followed the classic Cerwin-Vega formula: high sensitivity and massive bass in a relatively efficient package

Warning : The Achilles’ heel of old CV speakers is the foam surround on the woofer. After 20-30 years, the foam rots. If you’re buying used AT-40s, factor in a re-foam kit (~$30-50 per pair).

was the mid-sized warrior of that mission. While its larger siblings like the AT-100 (AT-15) were massive "monkey coffins," the AT-40 provided a more manageable footprint without sacrificing the signature orange-ringed woofer These speakers were often built under license at the Dali factory in Denmark

The is amplifier-friendly. Most solid-state receivers from the 1990s onward will have no trouble driving these. The crossover points— 500 Hz and 5 kHz —are well chosen. The woofer handles the lower frequencies where cone breakup isn’t an issue, the midrange covers the entire vocal and upper bass region, and the tweeter only handles the top octaves. This results in smooth polar response.

: Features PTC (Positive Temperature Coefficient) protection to prevent damage from power surges or overdriving. Performance Profile

: 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 :