Slim Devices Transporter

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Transporter is an expensive hi-end audiophile grade network audio player that is designed by Slim Devices (now Logitech Inc). The player is preferred by audiophiles due to it's reduced clock noise and intrinsic jitter, which is the only distinct difference between it and the Squeezebox. Additionally it can interface with many streaming internet radio stations, including the open-source Slim Server software. Transporter was first released and shipped in September 2006.

Technical Specifications

Audio Input and Outputs

Audio Outputs

  • Digital and analog outputs
  • Gold-plated RCA, XLR, and BNC connectors
  • Volume control is provided for all outputs
  • Multiple outputs may be used at the same time

Analog Outputs

  • AKM AK4396 Multi-bit delta-sigma digital to analog converter
  • Signal-to-noise, Dynamic Range: 120 dB
  • THD+Noise: -106 dB (0.00005 %)
  • Linear Super-Regulated supplies for DAC and line-out stages

Digital Outputs and Inputs

  • Optical, coax, BNC, and XLR digital connectors
  • Word clock input for synchronization with an external clock
  • Linear-regulated power for all clock paths
  • Dedicated high-precision crystal oscillators (no PLL, no resampling)
  • Standard IEC-958 (S/PDIF) or AES/EBU encoding
  • Optical connector: TOSLINK 660nm
  • RCA connector: capacitor-coupled 500mVpp into 75 ohms
  • BNC connector: transformer-coupled, 500mVpp into 75 ohms
  • XLR connector: 4.7Vpp into 110 ohms
  • Sample rates: 44.1kHz, 48kHz, 96kHz
  • Audio format: linear PCM, 16 or 24 bits per sample
  • Jitter (standard deviation):
11ps at oscillator (intrinsic jitter)
17ps at DAC
35ps at S/PDIF receiver

Audio Codecs




  • MAD decoding
  • High accuracy 24-bit synthesis
  • Sound check and ReplayGain support for adjusting the gain on your audio files.

Technical information


  • Flash upgradeable firmware
  • Network settings are stored in non-volatile memory
  • Auto-configuration for most networks
  • Easy setup for wireless networks


  • 325 MHz 8-way multi-threaded RISC processor
  • Field-upgradeable Xilinx CPLD
  • 64 Mb high-speed RAM
  • 16 Mb program flash
  • Low-power, fanless design


Wireless Interface

  • True 802.11g wireless networking (can be disabled)
  • Bridging capability allows Ethernet devices to connect to the network through the wireless interface
  • Throughput up to 54Mbps, high speed PCI interface to radio module
  • Dual external antennas for improved range and throughput
  • Supports all 802.11b and 802.11g access points
  • Automatically detects available wireless networks for quick setup
  • Supports both WPA Personal, WPA2-AES and 64/128-bit WEP encryption

Ethernet Interface

  • True 100 Mbps throughput
  • Shielded CAT5 RJ-45 connector
  • Connects to any 100Mbps or 10Mbps network
  • Auto-detects full duplex and half duplex modes
  • Automatic receive polarity correction
  • Maximum cable length: 100 meters (328 feet)


Power Input

  • 100–240 V, 50-60 Hz AC
  • Internal Fuse: 500 mA
  • Standard IEC power connector
  • Included IEC power cable specific to shipping destination

Power Supply

  • Separate linear supplies for Analog, DAC, and clocks
  • Auto-ranging, relay-controlled AC input
  • Three Super Regulators for analog stages (+15, -15, +5)
  • High-efficiency, low noise SMPS for CPU, Display
  • Continuous AC voltage monitoring
  • Automatic over-voltage protection
  • Low-power "deep sleep" mode

Software installation

System Requirements

  • All systems: 256MB RAM, ethernet or wireless network, and 20MB hard disk space
  • Macintosh: Mac OS/X 10.3 or later
  • Windows: 733Mhz Pentium running Windows NT/2000/XP
  • Linux/BSD/Solaris/Other: Perl 5.8.3 or later

External links