Information Cubed
The data acquired in the testing procedure is then graphed in the form of a
The Phase Angle is expressed on the horizontal axis, the Output Voltage is presented on the vertical axis and the Impedance is displayed on the Z axis. Output Power, in watts, is listed on the left hand side for each impedance at each phase angle.
Audio Graph – The PowerCube™
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| MODEL BEING | VOLTAGE FROM | x2 = STEREO |
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| TESTED |
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| BATTERY | MONO = BRIDGED MONO |
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| Amplifier: PUNCH 200.2 14.4V x 2 | Rated Power : 100 W @ 4 Ohms | |||||||
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| : ROCKFORD CORPORATION |
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| 8Ω | 85 | W |
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| 84 | W |
| POWER |
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| 0° | 84 | W |
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| IN |
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| 30° |
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| 84 | W | {WATTS |
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E | 60° | 86 | W |
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C | 4Ω | 162 | W |
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N | 157 | W |
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A |
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0° | 156 | W |
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D |
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30° | 157 | W |
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P E |
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60° | 162 | W |
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M | 2Ω | 273 | W |
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I | 258 | W |
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| 0° | 251 | W |
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| 4Ω | |
| 30° | 256 | W |
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| 60 | ° | 271 | W |
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| 2Ω | |
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| 0° |
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| 1Ω | 390 | W |
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| 1Ω | |||
| 356 | W |
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| 0° | 346 | W |
| PHASE{ANGLES |
| Impedance | ||
| 30° | 352 | W |
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| 60° | 390 | W |
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•Example of a Punch Amplifier PowerCube
50V
30V
10V
8Ω
O U T P U T V O L T A G E
What is an Amplifier?
An amplifier by definition is a voltage generating device, recreating the sig- nal which is input to it identically but with increased volume. It will be con- nected to a reactive load (the speaker). The impedance of this load and phase of the signal passing through the load will vary, dependent upon the frequency of the input signal (music).
Therefore, a perfect amplifier will be able to maintain the same output volt- age regardless of load characteristics and will not alter the signal it is repro- ducing. A perfect amplifier when measured by the Audio Graph PowerCube would present data that forms a perfect cube. Unfortunately, amplifiers are not perfect. The laws of physics generally prevent it. A great amplifier is about the best one can hope to attain.
As you can see by the PowerCube and as you will experience by listening, your Punch amplifier is a GREAT AMPLIFIER!
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