SEO - Would many posts linking back to my homepage with the Homepage's focus keyword be considered spammy?

Morning All,

In an attempt to make my homepage rank for the keyword "AA Speakers", almost every post on my website contains a link back to my homepage with "AA Speakers".  Totally duplicated content, I understand, but if you look at an example post (of which i have over 6000), you can see that the content is really the recording and whatever comments visitors make (e.g., http://www.recoveryaudio.org/aa-speaker-tapes/tom-i-steps-12-primm-nv-2007-12-07.

Would a few thousand instances of posts linking the focus keyword back to my homepage be considered spammy?

By the way, I might be interested in hiring someone in helping me make modifications to the site in order to capture the #1 ranking for AA Speakers (currently #3).  It already holds over 150 #1 keyword rankings, but I can't seem to get the most valuable keyword above #3 (and this site is far superior to #1 & 2 in terms of usability and content)