NAD M25 Manuale Utente
The Masters Series – M25 Seven Channel Power Amplifier
- THX Ultra 2 Compatible
- 7 X 160 watts Full Disclosure Power, 20Hz -
- 7 X 160 watts Full Disclosure Power, 20Hz -
20kHz, at less than 0.03THD with all channels
driven simultaneously into 8/4 Ohms
driven simultaneously into 8/4 Ohms
- PowerDrive™
- Dynamic power of 220 watts at 8 Ohms, 385
- Dynamic power of 220 watts at 8 Ohms, 385
watts at 4 Ohms, and 485 watts at 2 Ohms
- NAD’s Custom-Made “Holmgren” transformer
- NAD Soft Clipping™
- Precision low noise Input Level Controls
- Custom 5 way Binding Post
- 12V Trigger for advanced control options, 1 in
- Detachable AC cord
- NAD Soft Clipping™
- Precision low noise Input Level Controls
- Custom 5 way Binding Post
- 12V Trigger for advanced control options, 1 in
- Detachable AC cord
MASSIVE POWER
More power is always better when it comes to sound quality. Power is
required not only to play loudly, but also to play cleanly without audible distor-
tion. When an amplifier is asked for more power than it was designed to deliver,
it can only respond with distortion.Fortunately the M25 is one of the most pow-
erful amplifiers on the market today designed for home use. With a minimum
of 160 continuous watts per channel, all channels driven simultaneously, from
20Hz to 20kHz at rated distortion of 0.03%, the M25 easily delivers lifelike
sound levels even in large home theatre rooms. It handily meets THX’s most
stringent certification level, Ultra 2.
tion. When an amplifier is asked for more power than it was designed to deliver,
it can only respond with distortion.Fortunately the M25 is one of the most pow-
erful amplifiers on the market today designed for home use. With a minimum
of 160 continuous watts per channel, all channels driven simultaneously, from
20Hz to 20kHz at rated distortion of 0.03%, the M25 easily delivers lifelike
sound levels even in large home theatre rooms. It handily meets THX’s most
stringent certification level, Ultra 2.
Unlike most surround sound receivers (NAD’s own receivers are a rare
exception) that only rate power with 1 or 2 channels running, or use
very short term measurements, the M25 can deliver its full rated power
exception) that only rate power with 1 or 2 channels running, or use
very short term measurements, the M25 can deliver its full rated power
continuously for hours on end. Custom designed heat sinks and thermo-
statically regulated variable speed fans keep things cool under the most
severe operating conditions. A unique fan circuit that tracks signal lev-
el, actually shuts down the fans during quiet passages to prevent any
statically regulated variable speed fans keep things cool under the most
severe operating conditions. A unique fan circuit that tracks signal lev-
el, actually shuts down the fans during quiet passages to prevent any
mechanical noise from interfering with the program material.
But it’s not just the quantity of power that is important, it is also the quality of
power that determines whether you can hear just a fiddle sound, or the unique
character of a Stradivarius violin.
power that determines whether you can hear just a fiddle sound, or the unique
character of a Stradivarius violin.
SOPHISTICATED CIRCUITRY
The M25 is comprised of 7 individual ‘Monoblock’ amplifier channels. Each
channel uses a balanced junction FET input stage resulting in exceptionally low
levels of noise and distortion. NAD employs a unique electronic ground isola-
tion circuit to prevent ground loop noise in the system – a common problem
in complex multi-channel systems. This circuit offers high input impedance for
negligible loading on source components which results in less noise and distor-
tion in the real world.
channel uses a balanced junction FET input stage resulting in exceptionally low
levels of noise and distortion. NAD employs a unique electronic ground isola-
tion circuit to prevent ground loop noise in the system – a common problem
in complex multi-channel systems. This circuit offers high input impedance for
negligible loading on source components which results in less noise and distor-
tion in the real world.
A fully complementary differential class A voltage amp with a push pull cascode
output stage, provides ample current to drive the triple emitter-follower output
stage. This circuit topology offers very low distortion combined with high current
capability.
output stage, provides ample current to drive the triple emitter-follower output
stage. This circuit topology offers very low distortion combined with high current
capability.
NAD’s PowerDrive™ circuitry measures each channel’s dynamic impedance