Beautiful, streamlined and integrated – Lindemann musicbook:source

Are you still connecting piles of audio equipment with many wires? Is it crazy to dream of simplifying the Hi-Fi system? Isn't this simplicity at the expense of quality? Of course, it is more economical for the system to cut down the number of equipment. Because of the high production cost of the aluminum housing, can save a lot of cost, and it can also reduce the power supply. Moreover, directly connecting the internal wiring can also reduce the cost of external connection related wires. Sounds simple, doesn't it? If you want to get excellent sound quality, this is not so easy...

Lindemann musicbook: SOURCE is a very modern digital streaming music player, and Tongmen POWER 500 is the same modern class D power amplifier. These two sleek and exquisite Lindemann musicbook products, the chassis are all made of solid aluminum. SOURCE has a beautiful and clear OLED display, which is much clearer than the photos can see. It is rich in both external and internal beauty, and will not lose to the production level of products with much higher prices.

What does the SOURCE streamer have? This is a very flexible component. It can stream from Qobuz, TIDAL, Deezer, Hi-Res Audio, native Spotify and Amazon HD. At the same time, non-native streaming can be achieved via Bluetooth. In addition, it also includes Roon Ready, Internet radio broadcasts and podcasts. You can also play music files via USB connection or from a music server (NAS). These are the files you have downloaded and copied, and you can even connect a USB CD drive to play CDs. It is a very full-featured digital streaming music player! There is even a built-in MM phono amplifier of the famous Lindemann Limetree Phono, which is really attractive for users who don't want to be too troublesome!

If all the built-in source options of SOURCE are not enough, there are also 2 sets of additional analog signal input RCA sockets, coaxial and optical digital input. The USB socket on the machine is only used for reading memory and not for digital input. The internal DAC can also be used independently. In addition, the preamplifier and headphone amplifier are included. Yes, all of these are packed in one chassis. Available outputs include balanced XLR and single-ended RCA. It's really surprising that there are so many kits in such a small case. It's a miracle. SOURCE can connect to the Internet via Wi-Fi or Ethernet, and as mentioned above, it also has a Bluetooth connection.

The musicbook POWER 500 is simpler as a power amplifier. In addition to the regular stereo mode, it also has an adjustable 10-stage gain bi-amp mode (for bass matching) or bridged into a mono mode, so even the POWER 500 amplifier has its complicated functions. The POWER 500 has a power of 250 watts (4 ohms) per channel, and there is also a POWER 1000 that outputs 500 watts.

Lindemann's preferred way to play music files is to make SOURCE read the music stored on the network (NAS). When the NAS device is connected to the router, it will automatically respond to the SOURCE request. This makes it possible to use pre-loaded music album pictures when searching from the Lindemann application dedicated to controlling SOURCE.


Streaming technology

The founder of Lindemann, Norbert Lindemann, has more than 30 years of experience in the industry. The company was founded in 1993. Norbert also has more than 20 years of digital experience, determine Lindemann's philosophy is well thought out. The advantage of putting the stream/DAC/preamp in the same chassis is that the interface between each component circuit is simplified, and a single chassis also brings the benefit of grounding.

About DAC chip, clock chip, jitter performance, circuit board layout and power quality. According to the manufacturer's product information, its clock jitter is lower than 12 Hz. In streaming data, both the digital signal and the main clock are generated by the streaming processor. It is essential to use a very accurate clock to sample the data. The master clock in SOURCE is reclocked synchronously via a PLL with a Femto reference. Lindemann uses MEMS clocks because they are not affected by microtones or temperature drift and aging. Ultra-low noise power supply can ensure that the clock jitter is as low as 10Hz. Then, according to the user option in the Lindemann application, use the clock to resample the data in PCM or DSD with 32bit precision.



From merging the CD player (CD turntable + DAC) to connecting the DAC with a computer or a streamer, it can get rid of the complexity of the connection cable through a fully functional stand-alone operation. The accessories used before, such as clock timer, noise filter, Isolated power supplies, special cables, etc. all bring additional complexity to the multi-machine approach. Of course, any Streamer-DAC design has many correct places, but putting it all in one chassis will simplify some problems. The single chassis eliminates those additional gadgets to improve the sound quality. I found that "additional controls" can work in a multi-device setup, but a well-implemented single chassis definitely has greater potential and the circuit is cleaner.

Lindemann has been using upsampling technology for 20 years. For SOURCE, they used AK4137 to resample with 32bit resolution. Two AK4493 DACs with internal dual differential mono mode work in balanced mode. DAC has 768 kHz / 32 bit and DSD 512 capability. During playback, you can choose traditional PCM or DSD up-conversion playback.

The analog filter can be set to 100 kHz. In the case of low-noise power supply, it has an excellent ability to clearly restore sound. In addition, the new AK4493 chip is currently the best DAC in terms of current low-level, high-analysis power and low-distortion performance.


Phono Amplifier

The musicbook:SOURCE with a built-in moving magnet (MM) phono amplifier has inspired many vinyl users. In such a small case, it is a huge challenge to avoid noise and have a very high gain phono amplifier. This phono amplifier provides MM cartridge standard 47kOhms/150pF input, and the gain can be set to three levels through a dedicated mobile application, so it is not only suitable for MM cartridge amplification, but can even be used for high-output MC cartridges .


Pre-amplifier, analog input and headphone amplifier

The pre-amplifier part of SOURCE is another high-spec element, and the volume control uses the highly regarded MUSES 72320 chip. And uses the best amplification components. The pre-amp output provides single-ended RCA and balanced XLR output. The maximum output voltage of RCA is 2.5V, the output impedance is 100 ohms, and the XLR is 5V and 20 ohms. There are 100 levels of volume control, the first 21 levels are 2dB each, the next 40 levels are 1dB, and the rest are 0.5dB. There is also a balance control with +/- 6dB adjustment in 1dB steps. There is an elaborate volume control wheel on the top surface of SOURCE, which can choose as input selection and mute function when pressed instead of turning.

Play Nils Lofgren's live track "Keith Don't Go", which will be played in many audio demonstrations. Of course, this is an amazing song, neatly recorded. When Nils sang "message to millions", it lost a bit of clarity on most systems, so that "millions" sounded more like "zillions". But when using Lindemanns, the sound heard is very clear. I thought it was a recording problem, but now it is definitely not the case. It's no big deal for this particular audio track, but it becomes very important to extend this effect to other audio tracks.

Then listen to "Hotel California" on the Eagles "Hell Freezes Over" CD. It is easy to broadcast, but difficult to broadcast well. The guitar and drum beats at the beginning of the song are very realistic, the low-frequency dive is deep and the texture is deep, and the rhyme makes you feel the essence of the music, so that the listener can quickly plunge into the atmosphere of the music, not with loud volume and imitating extraordinary The sound effects are appealing, and the extremely authentic music makes the listener plunge into the high level of music.

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