Please note: The AT series (including the AT-40) was produced in the mid to late 1990s as a consumer "home stereo" tower. It is distinct from the later "XLS" or "Classic" series.
High frequencies from 3,000 Hz up to 22 kHz are reproduced by a 1-inch dome tweeter. This tweeter is engineered for wide dispersion, meaning the speaker maintains a broad sweet spot in a living room or garage setup. Performance and Sound Signature
: 95 dB (1W/1m), indicating it is highly efficient and can be driven easily by lower-powered amplifiers. Nominal Impedance : 6 Ohms. Crossover Points : 400 Hz and 3,000 Hz. Physical Characteristics Dimensions : cerwin vega at-40 specs
: Like many vintage Cerwin-Vega speakers, the original foam surrounds on the woofers are prone to "foam rot" over time and frequently require refoaming to maintain performance. AT-40 - Products - Fohhn Audio
The internal crossover network splits signals at and 3000 Hz using clean slopes to manage driver transitions smoothly. To protect the voice coils from damage during heavy parties or accidental clipping, Cerwin-Vega integrated an internal PTC (Positive Temperature Coefficient) protection circuit . If the tweeter gets too hot from excessive power, the PTC safely restricts current until temperatures drop, acting as an automatic fuse. 3. Bass-Reflex Enclosure Construction Please note: The AT series (including the AT-40)
The cabinet is constructed from 3/4" MDF with internal bracing. At 52 lbs each, they are solid but not impossible to move. The vinyl veneer finish is functional but not high-end furniture grade—these are workhorse speakers, not art pieces.
The tonal signature is unashamedly robust. While modern audiophile speakers lean toward a flat, analytical response curve, the AT-40 prioritizes energy, punch, and scale. It excels at playing rock, hip-hop, electronic music, and home theater soundtracks where impact and deep low-frequency extension are critical. Features and Adjustments This tweeter is engineered for wide dispersion, meaning
: Because they are highly efficient, they don't require massive amplifiers to play loud, though they thrive when given high-current power to keep the bass "tight". Why They Still Matter Cerwin Vega Fanz - Facebook
: Cerwin-Vega integrated a self-resetting PTC resistor circuit. If you push the volume too high and the amplifier begins to clip, the PTC acts as an internal insurance policy, temporarily absorbing the excess heat to protect the tweeter from blowing out. Sound Performance Profile