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YORKVILLE AP1020 DetailsAP Series AP Series Overview Yorkville’s AudioPro AP-Series power amplifiers are designed for rock solid performance right down to and below their lowest impedance ratings. An ‘impedance aware’ design strategy deals with the realities of driving typical reactive speaker loads and they address the associated problems such as thermal shutdown, inductive 'snap-back', and premature current limiting. They will easily drive reactive phase shifted loads with no difficulty - even though they are still fully protected from accidental short circuits. AudioPro amplifiers feature advanced protection schemes including DC current, load, thermal and breaker protection as well as a user-defeatable peak limiter that is transparent below clipping levels. A ‘soft turn-on’ circuit eliminates damage to attached components and prevents nuisance breaker-tripping. The computer-optimized (Silentfan™) front-to-back heat dissipation system incorporates ultra-quiet, variable-speed internal fans and are designed to ensure that excessive thermal stress will not occur. For ease of maintenance and to ensure efficient cooling, the amplifiers are supplied with long-life, faceplate-mounted, user serviceable, air intake filters. Front panel Power, Protect, Activity and Clip LED's are bright and easy to see and all knobs and handles are recessed for safe, easy transportation. The internal signal path has been optimized and a toroidal transformer is used – both of which serve to reduce hum and noise while keeping weight to a minimum. The two-tier power conversion of the AudioPro AP-Series amplifiers approaches efficiency levels normally associated with switching power supply technology; yet provide the superior transient response and low distortion of the best analog designs. AudioPro amplifier designs, while unique, are conservative with regard to the power handling capabilities of the output devices. To further assure trouble-free operation, all AudioPro amplifiers undergo a thorough computer-monitored, temperature-cycled, burn-in period to test for any deviation from design parameters. The back panel features Speakon™ and binding post outputs as well as balanced XLR & ¼" TRS inputs. The peak limiter, subsonic filter, mono/stereo/bridge mode and ground lift switches are also mounted on the back panel. The unique Yorkville Impedance Mode switch (AP800 & AP2020), also located on the back panel, allows the user to select full output power into two or four ohms for maximum application flexibility. Sturdy all-steel construction with a baked-on, black finish is used throughout and, for ease of integration, the amplifiers feature reinforced mounting ears and a compact two or three rack-space design. All AudioPro amps come with Yorkville's standard two-year (even if you break it!) transferable warranty (valid in USA and Canada only). The Limiter Switch All AudioPro power amplifiers have a user defeatable limiter circuit switch located on the back panel, next to the input jacks. That limiter is there to protect high frequency loudspeaker components that could be damaged by even small amounts of clipping when an amplifier is being driven close to its maximum output into a full-range cabinet. When driving subwoofers at the maximum rated output power of the amplifier however, allowing a small amount of clipping at the output of the amplifier is considered an excellent trade-off to get a potential 2dB or 3dB increase in volume, and a small amount of clipping will not damage low frequency drivers. Defeating that limiter allows AudioPro amplifiers to run closer to clipping, and increases the audible volume by potentially as much as 3dB. Competitive amplifiers without user defeatable limiting either, A) Set their limiting too high to actually offer any practical real-world high frequency component protection, or B) Set their limiting so low that they limit the amplifier’s overall potential headroom. When comparing AudioPro AP-Series amplifiers to any competitive product, remember to turn the limiter off to feel the increased output when driving subwoofers. However, please note, you should remember to use the limiter when driving full range cabinets. You are less likely to do high frequency component damage with that limiter set to ‘on’. AP Series Characteristics
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Yorkville AP1020 Power Amp
Inputs
Inside
WHIRLWIND SPKR CABLE 25'14G BAN/1/4 
