can i use digital audio cable in place of the regular speaker wire I got with my speakers?

[Can You Help Me Please]

I'm using these for PC. I own a pair of Technical Pro 5000's. I notice when loud sound plays for a long period of time, the left speaker volume decreases and I need to readjust the speaker wire attached to it. I've heard something about people using babana plugs for a better connection. I am all new to this so please be polite. I am a bedroom DJ so I need sound to be as clear and level as possible during recording and playback.

 

[americanaudiophile]

No you can't use a digital audio cable unless your speakers are self powered and have a digital audio input. In that case your amps would be useless.
Banana plugs won't make a better connection (just a more convenient one if you connect and disconnect your amp and speakers).
Make sure that the wire is connected to the speaker firmly with no bare wire possibly shorting plus to minus.
You could have a bad speaker cable or problem in the speakers. Try exchanging the left and right speaker cables. If the problem follows the speaker wire then replace it. If not then there may be a bad connection in the left speaker.
It's odd that it happens after loud volume for a long time. Could there be a thermal cutoff in the speaker to protect it from damage? Could the amp channel be overheating?