The name Joseph Grado is certainly not new to the transducer field, but the HP 1 is his first entry into the headphone market. The HP 1s are billed as "Professional Recording Monitor Headphones," and Grado is clearly targeting professional recording engineers and equipment designers in need of an accurate monitoring tool. Joe's designs, whether they be phono cartridges or tonearms, have never been ho-hum also-rans when compared to their competition. His products have invariably shown unique design ingenuity, often radically departing from accepted practice. His Signature Tonearm (the last such product he made, now discontinued), which I still use as a reference, is a case in point. The HP 1 headphones are no exception, being rather unusual in design, physical appearance, and construction.
In recent years, Adcom has carved an enviable niche for themselves in the entry-level category of high-end audio. Their excellent GTP-400 tuner/preamplifier, which I reviewed in September 1989 (Vol.12 No.9), has further enhanced their reputation for musically satisfying sound at affordable prices. The GFP-565 is Adcom's newest preamplifier and their most expensive to date. The GFP-565 was designed to offer more than simply excellent performance for the price asked. This new arrival is Adcom's attempt at manufacturing a preamplifier which can compare favorably to the most expensive state-of-the-art products offered by other high-end manufacturers. As such, its $798 price tag is still reasonable, especially when the 565 is compared with other preamps in the under-$1000 price range.