Quad 909 power amp - Black
The 909 Stereo power amplifiers incorporate Quad's patented current dumping technology and is one of the finest audio amplifiers available today. The current dumping technique eliminates many of the problems associated with transistor amplifiers giving a consistent and predictable performance without a need for the fine tuning adjustments on the production line. In current dumping amplifiers there is a very high quality low power output amplifier and a very high power output amplifier whose performance is not critical. This high power output amplifier controls the loudspeaker at all times and provides the current or "muscle" to generate the sound. The low power output amplifier is arranged to generate a signal that compensates for errors between the input signal and the signal fed to the loudspeakers. The result is that the quality and accuracy of the output signal depends only upon the performance of the low power amplifier. In the 909 this low power output amplifier has been engineered to the highest standards. The problems of crossover distortion; quiescent current adjustment; thermal tracking and transistor matching all disappear. If such a thing as a perfect amplifier were to exist, then the 909 would be very close to that perfection.
>**** Unit is new in it's factory sealed box!
**** All the originals included: manual, & IEC
**** Pair with the 99 CDP2 Player for a perfect 2 peice system (no preamp needed!!)
**** Please feel free to contact me with any questions.
Maximum Power Output: 140WRMS (8ohms), 250WRMS (4ohms)
Maximum Output Current: 11 Amps peak each channel
Total Harmonic Distortion: 0.02% (100W into 8Ohms; 20Hz - 20kHz)
Input Sensitivity (phono): 775mV
Output Impedance: 1.5uH parallel with 0.05 Ohms
DC Offset Voltage: less than 10mV
Frequency Response: 13Hz to 40kHz (+0dB/-1dB)
Crosstalk at 1kHz: -90dB at 1kHz
Signal to Noise ratio (70W): 108dB (20Hz to 20kHz)
Dimensions (H x W x D): 5.5" x 12.5" x 9.5"
** Double boxed for shipping. Manual, IEC and Quad link cable are included.
** PayPal accepted with no additional.
** Free shipping!
** Feel free to contact me if you have any further questions.