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Knowledge Base > Discontinued Products > 420 Stereo Power Amplifier

How can I use the 420 Stereo Power Amplifier for a headphone amp?

The 420 is ideally suited to headphone distribution systems. There are two basic strategies involved in making a loud headphone system:

1. If you have low impedance phones, then you need high current capability to make them loud. This translates to a modest 8 Ohm power rating, like 20 watts.

2. If you have high impedance phones, then you need high voltage capability to make them loud. This translates to a moderate 8 Ohm power rating, like 100 watts

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