The rear or front baffle of the AT-40 features an adjustable level control switch to tailor the tweeter output. Over time, dust and oxidation build up on the internal copper contacts, causing scratchy sound, intermittent audio dropouts, or a completely dead tweeter. Tools and Materials Needed: DeoxIT D5 electronic contact cleaner spray Phillips-head screwdriver Step-by-Step Restoration:
Once you have fixed the stock specs, here are two "pro" fixes to make them sound better than new. cerwin vega at40 specs fix
Comprehensive Troubleshooting and Restoration Guide for Cerwin-Vega AT-40 Speakers The rear or front baffle of the AT-40
: After 30+ years, the electrolytic capacitors in the crossover dry out, leading to dull high frequencies or "muffled" sound. 3-way acoustic suspension / bass reflex system Woofer:
Understanding the factory specifications is critical before attempting any repairs. These figures serve as your benchmark for a successful restoration. 3-way acoustic suspension / bass reflex system Woofer: 10-inch cast aluminum frame with red foam surround Midrange: 5-inch cone polymer-infused driver Tweeter: 1-inch micro-cell polymer dome tweeter Frequency Response: 38 Hz – 20 kHz Power Handling: 5W minimum to 125W maximum RMS Sensitivity: 96 dB (1 Watt / 1 Meter) Nominal Impedance: 6 Ohms Crossover Frequencies: 400 Hz and 3,000 Hz Cabinet Dimensions: 27" H x 14" W x 11.5" D Weight: Approximately 18.1 kg (40 lbs) per cabinet Common Issues and How to Fix Them
sensitivity), making them easy to drive even with modest receivers Classic Audio