Speaker Set-Up: Use of a Plumb Bob

It's important that both loudspeakers are the same, but whether that's straight up or titled forward/back depends upon the design, your room and your listening chair height. Most loudspeakers give their smoothest response only within a small range of the vertical axis. Look at the graphs in a Stereophile review to see examples. You usually want to tilt your loudspeakers so that you're within that range. The sonic effect can be very noticeable.

Thanks Onhwy61. I tilt my speakers slightly forward to reduce the vertical off-axis angle. However, I'm kinda curious about the speakers vertical configuration. My basement floor is not even. So, when checked with a bubble level, the left speak is pretty close to being 90 degrees true. By contrast, the right speaker required me to shim up one side in order to be true.

I guess the question is whether this is another issue to obsess about.

"I tilt my speakers slightly forward to reduce the vertical off-axis angle."

What are the before and after measurements of the vert off axis angle?