Best prices on Mtx in Stereo Speakers & Headphones. Check out BizRate for great deals on Stereo Speakers & Headphones from MTX, Musica and Soundolier. Use BizRate's latest online shopping features to compare prices for Mtx. Read product specifications, calculate tax and shipping charges, sort your results, and buy Electronics with confidence. Easily narrow your search and find the product that's perfect for you: MTX ThunderPro2 Speaker - MTX Model HT2625W Dual 6.5in 2-Way In-Wall Video Shielded Center Channel Speaker, each.