Phonitor One

The audiophile headphone amplifier

with innovative Phonitor Matrix and outstanding sound quality.
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Monitoring in highest sound quality.
Create perfect mixes on headphones – thanks to the Phonitor Matrix.

number one in sound

For us the sound is always in the foreground. When it sounds good, we like to listen. To get such a sound, you need experience and technical finesse. We have incorporated both into the Series One.

The design of the amplification stages

The preamplifier stage

Two Burr-Brown OPA 2134 SoundPlus™ operational amplifiers provide the pre-amplification. These are specially designed for audiophile circuits and are characterized by extremely low noise and minimal distortion of only 0.00008%.

Thanks to a true FET stage, the OPA 2134 achieves a slew rate of 20V/µs, making it a high-speed operational amplifier. This has an immediate positive effect on the liveliness of the playback.
In addition, low capacitance film capacitors are installed in the signal path as bypass capacitors of the coupling capacitors, which ensures a more precise transmission of the high-frequency signal components.
The excellent Panasonic ‘Electric Double Layer’ gold electrolytic capacitors are used as coupling capacitors. They offer the highest storage capacity of all capacitor technologies

 

The output stage

The output stage of the headphone amplifier 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.

“I’ve always been happy with my headphones and and my headphone amp attached to the audio interface, but since I’ve heard, tried and tested the combination of a high quality headphone amp with high quality headphones, I have to say there are worlds apart from what I’ve used before and what I was able to test here today.”

Muso Talk

The Revolution: Phonitor Matrix

The Phonitor Matrix is the revolution in the headphone amplifier.

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

With the Phonitor Matrix, you can create mixes on headphones that sound just like on speakers.

But the Phonitor Matrix is not only designed for professional use in the studio.
It also enables the hifi enthusiast to enjoy music on headphones, like if it was played back on speakers.

How is this possible?

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 spectrum.

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 crossing signals of the channels.
• Angle determines the opening angle of the stereo image.

The “Crossfeed” parameter of the Phonitor One is continuously adjustable via the crossfeed control.
The “Angle” parameter is fixed at the studio standard of 30°.

To perfect the listening experience, the level of the sound sources centered in the stereo image must be attenuated when the Phonitor Matrix is activated. The result is that not only the position of all sound sources is correctly located, but also their volume.

For the Phonitor One, this parameter, which we call “Center” for the Phonitor Matrix, is fixed at a -1 dB cut, which is the best choice for an authentic representation of the soundstage.

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. The hifi enthusiast can experience the music, like it was originally mixed and recorded.

So nothing stands in the way of a successful and long mixing session on headphones.

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Everything you need to know about the Phonitor Matrix
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Everything you need to hear about the Phonitor Matrix

“Due to its low noise and neutral amplification, the Phonitor One delivers a wonderfully equilibrated sonic experience with highly detailed resolution, dynamics and an intimacy rarely found in common devices. Beyond the crossfeed function, the Phonitor One behaves as one would expect from an amplifier: tonally neutral, without coloration, and quick to respond.”

KOPFHOERER.DE

Two line inputs

The Phonitor One offers two analog stereo inputs
(TRS and RCA).

Input devices with an analog output signal, such as CD players, mixers, synthesizers or an analog tape machine/tape deck, can be connected balanced (TRS jacks) or unbalanced (RCA) to the analog line inputs.

If a computer, tablet or smartphone is to be connected directly digitally, it is worth taking a look at the Phonitor One with USB input and state-of-the-art 32-bit DA converter.

Perfectly adjusted

At a regular listening volume, the volume control should be in the one o’clock position. This gives you an ideal control path for listening quieter and louder.

In order to obtain an optimal control range even with very powerful headphones, the output level of the headphone amplifier can be attenuated by activating the -10 dB DIP switch.

“Creating music in a studio should also be fun!

And SPL is capable of managing this exact balancing act with the Phonitor One.“

Amazona

Power Supply

Good sound always starts with the power supply. This is where you lay the foundation for the performance of the entire device. Although we “only” supply a 12 V plug-in power supply unit, the secondary power supply inside generates a voltage level of +/-17 Volts for the analog audio sections with which professional levels of up to +22.5 dB can be achieved!

An elaborate low-drop operating voltage regulation provides more “juice” and regulates cleanly even when the maximum operation voltage is reached.

The Phonitor One delivers full power when used with the included 1.5 A power supply.

Just switch it on and enjoy the great sound. The ON-switch puts the Phonitor One into operation.

Number One in Sound

With the Series One – just as with all other SPL devices – we develop not only according to plan, but also by ear from the very beginning.

Many important components are installed on the circuit boards using Through-hole technology. This way we can ensure that we can use the best sounding components.

Home is where the heart is

That’s why we manufacture all devices in our own production facility in Niederkrüchten on the Lower Rhine, Germany.

Videos

SPL Phonitor One d – Don't Mix On Headphones....Without This!
Phonitor One @ proaudio TV

Reviews

Amazona.de
Bonedo
Proaudio.de

Other Series One products

Manuals

Comparison Chart

Specifications

Analog inputs; 6.35 mm (1/4") TRS Jack (balanced), RCA

Input gain (max.)
+22.5 dBu
Input impedance Line In 2 (balanced)
20
Common mode rejection
< 60 dB
Input impedance Line In 1 (unbalanced)
47

Headphones Output; 6.35 mm (1/4") TRS Jack

Wiring
Tip = Left, Ring = Right, Sleeve = GND
Source impedance
20 Ω
Frequency range (-3 dB)
10 Hz - 200 kHz
Noise (A-weighted, 600 Ω)
-99 dBu
THD + N (0 dBu, 10 Hz – 22 kHz, 600 Ω)
0.002 %
THD + N (0 dBu, 10 Hz – 22 kHz, 32 Ω)
0.013 %
Max output power (600 Ω)
2 x 190 mW
Max output power (250 Ω)
2 x 330 mW
Max output power (47 Ω)
2 x 400 mW
Fade-out attenuation (600 Ω)
-99 dB
Crosstalk (1 kHz, 600 Ω)
-75 dB

Internal Power Supply

Operating voltage for analog audio
+/- 17 V
Operating voltage for headphone amplifier
+/- 19 V
Operating voltage for relays
+12 V

External Power Supply

AC/DC switching adaptor
Mean Well GE18/12-SC
DC plug
(+) pin 2.1mm; (-) outside ring 5.5mm
Input
100 - 240 V AC; 50 - 60 Hz; 0.7 A
Output
12 V DC; 1.5 A

Dimensions & Weight

W x H x D (width x height incl. feet x depth)
210 x 49.6 x 220 mm
8.23 x 1.95 x 8.66 inch
Unit weight
1.40 kg
3.09 lbs
Shipping weight (incl. packaging)
2 kg
4.4 lbs

Reference: 0 dBu = 0,775V. All specifications are subject to change without notice.

Calculation of VAT (value added tax)

All prices are displayed by default including the VAT of your country.

If your country cannot be determined via geolocation and you are not logged in as a user with the billing address of your country, the prices are displayed including the VAT of Germany (19%).

What does it actually mean …

In Stock!

The product is in stock in our warehouse in Niederkrüchten, Germany, and will be shipped the same or next working day.

We process the orders after receipt of the order and update the stock in the online shop regularly. If the product is no longer available at short notice due to high order volume, you naturally have the right to withdraw from the purchase (see Right of Withdrawal).

In any case, you will receive an e-mail with details of the delivery and the estimated delivery time.

Available soon!

The product is not in stock in our warehouse in Niederkrüchten, Germany. Usually it will be available again within 5 working days.

Due to the current pandemic and the associated worldwide shortage of components, delivery times may be significantly delayed in some cases.

In any case, you will receive an e-mail with the details of the delivery and the estimated delivery time.

Of course you have the right to withdraw from your purchase (see Right of Withdrawal).

Currently unavailable.

This product is currently sold out and unavailable.

Was bedeutet eigentlich …

Auf Lager!

Das Produkt ist in unserem Lager Niederkrüchten vorrätig und wird noch am selben oder nächsten Werktag versendet.

Wir arbeiten die Bestellungen nach Bestelleingang ab und aktualisieren den Bestand im Online-Shop regelmäßig. Falls das Produkt wegen hohem Bestellaufkommens kurzfristig nicht mehr verfügbar ist, hast du selbstverständlich das Recht, vom Kauf zurückzutreten (siehe Widerrufbelehrung).

In jeden Fall erhältst du eine E-Mail mit den Einzelheiten der Lieferung und der voraussichtlichen Lieferzeit.

Bald verfügbar!

Das Produkt ist in unserem Lager Niederkrüchten nicht vorrätig. Gewöhnlich ist es innerhalb von 5 Werktagen wieder verfügbar.

Aufgrund der aktuellen Pandemie und der damit verbundenen weltweiten Bauteileverknappung kann sich die Lieferzeit z.T. stark verzögern.

Auf jeden Fall erhältst du eine E-Mail mit den Einzelheiten der Lieferung und der voraussichtlichen Lieferzeit.

Selbstverständlich hast du das Recht, vom Kauf zurückzutreten (siehe Widerrufbelehrung).

Zur Zeit nicht verfügbar.

Dieses Produkt ist derzeit ausverkauft und nicht verfügbar.

Product Condition

A-Stock

Brand-new product from the current product portfolio.

B-Stock

Demo, exhibit or return item.
In original packaging, incl. manuals and full warranty.
Only slight to no signs of use.

C-Stock

Demo, exhibit or return item.
In original packaging, incl. manuals and legal warranty.
In some cases clear signs of use, which are documented in photos.

NOS

"New Old Stock"
After discontinuation of a product still available new products with full warranty.

Events

Due to Covid19 there are no events scheduled at this time.

Events

Aufgrund von Covid19 sind derzeit keine Events geplant.

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