Practical Devices XM4 Скачать руководство пользователя страница 1 | Manualshive

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Practical Devices XM4 Скачать руководство пользователя страница 1

XM4

Headphone Amplifier

User’s Manual

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Содержание XM4

Страница 1: ...XM4 Headphone Amplifier User s Manual...

Страница 2: ...If you have any questions that are not answered by this manual please feel free to send us an email Enjoy the amp Yours truly James Forest President CEO A Word About Protecting Your Hearing The most...

Страница 3: ...ontrols 7 Disassembling the Unit 8 Replacing the Battery 9 Gain Boost Jumpers 10 Lithium Battery Charger 11 External Power Supply 12 Testing the Battery 13 Frequently Asked Questions 14 Troubleshootin...

Страница 4: ...rning when the battery is very low below 5 2 volts Blue LED Indicates power is on Crossfeed Enable Switch IN position Crossfeed enabled OUT position Crossfeed disabled Crossfeed Adjuster Turn this pot...

Страница 5: ...onnect a suitable source to the input jack as pictured Sources may be MP3 or CD players iPods or any line level devices 2 Connect your headphones to the output jack Your headphones can have an impedan...

Страница 6: ...unit on for three hours 6 presses Turn unit on for six hours 7 presses Turn unit on The XM4 will not turn itself off Press and hold Turn unit off The unit will respond to button presses by flashing th...

Страница 7: ...The studio technicians mixing the recording assume there will be alot of crosstalk since with speakers the listener s left ear clearly hears the right speaker s output and vice versa Thus most music...

Страница 8: ...a pair of pliers as shown to tighten things up If you need to change the Gain Boost Jumpers or Battery Charger Jumper you will need to disassemble the unit Here s how Note there is a notch in the cas...

Страница 9: ...ery clip first into the XM4 The battery should not protrude out of the rear of the unit if it does protrude you won t be able to completely screw down the rear panel Check that the battery cable hasn...

Страница 10: ...umpers 10 Usually the Gain Boost jumpers are only needed when using headphones which have an impedance greater than around 150 To install or remove the Gain Boost jumpers 1 Disassemble the unit see pa...

Страница 11: ...rging is finished the LED on the charger will turn from red to green The battery will charge even if the XM4 is turned on You can leave the charger connected indefinitely You can expect up to 40 hours...

Страница 12: ...use the XM4 s integrated battery trickle charger to recharge it RadioShack 23 529 battery will work or any of the following types of rechargeable batteries can be used Nickel Metal Hydride NiMH 8 4v...

Страница 13: ...Only change the charge jumpers from their factory defaults if you want to install a NiMH or NiCd rechargeable battery For advanced users only Testing the Battery The XM4 also acts as a battery tester...

Страница 14: ...I use the XM4 to drive speakers Usually no The XM4 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...

Страница 15: ...seconds then reconnect the battery Headphone volume is too quiet even with the volume knob at full Increase volume of source MP3 player If it is still too quiet then install the Gain Boost jumpers se...

Страница 16: ...16 Notes...

Страница 17: ...e same undamaged good working order as it was received Practical Devices will refund you the original cost plus the cost of the original shipping Customer must pay for return shipping cost Further we...

Страница 18: ...y charger 12VDC 5 If not using battery charger 6 15VDC Optional Lithium charger can also be used Battery Charge Time Lithium Charge System 2 hours Trickle charge NiMH 15 hours Battery Life typical Alk...

Страница 19: ...on indefinitely Status Indicators Two LEDS one blue one amber Integrated Voltmeter accuracy typical 100mV Mechanicals Anodized aluminum case Glossy laser anodized faceplate Polished aluminum volume k...

Страница 20: ...XM4_v35 2007 www practicaldevices com...

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