NAD C 298 Stereo Power Amplifier (DU)

C 298

Stereo Power Amplifier

Redefining the State of the Art with Purifi Technology

NAD has introduced some of the most innovative amplifier technology in its nearly 50 year history, starting with the 3020 on through such cutting edge models as the 2200, the 208, and the M2. Now we are making the amazing new Eigentakt™ (self-clocking) technology, recently introduced to the world in the EISA Award winning Masters M33, available to a wider audience with the very affordable C 298. We are thrilled to provide this unprecedented level of performance. In short, a perfect companion for the C 658 BluOS Streaming DAC pre-amp.

璞丽科技重新定义艺术状态。

在近50年的历史中，NAD推出了一些最具创新性的功放技术，从3020开始到2200、208和M2等尖端型号。现在，我们将最新的Eigentakt™(self-clocking)技术，以及最近在获得EISA奖的Masters M33中向世界介绍的技术，通过价格低廉的C 298提供给更多的用户。我们很高兴能够提供这种前所未有的性能水平。简而言之，是C 658BluOS 流式DAC前级放大器的完美伴侣。

Powerful. Efficient. Eigentakt™

Amazing Flexibility

The C 298 may be a basic Power Amp, but we have carefully thought through all the use cases typically encountered to create a rich feature content. Selectable balanced inputs make the C 298 a natural for studio use or connection to High End Preamps and Processors. These inputs include a trim control useful for matching to other components. A line out allows further addition of power on the same channel for additional speakers or subwoofers. Auto-sense with selectable threshold is perfect for automating complex systems or hiding the amp out of sight in a cabinet. We even include a Ground Lug that can be very useful for eliminating ground loops and noise in complex multi-unit systems. Added to all this connectivity is a Bridge Switch that turns the C 298 into an amazingly powerful Monobloc Amplifier. Start with one and add a second C 298 later when you upgrade your speakers.

强大的。高效。Eigentakt™

惊人的灵活性

C 298可能是一个基本的功率放大器，但我们仔细考虑了所有通常遇到的使用案例，创造了丰富的功能内容。可选择的平衡输入使C 298自然而然地成为工作室使用或连接到高端前级放大器和处理器。这些输入包括一个微调控制，对匹配其他组件非常有用。线路输出允许在同一通道上为额外的扬声器或低音炮进一步增加功率。可选择阈值的自动感应功能是复杂系统自动化或将放大器隐藏在箱体中的完美选择。我们甚至包括了一个接地环，这对于消除复杂的多单元系统中的接地环和噪音是非常有用的。除了这些连接性之外，我们还提供了一个桥接开关，可以将C 298变成一个功能强大的单体放大器。先用一个，以后升级音箱时再增加第二个C 298。

Getting the Basics Right

It is surprising how many seemingly advanced products in the market today often miss many of the most basic requirements for satisfying performance. Low noise circuits, accurate channel balance, proper input and output impedance characteristics, high overload margins and stability with difficult speaker loads. NAD starts by getting these things precisely right and advances from there. Our line inputs, both Balanced and Single-ended, can accommodate all kinds of analog source components by offering ideal input impedance characteristics with linear ultra-low-noise buffer amplifiers to prevent any sonic degradation caused by inappropriate loading of the source device. These are all details you can hear.

掌握基础知识

令人惊讶的是，目前市场上许多看似先进的产品，往往忽略了许多最基本的要求，无法满足性能。低噪声电路、准确的通道平衡、适当的输入和输出阻抗特性、高过载裕度以及在困难的扬声器负载下的稳定性。NAD从这些方面入手，准确无误地完成了任务，并在此基础上不断进步。我们的线路输入，包括平衡和单端输入，通过提供理想的输入阻抗特性，配合线性超低噪声缓冲放大器，可以适应各种模拟信号源元件，以防止因信号源设备负载不当而造成的任何音质下降。这些都是你能听到的细节。

Sophisticated Power

NAD has moved away from the old fashioned and very power hungry linear power supplies and Class AB output stages that waste nearly half of the energy consumed producing heat rather than sound. Instead we have developed even better performing circuits based on switch mode power supplies and Class D output stages. Once thought to be inferior to traditional topologies, NAD’s advanced work in this area has created some of the best performing amplifiers regardless of basic design principle. These new designs are very linear over a wide bandwidth and provide consistent performance into all speaker loads, providing a dramatic advance over previous models.

The generously dimensioned power supply easily allows for 185 watts continuous and over 570 watts instantaneous power for short term musical transients. Innovative Asymmetrical Power-Drive fully utilizes every last watt available with its vast reserves of dynamic power available to accurately reproduce musical transients without distortion or compression. It can operate with any AC mains voltage from 100v to 240v and provides pure DC power to all the various stages of the C 298. This highly efficient supply also provides near perfect regulation of voltage across a wide range of conditions and provides a solid noise-free foundation for the amplifying stages.

精密的电源

NAD已经摆脱了老式的、非常耗电的线性电源和AB类输出级，它们浪费了近一半的能量，产生热量而不是声音。取而代之的是，我们已经开发出基于开关模式电源和D类输出级的性能更好的电路。NAD在这一领域的先进工作一度被认为不如传统拓扑结构，但无论基本设计原理如何，都创造了一些性能最好的放大器。这些新的设计在宽广的带宽上非常线性，并为所有扬声器负载提供一致的性能，比以前的型号有了巨大的进步。

宽大的电源供应器可以轻松地提供185瓦的连续功率和超过570瓦的瞬时功率，用于短期的音乐瞬态。创新的不对称电源驱动充分利用了每一瓦特，其巨大的动态功率储备可以准确地重现音乐的瞬态，而不会失真或压缩。它可以在100v至240v的任何交流电源电压下工作，并为C 298的所有不同阶段提供纯直流电源。这种高效的电源还能在广泛的条件下提供近乎完美的电压调节，并为放大级提供坚实的无噪音基础。

Purifi ‘Eigentakt’ Amplifier Technology

Purifi is a Danish technology company that has brought together several of the industry’s leading engineers to apply advanced mathematical modelling to solve the last remaining limitations of audio amplifiers. While there are many good sounding amplifiers on the market today, Purifi has taken a fresh look at every aspect of amplifier performance and found many seemingly small non-linearities that can make a dramatic difference in the overall sound. This return to first principles has resulted in a stunningly simple approach to some remarkably complex problems. With features and technology unmatched by other amplifiers in its class, the C 298 amplifier is an easy upgrade for any system and a surprising partner for the most sophisticated and advanced loudspeakers on the market.

焙乐道"Eigentakt"放大器技术。

Purifi是一家丹麦的技术公司，它汇集了多位业内顶尖的工程师，运用先进的数学模型来解决音频功放最后剩下的局限性。虽然目前市场上有很多好听的功放，但Purifi从新审视了功放性能的方方面面，发现了很多看似微小的非线性，却能让整体声音产生巨大的变化。这种对第一原则的回归，使一些非常复杂的问题得到了惊人的简单处理。C 298功放拥有其他同级功放无法比拟的功能和技术，是任何系统的轻松升级，也是市场上最复杂、最先进的扬声器的惊人搭档。

Features

• 185W x 2 Rated Output Power into 8 Ohms
• 340W x 2 Rated Output Power into 4 Ohms
• Stereo Dynamic Power 260/490/570W @ 8/4/2 Ohms
• 620W x 1 Rated Output into 8 Ohms Bridge Mode
• Mono Dynamic Power 1000/1100W @ 8/4 Ohms
• Purifi Eigentakt™ Amplifier Technology
• Balanced Line Inputs
• Single-Ended Line Inputs
• Input Level Control
• Line Output for Daisy Chaining
• 12V Trigger In/Out
• Auto Turn-on with Selectable Threshold
• IR In/Out
• Ground Lug
• Detachable AC Power Cord

特点

• 185W x 2额定输出功率到8欧姆。
• 340W x 2额定输出功率到4欧姆。
• 立体声动态功率260/490/570W @ 8/4/2欧姆
• 620W x 1额定输出到8欧姆桥式模式。
• 单声道动态功率1000/1100W @ 8/4欧姆
• 净化器Eigentakt™放大器技术
• 平衡线路输入
• 单端线路输入
• 输入电平控制
• 用于菊花串联的线路输出
• 12V 触发器输入/输出
• 自动开启，阈值可选
• 红外线输入/输出
• 接地片
• 可拆式AC电源线

ANALOG AUDIO INPUT/LINE OUT
THD (20 Hz – 20 kHz)
<0.0005 % at 2V out
Signal-to-Noise Ratio
>120 dB (IHF; 20 Hz – 20 kHz, ref. 2V out)
Channel separation
>110 dB (1 kHz)
>100 dB (10 kHz)
Input impedance (R and C)
Single-ended: 56 kohms + 280 pF
Balanced: 56 kohms +280 pF
Maximum input signal
>7.0 Vrms (ref. 0.1 % THD)
Output impedance
390 ohms
Frequency response
±0.1 dB (20 Hz – 20 kHz)
Maximum voltage output -IHF load
≥>7.0 V (ref. 0.1 % THD)

ANALOG AUDIO INPUT/SPEAKER OUT
Rated output power into 8 Ohms and 4 ohms (Stereo mode, ref. 20 Hz-20 kHz at
rated THD, both channels driven)
185 W at 8 ohms
340 W at 4 ohms
Rated output power into 8 Ohms
(Bridge mode, ref. 20 Hz-20 kHz
at rated THD, both channels driven)
620 W at 8 ohms
THD (20 Hz – 20 kHz)
<0.005 % (1 W to 185 W, 8 ohms and 4 ohms)
Signal-to-Noise Ratio
>98 dB (A-weighted, 500 mV input, ref. 1 W out in 8 ohms)
>120 dB (A-weighted, ref. 185 W out in 8 ohms)
Clipping power (Stereo mode, at 1 kHz 0.1 % THD)
>200 W
Clipping power (Bridge mode, at 1 kHz 0.1 % THD)
>690 W
IHF dynamic power (Stereo mode, at 1 kHz 1 % THD)
8 ohms: 260 W
4 ohms: 490 W
2 ohms: 570 W
IHF dynamic power (Bridge mode, at 1 kHz 1 % THD)
8 ohms: 1000 W
4 ohms: 1100 W
Peak output current
>25 A (in 1 ohm, 1 ms)
Damping factor
>800 (ref. 8 ohms 20 Hz – 6.5 kHz)
Frequency response
±0.2 dB (20 Hz – 20 kHz)
-3 dB at 60 kHz
Channel separation
>100 dB (1 kHz)
>80 dB (10 kHz)
Stereo Mode input sensitivity (for 185 W in 8 ohms)
Fixed Gain mode: 1.43 V
Stereo Mode Gain
Fixed Gain mode: 28.6 dB
Line In – Balanced and Single-ended
Variable Gain mode: 8.5 dB – 28.5 dB
Bridge Mode Sensitivity
Fixed Gain mode: 3.78 V for 620 W in 8 ohms
Line In – Balanced and Single-ended
Variable Gain mode at maximum: 1.41 V for 620 W in 8 ohms
Bridge Mode Gain
Fixed Gain mode: 25.4 dB
Line In – Balanced and Single-ended
Variable Gain mode: 14.5 dB – 34.5 dB
Standby power
<0.5 W

DIMENSION AND WEIGHT
Gross dimensions (W x H x D)
435 x 120 x 390 mm (17 1/8 x 4 3/4 x 15 3/8 inches)
Net weight
11.2 kg (24.7 lbs)
Shipping weight
13.6 kg (30 lbs)