Yet another important spec is called damping factor, which is the ratio of the speaker's input impedance (its resistance to electric current from the amp) and the amp's output impedance. The slew rate of the Outlaw 7500 is 50 volts/microsecond, a very respectable specification. This is a measure of how fast the amp can increase the output voltage, and it portends rapid transient response. Slew rate is another important specification, often overlooked in spec sheets. The Outlaw 7500 has a crosstalk specification of -100dB between channels, which is very good. Simply stated, a differential amplifier employs a technique called common-mode rejection, which reduces crosstalk between channels and improves transient signal response. The 7500 employs a differential circuit design. This is an important specification-many amps are measured while driving only one channel, which doesn't reveal their true performance while reproducing demanding multichannel music and home-theater sources. The Outlaw 7500 utilizes dual toroidal power supplies with multiple windings for each channel, and it's spec'd to deliver 200 watts to each of five channels driven simultaneously into 8 ohms. Does it deliver the goods? Let's find out. It's a heavy, beefy amplifier with high-performance features and impressive specs at a down-to-earth price. Outlaw Audio, an online seller of power amps, preamp/processors, A/V receivers, speakers, and subwoofers, offers the Model 7500 5-channel power amp among others. As such, the power amp is where the rubber meets the road. It must amplify a very small audio signal without changing the signal's characteristics, it must precisely control each speaker in the system, and it must instantaneously deliver adequate voltage and current to each speaker on demand. A power amplifier is the last electronic component in the audio chain-well, next-to-last if you count the speakers-and it has several important tasks.
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