Home » Products » PowerCube® PowerCube® The AudioGraph® PowerCube® illustrates dynamic power capabilities of an amplifier. The PowerCube® tests an amplifier's ability to deliver linearly short term current into capacitive and inductive (not just resistive) speaker loads. These tests are designed to mimic an amplifier's ability to perform under real-world 4-ohm speaker loads. DO NOT follow the impedance loads illustrated in the charts - refer to your amplifier's owners manual for minimum "ohm" loads. Series: <Select> Punch® Amplifiers POWER Amplifiers POWER Amplifiers (fan cooled) 25 To LIFE. Amplifiers Model:   *discontinued model   Series: <Select> PDX Amplifiers V-Power Amplifiers KS Series Focal Power Profile Range A-Series Slash-Series ZX Series M Class Power Reference Thunder TA High-Perf. Amps XM Series Reference Model:   *discontinued model   For more detailed information regarding the PowerCube visit www.audiograph.se AudioGraph® & PowerCube® are registered trademarks of AudioGraph AB, Sweden. 600 S. Rockford Drive, Tempe, AZ 85281 - U.S.A. © 2008 Rockford Corp. All rights reserved.