You can't have too many bass traps...

Subs. You can't have too many subs.

Nope.

It does take considerable amount of bass traps to improve an enclosed space. If you are unwilling/unable to use EQ you'll need more to get a perfect room, but yes, you can over-dampen not just the bass, but the mid/treble as well.

4 of the GIK acoustics Soffit Traps are a good start for a modest room. 
Best,
E

The trick with bass traps, gentle readers, is knowing exactly where they should go. It helps to have a method to determine the exact location of the standing waves in the room, a test tone and SPL meter or even an empty shoebox will alert you to the standing wave while a test tone is playing by vibrating in the presence of the standing wave. As it turns out sometimes the bass trap should be placed a foot or two away from the room corner. If one puts bass traps around willy nilly without measuring it’s very possible to degrade the sound, fair warning ⚠️ You feel invincible, like the more tube traps the better the sound! 🤗

YES!!

Well you can accidentally kill yourself by drinking too much of something as seemingly innocuous as water, so I’m guessing answer to question is no, as it is 99.999% of time with absolute questions of the sort ; )

Systems-you can’t have too many separate music systems!