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A genuine Signetics NE5532N in PDIP package, made in 1990, on a modem board A Texas Instruments SA5532A in SOIC package on an audio distribution amplifier board . The NE5532, also sold as SA5532, SE5532 and NG5532 (commonly called just 5532) is a dual monolithic, bipolar, internally compensated operational amplifier (op amp) for audio applications introduced by Signetics in 1979.
Passive crossovers may use capacitors made from polypropylene, metalized polyester foil, paper and electrolytic capacitors technology. Inductors may have air cores, powdered metal cores, ferrite cores , or laminated silicon steel cores, and most are wound with enameled copper wire.
Power capacitors, motor capacitors, DC-link capacitors, suppression capacitors, audio crossover capacitors, lighting ballast capacitors, snubber capacitors, coupling, decoupling or bypassing capacitors. Often, more than one capacitor family is employed for these applications, e.g. interference suppression can use ceramic capacitors or film ...
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The transition between the two modes generates harsh crossover distortion. A less radical but linear approach suggests connecting a large-value capacitor between the bases of T2 and T4; the addition transforms T1, T3 into a true push-pull pair, doubling AC base current of the output stage. [28]
Fortunately, replacement of the edge can be done by speaker repair shops and the woofer can then continue working well. The frequency response of the woofer is rated down to 28 Hz, making the NS-2000 a full-range speaker that may not need a separate subwoofer for low frequencies. The crossover starts at 500 Hz.