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NAD C 275BEE Stereo Power Amplifier

Tons of Power for Every Situation

The NAD C 275BEE boasts many upgrades and refinements taken directly from the highly acclaimed NAD Masters Series M3 Amplifier. These include a Distortion Canceling Circuit in the output stage and BEE Clamp in the power supply. A carefully engineered PCB layout has reduced distortion and noise to unprecedented levels. Taken together, these improvements mark a sharp upturn in performance that simply must be heard to be fully appreciated.

While 150W is very powerful for home use, there can never be too much power if you like your music loud and clear. An option to add more power in the future is to 'bridge' the C 275BEE and add a matching C 275BEE for one of the most powerful home audio systems you'll ever encounter. Power goes from 150W x 2 to over 400W x 2. This also has the additional benefit of being 'dual mono', meaning each channel and each speaker is totally isolated from the effect of the other. The C 275BEE is equipped with NAD's ATOLogic circuit which includes both a 12V-trigger system and signal-sensing turn ON option. This extra level of flexibility makes it easy to integrate the C 275BEE into automated control systems or simply enjoy the extra convenience of auto turn ON. Consumption is a very low (<1W) when in Standby mode.

PowerDrive Design
The C 275BEE also benefits from NAD's proprietary PowerDrive circuit topology. This allows the C275BEE to deliver maximum performance under virtually any circumstance, independent of the loudspeakers it drives. The circuitry automatically senses the impedance of the loudspeaker and will then adjust its power supply settings to best cope with that specific load. PowerDrive topology is a practical approach to enable an amplifier to easily deal with musical dynamics and difficult speaker loads. Getting high dynamic power from the power supply to your loudspeaker requires a fast wideband amplifier stage rugged enough to pass and control high peak currents without premature protection intervening. The safe operating limit for the C 275BEE has 4 times the capacity of the typical amplifier in this price range by using 4 pairs of 220W output transistors per channel.

The C 275BEE has the lowest levels of distortion and noise available in its price class and is easily capable of embarrassing far more expensive products. NAD uses Full Disclosure Power, the most demanding criteria for performance measurement. FDP specifies distortion under the most extreme conditions of low impedance loads and frequency extremes rather than the simple and easy 1kHz @ 8 Ohms test quoted by many. This stricter performance criterion more closely matches the demands of real music and real loudspeakers. Maintaining specified distortion at 4 Ohms and at 20Hz and 20kHz is several orders of magnitude more difficult to achieve than the simple 8 Ohms and 1kHz test.

  • 2 x 150W Continuous Power into 4 ohms and 8 ohms
  • 250W, 410W, 600W IHF Dynamic power into 8, 4 and 2 ohms, respectively
  • PowerDrive circuit
  • Holmgren Toroidal Power transformer
  • All discrete circuitry
  • Class A Voltage Stages
  • Distortion Canceling Circuit
  • BEE Anti-saturation Clamp
  • Short signal path from input to output
  • All sockets Gold plated
  • Soft Clipping
  • ATOLogic 12 volt trigger/ signal sensing input
  • Detachable IEC Power Cable
  • <1W Standby Power Consumption
  • Free of lead and other environmentally dangerous substances
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Continuous output power
    8Ω and 4Ω (both channels driven): >150W (ref. rated THD, 20Hz – 20kHz)
    8Ω (Mono, Bridge mode): >330W (ref. 20Hz - 20kHz, <0.02% THD)
Rated THD (250mW to rated power, CCIF IMD, DIM 100): <0.008% (ref. 20Hz - 20kHz)
Clipping power (4Ω and 8Ω): >170W (ref. 1kHz 1% THD)
IHF dynamic power:
    8Ω 250W
    4Ω 410W
    2Ω 600W
IHF dynamic power:
    8Ω 800W
    4Ω 1200W
Peak output current: >50A (ref. 1Ω, 1ms)
Signal/Noise ratio: >102dB (A-weighted, ref. 1W) >123dB (A-weighted, ref. 150W)
Damping factor: >180 (ref. 8Ω, 50Hz and 1kHz)
Frequency response:
    ± 0.1dB (ref. 20Hz - 20kHz)
    3Hz - 100kHz (ref. -3dB)
Input impedance:
    Fixed IN: 10kΩ + 200pF
    Variable IN: 100kΩ + 100pF
Input Sensitivity: 1.2V (ref. rated power)
Voltage gain: 29dB
Minimum input level for AUTO TRIGGER: 10mV at 1kHz

Time to power OFF at no signal in AUTO mode: <10 minutes
Normal operation: 312W (ref. 230V AC 50Hz; 120V AC 60Hz)
Standby power: <1W
Idle power: <100W
Dimensions (WHD): 17 1/8" x 6" x 15 3/8"
Weight: 37.3 lbs
Warranty: User Interfaces - one year parts and labor to the original purchaser. Two years parts and labor to the original purchaser on all other products

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User Manual (PDF, 719 KB)

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