Adcom GTP-450 (1993)
A stereo tuner preamplifier from Adcom, released in 1993 with a design intended to pair with high-current power amplifiers.
Overview
The Adcom GTP-450 is a stereo tuner preamplifier manufactured by Adcom and released in 1993. It functions as both a preamp and an AM/FM tuner, designed to serve as a central control unit in a high-fidelity audio system. The unit was engineered to work in tandem with Adcom's high-current power amplifiers, making it a common pairing in enthusiast setups of the era. One owner described their system, which paired the GTP-450 with a Carver TFM-20 power amp, indicating its use in serious audio configurations. Though detailed performance reviews are sparse, it has been described as "serious audio equipment" and appears in multiple user systems from the 1990s and beyond.
Specifications
| Product type | Tuner Preamplifier |
| Production year | 1993 |
| Original price | $500 |
| Frequency response | 20Hz to 20kHz |
| Output impedance | Main Outputs 475 ohms, Tape Outputs 500 ohms |
| Output Level (Rated) | 1.0V |
| Input impedance | 25 |
| Dimensions | 76 x 432 x 292mm |
| Weight | 6.3kg |
| Voltage | 110/120V |
| Power | 20W |
Design
The GTP-450 was engineered as an ideal match for Adcom high-current power amplifiers, suggesting a design focus on signal integrity and system synergy.
Market
The GTP-450 has appeared in the used market with prices ranging from $20 for individual preamps to $175 for complete original-owner setups including amplifiers and remotes. A 2020 listing suggested a value of $200, and a service manual is available for download, supporting long-term usability.
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