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SPL Phonitor One Headphone Amplifier (Black)

$555.00

Free Lifetime Technical Assistance
SKU: Phonitor One Black
Brand: SPL

Description

Phonitor One

The Audiophile Headphone Amplifier

with innovative Phonitor Matrix and outstanding sound
quality.

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 Power Amplifier

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.

The Revolution

in the headphone amplifier is the Phonitor Matrix,
with adjustable crossfeed, thanks to which you can create mixes with headphones
that sound the same on speakers.

The Phonitor Matrix in its largest expansion stage has three
setting parameters: Crossfeed, Speaker Angle and Center Level. 

In the Phonitor One, the center level is preset to -1 dB and
the speaker angle to 30°. These are the most commonly used values.

The crossfeed function determines the crosstalk of the
channels, the so-called interaural level difference. The intensity of the
crossfeed is fully variable. 

At the beginning of the control path the function is not in
the audio path. It is only switched on by adding it via relay (hysteresis
circuit). The audio signal therefore does not pass through the crossfeed stage
if this is not desired

Two Line Inputs

Two analog stereo inputs can be connected to Phonitor
One. 

Sources such as a DA-converter, CD-player, mixer,
synthesizer or an analog tape machine/tape deck can be connected to the analog
line inputs either balanced (TRS jacks) or unbalanced (RCA).

If you want to connect your computer, tablet or phone
directly, check out Phonitor One d with USB input and a state-of-the-art 32-bit
DA-converter.

The 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. Only use the 12 V plug-in power supply
unit within the scope of delivery. The ON-switch puts the Phonitor
One into operation.

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 kΩ
Common mode rejection
< 60 dB
Input impedance Line In 1 (unbalanced)
47 kΩ
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)
-97 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.

Additional information

Weight 0.00000000 lbs

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