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   [Singapore] HIFI Equipment (Buy/Sell)
   Accuphase A-200 A70 A47 ISSE 2016
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   Author  Topic: Accuphase A-200 A70 A47 ISSE 2016  
Audioline Singapore

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Von Schweikert Audio & KR Audio
   

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Accuphase A-200 A70 A47 ISSE 2016
« on: November 19th, 2016, 11:11pm »

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Representing Brands (Singapore & Malaysia)
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Accuphase A-200
Recommended Retail Price: SGD$48,600.00



The A-200 encompasses Accuphase power amplifier know-how to the fullest. It is destined to become another milestone, taking the art of audio to the next level. In order to realize ideal speaker drive capability, the A-200 employs a structural design that exceeds even the M-6000. Two completely separate power amplifier units, each with its own dedicated heat sink on either side of the chassis, are driven in parallel.

Another outstanding characteristic of the A-200 is its enormously improved S/N ratio. By adopting the advanced instrumentation amplifier principle for the input stage in a double configuration, using only discrete electronic components instead of ICs, and fine-tuning the gain complement with the following stage, simply amazing S/N ratings were achieved: 126 dB at the maximum gain setting and 132 dB with gain set to –12 dB. These represent ultimate values even in the formidable Accuphase lineup.

- Pure Class A operation delivers 100 watts of quality power into 8 ohms
- Two totally identical power amplifier units driven in parallel
- 20-parallel push-pull arrangement of MOS-FET devices in output stage delivers linear high power progression to ultra-low 1-ohm impedance
- Input section configured as double instrumentation amplifier
- Double MCS+ circuit and current feedback topology in amplification stage
- Support for bridged use of two A-200 units with even higher output power
- Strong power supply with massive high-efficiency toroidal transformer and large filtering capacitors

http://www.accuphase.com/model/a-200.html

Accuphase A-70
Recommended Retail Price: SGD$21,400.00



Inheriting many outstanding technology features of the A-200, the A-70 represents a full model change from the A-65, ready to take its place as the ultimate pure class A stereo power amplifier. While reflecting this tradition, the A-70 also implements latest technology such as the ultra low-noise instrumentation amplifier principle realized in a discrete configuration, along with optimized signal input and power amplification stages, resulting in an astonishing 127 dB S/N ratio (at -12 dB gain), surpassing even the formidable earlier Accuphase stereo amplifier lineup.
The output stage of the A-70 features power MOS-FETs renowned for their excellent frequency response, sonic performance, and superior reliability. In the output circuitry, ultra-heavy-gauge edgewise coils with a surface area more than three times larger than conventional units, combined with MOS-FET switches are used in place of relays, to eliminate mechanical contacts and improve long-term reliability. Top-grade materials, sophisticated circuit pattern technology, and various other measures result in low impedance and enable the realization of a damping factor of 800, which represents a two-fold improvement over the A-65.

- Pure Class A operation delivers quality power: 60 watts x 2 into 8 ohms
- Power MOS-FET output stage features 10-parallel push-pull configuration and delivers linear high power progression to ultra-low 1-ohm impedances
- Ultra low-noise instrumentation amplifier principle used in input stage
- Amplification stage implements further evolved MCS+ topology
- Current feedback principle combines stable operation with outstanding sound quality
- Bridged connection mode allows upgrading to monophonic amplifier
- Two selectable meter types: digital power meters showing true power values and bar graph indicators

http://www.accuphase.com/model/a-70.html

Accuphase A-47 CLASS-A 45W/ch STEREO POWER AMPLIFIER
Recommended Retail Price: SGD$12,300.00



The A-47 is a successor model to the A-46, based on the design technology developed for higher-ranked models. It is a full-fledged Pure Class A Stereo Amplifier that produces truly captivating sound.
The output stage of the A-47 uses high-performance power MOS-FETs ideal for audio applications. For each channel, six devices are arranged in a parallel push-pull Pure Class A arrangement. This results in very low output impedance, ensuring that constant drive voltage is available also for low-impedance loads. Superior performance is evident from the linear power progression of 45 watts into 8 ohms, 90 watts into 4 ohms, and 180 watts into 2 ohms. The amplifier is even capable of driving ultra-low 1-ohm impedances with an amazing 360 watts (music signals only).
The input stage circuitry is configured as an instrumentation amplifier. This approach makes it possible to achieve fully balanced signal paths, extending from the signal input all the way to the final power amp stage.
Using the A-47 in bridged mode creates a mono amplifier with even more impressive power output capability, rated for 180 watts into 8 ohms, 360 watts into 4 ohms, and 720 watts into 2 ohms (music signals only).

- Pure Class A operation delivers quality power: 45 watts x 2 into 8 ohms
- Power MOS-FET output stage features 6-parallel push-pull configuration
- Instrumentation amplifier principle used in amplification stage
- Further evolved MCS+ circuit topology
- Current feedback principle combines stable operation with outstanding sound quality
- Bridged connection mode allows upgrading to monophonic amplifier
- Large high-efficiency toroidal power transformer
- 4-stage gain control

http://www.accuphase.com/model/a-47.html

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