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Palmer PAN 04 A Active Two-channel DI Box
Introducton
The Palmer PAN 04 A Active Two-channel DI Box is a professional studio and stage tool that transforms unbalanced audio signals into balanced signals without any distortion. Its internal transformer offers an excellent dynamic range and outstanding overload stability.
The DI box is used as a connecting link to connect string instruments with pickups (for example, electric acoustic guitars, electric guitars, and electric basses), instruments with line outputs (for example, keyboards), and speaker outputs from guitar amplifiers to balanced inputs of a mixer or audio interface.
Safety Instructions
- Do not open the Palmer PAN 04 A Active Two-channel DI Box, and do not make any modifications to it.
- The device may be repaired only by authorized repair technicians.
- Make sure that the fuse used corresponds to the type printed on the device.
- Replace plug-in mains cables with original cables only.
- Use the Palmer PAN 04 A Active Two-channel DI Box in the prescribed manner only.
- Operate the device only with the accessories recommended and intended by the manufacturer.
- During installation, observe the safety regulations applicable in your country.
- Do not place any ignition sources, such as burning candles, near the device.
- Use the original packaging or packaging provided by the manufacturer for transport.
- Avoid shock or impact to the device.
- Devices can be continuously further developed.
- The device is not suitable for tropical climates and for operation at heights of 2,000 m above sea level.
- Unless explicitly stated, the device is not suitable for operation under marine conditions.
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
- 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 of the Palmer PAN 04 A Active Two-channel DI Box 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.
High Volume Audio Products
This Palmer PAN 04 A Active Two-channel DI Box 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 of this product may generate high sound pressure levels (SPLs) that may cause hearing damage. Avoid exposure to high volumes.
Portable Indoor Devices
- Temporary operation! Event equipment is generally designed for temporary use only.
- Continuous operation or permanent installation can impair the functioning of the device and cause premature aging.
Information on the User Manual
- 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
- The product has been developed for professional use in event technology, as well as in the studio, TV, and broadcasting.
- The product is not suitable for:
- Use by persons (including children) with limited physical, sensory, or mental abilities or a lack of experience and knowledge.
- Children (children must be instructed not to play with the device).
Packaging Content
Remove the Palmer PAN 04 A Active Two-channel DI Box 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 for the product includes.
- 1× inactive two-channel DI box
- Product data sheet
- Tour label
- Rubber feet
Connection & Operation
INPUT A / INPUT
- Audio input with 6.3 mm jack sockets.
- Connect an instrument using a shielded instrument cable.
- Connect the speaker output of a guitar amplifier using a speaker cable.
THRU A/THRU B
- The input signal is output unchanged via the 6.3 mm jack sockets (INPUT A -> THRU A / INPUT B -> THRU B).
PAD A/PAD B (passive attenuation device)
- Press the corresponding switch to reduce the output signal level by 30 dB.
- The output level must be lowered if the channel input stage of the connected mixer or audio interface is overdriven.
For users looking to add high-quality tube-driven tonal shaping to their setup, the Palmer PSUPSOAK Supreme Analog Dynamic Tube can be used alongside the DI box for enhanced sound quality and dynamic control.

DC 9–24 V
- Low-voltage socket for connecting an external mains adapter with 9 to 24 V DC voltage and a minimum of 100 mA (both polarity types possible; mains adapter optionally available).
LIFT / GND A – LIFT / GND B – LIFT / GND A+B
- Switch for disconnecting the ground connection between the corresponding channel’s input and output (ground lift).
- 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 A/OUTPUT B
- Balanced audio output with male three-pin XLR sockets. Use a balanced, shielded cable (for example, a microphone cable) to connect the DI box to a mixer’s or audio interface’s balanced output.
OUTPUT A+B
- Balanced audio output with male three-pin XLR socket. Channel A and B signals are mono-summed here. Use a balanced, shielded cable (for example, a microphone cable) to connect the DI box to a mixer’s or audio interface’s balanced output.

Connection Examples
Technical Data
- Product number PINN
- Product type DI box
- No. of channels 2
- Type Active
- Transformer isolated Yes
- No. of inputs 2
- Input type Unbalanced
- Input connectors 6.3 mm jack
- No. of outputs 2
- Output type Balanced
- Output connectors XLR
- THRU outputs per channel 1
- Input attenuation (PAD) 0 dB/30 dB
- Ground/lift switch Yes
- Additional functions, Additional mono output
- Operating voltage 2× P48 V, 9–24 V external power supply unit
- Power consumption 0.5 W
- Housing Aluminium continuous casting
- Dimensions (H/W/D) 140 × 50 × 128 mm
- Weight 0.72 kg
- Ambient temperature (for operation) – 20°C … 70°C
- Relative air humidity < 80% (non-condensing)
- Included accessories: Rubber feet, inscription label
Audio
- Max. input level (< 1% THD, 20 Hz) +11 dBu
- Max. input level (< 1% THD, 1 kHz) +11 dBu
- Max. output level (< 1% THD, 1 kHz) +5.5 dBu
- Frequency response (±1 dB, relative 1 kHz) 20 Hz–20 kHz
- Input impedance (1 kHz, setting: 0 dB PAD) 500 kΩ
- Output impedance (1 kHz, setting: 0 dB PAD) 110 Ω
- THD+N (30 Hz, +4 dBu, unity, unweighted) < 0.0028%
- THD+N (1 kHz, +4 dBu, unity, unweighted) < 0.0013%
- IMD (SMPTE) (60 Hz/7 kHz, 4:1, +4 dBu) < 0.0017%
- SNR (+4 dBu, 22 kHz BW, unity, unweighted) 108 dB
- Transformer ratio 1:3
Manufacturer’s Declarations
Herstellergarantie und Haftungsbeschränkung Manufacturer’s warranty & limitation of liability Adam Hall GmbH Adam-Hall-Str. 1 61627 Neu-Anspach, Germany.
CE Conformity
Adam Hall GmbH hereby confirms that this product, Palmer Pan16 19“ DI-bo,x meets the following guidelines (where applicable): Low-Voltage Directive (2014/35/EU), EMC Directive (2014/30/E/U), RoHS (2011/65/EU), RED (2014/53/EU)
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 Palmer Naab 2-Kanal Media DI-Bo,x this product, Palmer Pan16 19“ DI-bo,x 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 Palmer Pan16 19“ DI-box Hazardous Substances in Electrical and Electronic Equipment Regulation 2012 (SI 2012/),32,) Radio Equipment Regulations 2017 (SI 2016/2015), Adam Hall Ltd. | The Seedbed Bus. Centre | SS3 9QY Essex | UK
Customer Support
- Email: Info@adamhall.com
- Website: www.adamhall.com/compliance
- Ph: +49 (0)6081 / 9419-0
FAQs
Q: Does it have multiple channels?
Indeed, it has two different channels with independent ground-lift, input, and output controls. This makes it possible to utilise two instruments at once.
Q: What is the ground lift switch for?
When connecting to a mixing console or PA system, the ground lift switch aids in removing hum or ground loop noise. If you hear humming or buzzing in the signal, turn it on.
Q: Can it handle high-output active pickups?
Indeed. The active DI box is adaptable to various instruments and signal levels since it can handle both passive and active pickups.
Q: Can I use it with long cables?
Indeed. Unlike passive connections, active DI boxes preserve signal integrity and reduce noise, making them perfect for lengthy wire runs.
Q: Does it have a bypass feature?
There isn’t a specific bypass option, but you can feed a balanced signal to the mixer and route the raw signal to an amplifier using the parallel output.
Q: Can it be used with acoustic instruments with pickups?
Indeed. It produces a clear, balanced signal for live or studio applications when used with acoustic guitars, violins, or other instruments that use piezo pickups.
Q: What’s the frequency response?
The wide frequency response of the PAN 04 A, which usually ranges from 20 Hz to 20 kHz, guarantees precise instrument tone reproduction.






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