Only tinny sound coming from the speaker MS904

Hi
Try this.
Hold Down Power: Many Bluetooth speakers switch into pairing mode by turning the speaker off, then turning the device on while keeping your finger depressed on the power button. To notify you the speaker is in pairing mode, it will typically emit a sound or its light indicator will begin flashing rapidly.
Hold Down Pairing Button: Some Bluetooth speakers have a dedicated button for placing your device into pairing mode. Seek out a button on your device with the Bluetooth symbol next to it, then hold it until you hear your speaker emit a sound or its light indicator begins flashing rapidly.
your Bluetooth speaker now discoverable, it can be paired to your iPhone or Android phone.
Quick Pairing Instructions

1. Open Settings.
2. Open Wireless and Network.
3. Open Bluetooth® Settings.
4. Turn Bluetooth® on if it is off.
5. Touch Search for Devices.
6. Touch and hold - UGO.
7. Touch Connect.

Without knowing what they're hooked up too.. SOUNDS like your uder powering them, OR over powering them. Look at the back of the speakers the wattage is what your looking for, look at your amp, example: 1000w speaker running on 50w amp = not good.

A few questions to help me help you: (1) Does the woofer cone move freely when you use your hands to move it (or do you feel friction)? (2) have you tried swapping the left speaker for the right to rule out the receiver as a cause?

It sounds like the woofer part of the speaker is bad, while the tweeter is still good. You are going to have to replace the speaker. Speakers are generally sold in pairs, so it would be best to replace both rear speakers at the same time.

LOL. This is a common, easily solveable problem. Remove your cellphone or anything that emits radiation of any sort from the general area. Don't believe me? send a text message while sitting net to your speakers. It does this even if you arent sending a message because your phone sends intermittent signals to the cell tower. the radiation being emitted from the phone does weird things with the magnets inside the speakers.

Buy yourself some stand alone speakers, a base & two side speakers, they cheap these days, base speaker has buit in amplifier & plugs into mains, or get surround sound 5speakers & a base, again mains powered, loud enough to annoy neighbours on full. Built in monitor speakers are renowned feeble tinny sounds. Right click speaker icon, bottom right, on your desktop toolbar, open volume control, ensure volume sliders set to max.

Maybe your microphone is on and giving feedack of what it hears. Try disconnecting it and let us know what it did. Also once a pair of headphones ( believe or not ) cted like weak microphones. When you tapped them, big speakers made the sound. There was a dual plug for both large speakers and headphones to be connected to the green sound out. Anyway, tell us what it did after you disconnected the mic.

Playing records is a contact sport.

Since the needle touches the record -- as opposed to a laser reading a CD -- any bit of dust or mold translates to annoying pops and hisses.

Record cleaners get down into the record grooves to extract dust and particles.

Or you may need a new needle.

yes of corz,, u can use any of that but dont go pass the power of your power amp,, becoz,, it coss damage 2 your speakers,, and thats expensive... ps. . dont revers the polarity