Mackie FRS 1700 Power Amplifier

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a high current switching power supply that is super efficient, and also ultra lightweight, so you get maximum power with minimum load in strain. Sophisticated protection ensures your FRS will always perform reliably, and that it will stay with you for the long haul. Stack them up against any competitor, and youll see, the FRS amps are simply the highest performing power amps in their class. Fast Recovery, Fast Response FRS amps feature sophisticated Fast Recovery circuitry for the cleanest sound around. At Mackie, we know that most folks run their amps right up to clipping levels, so we design our amps to handle this kind of real world abuse. What we came up with is circuitry that allows the FRS amps to deliver ultimate power, without sacrificing sound quality. When you overdrive an amp with a traditional negative feedback design into clipping mode, it creates a feedback loop whereby even once you remove the input signal, the sub stages of the circuits remain in saturation mode, causing all sorts of nasty harmonic distortion. The Fast Recovery technology in the FRS amps ensures all these sub stages stay out of saturation, so even when the amp is driven into clipping mode, it instantly recovers, avoiding the latching phenomenon altogether. The result is ultra clean, distortion free sound. Read more. Ultra Efficient, Lightweight Power Supply The resonant switching power supply in our new FRS amps provides many sonic and practical advantages. Being much more compact and weighing considerably less than a conventional linear supply, it helps make our FRS amps super lightweight and ultra portable. And while switching supplies are becoming more and more popular these days due to their more compact topology, not all switching power supplies are the same. Many of our competitors use switching power supplies that employ hard switching. With this design, at switching, voltage is present across the transistor and current is running through it, generating glitch energy that can cause unwanted noise in the form of Radio Frequency Interference RFI, as well as excess heat. The FRS power supply employs soft switching. The soft switching design includes a resonant tank that allows the power transistors to switch at zero current and zero voltage. This design ensures that when the transistors switch, very little heat or errant energy is generated, so the FRS amps run quiet as a mouse, and cool as a cucumber. This not only means better s
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