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Compact metal box with four headphone jacks and volume knobs

PHILIPS HA400 4-Channel Headphone Amplifier 12V

SKU CH-TBXC-N908G

A 4-channel stereo headphone amplifier powers up to four headphones from one source with independent volume controls, using a low-noise JRC4580 chip and 12V DC adapter

  • Impedance80 ohms
  • Connection3.5 mm
  • Wearing styleEarbud
  • Noise cancellationPassive
  • Product typeOn-Ear
  • Product colorWhite
  • Four-channel monitoring lets each listener set their own level
  • JRC4580 op-amp keeps noise low and fidelity high
  • Drives 32–100 Ω headphones up to 40 mA per channel
  • 12 V DC power feeds four independent 1/4" TRS outputs
  • Pocket-sized 4.07 × 1.18 × 2.24 in metal chassis fits any bag

Compact 4-Channel Headphone Amplifier

The PHILIPS HA400 is a 4-channel stereo headphone amplifier designed for studio recording, stage monitoring and shared listening sessions. It accepts a single audio source and splits it to four independent headphone outputs, each with its own volume control. Musicians, podcasters and small production teams can monitor the same mix simultaneously without signal loss.

Simple Desktop Setup with 12V Power

Connect the source to the 1/4" TRS input and plug up to four headphones into the 1/4" TRS outputs using the included DC 12V power adapter. The metal chassis measures 4.07 x 1.18 x 2.24 inches, so it sits securely on a desk or rack shelf. A common issue is using headphones below 32 ohms, which can overload the JRC4580 operational amplifiers and introduce distortion.

Optimised for 32–100 Ohm Headphones

The amplifier delivers a maximum output of approximately 40mA at 100 ohms and is tuned for headphones rated between 32 and 100 ohms with 50mm drivers. Lower-impedance models may draw excessive current, while higher-impedance pairs will not reach adequate volume. Buyers needing to drive more than four pairs or requiring balanced XLR connectivity should look elsewhere.

How it compares

Measured against everything we stock in Earbuds & Over-Ear Headphones, at today’s prices. Recalculated every night.

Price $33.99
Pricier than about 60% of the 7,078 comparable items (median $25.99).

Specifications

Product
Brand namePHILIPS
Model nameWFL900/H
Part numberHA400
Product typeOn-Ear
Product colorWhite
Audio & video
Impedance80 ohms
Wearing styleEarbud
Noise cancellationPassive
Ports & slots
Connection3.5 mm

Questions about this item

How can I verify the HA400 is working correctly after connecting my 32–100 Ohm headphones to the four 1/4" TRS outputs?

Plug a source into the 1/4" TRS input, power the unit with the 12 V adapter, connect up to four headphone pairs to the 1/4" TRS outputs, set each channel's volume knob, and confirm clear, distortion-free audio at the desired level on every pair.

What comes in the box and what must I supply separately for the HA400?

The package includes the HA400 amplifier and a DC 12 V power adapter; you must provide the audio source, 1/4" TRS cables for the input and each headphone connection, and the headphones themselves.

Which HA400 version should I choose for headphones rated at 50 mm drivers and 100 Ohm impedance?

The single HA400 model listed is designed for 32–100 Ohm headphones with 50 mm drivers and delivers up to 40 mA at 100 Ohm across its four channels, so it matches those specifications directly.

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