Price: $165 per panel

Website: www.gikacoustics.com

Howard said: GIK Acoustics’ 2A Alpha panels improved my room’s acoustics, were easy to set up, look fantastic, and cost a heck of a lot less than that new amplifier I just bought.

Reviewers' Choice

Read the SoundStage! Ultra review.

The gist: Great bang for the buck in terms of sound-quality improvement.