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Originally Posted by Xtraheadroom
Thanks all. Looks like I have some shopping to do. Any recommendations?
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Whatever you set your amps on will change how they sound. The goal is to avert the influence of floor borne vibration from entering into the amp and to provide a path for internal vibration (energy) to 'do work', to use itself up, turning into heat. Ideally you want to redluce the resonance frequency of the amp to a point below where its effect is outside the audible range.
The vast majority of inexpensive amp stands will get your equipment off the floor but are not designed to do any real resonance control or vibration mitigation and, more likely than not, they will add coloration in one form or another.
You will likely hear a difference in sound so you will find that amp stands have an effect -- whether that reveals a more realistic sound, more of what the equipment designer intended or not is the question.
If you want an effective amp stand, its design intent should be in line with the goals laid out above. Most manufacturers will claim their product reduces vibration. Make them prove it to you.
Serious brands include Harmonic Resolution Systems (HRS), Critical Mass Systems (CMS) and my favorite, Silent Running Audio (SRA).
These issues are discussed in this review:
Silent Running Audio – Virginia-Class Reference isoBASE