broadcast!

The product has been developed for professional use in the event technology, studio, TV and broadcast sectors.
Furthermore, this product is only intended for qualified users with specialist knowledge of event technology, as well as studio, TV and broadcast!
Use of the product outside the specified technical data and operating conditions is considered improper use!
Liability for damage and third-party damage to persons and property due to inappropriate use is excluded!
The product is not suitable for:
- Use by persons (including children) with limited physical, sensory or mental abilities or lack of experience and knowledge.
- Children (children must be instructed not to play with the device).

EXPLANATIONS OF TERMS AND SYMBOLS

DANGER : The word DANGER, possibly in combination with a symbol, indicates immediately dangerous situations or conditions for life and limb.
WARNING : The word WARNING, possibly in combination with a symbol, indicates potentially dangerous situations or conditions for life and limb.
CAUTION : The word CAUTION, possibly in combination with a symbol, is used to indicate situations or conditions that may lead to injury.
ATTENTION : The word ATTENTION, possibly in combination with a symbol, refers to situations or conditions that can lead to damage to property and/or the environment.

This symbol identifies hazards that can cause electric shock.

This symbol identifies hazardous areas or hazardous situations.

This symbol indicates hazards caused by hot surfaces.

This symbol indicates dangers due to high volume levels.

This symbol denotes a device that does not contain any user-serviceable parts.

This symbol indicates additional information on the operation of the product.

This symbol indicates a device that may only be used in dry rooms.

SAFETY INSTRUCTIONS

DANGER:

Do not open the device and do not make any modifications.
If your device no longer functions properly, if liquids or objects get inside it or if it has been damaged in any other way, switch it off immediately and disconnect it from the mains. The device may be repaired only by authorised repair technicians.
For devices of protection class 1 the protective conductor must be connected correctly. Never disconnect the protective conductor. Devices of protection class 2 do not have a protective earth conductor.
Ensure that live cables are not kinked or otherwise mechanically damaged.
Never bypass the device fuse.

WARNING:

The device must not be used if it shows obvious signs of damage.
The device may only be installed in a voltage-free state.
If the power cable or power supply unit of the device is damaged, the device must not be put into operation.
Permanently connected power cables may only be replaced by a qualified person.

ATTENTION:

Do not switch on the device if it has been exposed to extreme temperature fluctuations (for example, following transport). Moisture and condensation can damage the device. Switch on the device only when it has reached ambient temperature.
Ensure that the voltage and frequency of the mains supply match the values specified on the device.
If the device has a voltage selector switch, do not turn the device on until it has been set correctly. Use only suitable power cables.
To disconnect the device completely from the power supply, unplug the power cable or the power adapter from the socket. It is not sufficient to press the on/off switch on the device. In addition, a connected amplifier must also be disconnected from the device!
Make sure that the fuse used corresponds to the type printed on the device.
Ensure that suitable measures have been taken against overvoltage (e.g. lightning strikes).
Observe the specified maximum output current on devices with a Power Out connection. Ensure that the total current consumption of all connected devices does not exceed the specified value.
Replace plug-in power cables with original cables only

DANGER:

Choking hazard! Plastic bags and small parts must be kept out of reach of persons (including children) with reduced physical, sensory or mental capabilities.
Risk of falling! Make sure that the device is securely installed and cannot fall down. Only use suitable stands or mounts (particularly for fixed installations). Ensure that accessories are properly installed and secured. Ensure that all applicable safety regulations are observed.

WARNING:

Use the device in the prescribed manner only.
Operate the device using only accessories of the type recommended and supplied by the manufacturer.
Observe safety regulations applicable in your country during installation.
After connecting the device, ensure that all cables are routed so as to avoid damage or accidents, such as from tripping.
Be sure to observe the specified minimum distance to normally flammable materials! Unless explicitly stated, the minimum distance is 0.3 m.

CAUTION:
Moving components such as mounting brackets pose a jamming hazard.

ATTENTION:

Do not install or use the device in the vicinity of radiators, accumulators, stoves, or other heat sources.
Ensure that the device is always installed in such a way that it is sufficiently cooled and cannot overheat.
Do not place any ignition sources, such as burning candles, near the device.
Ventilation openings must not be covered and fans must not be blocked.
For transport, use the original packaging or packaging provided by the manufacturer.
Avoid any impacts to or shaking of the device.
Observe the IP rating and the ambient conditions such as temperature and humidity according to the specifications.
Devices can always be further improved. In the event of any discrepancies between the operating instructions and the device labelling with regard to operating conditions, performance or other device characteristics, the information on the device always takes precedence.
The device is not suitable for tropical climate zones or for operation over 2,000 m above sea level.
Unless explicitly stated, the device is not suitable for operation under marine conditions.

PLEASE NOTE : For conversion or retrofit sets or accessories provided by the manufacturer, it is essential to observe the included instructions.

CAUTION, HIGH VOLUME AUDIO PRODUCTS!
This device is designed for professional use. The commercial operation of this device is subject to the applicable national regulations and guidelines for accident prevention.

Hearing damage due to high volume and continuous exposure: Use of this product may generate high sound pressure levels (SPL) that may cause hearing damage. Avoid exposure to high volumes.

CAUTION : Connecting signal cables and switching operations (e.g. switching phantom power on and off) can cause considerable noise. Make sure that input channels (mixer, audio interface, effects device, etc.) are muted while making connections and operating switches. Otherwise, noise levels may cause damage.

WARNING : To completely de-energise the device, unplug the mains adapter from the socket AND disconnect any connected amplifier from the device.

CAUTION : Make sure that the ventilation openings in the housing of the device are not covered during operation and that air can circulate freely, especially when rack-mounted!

NOTE : Strong magnetic fields can cause humming. Therefore, do not position the device in the vicinity of strong magnetic fields (e.g. mains transformer).

NOTES FOR PORTABLE INDOOR DEVICES:

Temporary operation! Event equipment is generally only designed for temporary operation.
Continuous operation or permanent installation can impair the functioning of the device and cause premature ageing.

PACKAGING CONTENT

Remove the product from the packaging and remove all packaging material.
Please check the completeness and integrity of the delivery and notify your distribution partner immediately after purchase if the delivery is not complete or if it is damaged.

The packaging content includes:

1× BRIDGE 4P four-channel passive DI box
Product data sheet

INTRODUCTION

The Palmer BRIDGE 4P has 4 independent channels, which are technically identical. It is a professional tool for studio and stage, which converts an unbalanced audio signal into a balanced audio signal without distortion.
The internal transformer offers excellent dynamic range and outstanding overload stability. The DI box is used as a connecting link to connect string instruments with pickups, such as electric acoustic guitars, electric guitars and electric basses, instruments with line outputs, such as keyboards, as well as loudspeaker outputs from guitar amplifiers to balanced inputs of a mixer or audio interface. In addition, the DI box allows for interference-free transmission of audio signals over long cable runs.

WARNING : Power amplifiers must not be operated in bridge mode when connected to the DI box.

WARNING : If an amplifier is connected to the DI box, the ground connection between input and output must be disconnected (switch no. 4 in position LIFT (not pressed)).

WARNING : The output power of a connected amplifier must not exceed 120 W at 8 ohms!

ATTENTION : When using a tube amplifier: There is no load resistor in the DI box circuit! To prevent damage to the amplifier, an appropriate guitar speaker or a suitable load resistor must be connected to the THRU jack using a speaker cable before switching on the amplifier!

CONNECTIONS, OPERATING AND DISPLAY ELEMENTS – FRONT SIDE

Connection Operating Display

INPUT 1 – 4
Audio inputs with 6.3 mm jack sockets (suitable for unbalanced and balanced cabling).
A. Connect an instrument using a shielded instrument cable.
B. Connect the speaker output of a guitar amplifier using a speaker cable (tip: press PAD switch no. 3).
THRU 1 – 4
The unaltered input signals of channels 1 – 4 are output via the THRU 1 to 4 6.3 mm jack sockets.
PAD 1 – 4 (Passive Attenuation Device)
Press the switch to reduce of the output signal by 30 dB. The output level must be lowered if the channel input stage of the connected mixer or audio interface is overdrive.
LIFT / GND 1 – 4
Switch for disconnecting the ground connection between 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 using the ground lift switch depends on the grounding of the connected devices. It is therefore possible that either switch position effectively reduces or eliminates humming.
OUTPUT 1 – 4
Balanced line outputs with 3-pin XLR sockets. Use shielded audio cables (e.g. Microphone cables) to connect the DI box to a balanced input of a mixer or audio interface.
CONNECTIONS, OPERATING AND DISPLAY ELEMENTS – REAR
OUTPUT 1 – 4
Balanced line outputs with 3-pin XLR sockets. Use shielded audio cables to connect the DI box to a balanced input of a mixer or audio interface.
LIFT / GND OUTPUT 1 – 4 AoC
Switch for disconnecting the ground connection between inputs and outputs (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 using the ground lift switch depends on the grounding of the connected devices. It is therefore possible that either switch position effectively reduces or eliminates humming.
OUTPUT 1 – 4 AoC
Balanced line outputs 1 to 4 with lockable ether CON socket. Separate and analogue transmission of channels 1 to 4 via network cable to a compatible device with an RJ45 socket (cable type Cat5e or better, 4 wire pairs plus shielding).

NOTES

The line outputs on the front and rear are galvanic ally isolated from the line inputs.
If several line outputs are used simultaneously on one channel, the signal level may be slightly reduced.

CARE, MAINTENANCE AND REPAIR

In order to ensure the long-term, proper functioning of the device, it must be regularly cleaned and, if necessary, serviced. The maintenance requirement depends on the intensity of use and the environment in which it is used.

We recommend a visual inspection before each operation. Furthermore, we recommend carrying out all the applicable maintenance measures specified below once every 500 operating hours or, in the case of a lower intensity of use, at the latest after one year. Warranty claims may be limited should defects result from inadequate service and maintenance.

WARNING! Before carrying out any care or maintenance, the power supply – and, if possible, all device connections – must be disconnected.

PLEASE NOTE! Improper care can lead to impairment of the device or even its destruction.

Housing surfaces must be cleaned with a clean, damp cloth. Make sure that no moisture can penetrate the device.
Air inlets and outlets must be regularly cleaned of dust and dirt. If compressed air is used, make sure that damage to the device is prevented (e.g. fans must be blocked in this case).
Cables and connectors must be cleaned regularly and dust and dirt must be removed.
In general, no cleaning or disinfection agents or abrasive agents may be used, as they may damage the surface finish. Solvents in particular, such as alcohol, can impair the function of housing seals.
Devices must generally be stored dry and protected from dust and dirt.

MAINTENANCE AND REPAIR (qualified personnel only)

DANGER! There are live components in the device. Even after disconnecting from the mains, there may still be residual voltage in the device, e.g. due to charged capacitors.

PLEASE NOTE! There are no user-serviceable assemblies in the device.

PLEASE NOTE!Maintenance and repair work may only be carried out by qualified specialist personnel authorised by the manufacturer. If in doubt, consult the manufacturer.

PLEASE NOTE! Improperly performed maintenance work may affect warranty claims.

TECHNICAL SPECIFICATIONS

GENERAL

Product number	PBRIDGE4P
Product type	DI box
No. of channels	4
Type	passive
Transformer isolated	yes
No. of inputs	4
Input type	unbalanced
Input connectors	6.3 mm jack
No. of outputs	4 (+4 parallel, +AoC)
Output type	balanced
Output connectors	XLR, RJ45
THRU outputs per channel	1
Input attenuation (pad)	0 dB / 30 dB
Ground/lift switch	yes
Additional functions	AoC output with Grond Lift
Housing	Sheet steel
Dimensions (H/W/D)	44 × 482 × 90 mm (19″, 1U )
Weight	1.92 kg
Ambient temperature (for operation)	-20 °C… 70 °C
Relative air humidity	< 80 % (non-condensing)

AUDIO
Max. input level (< 1% THD, 20Hz)| +21 dBu
Max. input level (< 1% THD, 1kHz)| +25 dBu
Frequency response (±0.5dB, relative 1kHz)| 20 Hz – 20 kHz
Input impedance (1 kHz)| 27 kΩ
Output impedance (1 kHz, setting: 0 dB Pad, THRU)| 30 Ω
THD (30 Hz, +4 dBu, unity, unweighted)| < 0.029 %
THD (1 kHz, +4 dBu, unity, unweighted)| < 0.0006 %
IMD (SMPTE) (60 Hz / 7 kHz, 4:1, +4 dBu)| < 0.0012 %
Transformer ratio| 1:10

All measurements were performed with a generator with an output impedance of 600 Ω and 1 kΩ balanced load.

CORRECT DISPOSAL OF THIS PRODUCT

PACKAGING:

Packaging can be fed into the reusable material cycle using the usual disposal methods.
Please separate the packaging in accordance with disposal laws and recycling regulations in your country.

DEVICE:

This device is subject to the European Waste Electrical and Electronic Equipment Directive in the currently valid version.
WEEE Waste Electrical and Electronic Equipment Directive. Old appliances do not belong in household waste. The old device must be disposed of via an approved disposal company or a municipal disposal facility. Please observe the applicable regulations in your country!
Observe all disposal laws applicable in your country.
As a private customer, you can obtain information on environmentally friendly disposal options from the seller of the product or the appropriate regional authorities.

BATTERIES:

Batteries should not be disposed of in household waste. Batteries and recharge able batteries must be disposed of via an approved disposal company or a municipal disposal facility.
Observe all disposal laws applicable in your country.
As a private customer, you can obtain information on environmentally friendly disposal options from the seller of the product or through the relevant regional authorities.
Devices with batteries that cannot be removed by the user must be taken to a collection point for electrical appliances.

MANUFACTURER’S DECLARATIONS

Manufacturer’s warranty & limitation of liability
Adam Hall GmbH
Adam-Hall-Str. 1
61627 Neu-Anspach, Germany
Email: Info@adamhall.com / +49 (0)6081 / 9419-0.

Our current warranty conditions and limitation of liability can be found at: c dn-shop.adamhall.com/media/pdf/Manufacturers-Declarations PALMER_DE_EN_ES_FR.pdf
Contact your distribution partner for service.

CE CONFORMITY

Adam Hall GmbH hereby confirm that this product meets the following guidelines (where applicable):
Low-Voltage Directive (2014/35/EU)
EMC Directive (2014/30/EU)
RoHS (2011/65/EU)
RED (2014/53/EU)

CE DECLARATION OF CONFORMITY

Declarations of conformity for products that are subject to the LVD, EMC, RoHS Directives, can be requested at info@adamhall.com.
Declarations of conformity for products that are subject to the RED Directive can be downloaded at www.adamhall.com/compliance/

FCC STATEMENT

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation.

UKCA- Conformity

Hereby, Adam Hall Ltd. declares that this product meets the following guidelines (where applicable) Electrical Equipment (Safety) Regulations 2016 Electromagnetic Compatibility Regulations 2016 (SI 2016/1091). The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulation 2012 (SI 2012/3032) Radio Equipment Regulations 201 7(SI 2016/2015)

Adam Hall Ltd. | The Seedbed Bus. Centre | SS3 9QY Essex | UK

UKCA- DECLARATION OF CONFORMITY

Products that are subject to Electrical Equipment (Safety) Regulation 2016, EMC Regulation 2016 or RoHS Regulation can be requested at info@adamhall.com Products that are subject to the Radio Equipment Regulations 2017 (SI2017/1206) can be downloaded from www.adamhall.com/compliance/

SUBJECT TO MISPRINTS AND ERRORS, AS WELL AS TECHNICAL OR OTHER MODIFICATIONS!

Documents / Resources

| Palmer BRIDGE 4P DI Four channel DI Box passive [pdf] User Manual
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