: 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 acoustic tuning makes the AT-40 highly synergetic with high-energy genres like classic rock, hip-hop, electronic dance music, and action movie soundtracks. Ownership and Maintenance Tips
The core appeal of the Cerwin-Vega AT-40 lies in its impressive electrical efficiency and massive headroom. Unlike modern low-sensitivity bookshelf speakers that require high-current amplifiers, the AT-40 can reach party-level volumes with a modest power source. 📊 Technical Spec Sheet Specification 3-Way Bass Reflex (Ported Enclosure) Frequency Response 30 Hz – 22 kHz Power Handling Capacity 125 Watts (Continuous RMS) Sensitivity (1W @ 1M) Nominal Impedance Crossover Frequencies 400 Hz / 3,000 Hz High Frequency Protection PTC (Positive Temperature Coefficient) Automatic Reset Cabinet Dimensions (H x W x D) 730 mm x 365 mm x 320 mm (approx. 28.7" x 14.3" x 12.6") Drivers and Acoustic Architecture cerwin vega at-40 specs
| Specification | Detail | | :--- | :--- | | | 3‑way, bass‑reflex (rear‑ported) floorstanding loudspeaker | | Woofer | 10‑inch (25 cm) treated foam surround woofer | | Tweeter | 1‑inch titanium dome tweeter (similar to later CV designs) | | Midrange Driver | 3‑inch or 4‑inch cone driver (information varies) | | Frequency Response | 30 Hz – 20,000 Hz (±3 dB) | | Nominal Impedance | 8 ohms | | Power Handling | 150 watts RMS (estimated) / 300 watts peak (based on comparable period CV models) | | Sensitivity | 90 dB / 1W / 1m (estimated) | | Dimensions (H x W x D) | 73 cm × 36 cm × 35 cm (28.7″ × 14.2″ × 13.8″) | | Weight | 18 kg (39.7 lbs) per speaker | | Year of Production | Approximately 1989 |
: Operating from 3,000 Hz up to 22 kHz, the tweeter fills out upper harmonics. It reproduces crisp, sharp highs that remain defined even when driving the speakers at high sound pressure levels (SPL). Cabinet Build : Like many vintage Cerwin-Vega speakers, the original
The AT-40 is unashamedly voiced for impact, energy, and excitement. It excels at genres like classic rock, heavy metal, hip-hop, electronic music, and home theater applications. The bass is punchy and forward, the midrange is aggressive and clear, and the highs are crisp. While audiophiles seeking a perfectly flat, analytical studio monitor might find the AT-40 slightly "colored," music lovers looking for a live concert experience in their living room will find them incredibly satisfying. Buying Vintage: What to Look For and Common Restorations
High efficiency, often above 95 dB (1w/1m), meaning they play loudly with lower power amplifiers. It reproduces crisp, sharp highs that remain defined
Note: Specifications can vary slightly depending on the specific production year and revision of the speaker.
: 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 :
Below is the official specification sheet for the Cerwin Vega AT-40. Note that these figures are from original Cerwin Vega literature. Variations may exist in different production runs (e.g., early vs. late 1990s models).
Most modern bookshelf speakers average 85–87 dB sensitivity. That means to achieve the same volume as the AT-40, they need roughly 4 to 5 times more amplifier power.