why are they non returnable?

Metra 72-8104 Speaker Connector for Select Toyota Vehicles This connector does not fit Toyota Venza. Why I cannot return?

what is the average life span of these speakers?

7+ YEARS STRONG! I purchased these back in December of 2013 in college. Speakers have moved around over 10 times, but I kept the original box for moving purposes. Finally purchased a home and these still remain as my main TV speakers. I recommend this set of speakers for anyone who wants that movie theater and thrilling music experience in their own home!

How does one extend the cable of the control speaker with the 15 pin vga cable? a regular vga cable extension didn't work.

The problem with most all VGA Extension cables is that they tie pins 6,7,8 and 10 to the casing (GND). This is fine for a VGA Cable, but is not desired for an extension cable. It does not work in extending the right control speaker. Instead, go with the Amphenol Cable Extension that wires the pins straight through. Lengths are available in 5', 10', 15' and 25'. Just change the last two digits when looking for your desired length. CS-DSDHD15MF0-005 Length: 5' CS-DSDHD15MF0-010 Length: 10' CS-DSDHD15MF0-015 Length: 15' CS-DSDHD15MF0-025 Length: 25' Be sure to get a Male to Female connectors.

Recommended Uses For Product	For Computers, For Televisions
Compatible Devices	Television
Surround Sound Channel Configuration	2.1
Item Weight	8.2 Kilograms
Is Waterproof	False
Speaker Size	3.5 Millimeters
Batteries	1 Lithium Ion batteries required.
Item model number	980-000402
Is Discontinued By Manufacturer	No
Speaker Count	2
Output Wattage	200 Watts
Processor Count	2
Wattage	200 W

Logitech Z623 980-000402 200 Watt Speaker System (Black) [並行輸入品]

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