09-29-2004, 12:32 PM
Hola a todos,
Como ven este amplificador multicanal de la linea Silver Nad ???
![[Imagen: S250big.jpg]](http://www.saturdayaudio.com/S250big.jpg)
The NAD S250 is the perfect match for our S170 surround preamp/processor. It is a powerful, THX-certified 5-channel amplifier with transparent, wide-range sound that is clean and detailed from its solid, extended bass to its "airy," accurate high end. It will drive virtually any array of home theatre speakers to their full potential in almost any home listening environment.
Its feature list includes:
125W x 5 Continuous Power (8 ohms); all channels driven simultaneously
200W x 2 Continuous Power (8 ohms); two channels driven simultaneously
Low loss, massive Holmgren toroidal mains transformer
12 volt trigger for automated ON/OFF operation
Input gain control for each individual channel
THX certified
Mono-block, Modular construction
All inputs Gold Plated RCA
Differential, Class A input circuit topology
Soft Clipping
A closer look
The demanding job of complimenting the S170 preamp/processor with a five-channel power amp of sufficient power for large Home Theatre layouts — with enough reserves for even lower-sensitivity 5.1-channel speaker arrays — is a challenge met brilliantly by the S250 surround power amplifier. It maintains the Silver Series' uncompromising standards for sonic excellence with the S250, whose five fully independent 125-watt channels supply the performance, stability and reliability needed to earn the demanding THX Ultra certification with ease.
The S250 employs monoblock construction for each of its five channels. Every element of each channel's circuitry except for the power transformer is fully independent, eliminating inter-channel influences as a concern. Like its stereo predecessor, the Silver Series S200, the five-channel S250 is stable and musical even into "unreasonable" loudspeaker loads. An immense edition of NAD's unique, extremely low-noise/low-hum "Holmgren" type toroidal power transformer—a significant advance over conventional toroid components — provides the five monoblock amplifier sections with over 60,000 uF of storage capacitance to ensure an ample reserve of power for even the most demanding music and film soundtracks.
Each section features pure-differential, fully Class A input and driver stage circuits, and a high-current output-stage design, employing the same high speed output devices as used in the S200 to achieve superb dynamic quality. The result is musical detail, impact, and soundstage stability and depth unmatched by multi-channel amps of two and three times the S250's price. And our proprietary Soft Clipping (defeatable) maintains sonic quality under even severe overdrive conditions.
Individual gain adjustment for each channel promotes easy, accurate system configuration, as does the S250's integral 12-volt-trigger turn-on response, which features a Sophisticated "zero crossing" triad rather than the more common mechanical relay to promote long component life and reduced turn-on surge. The multi-channel amplifier delivers its output via very heavy-duty "five-way" connectors.
NAD was the first company to introduce a THX-certified power amplifier. It is therefore no surprise that the NAD S250 passes Lucas Films' stringent THX requirements with flying colours. The S250 will handle all dynamics with ease and yet retain every subtle detail in the most demanding THX Dolby Surround systems.
The S250 incorporates NAD's unique, defeatable Soft-Clipping circuitry for all five channels. Any amplifier can be overdriven if asked to play too loud, exceeding its maximum rated output power). Under such circumstances, amplifiers will produce extremely high levels of distortion, which, besides sounding very unpleasant, can damage your loudspeakers. The Soft Clipping circuit will curtail such distortion and minimise the risk of damage to speakers. This is particularly important with AV software that often consists of very dynamic and sustained outbursts in which, unlike music, it is difficult to hear this potentially damaging distortion.
Ruggedness and in-system reliability are critical to successful custom-installed systems. This amplifier utilises a combination of fuse and electronic non-intrusive protection: dependable, fail-safe, and sonically benign. Each channel is protected against excess temperature, DC fault and loudspeaker short-circuit. Most important of all, the S250's inherently conservative, high-voltage/high-current output-stage engineering has been designed for years of high-performance, trouble-free service.
S250 multichannel power amplifier Specifications
Power Amp Section
Continuous Average Power Output at 8 ohms 1 5 x 125W (21.0dBW)
Rated distortion (THD 20Hz-20kHz) <0.05%
Clipping power 0.05%
IHF power dynamic headroom at 8 ohms +1.4dB
IHF power dynamic power 8 ohms 172W (22.4dBW)
4 ohms 273W (24.4dBW)
Damping factor ref. 8 ohms, 50Hz >300
Input impedance (rated power into 8 ohms) 50k ohms
Input sensitivity 1.1 V
Voltage gain 29.0dB
Frequency response 20Hz-20kHz +0, -0.2dB
2Hz to 100kHz -3dB
Signal/noise ratio ref. 1W 95dB
(ref. rated power) 125dB
Physical Specifications
Dimensions (W x H x D) 17 3/4 x 5 15/16 x 15 9/16"
(450 x 150 x 395mm)
Net weight 41.8 lbs (19.0kg)
Shipping weight 46.30 lbs (21.0kg)
S250 Amplifier
List $2500
Now $999
Saludos
Carlos Villegas
Como ven este amplificador multicanal de la linea Silver Nad ???
The NAD S250 is the perfect match for our S170 surround preamp/processor. It is a powerful, THX-certified 5-channel amplifier with transparent, wide-range sound that is clean and detailed from its solid, extended bass to its "airy," accurate high end. It will drive virtually any array of home theatre speakers to their full potential in almost any home listening environment.
Its feature list includes:
125W x 5 Continuous Power (8 ohms); all channels driven simultaneously
200W x 2 Continuous Power (8 ohms); two channels driven simultaneously
Low loss, massive Holmgren toroidal mains transformer
12 volt trigger for automated ON/OFF operation
Input gain control for each individual channel
THX certified
Mono-block, Modular construction
All inputs Gold Plated RCA
Differential, Class A input circuit topology
Soft Clipping
A closer look
The demanding job of complimenting the S170 preamp/processor with a five-channel power amp of sufficient power for large Home Theatre layouts — with enough reserves for even lower-sensitivity 5.1-channel speaker arrays — is a challenge met brilliantly by the S250 surround power amplifier. It maintains the Silver Series' uncompromising standards for sonic excellence with the S250, whose five fully independent 125-watt channels supply the performance, stability and reliability needed to earn the demanding THX Ultra certification with ease.
The S250 employs monoblock construction for each of its five channels. Every element of each channel's circuitry except for the power transformer is fully independent, eliminating inter-channel influences as a concern. Like its stereo predecessor, the Silver Series S200, the five-channel S250 is stable and musical even into "unreasonable" loudspeaker loads. An immense edition of NAD's unique, extremely low-noise/low-hum "Holmgren" type toroidal power transformer—a significant advance over conventional toroid components — provides the five monoblock amplifier sections with over 60,000 uF of storage capacitance to ensure an ample reserve of power for even the most demanding music and film soundtracks.
Each section features pure-differential, fully Class A input and driver stage circuits, and a high-current output-stage design, employing the same high speed output devices as used in the S200 to achieve superb dynamic quality. The result is musical detail, impact, and soundstage stability and depth unmatched by multi-channel amps of two and three times the S250's price. And our proprietary Soft Clipping (defeatable) maintains sonic quality under even severe overdrive conditions.
Individual gain adjustment for each channel promotes easy, accurate system configuration, as does the S250's integral 12-volt-trigger turn-on response, which features a Sophisticated "zero crossing" triad rather than the more common mechanical relay to promote long component life and reduced turn-on surge. The multi-channel amplifier delivers its output via very heavy-duty "five-way" connectors.
NAD was the first company to introduce a THX-certified power amplifier. It is therefore no surprise that the NAD S250 passes Lucas Films' stringent THX requirements with flying colours. The S250 will handle all dynamics with ease and yet retain every subtle detail in the most demanding THX Dolby Surround systems.
The S250 incorporates NAD's unique, defeatable Soft-Clipping circuitry for all five channels. Any amplifier can be overdriven if asked to play too loud, exceeding its maximum rated output power). Under such circumstances, amplifiers will produce extremely high levels of distortion, which, besides sounding very unpleasant, can damage your loudspeakers. The Soft Clipping circuit will curtail such distortion and minimise the risk of damage to speakers. This is particularly important with AV software that often consists of very dynamic and sustained outbursts in which, unlike music, it is difficult to hear this potentially damaging distortion.
Ruggedness and in-system reliability are critical to successful custom-installed systems. This amplifier utilises a combination of fuse and electronic non-intrusive protection: dependable, fail-safe, and sonically benign. Each channel is protected against excess temperature, DC fault and loudspeaker short-circuit. Most important of all, the S250's inherently conservative, high-voltage/high-current output-stage engineering has been designed for years of high-performance, trouble-free service.
S250 multichannel power amplifier Specifications
Power Amp Section
Continuous Average Power Output at 8 ohms 1 5 x 125W (21.0dBW)
Rated distortion (THD 20Hz-20kHz) <0.05%
Clipping power 0.05%
IHF power dynamic headroom at 8 ohms +1.4dB
IHF power dynamic power 8 ohms 172W (22.4dBW)
4 ohms 273W (24.4dBW)
Damping factor ref. 8 ohms, 50Hz >300
Input impedance (rated power into 8 ohms) 50k ohms
Input sensitivity 1.1 V
Voltage gain 29.0dB
Frequency response 20Hz-20kHz +0, -0.2dB
2Hz to 100kHz -3dB
Signal/noise ratio ref. 1W 95dB
(ref. rated power) 125dB
Physical Specifications
Dimensions (W x H x D) 17 3/4 x 5 15/16 x 15 9/16"
(450 x 150 x 395mm)
Net weight 41.8 lbs (19.0kg)
Shipping weight 46.30 lbs (21.0kg)
S250 Amplifier
List $2500
Now $999
Saludos
Carlos Villegas