​​​Original vintage ad for KLH RESEARCH DEVELOPMENT CORPORATION.  Model Seventeen speaker will make us eat our words.  This speaker delivers a quality of performance we believed unattainable at a price we considered impossible just three years ago.  It is at your KLH dealer now.  Bon appetit.
Main office was located at 30 Cross Street, Cambridge, MA.
This unique old one page 1964 high fidelity stereo equipment component trade magazine advertisement would display beautifully matted and framed.  It would make a nice accompaniment to your vintage stereo.