OSD Black
SRT1 and SRT4 Wi-Fi Streaming Modules

OSD Black, an Audio Gear Group brand, is launching the SRT series of preamp streaming modules that combine Wi-Fi and Bluetooth (ST1 only) with the audio experience that traditional amps, receivers, and speakers provide. The OSD Black SRT1 is a single-zone wireless streaming pre-amplifier, while the SRT4 is a four-zone wireless device, and both connect to existing whole house audio systems or two-channel setups. The company showed the modules at CEDIA Expo 2019 in Denver.

Stand-alone devices, the SRT 1 and SRT 4 include a 24-bit DAC that delivers DVD-level sound quality to streaming platforms, such as Spotify, Napster, and Tidal as well as a streaming Internet radio stations such as iHeartRadio and TuneIn. The SRT1 also features a direct analog 3.5mm line-level input and TF (SD content) card slot input. Outputs include signal level aux and optical.

The SRT4 features a unique Universal Bus with dual RCA stereo right/left inputs, a single optical input available for all four zones, and a direct USB (content) input for each zone. It also features an analog RCA stereo (right/left) output and digital optical fiber output for each zone as well.  All input sources are controlled by the free OSD Play App for smartphones or tablets.

“Wi-Fi streaming is great, but audiophiles know that streaming comes at the cost of sound quality,” says Bryan Strachota, AGG’s National Brand Manager. “Our SRT Series bypasses the tiny Digital-to-Analog Converters in smartphones and tablets and uses its own, more robust converter, so you’ll hear the sonic nuances so sorely missed with standard streaming.”

In addition to the OSD Play App, there is a slim-line IR remote control included with both the SRT1 and SRT4 for direct access to sources as well as volume up and down, play/pause and previous/advance buttons.  A LAN connection available on both SRT1/SRT4 allows for direct connection to a Wi-Fi router for Automatic Configuring or a WPS button for wireless connection and manual configuration. Lastly, there is an RS485 connector on the SRT4 for controlling multiple devices and for interfacing with an external control system.

According to Strachota, the SRT1 can be paired with the SRT4 to take streaming audio to other areas of your home by connecting additional preamp SRT1/amplifier combinations to create more sources and zone options.

“It’s a beautiful and simple way to stream audio from room to room, and it’s all controlled from your smartphone, tablet or laptop,” he notes.

Features of the SRT1 and SRT4 Wi-Fi Streaming Modules include:

  • Compatible with Spotify, Napster, Tidal Music Services, iHeartRadio, and TuneIn
  • Can be used with Alexa to play other music sources or internet radio
  • Easily controlled with the free OSD Play App for smartphones or tablets
  • Expandable for affordable whole-house audio
  • SRT1 Inputs: Internal Wi-Fi, Bluetooth, 3.5mm line-in and TF (SD Mini Content) Card Slot, Bluetooth Internal Source Connection Version: 4.2 w/ aptX™
  • SRT4 Inputs: Wi-Fi, USB Input to play Music Content, and Two Universal Bus Stereo RCA Analog Inputs and a Single Optical Digital Input selectable per zone
  • SRT1 Outputs: Optical Digital Output and 3.5mm Aux Stereo Analog Output
  • SRT4 Outputs: Left and Right RCA Analog Stereo Output and Optical Digital Output per each zone
  • Lan Connection on both the SRT1 and SRT4 for automatic configuration
  • Both the SRTR1 and SRT4 include a WPS button for manual wireless configuration
  • SRT1: RS232 connector and the SRT4, RS485 connector (RS232 for multiple devices)
  • Both units feature front panel status LEDs
  • SRT1: Line-in, Bluetooth, Wi-Fi9, and TF card
  • SRT4: Zone Power Indicators 1-4 and sources: Blue/Wi/Fi, Red/Universal Bus line-in, Purple/USB
  • Cirrus Logic CS8416 24 Bit/192kHz DAC for DVD-level sound quality

Product Info:

OSD Black
Manufacturer URL:  
$199 and $649