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OEM Systems MS-21 Mainstation In-Wall Entertainment System with Installation Kit


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NOTE: This is a heavy/dimensional part; it is not eligible for free shipping.


WARNING: Cancer and Reproductive Harm –


Premium Audio Entertainment Fits Into Your Home

Integrate home audio entertainment and smart security into the walls of your home with the OEM Systems Mainstation In-Wall Entertainment System with Installation Kit! This Android powered in-wall touchscreen audio receiver combines home audio entertainment with limited automation and security control. The Mainstation plays audio from the built-in radio, internal storage, physical media connections, or wireless streaming and supports up to four pairs of speakers at 25W per audio channel. The Mainstation's Android operating system and touchscreen display enable it to download apps from the Google Play store, giving you additional entertainment, automation, and security options. Download your favorite audio streaming apps, connect to your smart hub's mobile app, view footage from your security cameras, and more with this versatile touchscreen controller.

  • Touchscreen in-wall entertainment controller offers control over home audio systems and various smart home or security features
  • Connects to audio sources via Wi-Fi, Bluetooth, AM/FM Radio, AV Aux, USB, Micro SD, and onboard storage
  • Android OS and 10.1 inch HD touchscreen interface enables downloads of mobile applications from Google Play store
  • Built-in output to four pairs of speakers at 25W per audio channel
  • Onboard volume control, input selection, fast USB charging, and microphone
  • Compatible with Google Home
  • View footage from a hard-wired video doorbell or security camera

Installation Details

The Mainstation is designed to be installed into your walls with the included housing unit. It mounts in standard 2" x 4" stud walls (16" On-Center). The Mainstation's low profile in-wall placement makes it ideal for homes, hospitals, offices, hotels, apartments, and more.


  • Main Station
  • Installation Kit
  • Remote Control
  • Wire Harness
  • GPS Antenna
  • AM/FM Antenna
  • Torx Driver
  • (4) Screws
  • (8) Connectors
  • (8) Plugs
  • (2) USB
  • RCA Input/Output
  • Wi-Fi/Bluetooth/Camera Antenna

OEM Systems Professional Quality

OEM Systems Company is a manufacturer of architectural audio products and accessories for residential, commercial and institutional applications, including loudspeakers, electronics and Decorator Style Jack Plates, which mount in standard J-boxes.


  • Manufacturer Part #: MS-21-W-AC
  • UPC: 769381880273
  • Color: White
  • Power Transformer: AC 120 V AC / 240 VAC
  • DC Input Voltage (MS-21 Base Unit): 12-15 VDC 7A Peak
  • Fuse Size: 7.5A ATM Mini
  • AC Input Voltage Range (Power Supply Unit PS-9015): 100 – 277 VAC Auto Select
  • Output Power: 25 watts per channel x4 (dual stereo outputs)
  • Frequency Range: AM 522 – 1710 KHz; FM 87.5 – 108 MHz
  • Frequency Response: 20 Hz – 20 KHz
  • Screen Resolution: 1024 x 600
  • Internal Storage: 32GB (Expandable)
  • Dimensions: 17-7/8" W x 7-3/8" H x 2-3/8"D
  • Mounting: Unit Mounts in Standard 2" x 4" Stud Walls (16" On-Center)
  • Required Wall Cut-Out: 13-1/2" W x 6-1/2" H x 2-1/2" D
  • Faceplate Dimensions: 17-3/8" W x 7-3/8" H x 2-3/8" D
  • Faceplate Thickness: 3/8" (1 cm)
  • Certifications: UL / CSA Listed
  • Warranty: 3-Year Limited