6 horn nathan set-up

i was looking on ebay and i found this listing for a WABCO AA-2. as i read through the listing i saw that he said that his friend has a 6 HORN NATHAN SET-UP …he even states that his WABCO HORN is louder than his friends 6 HORN NATHAN SET-UP

http://cgi.ebay.com/AMTRAK-or-WABCO-CAST-IRON-TRAIN-HORN-MORE_W0QQitemZ120389286588QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item120389286588&_trksid=p3286.c0.m14&_trkparms=66%3A2|65%3A10|39%3A1|240%3A1318