Model 317
Integrated Amplifier

Since its introduction, the NAD Model 214 Power Amplifier has enjoyed a strong following and tremendous reputation throughout the world for its performance and reliability. The latest addition to NAD's range of integrated amplifiers is the Model 317 which is very closely related to the Model 214. In fact, the entire Power amplifier inside the Model 317 is identical to that of the Model 214.

Flexibility
Flexibility is a traditional strong NAD point. The Model 317 has 6 line inputs (including 2 tape in/outputs with dubbing facility both ways). By removing the links between the Pre-out and Main-in sockets the pre-amplifier section can be separated from the power amplifier for easy upgrades (bi-amping, for instance) or adding ancillary equipment.
As the built-in power amp of the Model 317 is identical to that of the NAD Model 214 you can easily triple the output power to your speakers by adding a Model 214 to your system. Bridge both power amplifiers and you have increased the power of your system to 2 x 240 Watts continuous into 8 ohms. Thanks to this "Building Block Concept" your Model 317 doesn't need to be made redundant to upgrade.

Performance
Rather than using electronic switching between sources, the NAD engineers have opted for using relays as these will give better performance at this price level. To ensure long term reliability only relays with gold-plated contacts have been used. The input selector relays are located as closely as possible to the input sockets to minimise cross talk and interference. As with the relays, all input and output sockets are gold plated to ensure reliable signal transfer. A generous power supply (the same massive HolmgrenSYMBOL 212 \f "Symbol" Toroidal transformer as the Model 214 is used) and over-rated output devices further lead to low noise and low distortion.
The overall high level of performance is achieved by using discrete circuitry only and high quality close-tolerance components such as metal film resistors and polypropylene capacitors. As one would expect from any NAD amplifier, the Model 317 will drive loudspeakers with complex loads (such as low impedances) with great ease.
The Model 317 also incorporates NAD's acclaimed switchable "Soft Clipping" circuit which significantly reduces the risk of damage to loudspeakers due to prolonged high power operation.
Apart from operating the Model 317, the remote control supplied with the 116 will also operate many other NAD components. The NAD Link sockets provide for communication between the other NAD components for complete control.

Convenience, flexibility and, above all, performance, are the hallmarks of the NAD Model 317. Consistent with NAD's reputation the Model 317 is somewhat of a bargain when compared to amplifiers with similar performance.

NAD reserves the right to change specifications or design at any time without notice. All specifications are those in effect at time of printing.


Power Amplifier Section 
Continuous average power output into 8 ohms  75W 
(Min power/channel, 20Hz-20kHz, no more than rated distortion) 
Rated distortion (THD 20Hz-20kHz)  0.03% 
Clipping power (maximum continuous power per channel)  105W 
IHF dynamic headroom at 8 ohms +1.5dB 
IHF dynamic power  8 ohms 110W (20.4dBW) 
(maximum short term power per channel)  4 ohms 180W (22.6 dBW) 
2 ohms 250W (24dBW) 
Slew rate  >60 V/µsec 
Damping factor (ref 8 ohms 50 Hz)  >200 
THD + SMPTE + IHF I.M. (from 250mV to rated output)  <0.03% 
Input impendance  60k ohms + 500pF 
Input sensitivity (for rated output into 8 ohms)  0.9V 
Input gain  x 28.2 (29dB) 
Signal/noise ratio, A weighted  ref. 1W  98dB 
ref. rated power  115dB 
Frequency response, 20Hz-20kHz  2Hz/100kHz (-3dB) 
Bridged (Monophonic) Mode
Continuous average power output into 8 ohms  240W (23.8 dBW) 
(Min power/channel, 20Hz-20kHz, no more than rated distortion)
IHF dynamic headroom at 8 ohms +1.8 dB 
IHF dynamic power  8 ohms 360W (25.6 dB) 
(maximum short term power per channel)  4 ohms 500W (27 dBW) 
Line Level Inputs (CD, Video, Tape, Aux) 
Input sensitivity ref. rated output  150mV 
Maximum input signal  >8V 
Signal/Noise ratio, A weighted  ref. 0.5V  115dB 
ref. rated power  360W (25.6 dB) 
Frequency response, 20Hz-20kHz  ±0.3dB 
Voltage gain  16dB 
THD + SMPTE +IHF I.M  0.098% 
Line Level Outputs 
Output impedance  Pre Out  2.2k ohms
Tape Source  Source Z + 2.2k ohms
Video  2.2k ohms
Maximum output level  Pre Out  Mono 800mV 
Tape out  >10V into 600 ohms
Controls 
Bass ±10dB at 10kHz 
Treble ±7dB at 100Hz 
Remote Control Yes
Physical Specifications 
Dimensions in mm (WxHxD)  435x145x330 
Net Weight  12kg 
Shipping Weight  13.5kg 

Specifications are measured in accordance with EIA standard RS-490 (IHF A-202) for amplifiers and ANSI-IEEE Standard 185 (1975), ie. IHF T-200 for tuners. Tuner sensitivity is measured via 75 ohm coaxial input. Sensitivity figures for 300 ohm input can be derived by multiplying 75 ohm figure by two. Amplifier measurements referenced to 8 ohm are taken with the speaker Impedance Select at 8 ohm (high). Measurements for 4 ohm and 2ohm are taken with the Impedance Select at 4 ohm (normal).