This is a reprint of a very rare speaker Ad! It is the elusive Quantum Reference Speaker. At $6,500 in 1978, it was built as a reference speaker bu t was sought after by collectors and audiophiles. It was almost 6 feet tall and had ribbon technology, very rare for its time! This is an awesome picture and nice article with specs for the beast. This one also incorporates the Quantum 5 with EMIT tweeter technology.-This is a an exact re-print of a classic Audio Advertisement.-Each page is 8.5" by 11"-Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship!-As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund!-Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eCRATER . List your items fast and easy and manage your active items.