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Quad Elite QSP Stereo Power Amplifier 購入

昨年 11月に 以前利用したことのある Shop から DM が届いて以来 、Quad の Power Amplifier が気になっていました。

で、ここにきて急な円高になりましたので 思い切って小型の Quad Elite QSP Stereo Power Amplifier を ポチッ ・・・ (^^ゞ


当初は QUAD Artera Stereo Power Amplifier が欲しかったのですが、電源電圧の関係で Quad Elite QSP Stereo Power Amplifier に変更です。送料は £66.66 でした。

DM が届いたときは 186円/ポンド でしたが、 ポチッた時点では 168.6円/ポンド でした。 かなり安く買えたことになります。 円高が進みそうなので もう少し待った方が良いのかもしれませんが、欲しい時が何より一番です。



The QSP Stereo Power Amplifier is a by-product of the famed Quad 909 Stereo. This product was designed in keeping with the traditional built of QUAD Power Amplifiers, but is right up with the latest technology and the finest audiophile components available. With 140W per channel into an 8 ohm load, and plenty more into lower impedances ensures that there is ample power into a wide range of speakers, including the QUAD ESL range.

Current Dumping

The QSP Amplifier incorporates QUAD's patented current dumping technology developed by QUAD's founder Peter Walker , and is one of the finest audio amplifiers available. One of the few truly innovative amplifier topologies, it is essentially a combination of two amplifiers to give the best of both in each channel. The current dumping circuit like the Quad QSP Amplifier consists of a very high quality class A low-power amp which provides the details of the signal, while a high-power current dumping section provides the grip to keep the speakers under control.

These two amplifier circuits are combined with a precision network to perfectly impose the finesse of the class A output onto the power of the current dumper.

This technology eliminates the problems of crossover distortion, quiescent current adjustment, thermal tracking and transistor matching. There are no internal adjustments or alignments and the choice of power transistor types is less restrictive.


Model Name QSP

Power Output 2 x 140W into 8Ω (<0.01% THD at 1kHz)

Total Harmonic <0.004% (100W at 1kHz)

Distortion (THD) <0.025% (100W at 20Hz - 20kHz)

Output Impedance 0.05Ω in parallel with 1.5mH

Frequency Response -1.0dB at 1Hz and 55kHz, ref. 1kHz

Power Response -0.25dB at 20Hz and 20kHz, ref. 1kHz

Input Sensitivity 760mV (RCA line input)

Input Impedance 10kΩ (balanced)

15kΩ (unbalanced)

Crosstalk -90dB at 1kHz (input loaded with 600Ω)

Signal-to-Noise Ratio (ref. 140 Watts) 108dB (20kHz measurement bandwidth)

Stability Unconditional with any load and input

Power Requirements 230V~50-60Hz 115V~50-60Hz 100V~50-60Hz

Standard Accessories Power cord, User manual, Warranty Card, Ampbus cable

Dimensions (W × H × D) 328 × 149 × 270 (mm)

Net Weight 12.5kg

Gross Weight 14kg

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