What is the on the pair you are looking at?
10-inch (25 cm) cast-frame low-frequency driver with a high-excursion red foam surround.
While the AT-40 can handle any audio source, they truly shine with genres that rely on dynamics and low-frequency energy: cerwin vega at40 specs
The AT-40 is a three-way, bass-reflex design, a configuration Cerwin Vega has long mastered. The specifications begin with the low-frequency driver: a . Unlike cheaper stamped steel frames, the cast frame ensures rigidity, reducing unwanted resonances at high volumes. This woofer features the iconic Cerwin Vega "red surround"—a treated foam or cloth roll that is notably more durable and compliant than standard foam, allowing for the extreme cone excursion required to produce the brand's signature "heart-thumping" bass. The spec sheet lists the woofer's impedance at 8 ohms (nominal), making the AT-40 an easy load for most receivers and amplifiers.
The company’s commitment to realistic, impactful sound reached a cultural peak in the 1970s when it co-developed "Sensurround," a low-frequency effects system used in the 1974 disaster film Earthquake to create physical vibrations in movie theaters. This expertise in powerful, low-distortion bass would become the signature trait of their consumer products for years to come. The AT-40 speakers are a prime example of that legendary design philosophy, belonging to a lineage of speakers built to rock. What is the on the pair you are looking at
If you are shopping the secondhand market (eBay, Facebook Marketplace, Craigslist) for a pair of Cerwin-Vega AT-40s, keep the following checklist in mind:
, as the original orange material tends to deteriorate over several decades. Are you planning on a vintage pair or looking for a compatible amplifier to drive them? Cerwin Vega AT-40 - Classic Audio The specifications begin with the low-frequency driver: a
Vocals and instruments are handled by a dedicated midrange driver crossing over at . This frees the woofer to focus entirely on low-end frequencies. The high frequencies are handled by a crisp, high-efficiency tweeter that carries the signal up to 22 kHz . The crossover transition at 3,000 Hz ensures that critical vocal ranges remain smooth and coherent. 3. PTC Protection Circuitry