Unlike most CD players, the DX-7500 has a front-panel volume control for its variable analog outputs as well as the headphone jack.
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The manual warns that recording on a cassette deck from the direct outputs may result in "beat" sounds on the tape similar to those sometimes experienced when recording from an fm tuner with inadequate ultrasonic filtering. The direct output bypasses the player's analog filtering, minimizing the circuitry between its d/a converters and the system amplifier. The rear of the DX-7500 has three pairs of analog output jacks, identified as fixed, variable, and direct. It also provides direct keypad access to any numbered track.
The player has a shuffle-play mode, in which all the tracks on a disc are played back in a random order. The memory system can be programmed to play up to twenty tracks of a CD in any order, and a Memory Edit feature allows the program to be modified at any time. When you're copying a CD, this feature automatically puts the player into pause mode at the end of the tape's first side to allow the cassette to be turned over. Besides the usual operating functions, including repeat of a track, disc, or any selected portion, it has a Time Editing feature that determines how many tracks can be accommodated on each side of a tape cassette. In addition to its internal sophistication, the DX-7500 offers almost every feature one could hope to find in a CD player. The analog audio outputs are supplemented by two digital outputs (electrical and optical) for use with an external d/a converter. Optical coupling between the digital and analog circuitry of the DX-7500 eliminates the possibility that digital signals could leak into the analog sections and degrade the output quality. Onkyo's Opto-Drive system is claimed to completely eliminate any electromagnetic interference from the outputs of the d/a converters by using phototransistors instead of diodes to regulate the power-supply voltage to the converters. The player also makes extensive use of optical signal transmission and isolation techniques. It features dual 18-bit digital-to-analog (d/a) converters with eight-times oversampling (at 352.8 kHz). The Onkyo DX-7500 is a full-featured CD player incorporating the latest digital technology, but it is priced just above a typical midrange player.
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