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KBSound In-Wall PREMIUM Bluetooth Audio Receiver Kit, US, 2.5 In.

SKU: ES541x7

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WARNING: Cancer and Reproductive Harm –


Pair Your Bluetooth Device And Listen To Quality Sound From 2-1/2" Speakers

Add premium audio control to your home audio system with the KBSOUND In-Wall PREMIUM Bluetooth Audio Receiver with Two 2.5" Speakers and Power Supply, (U.S.). This kit includes a PREMIUM audio receiver, two 2-½" speakers, and a power supply. The in-wall audio receiver supports up to 4 different audio channels, Bluetooth, FM Radio, and two local sources, to relay audio to connected wired external speakers. This audio receiver can fit into a European sized light switch opening (45x45mm) and connect to 2 stereo speakers or 4 mono speakers. The receiver's signal range of 33 feet makes it easy to pair with your smartphone or other Bluetooth compatible device.

  • Includes a PREMIUM Bluetooth Audio Receiver, two 2-1/2" speakers, and power supply
  • In-Wall audio receiver sends audio from Bluetooth, FM, or local wired sources to up to 4 external speakers for audio streaming systems
  • Connects to either two stereo or four mono audio channels
  • Fits into European sized light switches (45x45mm)
  • Pre-programmed keypad shortcuts provide additional functionality including saving preferred setting, easily connected Bluetooth devices, and more
  • Bluetooth ID can be assigned to each module so that they can co-exist in the same installation

The KBSOUND PREMIUM In-Wall Bluetooth Audio Receiver features a power button, an audio input channel button, channel selection/Bluetooth ID buttons, volume control buttons, and digital display. The digital display shows which audio source is currently active, what the volume level is, and more. The audio input channel button allows you to cycle between connected audio sources. The Channel selection/Bluetooth ID buttons enable you to change FM radio stations when using the FM radio or input a password to pair a Bluetooth device to the receiver. Up to 10 FM radio stations can be saved at a time, while only 1 Bluetooth audio source can be connected at a time. The volume control buttons adjust the volume level.

Volume limits, EQ settings, ideal audio settings (saved and remembered on activation), connected audio sources, and more can all be configured during initial setup. The PREMIUM In-Wall Bluetooth Audio Receiver can support two 8 ohm stereo speakers or four 8 ohm mono speakers (speakers not included) with a maximum speaker output of 1.5W.

Each audio receiver module has a KINGBT-XXXX identifying number associated with it. The XXXX will be the serial number that lets the user identify each individual module that co-exists within the same installation. An adhesive label with the serial number is included with each module so you can fix it to the face cover. This will allow users to choose which module to stream audio through from their smartphone or other Bluetooth friendly device.

Control Your KBSOUND System with the KBSOUND STAR App

KBSOUND STAR App controls your KBSOUND STAR devices via BLE (Bluetooth Low Energy) connections from your connected smart device. Once a Master or Auxiliary KBSOUND STAR device is paired with your smart device, input the KBSOUND's unique ID and password to secure the connection. From the app's home screen, you can power on/off the selected device, select your audio source, adjust volumes, and more. Your Bluetooth smart device must remain within effective Bluetooth range of the Master station in order to control the system. Up to 4 Auxiliary Amplifiers can be connected to a Master station.

  • Power On/Off the Master and Auxiliary KBSOUND STAR devices separately or jointly
  • Save your favorite FM or DAB radio stations for future use
  • Bluetooth audio streaming allows you to play audio directly from your smart device or connect a nearby Bluetooth capable device such as a laptop, smart TV, Amazon Alexa and more
  • Multiple users can save their preferred settings, volume levels, radio stations to their smart devices


  • PREMIUM Audio Receiver
  • (2) 2-1/2" Speakers
  • Power Supply
  • Manual


  • It's recommended that the rough in back box should be a one or two gang UN/CSA approved 18ci plastic junction box.
  • Do not use metal back boxes which may interfere with the Bluetooth signal.

KBSound: Providing Quality Audio Solutions

Since 1993, KBSound has been producing innovative products in the Multiroom Audio Sector. As the first to create an audio control unit specifically designed to fit and mimic the look of most popular light switches, KBSOUND's in-wall audio control units provide an easy way to listen to digital audio content in quality sound. From In-Wall Bluetooth Audio Receivers to Soundaround Wi-Fi Speakers, KBSOUND's product range is always evolving so that consumers have the very best audio solutions available.


  • Manufacturer Part #:
    • 54157: Black
    • 54107: White
  • UPC:
    • 54157: 8436031616866
    • 54107: 8436031616897
  • Speaker Impedance: 4/8/16 ohms
  • Speaker Output: 5W stereo max.
  • Other Connection: Volume limitation and mono/stereo jumpers
  • LED Display:
    • Off: Disconnected and Audio Off
    • Bluetooth: Blue Flashing – searching BT Device
    • Bluetooth: Blue On – BT connected
    • Audio-In: Red On – Audio-In Activated
  • Voltage Terminals VDC, GND:
    • Normal: 15Vdc
    • Min: 11Vdc
    • Max: 15.5Vdc
  • Consumption Demand:
    • Min: 21mA
    • Normal: 61mA
  • Input Signal:
    • Normal: 2.75 Vrms
    • Prof: 1.22 Vrms
    • Other: 0.32 Vrms
  • Input Impedance:
    • Normal: 33 Kohm
  • Output Signal Output 8 ohm:
    • Max: 1.5W
  • Output Signal Output 16 ohm:
    • Max: 1W
  • Output Signal Line Terminals 05, 06, 04:
    • Max: 1.29Vrms
  • Output Signal AMP1 Terminals 05, 06, 04:
    • Max: 2.59Vrms
  • Output Signal AMP2 Terminals 05, 06, 04:
    • Max: 1.82Vrms
  • Amplifier Trigger Signal Terminal 05 (DC Component):
    • Max: 5Vdc
  • Amplifier Trigger Signal Terminals 0/62:
    • Max: 14Vdc
  • Amplifier Trigger Output Impedance:
    • Max: 1.8 Kohms
  • Calls Signal Terminal 7:
    • Normal: 2.75 Vrms
  • Passband:
    • Minimum: 20Hz
    • Maximum: 22,000Hz
  • Distortion:
    • Normal: 0.1%
    • Max: 1%
  • FM Frequency Range:
    • Normal: 87.5 MHz
    • Max: 108 MHz
  • FM Antenna Impedance:
    • Normal: 75 ohms
  • Antenna Sensitivity:
    • Normal: 3.5 uV
    • Maximum: 10 uV
  • Tuner Distortion:
    • Max: 1%
  • FM Favorites: 10
  • Bluetooth Specifications:
    • Class2 BT4.2 dual mode
    • BLE, A2DP 1.3, AVRCP 1.6
  • Wireless Transceiver: 2.4 GHz
  • RF Power Transmitter: 2 dBm
  • RF Antenna: Internal
  • Dimensions:
    • Exterior: 1.77 x 4.17 x 1.77 inches (45 x 106 x 45mm)
    • Cavity: 1.77 x 1.77 x .41 inches (45 x 45 x 36mm)
    • Face Cover: 1.30 x 2.60 inches (33 x 66mm)
  • Range: 33 feet (10m)