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Grouping and Logical OR: notebook (ibm or sony) Negation: laserjet printer not monochrome Negation: printer -laser -monochrome \tGrouping and Logical OR: printer (epson or canon) (inkjet or laser) not multifunction Group Operator: printer -(dot matrix)
AH-C751 Stereo Earphone which feature Denons acoustic optimizer technology that balances internal sound pressure for optimum fidelity without coloration. The machined aluminum housing ensures neutral balanced tonal response with extended range (12 Hz-24 kHz) and the drive units feature highly efficient neodymium magnet systems along with large 11mm diaphragms for optimum efficiency (104 dB/mW) and extended portable player battery life.