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SPL Phonitor One d Headphone Amplifier with 32-bit DA Converter
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The Audiophile Headphone Amplifier with innovative Phonitor Matrix, 32-bit DA-converter and outstanding sound quality
• Enjoy your music from two analog line sources
• Connect two analog stereo sources - balanced (TRS) and unbalanced (RCA)
• Listen to a digital source via class compliant USB - from your computer or mobile device
• The 32-Bit Velvet Sound™ DA Converter plays back up to 768kHz and DSD4
• Perfect and precise control with the Analog Volume Controller
• SPL's famous Phonitor Matrix; mixing on headphones sounds like mixing on speakers
• Line Out turns the Phonitor One d into a state-of-the-art DAC
• Aluminum front panel and metal housing
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/s, 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
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 d, the center level is preset to -1 dB and the speaker angle to 30 degrees. 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.
Three Stereo Inputs
Two analog stereo inputs 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 output unchanged at the line out. This allows Phonitor One d to be looped between devices without "losing" an output connection. If, for example, several people are to listen in 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. Phonitor One d comes with a 12 V plug-in power supply unit, while 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 d 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 d into operation.
Specifications
Analog inputs and outputs; 6.35 mm (1/4") TRS Jack, 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 Line Out (balanced): 150 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 and LEDs: +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 W x H x D (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 lbs
• Enjoy your music from two analog line sources
• Connect two analog stereo sources - balanced (TRS) and unbalanced (RCA)
• Listen to a digital source via class compliant USB - from your computer or mobile device
• The 32-Bit Velvet Sound™ DA Converter plays back up to 768kHz and DSD4
• Perfect and precise control with the Analog Volume Controller
• SPL's famous Phonitor Matrix; mixing on headphones sounds like mixing on speakers
• Line Out turns the Phonitor One d into a state-of-the-art DAC
• Aluminum front panel and metal housing
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/s, 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
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 d, the center level is preset to -1 dB and the speaker angle to 30 degrees. 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.
Three Stereo Inputs
Two analog stereo inputs 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 output unchanged at the line out. This allows Phonitor One d to be looped between devices without "losing" an output connection. If, for example, several people are to listen in 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. Phonitor One d comes with a 12 V plug-in power supply unit, while 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 d 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 d into operation.
Specifications
Analog inputs and outputs; 6.35 mm (1/4") TRS Jack, 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 Line Out (balanced): 150 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 and LEDs: +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 W x H x D (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 lbs
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Protect your investment with the Long & McQuade Performance Warranty
A warranty can be a very important factor when making a buying decision. Because repairs can be very expensive in terms of parts and labour costs, manufacturers usually only provide one year limited warranties that generally only cover items that malfunction due to a manufacturer’s defect. With an important purchase such as a musical
instrument or piece of studio gear, however, many people want to have the peace of mind in knowing that their investment will be protected should the product no longer be performing at 100%.
Because of this, Long & McQuade provides our customers with a FREE one-year Performance Warranty on most of our products. The Long & McQuade Performance Warranty supplements the manufacturer’s warranty to ensure that our customers receive complete “no hassle” warranty coverage within their first year.
How does the Long & McQuade Performance Warranty differ from most manufacturers' warranties?
- Performance Guarantee: Normal wear and tear is covered, so your product will be performing as well as the day you purchased it for the entire duration of the coverage. Band and Orchestral Performance Warranty does not include replacing pads or cleaning for woodwind instruments, unless deemed necessary by our repair staff. Ultrasonic cleaning for brass instruments will be provided if deemed necessary by our repair staff, but is not routinely offered under the Performance Warranty.
- Product Replacement: If your product cannot be fixed or costs too much to fix, we will replace it with the equivalent model for no additional charge. If this is not possible, a full refund will be provided.
- No Lemon Policy: Your product will be replaced should the same problem occur multiple times.
- Convenient: Easy drop off and pick up of the product at any Long & McQuade location.
- Guitar Setup: Guitars purchased at Long & McQuade come with 1 free setup, to be redeemed within 1 year for new guitars and 90 days for used guitars.
- Loaners Available: A loaner product may be given while the product is being repaired.
- Power Surge Protection: Your product is covered even if damaged from a power surge.
- Accessory Coverage: Any peripheral devices or accessories that come with your product (i.e. foot pedal, case) are also covered.
- Commercial Use Coverage: Music and recording professionals who purchase gear for “heavy-use” commercial purposes will still be covered.
Long & McQuade reserves the right to restrict the purchase of additional years of Performance Warranty. Used products come with a 3-month Long & McQuade Performance Warranty. Some products (i.e. computers, software, cymbals and other items) are covered only by the manufacturer‘s warranty. Consumables (i.e. strings, reeds, drum sticks, batteries, tubes, cross faders) are excluded as they are designed to be replaced. Cosmetic Damage, Accidental Damage, or problems caused by Humidity or Temperature Issues are not covered. Speakers damaged by overpowering are generally not covered. Our coverage does not provide compensation for loss of use. As of June 2018 the Performance Warranty is no longer transferable. The warranty is only valid in Canada.
Purchasing additional years of coverage
Some manufacturers provide warranties for longer than 1 year; however, these are usually limited warranties that do not provide the same coverage as the Long & McQuade Performance Warranty. Customers interested in more complete and convenient (but not necessarily longer) coverage are still able to purchase additional years of the Performance Warranty.
If you are interested in receiving this coverage for longer than one year, you have the option of purchasing additional years of the Performance Warranty. The pricing is as follows:
- NEW products: Starting at 4% of the current new selling price to double the warranty from 1 year to 2 years. Starting at 4% for each additional year.
- USED products: Starting at 4% of the current new selling price to increase the warranty from 3 months to 1 year. Starting at 4% for each additional year.
- GUITARS: 4% of the current new selling price to double the warranty from 1 year to 2 years. 4% for each additional year. $45 maximum. An additional free setup is not included with additional purchased years of Performance Warranty.
- BAND and ORCHESTRAL instruments: 4% of the current new selling price to double the warranty from 1 year to 2 years. 4% for each additional year.
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| Product | SKU | Qty |
|---|---|---|
| Phonitor One d Headphone Amplifier with 32-bit DA Converter | 740146 |
