BRIDGE 4A Plus DI Boxes Palmer User Manual

BRIDGE 4A Plus DI Boxes Palmer

Specifications:

• Product Name: BRIDGE 4A+
• Type: Four-channel line isolator/ DI-box active
• Intended Use: Event technology, studio, TV, and broadcast
• Recommended Users: Qualified users with specialist knowledge of event technology, studio, TV, and broadcast

Product Usage Instructions

1. Safety Instructions:
Before operating the device, carefully read the safety instructions in the user manual. Observe all warnings provided on the device and in the manual. Always keep the user manual accessible. When transferring or selling the device, include theuser manual as it is an integral part of the product.

2. Intended Use:
This product is designed for professional use in event technology, studio, TV, and broadcast sectors. It is intended for qualified users with specialist knowledge in these areas. Using the product beyond specified technical data and operating conditions is considered improper and may lead to liability for damages. The product is not suitable for children or individuals with limited abilities.

3. Explanations of Terms and Symbols:

• Electric Shock Hazard: Identified by a specific symbol.
• Hazardous Areas/Situations: Indicated by a particular symbol.
• Hot Surfaces: Denoted by a symbol.
• High Volume Levels: Warned by a specific symbol.
• No User-Serviceable Parts: Symbol indicates non-user-serviceable parts.
• Additional Information: Symbol provides extra operational details.
• Dry Room Use: Symbol specifies dry room use only.

4. Device Disconnection:
To completely disconnect the device from the power supply, unplug the power cable or adapter from the socket. Merely pressing the on/off switch is insufficient. Additionally, ensure any connected amplifier is also disconnected from the device.

Frequently Asked Questions

Q: Who is the intended user of the BRIDGE 4A+ product?
A: The product is intended for qualified users with specialist knowledge in event technology, studio, TV, and broadcast sectors.

Q: Can children use the BRIDGE 4A+?
A: No, the product is not suitable for children or individuals with limited physical, sensory, or mental abilities.

Q: How should I disconnect the device from the power supply?
A: To disconnect the device completely, unplug the power cable or adapter from the socket. Pressing the on/off switch alone is not sufficient; also disconnect any connected amplifiers.

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

1. DANGER: The word DANGER, possibly in combination with a symbol, indicates immediately dangerous situations or conditions for life and limb.
2. WARNING: The word WARNING, possibly in combination with a symbol, indicates potentially dangerous situations or conditions for life and limb.
3. CAUTION: The word CAUTION, possibly in combination with a symbol, is used to indicate situations or conditions that may lead to injury.
4. 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:

1. Do not open the device and do not make any modifications.
2. 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.
3. 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.
4. Ensure that live cables are not kinked or otherwise mechanically damaged.
5. Never bypass the device fuse.

WARNING:

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

ATTENTION:

1. 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.
2. 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.
3. 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!
4. Make sure that the fuse used corresponds to the type printed on the device.
5. Ensure that suitable measures have been taken against overvoltage (e.g. lightning strikes).
6. 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:

1. Choking hazard! Plastic bags and small parts must be kept out of reach of persons (including children) with reduced physical, sensory or mental capabilities.
2. Risk of falling! Make sure that the device is securely installed and cannot fall. 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:

1. Use the device in the prescribed manner only.
2. Operate the device using only accessories of the type recommended and supplied by the manufacturer.
3. Observe safety regulations applicable in your country during installation.
4. After connecting the device, ensure that all cables are routed to avoid damage or accidents, such as tripping.
5. 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:

1. 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.
2. Do not place any ignition sources, such as burning candles, near the device.
3. Ventilation openings must not be covered and fans must not be blocked.
4. For transport, use the original packaging or packaging provided by the manufacturer.
5. Avoid any impacts to or shaking of the device.
6. Observe the IP rating and the ambient conditions such as temperature and humidity according to the specifications.
7. Devices can always be further improved. In the event of any discrepancies between the operating instructions and the device labeling about operating conditions, performance or other device characteristics, the information on the device always takes precedence.
8. The device is not suitable for tropical climate zones or operations over 2,000 m above sea level.
9. 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-energize 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:

1. Temporary operation! Event equipment is generally only designed for temporary operation.
2. 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 4A+ four-channel line isolator / active di-box
•  1× power supply unit
• Product data sheet

INTRODUCTION

The Palmer BRIDGE 4A+ 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.

CONNECTIONS, OPERATING AND DISPLAY ELEMENTS – FRONT SIDE

1. INPUT 1 – 4
   Line or instrument inputs with combo sockets (XLR / 6.3 mm jack), which are suitable for both unbalanced and balanced cabling. Use shielded audio cables to connect a keyboard or guitar to the device, for example.

2. 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 is able to effectively reduce or eliminate humming.

3. GAIN 1 – 4
   Two switches for amplifying the input signal by 6 dB, 12 dB and 18 dB. If the switch is not pressed (0 dB), the signal is not amplified. Press the left switch to amplify the signal by 6 dB and the right switch to amplify the signal by 12 dB. If both switches are in the pressed position, the signal is amplified by 18 dB. Make sure that the input channels of a mixer, audio interface, etc. are muted while operating the switches. Otherwise, sudden increases in level could lead to damage.

4. OUTPUT 1 – 4
   Balanced line outputs with 3-pin XLR sockets. Use shielded audio cables (e.g. microphone cables) to connect the Line Isolation Box to a balanced input of a mixer or audio interface.

5. POWER LED
   The power LED lights up when the device is supplied with the required voltage.

6. STRAIN RELIEF
   Use the strain relief for the flexible cable of the power supply unit of the device to protect the low-voltage power supply socket and plug from damage and to prevent the plug from being pulled out unintentionally.

7. POWER INPUT
   Low-voltage socket for supplying power to the device. To avoid damage to the device, please use only the original power supply (included in the packaging content).

8. OUTPUT 1 – 4
   Balanced line outputs with 3-pin XLR sockets. Use shielded audio cables to connect the Line Isolation Box to a balanced input of a mixer or audio interface.

9. PAD 1 – 4 (Passive Attenuation Device)
   Press the switch to reduce the level of the output signal by 20 dB. The output level must be lowered if the channel input stage of the connected mixer or audio interface is overdriven.

10. LIFT / GND OUTPUT AoC
    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 can effectively reduce or eliminate humming.

11. OUTPUT AoC
    Balanced line outputs 1 to 4 with lockable etherCON socket. Separate and analog 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 galvanically 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

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| PBRIDGE4APLUS
Product type| DI Box / Line Isolator
No. of channels| 4
Type| active
Transformer isolated| yes
No. of inputs| 4
Input type| balanced/unbalanced
Input connectors| XLR, 6.3 mm jack
No. of outputs| 4 (+4 parallel, +AoC)
Output type| balanced
Output connectors| XLR, RJ45
THRU outputs per channel| 0
Input attenuation (pad)| 0 dB / 20 dB
Ground/lift switch| yes
Additional functions| AoC output with ground lift, power LED, 6/12/18 dB gain
Operating voltage| 9-18 V
Power consumption| 2 W
Housing| Sheet steel
Dimensions (H/W/D)| 44 × 482 × 90 mm (19″, 1U )
Weight| 2.1 kg
Ambient temperature (for operation)| -20 °C… 70 °C
Relative air humidity| < 80 % (non-condensing)
Included accessories| PW9V external plug-in power supply

AUDIO

Max. input level (< 1% THD, 20Hz)

|

+10 dBu

Max. input level (< 1% THD, 1kHz)| +16 dBu
Max. output level (< 1% THD, 20 Hz – 20kHz)| +7 dBu
Frequency response (±0.5dB, relative 1kHz)| 20 Hz – 20 kHz
Input impedance (1 kHz)| 20 kΩ
Output impedance (1 kHz, setting: 0 dB Pad, THRU)| 84 Ω
THD (30 Hz, +4 dBu, unity, unweighted)| < 0.0023 %
THD (1 kHz, +4 dBu, unity, unweighted)| < 0.0009 %
IMD (SMPTE) (60 Hz / 7 kHz, 4:1, +4 dBu)| < 0.0018 %
SNR (SMPTE) (+4 dBu, 22 kHz BW, unity, unweighted)| 105 dB
Transformer ratio| 10:1

Transformer ratio

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 by 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 rechargeable 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
  Herstellergarantie und Haftungsbeschränkung 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: cdn-shop.adamhall.com/media/pdf/Manufacturers-Declarations- PALMERDE EN_ES_FR.pdf Contact your distribution partner for service.

• CE CONFORMITY
  Adam Hall GmbH hereby confirms 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, and 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 Equipments Regulations 2017 (SI2017/1206) can be downloaded from www.adamhall.com/compliance/

References

• Eventtechnik Lösungen | Adam Hall Group
• cdn-shop.adamhall.com/
• Downloads | Service | Adam Hall Shop
• Downloads | Service | Adam Hall Shop

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