The Quantum Reference Standard came out in approxmately '76 and was the first (to the best of my knowledge) to use the EMIT tweeter. They were (I think) a 4 way system @ $1200 new.
looking for older Infinity speakers
I am looking for an older pair of Infinity Quantum speakers with the first generation of Emit tweeter. Like the Qa,Qb, Qjr and so on. I would like to at least find a pair of Quantum Jr's or a better model, please email me with any info thanks [email protected]