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SPL HPm - 500 series Headphone Monitoring Amplifier — image 1

SPL

SPL HPm - 500 series Headphone Monitoring Amplifier

Get your phonitor matrix from the Take-Out menu with this 500 series headphone amp!

Retail: ~~$488.00~~ $439.00 or about $18/mo with Affirm Prequalify →

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Watch & listen

This is how the SPL Phonitor Matrix sounds

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Check out this video to get a quick explanation what the SPL Phonitor Matrix is all about.

SPL Phonitor Matrix explained

Also in this recording SPL 2Control Speaker & Headphone Monitoring Controller SPL Phonitor 2 Headphone Amplifier SPL Phonitor xe (Black) w/ DAC Option SPL Phonitor xe (Red) w/ DAC Option SPL Phonitor xe (Silver) w/ DAC Option SPL Control One Monitor Controller SPL Marc One Monitoring and Recording Controller

This video explains the SPL Phonitor Matrix.

From SPL

500 Series double-slot module headphone monitoring amplifier with Phonitor Matrix for two
headphones.

The headphone output stage

The HPm delivers full headphone sound – twice!
The output stage of the headphone amplifiers is designed as a push-pull amplifier in Class AB mode. The bipolar transistors share the amplification of the positive and negative half-waves, which produces a higher gain and a higher output voltage than in Class A operation, where only one transistor amplifies both half-waves.The output stage transistors are thermally coupled and thus run particularly coherently, which contributes to a consistent and stable sound image. The power supply has a buffer circuit with low source resistance, ensuring generous current reserves even when operating low-impedance headphones. Both headphone amplifiers provide an individual volume control.

Stereo/Mono/Mute

The audio signal can be switched between stereo and mono. In the Mute position, the headphone
outputs are muted.

Phase Inverse Ø

With the phase inversion switch the phase the of the left or right channel can be inverted (180°).

Tip: M/S – Mid or Side?

By using the MONO and the phase invert switch in combination, it is possible to only monitor the
M or S signal. When “Mono mode” and phase inversion is active, only the S signal is played back.

If the phase inversion is switched off, the Mono signal corresponding to the M signal is played back. Separate monitoring of the M and S signals has become a standard for many mixing and mastering engineers.

The revolution in the headphone amplifier: Phonitor Matrix

The Phonitor Matrix enables mixing and mastering engineers to create perfect mixes on headphones, which will translate perfectly to all types of stereo speaker systems.

Wie ist das möglich?

Music is normally produced and mixed for playback on stereo speakers.Listening on headphones is different from listening on loudspeakers. The biggest difference is the lack of crossing signals of the sound signal from the left speaker to the right ear and from the right speaker to the left ear. These crossing signals are missing in conventional headphone listening, because there are no signals crossing from one side of the headphones to the other. This results in an unnaturally wide stereo stage and sound sources are not played back at their correct position in the stereo field.The SPL Phonitor Matrix can correct this false stereo image with an analog circuitry.

The Phonitor Matrix parameters

The two main parameters of the Phonitor Matrix are Crossfeed and Angle:

• Crossfeed determines the opening angle of the stereo image.
• Angle determines the opening angle of the stereo image.

Speaker Angle

The “Angle” parameter can be adjusted in three settings: 20°, 30° and 40°. The studio standard is 30°.

To make the listening experience even more perfect, the level of the center of the stereo image needs to be attenuated when the Phonitor Matrix is active. This ensures that not only the position of all sound sources is correct but also their volume. With HPm, this parameter, which we call “Center” in the Phonitor Matrix, can also be adjusted in three settings. You can choose between an attenuation of -0.5dB, -1 dB or -1.5 dB. The standard for an authentic representation of the stereo image is -1 dB. During conventional listening on headphones, our brain can compensate a certain level of false playback representation – but this is very exhausting and leads to listening fatigue.

Summed up

The SPL Phonitor Matrix corrects the false representation of the stereo sound image, which makes it much easier to find the right decisions for mixing and mastering engineers. So nothing stands in the way of a successful and long mixing session on headphones.

Phonitor Matrix

With the Matrix switch, the Phonitor Matrix (Crossfeed, Speaker Angle, Center Level) can be activated or deactivated.

Crossfeed

The “Crossfeed” parameter of the HPm is continuously adjustable via the crossfeed control.

Input

Electronically balanced

Impedance: 10kOhm
Max. Input level: +21 dBu

Output

Max. output level

+18 dBu @ 600 Ohm

+15 dBu @ 300 Ohm

+5 dBu @ 32 Ohm

Frequency Range: 10Hz -100kHz
Noise: -92,3 dBu (A-weighted)
THD: 0,00024% (at 0 dBu output level, 600Ohms)
Housing: Dual-Slot 500 series rack module
Weight: 0,8 kg /1.76 lbs

0dBu = 0,775V. Specifications subject to change without notice.

Free 3-Year Warranty

Sound Pure stands behind our products. Free three-year warranty on this item. Coverage exclusions live in Terms & Conditions, Section 27.

Level of support and expertise that simply isn't available at big-box megastores. Read the warranty →

Returns

Not eligible for Try Before You Buy or the 48-hour approval period. Standard return policy applies — see Terms & Conditions, Section 18 for details.

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