Amplifier Test Clinic
Saturday November 22, 12:00 Noon to 6:00 PM at Boston Audio Society, Wayland, MA
Read more at bostonaudiosociety.org

On November 22 Boston Audio Society will hold another pace setting series of tests in an effort to help consumers choose the best amplifier for audio playback or to uncover a reference amplifier with standards that lead the industry. The primary test tool will be the PowerCube from AudioGraph. Sign up here!

Stand Alone System:
Power Cube

The Power Cube Stand Alone system produces high quality, unique 3D-measurements – an integrated part of development and production cycle at world’s leading audio manufacturers.

With Audio Precsion:
Active Loadbox

Audio Precision has written a utility that allows APx to control a the Active LoadBox dynamic load tester, for a real-world view of your power amplifier designs.

The Active LoadBox
Utility integration

Audio Precision’s Active LoadBox Utility integrates Audio Graph’s Active LoadBox with APx, providing automated and comprehensive resistive and reactive load measurements.

About Us

Swedish company AudioGraph, the home of the PowerCube, continues to
develop measurement tools for the audio industry.
AudioGraph created the de-facto business standard
3-D measurement graphs – easy-to-read yet very powerful.

Located in Linköping, Sweden, we continue to
develop tools for the audio industry.

  • Dowloads and documentation

    On our Download page you will find documentation, brochures, leaflets and manuals covering all our products and services.

  • Representation

    Complete list of representation worldwide for AudioGraph product line.

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The Graph

Example: PowerCube graph of an amplifier with current limiting

To read the graph, note that the results in the center are purely resistive, with higher impedances in the back and lower impedances in the front. Moving to the left of center adds capacitance (current leads voltage by 30° and 60° @ 1 kHz), and moving to the right adds inductance (current lags voltage by 30° and 60° @ 1 kHz). Because actual speaker impedance can vary greatly from the nominal rating, it’s important to observe the results over the entire graph.

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