I tried a pair of attenuators for my amp just in case some kid wanted to hear how it sounds with the volume turned up full.
Unfortunately the attenuators seemed to be either badly made or I wasn't able to use enough force to get the RCAs in.
In the end I slackened the grub screw on the volume knob and either use the remote or just manually turn the spindle (after I've slid the volume pot off - better not say 'knob' again).
I suspect that a lot of modern amps are voiced that way to sound more powerful and impressive with just a small turn of the dial. Quite a few CD players have high gain too etc.
The cursed loudness wars seem to have drafted in some equipment manufacturers too.