Cerwin Vega At40 Specs Fix «2027»
Bass Reflex (Ported design with a rear-firing tuned port) Cabinet Dimensions & Weight Height: 25.5 inches (64.8 cm) Width: 12.5 inches (31.8 cm) Depth: 11.25 inches (28.6 cm) Weight: Approximately 35 lbs (15.9 kg) per cabinet Part 2: Common Issues and How to Fix Them
The Cerwin Vega AT-40 was part of the "Active Tuned" (AT) series, which featured front-firing bass ports and level controls for the midrange and tweeter. The table below compiles its official technical details from verified sources.
The most common "fix" for any vintage Cerwin Vega is replacing the orange foam surrounds on the woofers. Over 20+ years, this foam becomes brittle and crumbles, leading to air leaks and potential voice coil damage.
(Positive Temperature Coefficient) circuit protector for the tweeter. Dimensions : Approximately Classic Audio The "Fix": Common Maintenance Issues cerwin vega at40 specs fix
Apply a thin bead of speaker repair glue to the inner lip of the new foam surround and the outer edge of the paper cone. Center the foam perfectly and press it down gently. Let it dry for 1–2 hours.
The AT-40 was designed for listeners who value volume and physical impact. Its high efficiency means it can produce massive sound pressure levels even with relatively modest amplification. 35 Hz – 28 kHz Power Handling: 5W Minimum / 125W Maximum Sensitivity: 95 dB (1 Watt @ 1 Meter) Nominal Impedance: 6 Ohms Crossover Frequency: 3000 Hz Woofer: 10-inch cast aluminum frame with red foam surround Midrange: 5-inch cone Tweeter: 1-inch polycarbonate dome Cabinet Design: Bass reflex (ported) Dimensions: 30" H x 12.75" W x 11.5" D Weight: Approximately 40 lbs each Common Issues and Fixes
Before attempting any modification, diagnostic test, or repair, you must know the exact technical boundaries of the loudspeaker. Audio & Performance Specs 30 Hz – 28 kHz Power Handling: 5 Watts minimum – 150 Watts maximum RMS Sensitivity (1W/1m): 97 dB Nominal Impedance: 6 Ohms Crossover Frequencies: 400 Hz and 3,000 Hz Driver Complement Bass Reflex (Ported design with a rear-firing tuned
Comprehensive Troubleshooting and Restoration Guide for Cerwin-Vega AT-40 Speakers
Access the crossover board attached to the inside of the rear terminal cup.
The most frequent issue with vintage Cerwin Vega speakers is "foam rot," where the original red foam surrounds disintegrate over time. Cerwin-Vega AT-100 Loudspeakers (Vintage) Over 20+ years, this foam becomes brittle and
Unscrew the mounting screws securing the 10-inch woofer to the cabinet. Carefully lift the driver out and label the positive (+) and negative (-) wires before disconnecting them.
Reseal the interior seams with wood glue or silicone caulk. To refresh the look, strip the old grille cloth from the wooden frames and stretch new acoustically transparent fabric over them, securing it with heavy-duty staples. Testing Your Restored Speakers
The AT-40 has built-in circuit protection. If the entire speaker goes quiet after a heavy session, check the fuse holder on the back.
For detailed schematics or user-contributed repair guides, communities like or dedicated Cerwin-Vega forums
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