A/B testing of direct signal and miked loudspeaker. The answer is that A=original direct signal, B=Miked speakers. However I had expected a much bigger difference between these signals.

My speaker went out. The power supply is making a noise. The red and green LED lights blink on and off.

Comments:

Hello Danny, did you solve it. I have the same issue. Only blinks the light but no sound! thank you!

Sorry for the delay in responding. I bought a power supply from http://www.fullcompass.com. I ended up calling them to get the right part number. I put it in today and it sounds great. The red and green lights turn on with the power and the green light stays lit. Before the red light would blink.

EUROLIVE B210D Active PA Speaker System
https://www.youtube.com/watch?v=1mkhO5rzcHI

In this short video we explore the EUROLIVE B210D Powered PA Speakers.

These active 200-Watt 2-way speakers have a 10″ woofer, 1.35″ compression driver, switch mode power supply and an integrated sound processor for system control and sound protection.

BEHRINGER EUROLIVE b110d vs b210d speaker review
https://www.youtube.com/watch?v=LBilA1_lCjU

Troubleshooting Active SpeakersI have recently come across a rather good set of active speakers – a wooden case, high quality loudspeakers, a built-in frequency corrector. But, when turned on, they produced a weird sound. Let’s open them up and see what the problem is. Inside we can see the amplifier itself that feeds the transformer, an active frequency corrector and a separation filter for the speakers. Even without special equipment we can see an inflated component, the function of which isn’t clear.

Let’s try to remove the inflated components and see what comes out of it. Nothing changed, so the problem definitely lies here. Let’s replace the capacitor with a new working one and turn our amplifier on. The background noise is gone.

Teardown of an Alesis M1 Active 520USB Studio Monitor speaker

Repair of M-Audio Studiophile AV 40 Speakers
https://www.youtube.com/watch?v=i7NveHRgYsI

In this video I investigate a failure in the internal electronics (the power supply section) of the M-Audio Studiophile AV 40 Speakers.
Watch it until the end to find out what was the faulty component and what caused an additional damage which normally shouldn’t occur.

Repairing a KRK Rokit 6 powered near field studio monitor speaker.
You won’t believe what caused the fault!