Lindemann Limetree USB DAC D A Converter Headphone Amplifier User Guide

Lindemann Limetree USB DAC D A Converter Headphone Amplifier User Guide

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INTRODUCTION

Congratulations and thanks a lot for your decision to buy a LINDEMANN product. We have been de- veloping and manufacturing our products in Ger- many for 25 years and put all our experience and passion into the sound quality of this device. Lean back and rediscover your favorite recordings. We guarantee you world-class musical enjoyment.

A First Note

Please read this operating manual complete- ly and thoroughly. It is an integral part of this product and contains important notes on how to use it correctly. Keep this manual for future reference

SAFETY INSTRUCTIONS

• A contact with mains voltages is potentially lethal! Use only reg- ular mains outlets and undamaged power cables to operate this
• Use the included power supply exclusively to operate the Op- erating the unit with any other than the included power supply will result in an exclusion of liability and warranty forfeiture. The pow- er supply is only dead when it’s not connected to a power outlet!
• Operate the unit in a safe place and lay cables in such a way that no one can trip over them. Keep the unit away from children. Do not leave the running unit
• Do not open the unit and do not perform any modifications on the This will result in an exclusion of liability and warranty forfeiture.
• While in operation the unit must under no circumstances be ex- posed to moisture or liquids. Protect the unit from dripping or splashing liquids and keep it away from vessels filled with
• Prior to initial operation, check the package contents for com- pleteness and A damaged unit must by no means put into operation.
• Use the product only for the purpose described in the following Misuse will result in an exclusion of liability and war- ranty forfeiture.

EU Declaration of Conformity

With the CE symbol LINDEMANN audiotechnik GmbH declares that the product meets the basic requirements and directives of the European Union.

Proper disposal of electric appliances

In accordance with the European WEEE Directive, electronic de- vices must not be disposed of with the household waste. Pursuant to the Directive 2012/19/EU, they may be returned free of charge to the manufacturer, the seller or a public collection point at the end of their service life. With this kind of disposal you make a valuable contribution to the protection of our environment. WEEE reg. no.: DE 39271874.

PRODUCT DESCRIPTION

The Limetree USB-DAC is a super high-quality digital-to-analog converter featuring an analog volume control and a headphone amplifier to boot. Selecting the volume with a rotary knob plus the included remote control make it the ideal game partner for music reproduction over a computer. Through a USB cable it is connect- ed to a USB port of a notebook or desktop computer where it re- places the internal soundcard of this device. That way the sound quality of the music playback can be raised to the level of the best hi-fi equipment. The Limetree USB-DAC can be used as a stand- alone headphone amplifier, but also simultaneously as a preamp for active speakers or power amps.

The circuitry and above all the component selection of the Lime- tree USB-DAC have been optimized down to the smallest detail to offer ultimate sound characteristics. All music files are re-clocked by means of an ultra precise FemtoClock: the thus processed data are free from “jitter“, the most frequent cause for poor digi- tal playback. The sound is open, natural and follows the recording in the best sense. For the output stage we use one of the finest amplifier modules on the market which sets benchmarks as a headphone amplifier in terms of sound.
For the power supply we use a high-quality “medical grade“ mains adapter to ensure a very high decoupling from any mains interference. Together with the elaborate filtering in the device and special voltage regulators an extremely trouble-free power supply with noise values below 10 µV is achieved.

FUNCTIONAL DESCRIPTION

1. Headphone socket 5 mm (1/8“). Inserting the headphone plug will activate the headphone output and defeat the line output.
2. Function indicator for DSD playback: when the LED is yellow, a DSD file is currently being
3. Function indicators for the selected input: USB, D1 (digital input 1 = coaxial), D2 (digital input 2 = optical).
4. Multifunction control element for controlling volume, mute, and input selection. Turn = loud/soft, press = mute, press and hold while turning = input Infrared receiver for the IR remote contro

FUNCTIONAL DESCRIPTION

1. Analog line output for connecting power amps or active
2. Digital input 2: optical digital input (TOSLINK)
3. Digital input 1: coaxial digital input (75 ohms LPCM)
4. USB-B input: USB audio class 2 port
5. Low voltage connector 5 V Caution: only the included plug-in power supply may be used.

INFRARED REMOTE CONTROL

1. Stand-by button: turns the device on and 1
2. Mute button: switches the volume to
3. Dim button: controls the brightness of the
4. Skip buttons: skip to the next/previous
5. Volume buttons: set the volume
6. Input selector button: selects the active
7. Info button: not assigned in the Limetree USB-DAC.
8. . Eject key: not assigned in the Limetree USB-DAC.
9. Play/Pause key: play back or pause theselected track.
10. Battery compartment on the rear side.

STARTUP

• Connect the included power adapter to a mains outlet and the cable plug to the 5V DC input of the USB-DAC.
• Connect one USB-A port of your notebook or desktop PC to the USB-B port on the Limetree USB-DAC. Optionally you also want to connect a digital source to one of the digital
• Turn on the device using the toggle switch on the The On-LED will light up green.
• Now select the desired input by means of the remote control or the (pressed) rotary
• Connect a headphone to the headphone socket on the front panel or a power amp or active speakers to the line output on the rear Switching between the outputs is automati- cally done by connecting the headphone. If no headphone is plugged in, the line output will be active.
• To use the Limetree USB-DAC for the sound output of your notebook or your desktop PC, the device must be set up in the device settings of the

Please note:

For playing back DSD files special software players are required. Roon, Audirvana or J.River Media Center are re- commended here, among others. The mentioned players offer lots of functions for managing music libraries and allow a reproduction in studio quality. More informa-tion about how to optimize the sound quality can be found at the respective providers.

STARTUP

Installation on WindowsAfter turning on the Limetree USB-DAC, the device will be recognized and automatically installed by the Win-
dows updater. For further setup of the device please follow the path Settings

System > Sound > Device properties > Additional device properties > Extended. Here you will find a list of all availa- ble sample rates. Important to know: DSD is not supported by Win- dows. For this you will need special drivers and/or an appropriate software player.

Installation on MacOS

After turning on the Limetree USB-DAC, the device will be recognized and automatically installed by
MacOS. For further setup of the device please follow the path System settings

Sound. Here you can select the device for the sound output. Further settings can be done under Used Objects
Audio Midi Setup. Here you will find a list of all available sam- ple rates. Important to know: DSD is not supported by MacOS. For this purpose you will a DSD-capable software player.

Installation on MacOS

After turning on the Limetree USB-DAC, the device will be recognized and automatically installed by
MacOS. For further setup of the device please follow the path System settings

Sound. Here you can select the device for the sound output. Further settings can be done under Used Objects
Audio Midi Setup. Here you will find a list of all available sam- ple rates. Important to know: DSD is not supported by MacOS. For this purpose you will a DSD-capable software player.

Installation on MacOS

After turning on the Limetree USB-DAC, the device will be recognized and automatically installed by
MacOS. For further setup of the device please follow the path System settings

Sound. Here you can select the device for the sound output. Further settings can be done under Used Objects
Audio Midi Setup. Here you will find a list of all available sam- ple rates. Important to know: DSD is not supported by MacOS. For this purpose you will a DSD-capable software player.

TECHNICAL SPECIFICATIONS

Power consumption: 0.1 W standby, 3 W operation
Power supply: 5 V DC
Dimensions (W x H x D): 107 x 40 x 107 mm (4.2 x 1.6 x 4.2 in.)
Weight: 292 g (10.3 oz.)

D/A converter

Resolution: 24 bit
Sample rates: PCM up to 768 kHz, DSD up to DSD512
Dynamic range: > 120 dB
THD & noise: < 0.003 % (@ 0 dB FS)
Clock: ultra low jitter MEMS FemtoClock

D/A-Converter: ES 9038 Sabre DAC

DAC filter: minimum phase slow roll-off filter
Output voltage: 2.0 V @ 0 dB FS
Volume level control range: 80 dBs in 1-dB steps Headphone connector: 3.5 mm (1/8“) jack socket Recommended headphone impedance: 16-300 ohms

GUARANTEE

Our products are manufactured exclusively in Germany by ISO- certified plants. Each single device is then put to a full, also me- trological functional check at our premises. Therefore with a clear conscience we grant an extended 3-year warranty period. An important prerequisite for making claims under this extended guarantee is the online registration on our website. We suggest you do the registration right after purchasing the device.

Please note: the guarantee does not cover damages arising from improper use of the device. Also excluded from warranty cover- age are such devices which were opened or on which repair at- tempts or modifications were performed by third parties. Liability for consequential damages arising thereof is excluded. Moreover, any liability beyond the product value is excluded. Any deviating guarantee commitments by dealers shall not be binding for us.

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References

• AUDIO - Das Magazin für HiFi, Surround, High End, Musik - connect
• Lindemann
• Lindemann

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