headphone_amplifiers

ADL x1 ADL x1

ADL X1  |  Alpha Design Labs X1 24/192 USB DAC Headphone Amplifier

X1_description On-the-Go-Or-In-Your-Stereo

Headphone listening is an intimate sonic experience and most enthusiasts employ headphone amplifiers and a good pair of ‘phones– like the ADL H118! The headphone amplifier determines the quality of sound in hand with the headphones.

The X1 is small, discrete but highly specified with inputs supporting iOS digital at up to 16/48 via APPLE MFI certified USB Cable for iPod, iPhone, iPad devices. The X1 also runs 24/192 SPDIF with high-resolution files from PC via the PC’s USB output. There’s an analog line-level 4-pin 3.5mm input and a 4-pin 3.5mm output for headphones in the 12~600 ohm range. The 4-pin input supports 3.5mm Remote and Mic Earphones. The 3.5mm TOSLINK optical output delivers USB source signal up to 24/192. There’s a convenient GND TRRS switch making it easy to change from one 4-pin set of ‘phones to another.

Product Specifications
  • High-quality volume control and On/Off switch (front)
  • Gold-plated 3.5mm input connector: Analog line input (switched)
  • Gold-plated 3.5mm output connector-1: Headphone or Analog out
  • Gold-plated 3.5mm output connector-2: Headphone / Analog out or 3.5mm optical output for 24/192 (MAX) SPDIF 
  • 4-layer gold-plated printed circuit board  with >1oz copper thickness
  • Gold-plated USB A socket for 16/48  iDevices (iPod/iPhone/iPad)
  • Gold-plated USB mini-B connector for 24/192 PC operation
  • Recharges via PC USB connection or AC/DC switching power adapter  (sold separately)
  • Attractive aluminum cover and ABS plastic body
  • Max headphone output at 1%THD @ 1KHz: 34mW(12 ohm), 60mW(16 ohm), 82mW(32 ohm), 86mW(56 ohm), 36mW(300 ohm), 19mW(600 ohm)
  • Channel separation 60~64dB (1KHz) 33ohms -50dB/<=±3dB
  • Frequency characteristics 20Hz~20kHz (±0.5dB)
  • Total Harmonic Distortion 0.033% (33ohms) , <0.02% (300ohms) , 0.0085% (600ohms)/1mW
  • S/N Ratio 95.5dB/32ohms , 98.1dB/56ohms , 101.6dB/300ohms, 102.1dB/600ohms
  • Charge time approximately  4~5 hours (AC/DC 5V, 1.0-2.0A switching adaptor – sold separately)
  • Charge time: approximately  7 hours (DC 5V  0.5A USB bus power)
  • Music playback time up to 7.5 hours when fully charged
  • Dimensions 68 (W) x 118 (D) x 16.5 (H) mm
  • Weight: 147g Approx.


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technical-specifications
  • 24-bit/192kHz  XMOS High-Performance  Streaming Controller supports ASIO and Asynchronous mode
  • USB 2.0 High Speed (480Mbit/s) compliant  supporting 8/16/32/44.1/48/88.2/96/176.4/192 kHz sampling rates
  • High-performance ESS-ES9023 24-bit/192kHz DAC chip
  • Maxim MAX9724C Power IC ,  Low-RF Direct-Drive Stereo Headphone Amplifier with 1.8V compatible shutdown
  • TI- LMV832 Dual 3.3 MHz EMI-Hardened Low-Power CMOS OP AMP
  • Power Supply 1: DC 5V  500mA ~ 2000mA     
  • Power Supply 2: DC 3.7V 2600 mAh Li-ion rechargeable battery


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ADL X1 compatible devices
  • i Phone5 (lightning cable), i Phone4S, i Phone4, i Phone3GS
  • i Pod touch 5th Gen (lightning cable), i Pod touch 4th Gen, i Pod touch 3rd Gen,
  • i Pod nano 7th Gen (lightning cable), i Pod nano 6th Gen, i Pod nano 5th Gen
  • i Pod classic 160G(2009)
  • i Pad mini, i Pad 2, i Pad 3rd Gen
Connectivity
  • USB mini-B socket for USB A output from PCs and charging battery
  • USB A socket for iDevice output via APPLE MFI-certified USB cable
  • Headphone and Analog out-1 (front) (4-pin) 3.5mm connector for headphones and analog output
  • Headphone and  Analog out-2 (rear) (3-pin) combined 3.5mm connector for headphones
  • Line input (4-pin): 3.5mm phone jack for analog input (switched)
  • Mini-optical connector output

features
  • High-performance 24-bit/192kHz XMOS USB and ESS-ES9023 DAC chip
  •  Digital Inputs For iOS , PCs • Superb Sound!
  •  DD Converter (3.5mm TOSLINK optical output)
  •  Supports ASIO and Asynchronous mode
  •  Goes Anywhere , Stacks Easily
  •  Elegant Appearance
  •  Low Jitter
  • Stacks easily
  • Fits in the palm of your hand
  • Enjoy music anywhere
  • Beautifully-finished aluminum and ABS plastic casing
  • Doesn’t draw power from connected iDevice’s battery
  • Headphone and output can connect to home stereo system
  • Line input improves sound of portable analog audio sources
    Front Controls and Indicators:
  1. Headphone and Analog out -1 (4-pin): 3.5mm connector for headphones and analog output
  2. Line input (4-pin): 3.5mm phone jack switched
  3. Volume: Rotary-type variable resistor with power on/off
  4. Charging Indicators: Three colors: RED , GREEN and ORANGE LED
    RED indicates charging/GREEN indicates full charge/ORANGE indicates low charge
  5. GND TRRS Switch: Switchable to match different 4-pin headphone types (SONY or APPLE)
  6. adl_x1
    Rear Panel:
  1. USB A socket : For APPLE MFI Certification USB Cable via iDevice for music
  2. USB Mini-B socket: For USB  Cable via PC for music and to charge battery
    (Internal DC3.7V 2600mAh Li-ion Type Rechargeable Battery)
  3. Headphone and Analog out -2 (3-pin) : Combined 3.5mm phone jack  and mini optical output jack
    x1-buttom
    Top Panel LED Indicator:
  1. SB DAC (digital source - MAC or PC USB connection): sampling rates will indicate according to the computers sample rate settings (44.1/ 48/ 88.2/ 96/ 176.4/ 192kH)
  2. USB DAC (analog source – 3.5mm Line in jack connection): sampling rates will indicate at 48kHz
  3. iDevice digital connection: sampling rates will indicate (LED flashing) at 44.1kHz (not 48kHz) when connected with Apple MFi approved USB cable
  4. iDevice analog connection: sampling rates will indicate (LED on) at 44.1kHz
  5. Playback of computer based files using iTunes on either Mac or PC: sampling rates will indicate according to the computers
    sample rate settings (44.1/ 48/ 88.2/ 96/ 176.4/ 192kH)
    *  Playback of computer based files using iTunes with Windows XP: sample rates cannot be set, so the X1 will indicate at 44.1kHz
    Bottom Panel:
  1. Input Selection: Switchable between USB A socket or USB Mini-B socket
    (USB-A socket for iOS or USB miniB socket for PCs)
    (Switch must be reset after each selection, simply switch the ADL X1 on and off)


Video


REVIEWS

ADL X1 Q & A

Q1. Device/Computer does not recognize the X1

A1-1. Not connected correctly
(Refer to the X1 manual (Connectivity P.23) and check whether the X1 is connected correctly to portable player/idevice via 3.5mm analog or USB-A inputs or whether the X1 is connected correctly to the computer via USB cable)
A1-2. There is a problem with the cable.
(There may be a problem with the connected idevice cable, 3.5mm analog cable or USB cable. Please try with another cable)
A1-3. Media Player is not recognized by the X1
(Refer to the X1 manual (Connectivity P.23) and reconnect the X1. If previously you had been using the X1 as a USB DAC, please try removing the cables and switching the X1 off and back on again.
A1-4. USB device is not recognized by the X1
(Remove the USB cable, wait 10 seconds and reconnect. If the device system is unstable, please try restarting the device. Then refer to the X1 connectivity on P23 of the user manual and reconnect the X1)
A1-5. Computer does not recognize the X1
(In the case of Windows installation of a driver is necessary. If difficulties are experienced with the driver installed, please uninstall the driver and reinstall one more time)
A1-6. Battery needs recharging
(Check whether the light next to the volume knob is on – Green: battery is charged – Red: battery needs charging – No light: battery needs charging)

Q2.No sound

A2-1. No sound from computer source via USB cable
(Set the sound output on the computer sound application to maximum. Windows XP: make sure the mute is unchecked in the sound application)
A2-2. Low volume level on digital player
(Check the volume level on your digital player/idevice: set to maximum and adjust volume on the X1)
A2-3. Another device is set as the default playback device
(Open the computer’s Sound and Audio Device properties tab and select USB Audio Device ADL X1 as default playback device)
A2-4. Problem with the connections
(Check all cables are correctly inserted into sockets)

Q3. There is no sound from computer speakers or computer headphone output

A3-1. USB audio device is set as default
(There will be no sound from computer speakers or computer headphone output while a USB audio device is set as default)

Q4. No sound from headphones

A4-1. X1 volume level is too low
(Adjust the volume with the X1 volume knob on the top panel)
A4-2. Digital player / idevice volume level is too low
(Set volume to maximum on the digital player / idevice and adjust the volume on the X1)
A4-3. Headphones or earphones have a MIC or Volume control on their cable
(With such headphones the 4 ringed 3.5mm connector cable supplied with the X1 must be used. Connect player to the analog in socket on the top panel of X1 with the supplied cable: GND TRRS switch should be set to 1 for SONY products and set to 2 for APPLE products)

Q5. Unbalanced sound balance during playback

A5-1. Check balance setting on in computer audio application
(Open the volume control tab on the computer and set the balance to neutral – centered)

Q6. Sound cuts out

A6-1. During playback there is a possibility of an overload of the computer / idevice / digital player’s CPU
(During playback of music make sure all other computer applications are closed and limit use of other applications on idevices / iPod / digital players)

Q7. Experiencing noise

A7-1. Connections are not secure
         (Check all terminals for correct secure connection)
A7-2. Trying adjusting the volume control of digital players or idevices
(Lower the X1 volume and adjust the volume on digital players or idevices to the maximum and then gradually increase the volume on the X1)

Q8. Is it possible to connect the X1 directly to an external stereo system?

A8-1. A 3.5mm mini TOSLINK (Optical) cable or 3.5mm stereo connector to stereo RCA cable is required (Sold separately)
(For digital output: connect 3.5mm mini TOSLINK (Optical) cable to the X1’s optical output socket)
(For analog output: connect 3.5mm stereo connector to stereo RCA cable to the X1’s analog output socket)

Q9. Is a driver required?

A9-1. A driver is required to be installed on Windows computers
(Download driver from the X1 product page on www.adl-av.com – Please note decompression software for .rar files is required)

Q10. Difficulties experienced trying to recharge the X1’s internal battery

A10-1. Unable to recharge; no charging light can be seen
(Try another USB cable)

Q11. Is it possible to use the X1 as a DDC between a computer and another DAC

A11-1. Connect the X1 to the computer via USB cable and by 3.5mm mini TOSLINK (Optical) cable to the external DAC

Q12. Is it possible to use the X1 as a DDC between an idevice and another DAC

A12-1. This is not possible

Q13. Is the signal from an idevice converted to 16bit/48kHz?

A13-1. The signal from the idevice is not converted to 16bit/48kHz. It will be played at its original bit and sampling rate. 16bit/48kHz is the maximum for idevice playback.

Q14. Are 3rd generation iPods compatible with the X1

A14-1. Unfortunately not. Compatible devices are listed below:
i Phone5 (lightning cable), i Phone4S, i Phone4, i Phone3GS
i Pod touch 5th Gen (lightning cable), i Pod touch 4th Gen, i Pod touch 3rd Gen,
i Pod nano 7th Gen (lightning cable), i Pod nano 6th Gen, i Pod nano 5th Gen
i Pod classic 160G(2009)
i Pad mini, i Pad 2, i Pad 3rd Gen

Q15. Is the X1 compatible with Smartphones (Android OS)?

A15-1. Compatibility cannot be guaranteed 

Q16. Is it possible to use the X1 while charging the battery via USB cable? (Not possible with Sony PHA-1)

A16-1. Yes, possible.

Q17. Is it possible to take a phone call when using a headphone cable with a MIC?

A17-1. Yes, possible if the phone is connected to the X1 via the analog input.
(With such headphones the 4 ringed 3.5mm connector cable supplied with the X1 must be used. Connect player to the analog in socket on the top panel of X1 with the supplied cable: GND TRRS switch should be set to 1 for SONY products and set to 2 for APPLE products)

Q18. Is it possible to take a phone call on an iphone when connected to the X1 via digital cable?

A18-1. No, not possible. The iphone must be connected to the X1 via the analog input to take phone calls.
(With such headphones the 4 ringed 3.5mm connector cable supplied with the X1 must be used. Connect player to the analog in socket on the top panel of X1 with the supplied cable: GND TRRS switch should be set to 1 for SONY products and set to 2 for APPLE products)

Q19. During playback with an idevice connected to the X1 via digital cable the indicator on the top panel is flashing.

A19-1. The flashing LED indicates that the X1 is receiving digital signal (the indicator would be constantly on with analog signal)

Q20. During playback with an idevice connected to the X1 via digital cable the idevice volume can be adjusted. Does this mean it is analog signal?

A20-1. No, for your convenience the idevice volume control will be enabled during digital playback. If the indicator is flashing on the top panel then it is digital signal.

Q21. During playback with an idevice connected to the X1 how should I adjust the volume?

A21-1. We suggest lowering the volume on the X1 and the setting the volume on digital players or idevices to the maximum and then gradually increasing the volume on the X1

Q22. After playback with an idevice the X1 is connected to a computer, but the computer does not recognize the X1

A22-1. Be sure to switch the selector switch on the back panel to USB DAC when connected to a computer. The X1 should also be switched on and off to reset before connecting to the computer.

Q23. How do you get the ASIO driver to be recognized by the computer?

A23-1. That will be a computer setting. First download the ASIO driver

Q24. I am using a MAC, shouldn’t it be ASIO compatible?

A24-1. MAC OS X supports Core Audio sound engine, so ASIO is not necessary.

Q25. Are any special setting required for Asynchronous signal transfer?

A25-1. X1 signal transfer via USB is Asynchronous. No special settings are required.

Q26. In the user manual and instructions it says to use a MFi certified USB docking or lightning cable. Is it not possible to use an uncertified cable?

A26-1. It may be possible, but we cannot guarantee results.

Q27. Not able to install driver on Windows 8 OS computer

A27-1. Uninstall the X1 driver and download the most recent driver from the X1 product webpage:
http://www.adl-av.com/products/headphone_amplifiers/x1/

Q28. When using a headphone cable with a remote control it is possible to hear music, but not possible to use the remote

A28-1. Even when using a SONY or APPLE MIC/Remote headphone cable, it may not be possible to use the remote with some players (devices)
(With such headphones the 4 ringed 3.5mm connector cable supplied with the X1 must be used. Connect player to the analog in socket on the top panel of X1 with the supplied cable: GND TRRS switch should be set to 1 for SONY products and set to 2 for APPLE products)

Q29. Not able to use Denon or Beats MIC/remote headphone cables with the X1

A29-1. The X1 is compatible with only SONY or APPLE MIC/Remote headphone cables
(With such headphones the 4 ringed 3.5mm connector cable supplied with the X1 must be used. Connect player to the analog in socket on the top panel of X1 with the supplied cable: GND TRRS switch should be set to 1 for SONY products and set to 2 for APPLE products)

Q30. Experiencing intermittent noise

A30-1. Some Smartphones are not compatible with MIC/remote headphone cables. Try the MIC/remote headphone cable directly with the Smartphone before connecting to the X1 to see if the MIC/remote headphone cable is compatible with the Smartphone.
(With such headphones the 4 ringed 3.5mm connector cable supplied with the X1 must be used. Connect player to the analog in socket on the top panel of X1 with the supplied cable: GND TRRS switch should be set to 1 for SONY products and set to 2 for APPLE products)

Q31. When using the X1 with a Smartphone and a MIC/remote headphone cable, sound can be heard from the Smartphone’s internal speakers

A31-1. After long periods of use iPods can produce intermittent digital noise. Try switching the iPod/iPhone off and on again a few times.

Q32. The latest iPod Classic is not recognized by the X1

A32-1. Please update your iPod (or any iDevice) to iOS 6.1.3 version or later. After updating the iDevice iOS the iDevice volume setting should automatically be set to maximum when connected to the X1.

Q33. The X1 charging light is flashing red

A33-1. The safety timer has been activated. If the internal battery is not fully charged within 8.5 hours the indicator will flash red. If this is the case, disconnect the USB cable from the X1 and check the specifications for USB BUS POWER and switching adaptors.
*Note: Fast-Charge Safety Timer
The X1 contains an internal safety timer for the fast-charge phases to prevent potential damage to the battery and the unit.

 

The LED battery charge indicator will flash red if the timer is activated. This will occur during recharging if the battery is not fully charged within 8.5 hours.
In this case the USB cable should be disconnected from the X1 and requirements for USB BUS POWER or Switching adaptor (sold separately) should be reviewed. There is a possibility that one or more conditions for recharging are not being met.
Switching adaptor: AC/DC 5V, 1.0~2.0A
USB BUS POWER: DC 5V 0.5A

 

Other possible reasons recharge failure:

 

  1. 1.Switching adaptor lacks current or is faulty
  2. 2.USB BUS POWER lacks current or voltage or the cable or USB interface is faulty
  3. 3.Damage or abnormality with internal Battery Charger and Power-Path Management IC
  4. 4.Damage or abnormality with internal lithium battery