You bet cha
I know that speakers are best to be placed on metal stands, and some would even fill the stands with sand to increase their weight for added stability. I just wonder–if we put some weights (thick books, sand bags, etc.) on top of the speakers (which are already on stands), would it helps too?
Absolutely !!! Its a good idea to put weight on TOP of a speaker, but....mass load it incrementally, until there seems to be little gain per increment of mass added.
I developed the idea of using concrete - patio paving units, in 2015 and 2016. Each patio paver weighs about 16 pounds, and they sell at Home Depot for $1.70 and at Lowes for $1.87 each. Start with ten, methodically ( incrementally) loading just one speaker, and compare it to your "stock" second speaker.
Read this AA thread I have posted to:
http://www.audioasylum.com/cgi/t.mpl?f=hug&m=177386
This , in many respects, besides being totally reversible, may be better than internally bracing the box, which is an amateur do-it-yourself
botch job, in
most cases I see.
Mass load the entire top of the enclosure.
You will hear better inner-detail, less distortion, less imtermodulation between drivers, and the box itself. You will obtain clearer diction, and typically more defined bass. Its the most needed, and cheapest improvement to a loudspeaker, I have ever experienced. Try it, initially under $20.00, and decide for yourself. It transformed my Fulton FMI 80s, and my ALTEC Voice of the Theatre speakers, as you will see in the above-referenced thread. I hope others will benefit from this..
Jeff Medwin