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Summary of Contents for Practical Devices XM6
- Page 1 PRACTICAL DEVICES CORPORATION Headphone Amplifier User’s Manual...
- Page 2 We’ve worked very hard to provide you with what may be one of the most advanced, feature packed, and best sounding headphone amplifiers on the market today. The XM6 is designed to be durable, flexible, easy to use, practical, and above all, sound great. Each unit is carefully manufactured, and then rigorously tested for performance, durability, and sound quality.
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Page 3: Table Of Contents
Table of Contents XM6 Block Diagram ....... 4 Connecting Your XM6 ......6 USB ............7 Power Button Functions ......8 Crossfeed Controls ......... 9 Bass, Treble, Gain Boost ...... 10 75 output, Voltmeter ......11 Joystick ..........12 Auxiliary Connector ....... 13 Disassembling the Unit ...... -
Page 4: Xm6 Block Diagram
XM6 Block Diagram Switch Gain Boost Switch IN position: 75 output impedance IN position: +8db extra boost OUT position: 0 output impedance OUT position: +0db extra boost Treble +2.5dB Crossfeed Enable Switch Power Button IN position: XFeed enabled. Press button:... -
Page 5: Interior View
The joystick works in USB mode only. You may have to configure your OS and/or media player for full functionality. Power Connector USB Connector: Used to power and recharge the XM6. Mates with Mini-USB only the AC adapter supplied from Practical type B 5-pin plug. Devices. -
Page 6: Connecting Your Xm6
2. Connect a suitable source to the input jack, as pictured. Sources may be MP3 or CD players, iPods, or any line-level devices. Alternatively, you may connect the XM6’s rear panel USB port. Be sure to set the rear panel source-select switch (switch-out selects front panel input;... -
Page 7: Usb
USB DAC To use the XM6’s USB DAC, simply connect the XM6 to your computer, using the included USB cable. The XM6’s rear panel USB connector takes a “Mini USB Type B 5-pin plug”. • You may connect the XM6 through a USB hub, if desired. -
Page 8: Power Button Functions
3 presses: Turn unit on for three hours. 6 presses: Turn unit on for six hours. 7 presses: Turn unit on. The XM6 will not turn itself off. Press and hold: Turn unit off. The unit will respond to button presses by flashing the blue LED once for each hour it will stay on. -
Page 9: Crossfeed Controls
Only works when Enable switch is enabled. Switch tereo The XM6’s Active Crossfeed circuit simulates the sound stage of loudspeakers, through your headphones. Press the Switch IN to activate Crossfeed. • Leave the button OUT for full stereo operation, •... -
Page 10: Bass, Treble, Gain Boost
Treble Boost enabled Gain Boost With the volume knob at full, your XM6 will deliver +10dB of gain. Additionally, you can enable the gain boost switch, which will give you an extra +8dB of gain, for a total of approximately +18dB. -
Page 11: Output, Voltmeter
Testing the Battery The XM6 can test its own battery: When the XM6 is turned on, the amber LED will display the battery voltage by flashing. For example, if the voltage is 8.5 volts, the LED will flash 8 times, then 5 times. -
Page 12: Joystick
Multimedia Controller Joystick Your XM6 is equipped with a rear panel Joystick, which has the following functions: Next Track Previous Track Play/Pause Toggle These functions only work when listening to USB audio. We have arranged the joystick such that when you are looking at the front of... -
Page 13: Auxiliary Connector
Aux Connector The rear panel of your XM6 has an Auxiliary Connector, for future expandability. The connector is 2x4 pins with 2mm pitch. The pinout is proprietary, but Practical Devices has released it into the public domain; the pinout is shown below:... -
Page 14: Disassembling The Unit
Disassembling the Unit FOR ADVANCED USERS ONLY! If you want to replace the amplifier or buffer chips, you will need to disassemble the unit. Here's how: 1. Turn the unit off, and unplug all cables. 2. Remove volume knob using supplied .035”... -
Page 15: Reassembling The Unit
Reassembling the Unit Install Battery Connect battery connector with proper polarity (there are markings “RED WIRE” and • “BLACK WIRE” on the PCB to help). Battery cable neatly underneath battery. • One side of the battery is “flatter” than the other. Orient battery with flatter side facing UP. •... -
Page 16: Battery Power Systems
(available from your local electronics store). DO NOT plug anything else into the powerjack, or damage may result. • NOTE: Only use the power supply that came with the XM6. Do not plug anything else into the powerjack, or damage may result. -
Page 17: Frequently-Asked Questions
Frequently-asked Questions Can I use a line-level input to the XM6, such as from a CD/DVD player or VCR? Yes, the XM6 will accept a line-level input. Can I use the XM6 to drive speakers? Usually, no. The XM6 was designed as a headphone amp, and will usually not do a good job of driving speakers, even small ones (most speakers have impedances of around eight ohms). -
Page 18: Troubleshooting
Troubleshooting Here are some common problems, and possible solutions: USB doesn’t work: Unplug the USB connector, wait 10 seconds, then plug it back in, and restart your • multimedia application. Remember: plugging in the AC adapter while USB is connected can cause USB •... -
Page 19: Notes
Notes... - Page 20 Notes, cont.
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Page 21: Warranty And Guarantee
Practical Devices stands behind its products with a full no-risk warranty and money-back satisfaction guarantee. Practical Devices offers a 30-day money-back guarantee on all of our products. If, for any reason whatsoever, you are unsatisfied with your purchase, you may return it for your money back, including your original shipping cost. -
Page 22: Technical Specifications
Specifications Portable Audio Headphone Amplifier, Description: with USB Upsampling and 24-bit 192kHz DAC. Weight: 145 grams (5.1 oz) Power Source: Lithium-Ion Rechargeable System External Power Supply: Lithium-Ion adapter/charger, 120- 240VAC, 50/60Hz worldwide compatible. Battery Charge Time (approx.) 1.5 hours Battery Life (approximate, depending on installed options): 35 hours Maximum Gain:... - Page 23 Specifications (Continued) Bass Boost (approx.) +6dB @ 100Hz Treble Boost (approx.) +3dB @ 10kHz Active, user-adjustable from mono to stereo Crossfeed using potentiometer; User can bypass using pushbutton. Auto Power-OFF User selects between 1, 3, or 6 hour poweroff interval, or unit can be set to stay on indefinitely Status Indicators Two LEDS (one blue, one amber), indicating: low battery warning, battery voltage, and...
- Page 24 XM6_v41 ©2010 PRACTICAL DEVICES CORPORATION www.practicaldevices.com...
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