Nad 3020 B Brochure
This is the 3 pages manual for Nad 3020 B Brochure.
Read or download the pdf for free. If you want to contribute, please upload pdfs to audioservicemanuals.wetransfer.com.
Extracted text from Nad 3020 B Brochure (Ocr-read)
Page 1
Infrasonic and Ultrasonic Filtering. Audio signals often are contaminated with interference at frequencies below and above the audible range-turntable rumble, floor vibration, tonearm/ stylus resonance, radio/TV interference, and home-computer static. Amplification of such signals would tend to waste amplifier power, cause bass distortion due to excess woofer cone travel, and produce audible intermodulation distortion. The precise, minimum-phase, audio bandpass filtering in the NAD 3020B and 3120 strips off such interference, preserving a clean musical waveform. Wide Dynamic Range The line-level inputs (Tuner, Aux, Tape) cannot be overloaded by dynamic signal peaks from a Compact Disc player. The total dynamic range of the amplifier, 100 dB, exceeds that of any available program source. Musically Useful Tone Controls Like every other aspect of the 3020BÕs circuitry, its Bass and Treble controls have been designed to be genuinely useful. They provide effective boost and cut at low bass and high treble frequencies, but they donÕt alter the tonal balance in the critical midrange the way many tone-control circuits do. High-Voltage, High-Current Output Stage While the 3020B/ 3120 is conservatively rated at 25 watts per channel, it behaves as if it were much more powerful. Its high-voltage design yields an IHF Dynamic Headroom factor of 3 dB, meaning that during musical transients this amplifier can deliver fully twice its rated power into an 8-ohm impedance. Even more important for genuinely musical sound is the amplifierÕs interface with the complex and variable impedances of real loudspeakers, which often are much lower than 8 ohms and are partly ÒreactiveÓ with high peak current demands. To supply this current to the speakers, the 3020B/3120 employs the same large output transistors that other manufacturers use In their Ò60-wattÓ amplifiers. During musical transients the circuit easily delivers over 55 watts/channel into a 4-ohm impedance and over 70 watts/channel into 2 ohms, with no protection- circuit distortion. NAD was the first manufacturer to emphasise the importance of output current capacity, and this power reserve has become increasingly important with the advent of advanced recording technologies that preserve the full dynamic range of live music. Binding-post Speaker Terminals Heavy-duty binding posts provide secure low-resistance connections for all types of speaker cable. Their standard s/aÓ spacing fits dual-banana plug connectors, facilitating quick reconnect ions among multiple pairs of loudspeakers. Soft Clippingª When the NAD 3020B/3120 amplifier is over-driven beyond its power capacity, the exclusive NAD Soft Clippingª circuit gently limits the waveform voltage so that the output transistors are never driven into saturation, i.e., into Òhard clipping.Ó This feature eliminates the harsh power-supply buzz and some of the high-order distortion that hard clipping normally would cause. Thus the amplifier can safely be over- driven substantially beyond its rated power on peaks, and it will continue to sound smooth and musical. Impedance Selector Any amplifier is basically an electronic valve, passing power from the power supply to the loud-speaker on demand, and so the voltage and current reserves of the power-supply circuit play a major role in the amplifierÕs performance. NADÕs unique impedance selector matches the amplifier to the loudspeakers. One setting of this switch provides increased output voltages for loudspeakers of 8 ohms or higher impedance. The other setting provides the lower volt-ages and greater output current needed to drive low impedances (4-ohm speakers or two pairs of speakers wired in parallel). The amplifier will even drive a 2 ohm load comfortably. NAD Makes High Performance Affordable Designed with thoughtfulness and care rarely found in budget components, the Models 3020B and 3120 amplifiers will drive the very best loudspeakers with ease and will do justice to the finest musical recordings. The NAD 3020B and 3120 amplifiers are complemented by the NAD 4020B AM/FM stereo tuner. A separate NAD 102OB pre-amplifier is also available.
Page 2
PRE-AMP SECTION Phono input Input impedance (R and C) 47k½/ 100pF Input sensitivity, 1kHz MM 2.7mV ref. 0.5V MC 180µV Signal/Noise ratio (A-weighted with cartridge connected) MM 75dB ref. 5mV MC 73dB ref. 0.5mV RIAA response accuracy (20Hz - 20kHz) ±0.5dB Line level inputs Input impedance (R and C) 20k½/ 220pF Input sensitivity (ref. 1W) 180mV Maximum input signal >25V Signal/Noise ratio (A-weighted ref 1W) 90dB Frequency response 20Hz - 20kHz / ±0.5dB Tone controls Treble ±7dB at 10kHz Bass ±10dB at 50Hz POWER AMP SECTION Continuous output power into 8½* 25W (14dBW) Rated distortion (THD 20Hz - 20kHz) 0.02% Clipping power (maximum continuous power per channel) 30W IHF Dynamic headroom at 8½+3dB IHF dynamic power (maximum short term power per channel) 8½50W 4½55W 2½70W Input impedance 11k½ Input sensitivity (for rated power into 8½) 1V Frequency response 10Hz - 70kHz THD (20Hz - 20kHz) <0.02% Remote No NAD Link No PHYSICAL SPECIFICATIONS Dimensions (W x H x D) 420 x 96 x 240mm Net weight 5.3kg Shipping weight 6.7kg Power consumption (120 ~ 240V, 50/60Hz) 150VA * Minimum power per chnnel, 20Hz - 20kHz, both channels driven with no more than rated distiortion. Dimensions are of unitÕs cabinet without attached feet; add up to 18mm for total height. Dimension depth excludes terminals, sockets, controls and buttons. © NAD Electronics. All rights reserved. E & OE