ALVA DUO

MOVING COIL & MOVING MAGNET PHONO PREAMPLIFIER

Squeeze every inch of detail from your record collection with our highest quality moving magnet and moving coil phono stage, with integrated headphone amp; the Duo Phono Preamplifier.

从您的黑胶唱片集中采出每一寸的细节。这就是我们最高品质的 MM / MC 唱头放大器连耳扩 ; Duo 唱头放大器。

VINYL AS IT’S SUPPOSED TO SOUND

Whether you’re dusting off your record collection or embracing analogue through the vinyl revival, there’s a unique experience to be had from the moment you drop the needle on your favourite album. To preserve the unique warmth of the vinyl sound, the Duo phono preamplifier has been carefully designed with a state-of-the-art switch mode power supply and a new surface mounted circuit board layout to reduce unwanted noise.

黑胶，最源始的音乐

无论您是通过黑胶唱片丰富您的唱片集还是欣赏模拟音乐，您都会期待每次落针的那一刻。为了保持您能得到温暖独特的黑胶声音，Duo 唱机前置放大器经过精心设计，配备了最先进的开关式电源供应器和新的表面贴装技术来制作电路板，从而减少不必要的噪音。

WHY CHOOSE A DEDICATED PHONO PREAMPLIFIER?

Due to the low-level signals created by a turntable, not all hi-fi amplifiers will let you connect directly to a record player. The phono preamplifier boosts this signal to something a power amplifier can work with. The challenge at this stage though is that noise can easily be added.

This is why we’ve designed the Duo around exceptional components that deliver the warm and detailed sound that’s synonymous with vinyl, all without distorting the signal from your moving magnet cartridge turntable. The switch mode power supply improves performance by switching outside of audible frequency to drastically reduce hum and new circuit board layout uses surface-mount components to reduce noise.

为什么要使用专用的唱头放大器？

由于黑胶唱盘产生的信号通常非常弱，所以要把信号放大来说，唱头放大器是缺一不可的。一个独立的唱头放大器与其他内置在合并机内的低质量唱放相比，绝对具有明显的音质优势 – 因为这些唱放通常位于“嘈杂”的电子环境当中。

所以剑桥音响采用了最新的技术，以确保保持黑胶播放的传统，提供愉快“温暖”的声音，并呈现出前所未有的精确度。使用最先进的开关式电源供应器有助提高反应速度和精准度，而且还协助降低嗡嗡声的产生；新的线路板利用表面贴装技术(Surface Mount Technology)，保证令背景噪音降至最低。

VINYL. JUST FOR YOU.

Enjoy the warmth of vinyl privately thanks to Duo’s integrated headphone output. Uniquely, we integrated a 6.35mm headphone jack directly into the phono stage, so you can still enjoy your records when there’s no option to play out loud.

The integrated headphone output also means no need to turn on your amplifier just to power your headphones, resulting in a more eco-friendly listening experience.

黑胶。只为您。

由于 Duo 内置集成耳机输出，所以您可以独自享受黑胶带来的温暖。独一无二的是，我们将一个6.35毫米的耳机插孔直接加到我们的唱头放大器中，令您即使无法大声播放时，仍然可以欣赏您的黑胶唱片。

集成耳机输出也意味着无需打开放大器即可为耳机供电，从而提供更环保的聆听体验。

ATTENTION TO DETAIL

If some records in your collection are a little worse for wear, the subsonic filter will help to eliminate low frequency rumbles that can be caused by imperfections within your vinyl. Combine this with the balance control for handling potential cartridge imbalances in your record player (that can cause a difference between the left and right channels) and the result is a detailed experience with accurate soundstage.

着重于细节

如果您收藏中的某些黑胶唱片因播放久了而磨损以致质量变差，Subsonic Filter 将有助于消除低频的杂音。此将与平衡控制互相结合，可以处理系统内中潜在的唱头不平衡（可能导致左右声道之间存在差异），从而获得精确的声场体验。

ECO FRIENDLY

The Duo phono preamplifier is green at heart with less than half a watt standby power consumption and auto power down feature if the unit isn’t used after a 20 minute period. This in turn gives the unit the same worldwide voltage for compatibility wherever you are in the world.

环保

Duo 唱头放大器待机功耗低于半瓦，如果在20分钟后未使用该设备，则自动断电以便节能。无论您身在何处，这都可以支援全球电压。

Specifications
MAX POWER CONSUMPTION
10W

CARTRIDGE SUPPORT
Moving Magnet | Moving Coil

GAIN @ 1KHZ
MM: 39dB | MC: 60dB

NOMINAL OUTPUT
300mV

SENSITIVITY FOR NOMINAL OUTPUT
MM: 3.35mV | MC: 305uV

EQUIVALENT INPUT NOISE (A-WEIGHTED)
MM: ~0.09uV | MC: ~0.08uV

RIAA CURVE ACCURACY
+/- 0.3dB 30Hz-50Hz

SIGNAL TO NOISE RATIO GROUNDED INPUTS REF. 1V OUTPUT (20HZ-20KHZ BW)
MM: >90dB | MC: >70dB

THD+N 1KHZ (20-20KHZ BW)
MM: < 0.0025% | MC: < 0.20%

INPUT IMPEDANCE
MM: 47k Ohms | MC: 100 Ohms

INPUT CAPACITANCE
100pF

OVERLOAD MARGIN
>30dB

CROSSTALK @ 10KHZ
MM: >85dB | MC: 75dB

DIMENSIONS (H X W X D)
48 x 215 x 159 mm (1.9 x 8.5 x 6.2")

WEIGHT
0.95kg (2.1lbs)