218THX

Stereo Power Amplifier
2 x 200 Watts continuous power into 8ohms (230 V version) 2 x 225 Watts continuous power into 8ohms (120 V version) Dynamic Power 250, 430, 660 W into 8, 4 and 2 ohms (230V) Dynamic Power 280, 470, 700 W into 8, 4 and 2 ohms (120V) Low loss, massive Holmgren toroidal mains transformer Dual mono, Left and Right mirror image amplifier PCBs Fully balanced XLR inputs Soft Clipping Protection circuitry senses short circuits, DC and overheating Bridgeable; 700 W into 8 ; 1.2 kW dynamic power into 4 The all-new NAD Model 218 THX joins the award winning range of NAD Power Amplifiers combining the traditional NAD virtues of excellent performance and value-for-money, further enhancing 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, attained by efficient innovative design, simple circuitry and meticulous engineering. Circuitry The NAD 218 THX is designed with the capability to drive all types of musical signals effortlessly into the even most unreasonable of loudspeakers loads. To cope with difficult loads (even as low as 1ohms), the NAD Model 218 THX is equipped with a high current output stage combined with a very generous power supply. The massive "Holmgren" toroidal transformer, has even less hum and magnetic leakage than conventional toroids, and retains the usual benefits of high efficiency and power-to-weight ratio. Pioneered by NAD for the highly acclaimed Model 208 THX, the Model 218 THX uses a bank of reservoir capacitors rather than a single pair. Besides being a more economical solution this is also technically superior as many smaller capacitors have a faster recovery time and less total inductance than a single pair of larger capacitors. The input stage is fed from a separate low-noise, regulated power supply which isolates it from the high power sections eliminating interference. Additional features The Model 218 THX comes with fully balanced XLR inputs which allow it to be partnered with professional equipment or with long stretches of cable between the pre- and power amplifier without the risk of interference. The standard 19 inch rack mounting front panel further facilitate the use of the Model 218 THX in a professional environment. The output relay protection circuit provides silent switch on and off, together with non-evasive protection against unlikely error conditions such as short circuits and overheating. For maximum flexibility, the NAD Model 218 THX can also be operated in bridged mono mode, typically tripling its output power rating. This makes the NAD 218 THX an ideal choice for a sub-woofer amplifier or high powered amplifier in THX or other Home Theater applications. The Model 218 THX also incorporates NAD's acclaimed switchable "Soft Clipping" circuit which significantly reduces the risk of damage to loudspeakers due to prolonged high power operation. NAD was the first company to introduce a THX certified power amplifier. It is therefore no surprise that the NAD Model 218 THX passes Lucas Films' stringent THX requirements with flying colours. The listening experience Whilst there are other very powerful amplifiers available, the NAD Model 218 THX goes beyond just brute force: It's sonic performance is among the very best available, be it at low or high power levels.
SPECIFICATIONS - NAD 218 THX Unbridged (Stereo) Mode CONTINUOUS OUTPUT POWER Rated distortion (THD 20Hz-20kHz) Clipping power (maximum continuous power per channel) IHF dynamic headroom at 8ohms IHF dynamic power
(maximum short term power per channel)
120V 225W (23.5 dBW) 0.03% 240W (23.8 dBW) 1 dB 280W (24.5 dBW) 470W (26.7 dBW) 700W (28.4 dBW) >100V/s >200 47k /700pF 1.4V x 28.3 (29 dB) + 0.3 dB 2.5Hz / 80kHz 96 dB 120 dB <0.03%

230V 200W (23 dBW)

(Minimum power per channel, 20Hz-20kHz, both channels driven, with no more than rated distortion)
210W (23.2 dbW) 250W (24 dBW) 430W (26.3 dBW) 660W (28.2 dBW)
Slew rate Damping factor (ref. 8ohms, 50Hz) Input impedance Input sensitivity (for rated power into 8ohms) Voltage gain Frequency response Signal/Noise ratio THD + SMPTE I.M. + IHF I.M.
20Hz-20kHz -3dB at ref. 1 W ref. rated power
Bridged (Monophonic) Mode CONTINUOUS AVERAGE POWER OUTPUT INTO 8 IHF dynamic headroom at 8ohms IHF dynamic power
780W (28.9 dBW) 1 dB 940W (29.7 dBW) 1.3kW (31.1 dBW)

700W (28.5 dBW)

880W (29.4 dBW) 1.2kW (30.8 dBW)
Physical Specifications Dimensions Net Weight Shipping Weigth 483 x 175 x 370mm 23kg 30kg
Dolby is a registered trademark of Dolby Laboratories Ltd. THX is a registered trademark of Lucas Film Co. 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.

Modicon Modbus Plus Cables
List of Modbus Plus Cables and Taps Modbus Plus combines high-speed, peer-to-peer communications and simple implementation to reduce installation costs. This local area network allows host computers, controllers, and other data sources to communicate as peers via twistedpair cables. The following table contains a list of Modbus Plus cables and Modbus Plus taps.
Part Number 490 NAA 490 NAA 490 NAA 490 NAA 490 NAA 990 NAD 990 NAD 990 NAD 990 NAD 990 NAD 990 NAD 990 NAD 043509383 Description Modbus Plus trunk cable, 100 ft (30 m) Modbus Plus trunk cable, 500 ft (152 m) Modbus Plus trunk cable, 1000 ft (305 m) Modbus Plus trunk cable, 1500 ft (457 m) Modbus Plus trunk cable, 5000 ft (1524 m) Modbus Plus drop cable, 8 ft (2.4 m) Modbus Plus drop cable, 20 ft (6 m) Modbus Plus drop cable (left side drop), 8 ft (2.4 m) Modbus Plus drop cable (left side drop), 20 ft (6 m) Modbus Plus drop cable (right side drop), 8 ft (2.4 m) Modbus Plus drop cable (right side drop), 20 ft (6 m) Modbus Plus tap Modbus Plus tap tool
Note: For detailed information about the Modicon Modbus Plus system, please refer to Modicon Modbus Plus Network Planning and Installation Guide (890USE10000).

990 NAD 218 x0

990 NAD 219 x0

043501553.77 7/2010

Valid Combinations of Modicon Products and Modbus Plus Drop Cables
Modicon Product Quantum series modules 984-145 984-245 984-255 984-385 984-485 984-685 984-AT 984 VME S985-000 S985-800 BP85 BM85 EMBP MC-984 RR85 SA85 SM85

990 NAD 211 xx

990 NAD 218 xx

990 NAD 219 xx