Altec Lansing BXR1320: Bluetooth Mod & Audio Upgrade

The Altec Lansing BXR1320 stands as a multimedia speaker meticulously crafted for compatibility with laptops and mobile devices. Notably USB-powered with a 3.5mm audio input, this speaker boasts commendable audio quality.

In this instance, a thorough disassembly was undertaken to enhance its functionality by integrating an internal lithium battery-driven Bluetooth system, eliminating the necessity for USB power. The accompanying visual representation details the exterior features of this modification.

Initiating the disassembly process, the interior reveals strategically placed sound-absorbing cotton, showcasing Altec Lansing's innovative dual-magnetic speakers. 

The amplifier board's frontal aspect showcases the SJ2206B 2.3W dual-channel amplifier chip and an input-inductor.

On the rear side of the amplifier board...

Above the sound guide aperture, the Bluetooth receiver is securely positioned. Noteworthy adjustments include the removal of the headphone jack and two solid-state components from the Bluetooth board, subsequently filling the screw holes. Two capacitors are skillfully interconnected via jumpers, creating a Weima capacitor for enhanced Bluetooth output.

Post-application of the shielded wire, the Bluetooth board is seamlessly powered, establishing a connection to the power switch on the amplifier board. Below the sound guide hole, a charging protection board is affixed, complemented by the addition of a lithium battery atop the motherboard. A comprehensive capacitor replacement regimen is implemented on the amplifier board.

To ensure a streamlined aesthetic and operational integrity, all wires are meticulously adhered, and supplementary jumpers are employed to interconnect the capacitors.

Upon successful reassembly, the device powers up flawlessly, with a negligible noise at peak volume that falls within acceptable parameters.

The posterior aspect of the speaker receives a functional upgrade with the inclusion of a charging port, eliminating the need for multiple cables and enhancing the overall visual appeal.