NAD 216THX User Manual
216THX
Stereo Power Amplifier
• 2 x 125 Watts continuous power into 8ohms
2 x 200 Watts into 4ohms
• Dynamic Power 170, 280, 400 Watts into 8, 4 and 2 ohms
respectively
• Low loss, massive Holmgren™ toroidal mains transformer
• Dual mono, Left and Right mirror image amplifier PCBs
• Protection circuitry senses short circuits, DC and overheating
• Bridgeable; 400 W into 8 ; 800W dynamic power into 4
The all-new NAD 216 THX is part of a new range of power amplifiers which will further enhance NAD’s
enviable reputation for state of the art products at sensible prices.
The key design goals of the new range are PERFORMANCE and RELIABILITY. Both are attained at a very
competitive price through efficient innovative design, simple circuitry and meticulous engineering.
Circuitry
The NAD 216 THX is designed with the capability to drive all types of musical signals effortlessly into the
even most unreasonable of loudspeakers loads, down to below 1ohms. This is achieved by implementing
a high output current amplifier powered from a “stiff” power supply.
Pioneered by NAD for the highly acclaimed 208 THX, the 216 THX couples a bank of reservoir
capacitors to a large toroidal transformer. Using a bank of capacitors rather than a single pair is both
technically superior and more economical.
The special Holmgren™ toroidal transformer has less hum and magnetic leakage than conventional
toroidal transformers but retains the usual benefits of high efficiency and high power to weight ratio.
The entire “front-end” is fed from a separate low-noise, high voltage, discrete component regulated
power supply which effectively isolates the amplifier from power ripple and noise. Careful design
incorporating sensible grounding results in an amplifier with an exceptionally clean, noise free output
signal.
Additional features
For maximum flexibility, the NAD 216 THX can operate in bridged mono mode, typically tripling its
continuous power rating into 8ohms. This makes the NAD 216 THX an ideal choice for a sub-woofer
amplifier or high power centre channel amplifier in home theater applications. A pair of bridged NAD
216 THX’s becomes a high current, high power stereo power amplifier, while retaining the refinement
associated with smaller amplifiers.
NAD was the first company to introduce a THX certified power amplifier. It was therefore no surprise the
NAD 216 THX passed Lucas Films’ stringent THX requirements with flying colours. As a result the NAD
216 THX will handle all dynamics with ease and yet retain every subtle detail in the most demanding THX
Dolby Surround systems.
The output relay protection circuit provides silent switch on and off, together with non-evasive protection
against error conditions such as short circuits and overheating.
The NAD 216 THX also incorporates NAD’s acclaimed switchable “Soft Clipping” circuit which
significantly reduces the risk of damage due to prolonged high power operation.
The listening experience
The technological effort behind the NAD 216 THX results in a relaxed unstrained musicality with
transparent , airy high frequencies, a deep, solid bass foundation and a smooth well-integrated
midrange.
SPECIFICATIONS - NAD 216THX
Stereo Mode
Continuous Average Output Power 125W (21dBW)
(Minimum power per channel, 20Hz-20kHz both channels driven, with no more than rated distortion)
Rated distortion (THD 20Hz-20kHz) 0.03%
Clipping power
(maximum continuous power per channel) 160W
IHF dynamic headroom at 8ohms +1.3dB
IHF dynamic power 8 170W (22.3dBW)
(maximum short term power per channel) 4 280W (24.5dBW)
2 400W (26dBW)
Slew rate >70V/sec
Damping factor
(ref. 8ohms, 50Hz) >200
Input impedance 60k + 500pF
Input sensitivity
(for rated power into 8ohms) 1.1V
Voltage gain x 28.3 (29dBW)
Frequency response 20Hz-20kHz ±0.2dB
-3dB at 2Hz/100kHz
Signal/Noise ratio ref 1 W 98dB
ref. rated power 119dB
THD + SMPTE I.M. + IHF I.M. <0.03%
Bridged (Monophonic) Mode
Continuous Average Power Output into 8ohms 400W (26dBW)
(Minimum power per channel, 20Hz-20kHz,both channels driven, with no more than rated distortion)
IHF dynamic headroom at 8ohms +1.5dB
IHF dynamic power 8 560W (27.5dBW)
(maximum short term power per channel) 4 800W (29dBW)
Physical Specifications
Dimensions (W x H x D) 435 x 146 x 383 mm
Net weight 14.2kg
Shipping weight 16kg
NOTE: NAD reserves the right to change specifications or design at any time without notice. All specifications are those in effect at time of printing.
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