Logitech UE MegaBoom 3 Passive Radiator Replacement

Introduction

If your speaker does not sound right, it may be time to replace the passive radiator. The following guide will show you how to replace the passive radiator in the Logitech UE MegaBoom 3. A passive radiator moves back and forth to create sound thanks to the fluctuations in air pressure within an enclosure based on its resonant frequency. If your device is still loud but the sound and the bass is off the issue is most likely your passive radiator and not the speakers.

Before starting this guide make sure you turn your speaker off and on and test the sound again just incase the frequency issue was not a one time thing. If the frequency is still off you will need to complete this guide.

This is a difficult guide to complete so be sure to read the entire guide thoroughly before starting.

What you need

Step 1 General Disassembly

Logitech UE MegaBoom 3 Passive Radiator Replacement, General Disassembly: step 1, image 1 of 2

Logitech UE MegaBoom 3 Passive Radiator Replacement, General Disassembly: step 1, image 2 of 2

To access all internal components, first flip the speaker upwards to where you can see the base.
Place your blue iFixit opening picks inside the gap between the speaker and the base to act as a lever when opening the speaker.

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Step 2

Logitech UE MegaBoom 3 Passive Radiator Replacement: step 2, image 3 of 3

Using the flat head #4.5 screw driver, carefully lever and rotate the driver around the edge of the speaker to enlarge the gap further.
Here, it is ideal to use a spudger as opposed to the flathead screwdriver, however, the flathead makes it so much easier to pry off the cap.
Pry off the base of the speaker and remove the end cap.

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Step 3 Power Button Control Board

Logitech UE MegaBoom 3 Passive Radiator Replacement, Power Button Control Board: step 3, image 1 of 3

Logitech UE MegaBoom 3 Passive Radiator Replacement, Power Button Control Board: step 3, image 2 of 3

Logitech UE MegaBoom 3 Passive Radiator Replacement, Power Button Control Board: step 3, image 3 of 3

Take off the fiber cover by prying it from the top of the speaker using the flathead 4.5 mm screwdriver.
After the cover is loosened, the cap can finally be pulled off.

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Step 4

Logitech UE MegaBoom 3 Passive Radiator Replacement: step 4, image 3 of 3

Remove the top half of the speaker using the 4.5 mm flat head screwdriver.
Now remove the top of the speaker by prying and releasing the tab around the cap using the same screwdriver.

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Step 5

Logitech UE MegaBoom 3 Passive Radiator Replacement: step 5, image 3 of 3

With the cap removed, using Phillips #0 screwdriver remove all four 2.0 mm screws to take off the control board.
Now you can replace the power button control board.

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Step 6 Passive Radiator

Logitech UE MegaBoom 3 Passive Radiator Replacement, Passive Radiator: step 6, image 1 of 2

Logitech UE MegaBoom 3 Passive Radiator Replacement, Passive Radiator: step 6, image 2 of 2

Take off the metal rods by gently prying them out using the metal spudgers
Be sure to slide them out as gently as possible to prevent the rods from becoming damaged.

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Step 7

One the rods are removed you can pry it off and disconnect the passive radiator.
Repeat the same steps to disconnect the passive radiator on the other side of the speaker.

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