NAD C 325BEE - Manual (Page 2)

supply parameters of the amplifier to best cope with the actual
musical signal and specific speaker loading characteristics.
• Soft Clipping eliminates the harsh sound that occurs when
an amplifier is overdriven. This feature also protects sensitive
loudspeaker tweeters that can be easily damaged by the high
frequency distortion caused by clipping (clipping describes the
distorted shape of a musical sine wave when an amplifier is
driven beyond its power rating).
• BEE Clamp is a new answer to an old problem endemic
to all transistor amplifier designs. When the output transistors
produce heat faster than it can be dissipated, the amplifier
becomes momentarily unstable. This happens when the music
has rich high frequency content and the speaker has low or
difficult impedance. The BEE Clamp employs sophisticated real
time monitoring of the output transistors’ load and drive and
“clamps” the base drive to prevent saturation when necessary,
thus improving amplifier stability and waveform fidelity. The
C325BEE can instantly recover from overload, reducing both
the amount and the duration of distortion, regardless of load
impedance.
NAD has a deeper understanding of the nature of musical
sounds and has devised innovative circuits that overcome
the limitations of semiconductors, capacitors, and the other
electronic components that make up an amplifier. This innovation
has resulted in a product that truly excels in the reproduction of
music.
How we made the best better
The C320BEE and its predecessors has been the benchmark
for budget amplifiers for 30 years now, having won every award
in the Hi-Fi industry several times over. Making the C325BEE
better than the C320BEE was a tall order! By “trickling down”
several innovations from NAD’s new state-of-the-art Masters
Series products has resulted in the C325BEE having even
less distortion, less noise, and a more detailed rendition of the
musical recording.
• New DC Servo eliminates sound colouring capacitors in
the signal path. This improves musical detail and eliminates
harmful loudspeaker ‘offset’.
• Patented distortion cancelling circuit uses both feedback
and feedforward to reduce distortion and improve amplifier
stability.
• Highly optimised circuit layout further lowers internal
impedance, improves grounding, and eliminates subtle
magnetic distortions. Lower noise and distortion, and improved
channel separation are a direct result of this optimisation.
• Surface mount (SMD) technology shortens signal paths and
lowers distortion in NAD’s proprietary Class A gain modules.
• BEE Clamp improv es HF stability when driving difficult
speakers.
• Volume Control has minimum volume cancellation circuit to
increase attenuation by 10dB.
• Tone controls are hand trimmed for perfect response
characteristics.
• A new idling current circuit is more accurate with less unit-to-
unit variation.
• More rigid chassis has improved mechanical integrity.
• MP Input for easy connection of iPod™, MP3 and other Media
Players employing 3.5mm headphone sockets.
Value, redefined
NAD has yet further improved the class leading amplifier using
new technology developed for its range topping Masters Series
components. The C325BEE is the new benchmark against
which all other affordable amplifiers will be compared. As with
the previous iterations of this classic NAD amplifier, you will
have to spend several times the C325BEE’s asking price before
you can even approach the technical precision and musical
involvement offered by this unassuming looking little amplifier. All
this sophistication and refinement is available now in the NAD
C325BEE; the new value leader in affordable Hi-Fi!
SPECIFICATIONS
Pre-Amp Section
Line level inputs
Input impedance (R+C)
Input sensitivity, rated power
Frequency response (20Hz - 20kHz)*
Line level outputs
Output impedance
Tape
Power Amp Section
Continuous output power into 8Ω
Rated Distortion (THD 20Hz - 20kHz)
Clipping power
IHF dynamic headroom at 8Ω
IHF dynamic power at 8Ω
IHF dynamic power at 4Ω
IHF dynamic power at 2Ω
Damping factor (ref. 8Ω, 50Hz)
Input impedance
Input Sensitivity (for rated power into 8Ω)
Voltage gain
20kΩ / 470pF
240mV
±0.1dB
80Ω
Source Z + 1kΩ
50W (17dBW)
0.02%
68W (18dBW)
3.4dB
110W (20.4dBW)
160W (22.0dBW)
210W (23.2dBW)
>160
20kΩ/ 470pF
730mV
29dB
Frequency response; 20Hz-20kHz
Signal/noise ratio; ref 1W
Signal/noise ratio; ref rated power
Phones
Physical Specifications
Dimensions (W x H x D)
Net Weight
Shipping Weight
+/-0.2dB
100dB
117dB
220Ω
17 1/8 x 3 15/16 x 11 7/16”
(435 x 100 x 290mm)
17.6 lbs (8.0kg)
19.8 lbs (9.0kg)
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 m
© 11/05 NAD Electronics International.
www.NADelectronics.com