Description
Phonitor One d
The Audiophile Headphone Amplifier with innovative Phonitor Matrix, 32-bit DA-converter 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 SoundPlusTM 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.
The Power Amplifier
The output stage of the headphone amplifier is designed as a push-pull amplifier in class AB mode.
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
The revolution in the headphone amplifier is the Phonitor Matrix – mixes made on headphones sound as they were mixed on speakers.
The Phonitor Matrix in its largest expansion stage has three setting parameters: Crossfeed, Speaker Angle and Center Level.
In the Phonitor One d, 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.
When the Crossfeed control is in the OFF-position the Phonitor Matrix is switched off – it is removed out off the audio signal path via relay (hysteresis circuit).
Three Stereo Inputs
Two analog stereo sources and one digital source can be connected to Phonitor One d. The computer, tablet or phone are preferably connected via USB.
Other players such as a 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).
32-Bit DA-Converter
The converter chip used is the Premium AK4490, a new generation of premium 32-bit DACs equipped with AKM’s Velvet Sound®. This technology makes the finest details audible thanks to its low-distortion architecture.
It supports sampling frequencies up to 768kHz PCM (16x CD resolution) and DSD (Direct Stream Digital) playback up to DSD4 or DSD256 (11.2 MHz) resolution.
This qualifies the Phonitor One d for the currently highest resolution audio playback.
The USB connection is Class Compliant. This means that all Mac computers and iOS devices like iPads and iPhones can use the full performance bandwidth of the DA-converter without driver installation.
iOS devices require the camera adapter. For Windows a driver is required.
Line Out
The selected input signal is direclty routed to the line out. This allows Phonitor One d to be looped between devices without “losing” an output connection.
If, for example, several people are listening via headphones, a headphone amplifier can simply be connected to the Line Out.
But you can also record the signal analog or send it to a mixer for further processing.
Thus, the Phonitor One d can also be used as a state-of-the-art DA-converter, which recommends it for a series of other tasks.
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.
Specifications
Analog inputs & outputs; 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
- Output gain (max.) +22 dBu
- Output impedance Speaker Out (balanced) 150 Ω
- Output impedance Line Out (unbalanced) 75 Ω
- Frequency range (-3dB) 10 Hz - 200 kHz
- Noise (A-weighted, 0 dBu, 600 Ω load) - 99 dB
- THD + N (0 dBu, 10 Hz – 22 kHz, 600 Ω) 0.002 %
- THD + N (0 dBu, 10 Hz – 22 kHz, 32 Ω) 0.013 %
- Crosstalk (1 kHz) < 75 dB
- Dynamic range 121.5 dB
USB, 32-Bit AD/DA
- USB (B), PCM sample rates 44.1/48/88.2/96/176.4/192/352.8/384/705.6/768 kHz kHz
- USB (B), DSD over PCM (DoP), sample rates 2.8 (DSD64), 5.6 (DSD128), 11.2 (DSD256) MHz MHz
- 0 dBFS calibrated to 15 dBu
- Noise (A-weighted, 44.1/48 kHz sample rate) -113 dBFS
- THD + N (-1 dBFS, 10 Hz – 22 kHz) 0.0012 %
- Dynamic range (44,1/48 kHz sample rate) 113 dBFS
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
- Operating voltage for digital audio +3.3 V, +5 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 1,45 kg / 3,2 lb
- Shipping weight (incl. packaging) 2 kg / 4,4 lb
