Overview, Modifications, Upgrades and Experiments

• LA-4 Overview
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• LA-4 Original Article: Discovery
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• Modification PRICING and details
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• Silver- and Black-face Upgrade Procedure --- (payment and password required)
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• Black-face output amp mod --- (payment and password required)
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• Calibration Procedure --- (payment and password required)
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• LA-4 Experiments:  Includes Mic Preamp and Opto Speed, just for fun