firstly, i want to state that this is NOT a problem with the volume fluctuating up and down as is the commonly reported problem/complaint with this speaker model. that problem has been fixed on my set. its the speakers (all of the 5 satellites) no longer sounding as loud as before and i have to crank up the volume to max to get sounds to be audible.
i have opened up the front right control speaker and checked the variable resistor volume knob with a multimeter. the resistance changes normally.
tested the speakers on another pc and its still not loud as before. also tested the speakers on my mp3 player with the mp3 player's volume at max but still not as loud as before. plugged in my earphones and got my ears blasted by music. so i've ruled out any fault with the motherboard's sound card or mp3 player audio jack.
all of the three audio jack input male connectors on the speaker system are shiny and not tarnished.
the external power brick for the unit is 230V ~ 50Hz 550mA for the input and 13.5V ~ 5000mA for the output. do note that this unit uses ac for the output as evidenced by the ~ symbol for the output rating. so the power brick is more like a step down transformer rather than an ac-dc adapter as is common with most other speaker power adapters. i pulled out the power plug from the amp/subwoofer and measured the output voltage when not connected to the amp/subwoofer using a multimeter. the reading was 15.2V AC. hmm, bad power brick going out of spec?
i've also tried to measure the resistance/impedence of the satellite speakers using a multimeter. the satellite speakers all measure 5.5 Ohms except for the center which measured 8.5 Ohms.
i also tried to measure the resistance/impedence of the whole unit via the power input jack like in the logitech z506 thread but i was unable to get a reading via the power input jack even though i was making good contact with the terminals. the multimeter kept saying the resistance/impedence was infinite regardless of the max resistance measurement setting of the multimeter. might have something to do with the fact that the unit requires ac input as opposed to dc input on the other speaker system? or am i measuring it at the wrong place? should i be measuring it at the audio jack instead?
so what can i do to fix this speaker system? bad power brick? or are the caps in the subwoofer/amp failing? i would hate to have to buy new speakers as the local retailers here have got a crappy selection of surround sound pc speaker systems. the only one they carry in abundant quantities is the logitech z506 which is utter crappily designed power supply wise.
thanks for reading my grandfather's speaker's story.
i have opened up the front right control speaker and checked the variable resistor volume knob with a multimeter. the resistance changes normally.
tested the speakers on another pc and its still not loud as before. also tested the speakers on my mp3 player with the mp3 player's volume at max but still not as loud as before. plugged in my earphones and got my ears blasted by music. so i've ruled out any fault with the motherboard's sound card or mp3 player audio jack.
all of the three audio jack input male connectors on the speaker system are shiny and not tarnished.
the external power brick for the unit is 230V ~ 50Hz 550mA for the input and 13.5V ~ 5000mA for the output. do note that this unit uses ac for the output as evidenced by the ~ symbol for the output rating. so the power brick is more like a step down transformer rather than an ac-dc adapter as is common with most other speaker power adapters. i pulled out the power plug from the amp/subwoofer and measured the output voltage when not connected to the amp/subwoofer using a multimeter. the reading was 15.2V AC. hmm, bad power brick going out of spec?
i've also tried to measure the resistance/impedence of the satellite speakers using a multimeter. the satellite speakers all measure 5.5 Ohms except for the center which measured 8.5 Ohms.
i also tried to measure the resistance/impedence of the whole unit via the power input jack like in the logitech z506 thread but i was unable to get a reading via the power input jack even though i was making good contact with the terminals. the multimeter kept saying the resistance/impedence was infinite regardless of the max resistance measurement setting of the multimeter. might have something to do with the fact that the unit requires ac input as opposed to dc input on the other speaker system? or am i measuring it at the wrong place? should i be measuring it at the audio jack instead?
so what can i do to fix this speaker system? bad power brick? or are the caps in the subwoofer/amp failing? i would hate to have to buy new speakers as the local retailers here have got a crappy selection of surround sound pc speaker systems. the only one they carry in abundant quantities is the logitech z506 which is utter crappily designed power supply wise.
thanks for reading my grandfather's speaker's story.
what did we say about hoarding too much stuff and depriving others of them?! *cough* socialism *cough* lol! 
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