You can Google them. Amp openers work well and are inexpensive.
Some amps have a small score line on the neck or a small painted dot. That indicates the weak side of the neck of the amp and makes it a snap to open. Place your thumbs opposite the weak side, put your index fingers on the other side and snap it open.
If your amps aren't marked or scored, defo opt for the amp opener.
There are 3 loves in my life: my wife, my English mastiffs, and my weightlifting....Man, my wife gets really pissed when I get the 3 confused...
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