C 275BEE Stereo Power Amplifier

C 275BEE Stereo Power Amplifier
C 275BEE Stereo Power Amplifier
> POSITIONING
The C 275BEE is the perfect complement to NAD’s C 165BEE Preamplifier making a reference level of performance available for far less money
than previously possible. Attention to the most minute detail is evident everywhere, from the heavy gauge steel chassis to the sophisticated
power supplies and copper buss bars channeling almost absurd amounts of current to the custom gold plated speaker binding posts.
The C 275BEE boasts many upgrades and refinements taken directly from the highly acclaimed NAD Masters Series M3 Amplifier. These include
application of Bjorn Erik Edvardsen’s innovative and patented Distortion Canceling Circuit in the output stage and BEE Clamp in the power
supply. An improved tone control circuit and revised 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!
> FEATURES
•
150W x 2 Continuous Power into
4 Ohms and 8 ohms
•
250W, 410W, 600W IHF Dynamic
power into 8, 4 and 2 ohms, respectively
•
•
Class A Voltage Stages
•
Distortion Canceling Circuit
•
BEE Anti-saturation Clamp
PowerDriveTM circuit
•
Short signal path from input to output
•
Holmgren Toroidal Power transformer
•
All sockets Gold plated
•
All discrete circuitry
•
Soft ClippingTM
•
ATOLogic 12 volt trigger/
signal sensing input
•
Detachable IEC Power Cable
•
<1W Standby Power Consumption
•
Free of lead and other environmentally
dangerous substances
> DETAILS
Features
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.
Design: PowerDrive
The C 275BEE also benefits from NAD’s proprietary
PowerDrive circuit topology, now well established
and used throughout the NAD product range.
The PowerDrive topology allows the C 2 75BEE to
deliver maximum performance under virtually any
circumstance, independent of the loudspeakers it
is driving. The circuitry automatically senses the
impedance characteristics of the loudspeaker and will
then adjust its power supply settings to best cope with
that specific load. PowerDriveTM topology is a practical
approach to enable an amplifier to easily deal with
musical dynamics and difficult speaker loads. Thus
we have the highly desirable characteristics of high
dynamic power and low impedance drive capability in
one affordable package.
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. To prove it
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 of our competitors. We use this stricter
performance criterion because it 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.
NAD also takes a stand against the meaningless
“brochure power” touted by many of our competitors
by offering Full Disclosure power specs. We specify
minimum continuous power, across the entire audible
range of frequencies, at rated distortion, for both
8 and 4 Ohms with all channels driven simultaneously.
Perhaps even more importantly, we also specify
Dynamic Power at 8, 4, and even 2 Ohms, which better
describes the way the amplifier will perform in the
real world, with musical signals and reactive
loudspeaker loads.
Less Distortion = More Music
Noise and distortion mask the fine details of a musical
recording robbing musical texture and dimension and
replacing them with non-musical artifacts. NAD has
spent the last 35 years perfecting our designs to have
the lowest distortion and highest power in its price
class. This cannot be overstated! Our competitors
often rate distortion at only 80% of rated power, and
even then can’t match our very conservative spec of
0.008% at any frequency within the range of human
hearing. Our noise spec is often 10dB (100 times!)
less than that of competing amplifiers. This is far
from a trivial difference as fine detail and nuance
(micro dynamics) are often obscured by noise in lesser
amplifiers, robbing a performance of that illusive sense
of ‘realism’. It is that exciting feeling of being there at
the live performance.
But even the most carefully reported specs cannot fully
describe the sonic performance of an amplifier. Only
your own ears can finally judge our achievement. We
urge you to listen and compare NAD to other products
in its price range, and even higher. We don’t think
you’ll find anything that comes close to offering the
C 275BEE’s overall musical satisfaction, well-rounded
performance, and stellar value for money.
NAD Electronics International reserves the right to change specifications or features without notice. NAD is a registered trademark of NAD Electronics
International. All rights reserved. No part of this publication may be reproduced, stored, or transmitted in any form whatsoever without the written
permission of NAD Electronics International. © 10/08 NAD Electronics International.
www.NADelectronics.com
C 275BEE Stereo Power Amplifier
> SPECIFICATIONS
Overall Specifications
Fixed IN, Speaker OUT
Continuous output power into 8 Ω
and 4 Ω (both channels driven)
>150 W (ref. rated THD,
20 Hz – 20 kHz)
Continuous output power into 8 Ω
(Mono, Bridge mode)
Input Sensitivity
1-2v (ref. rated power)
Voltage gain
29 dB
Minimum input level for
<0.02% THD)
AUTO TRIGGER
10 mV at 1 kHz
Time to power OFF at
rated power, CCIF IMD,
no signal in AUTO mode
DIM 100)
<0.008 % (ref. 20 Hz - 20 kHz)
Clipping power (4 Ω and 8 Ω)
>170 W (ref. 1 kHz 1% THD)
8Ω
250 W
4Ω
410 W
2Ω
600 W
IHF dynamic power
(Bridge mode)
100 kΩ + 100 pF
>330 W (ref. 20 Hz - 20 kHz,
Rated THD (250 mW to
IHF dynamic power
Input impedance (Variable IN)
<10 minutes
Power Consumption
Normal operation
312 W (ref. 230V AC 50 Hz;
120V AC 60 Hz)
Standby power
<1 W
Idle power
<100 W
Dimension and Weight
8Ω
800 W
4Ω
1200 W
Dimensions (W x H x D)
Net
435 x 133 x 352 mm
17 1/8” x 5 1/4” x 13 3/4”
Peak output current
>50 A (ref. 1 Ω, 1 ms)
Signal/Noise ratio
>102 dB (A-weighted, ref. 1 W)
Gross
Damping factor
>180 (ref. 8 Ω, 50 Hz and 1 kHz)
Frequency response
± 0.1 dB (ref. 20 Hz - 20 kHz)
3 Hz - 100 kHz (ref. -3 dB)
Input impedance (Fixed IN)
435 x 150 x 378 mm
17 1/8” x 6” x 15”
>123 dB (A-weighted, ref. 150 W)
10 kΩ + 200 pF
Net weight
32.2 lbs (14.6 kg)
Shipping
weight
37.3 lbs (16.9 kg)
* Gross Dimensions include volume knob / speaker terminals / connectors / feet.
Note: Installers should allow a minimum clearance of 2 - 4 inches for
wire management.
> REAR LINE DRAWING
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement