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Cerwin Vega At40 Specs Portable Official

Cerwin-Vega AT-40 Go to product viewer dialog for this item.

is a legendary member of the AT (Advanced Technology) series, a lineup that epitomized the brand's reputation for high-efficiency, "party-ready" sound in the late 1980s and early 1990s. Known for their punchy bass and signature orange surround, these speakers were designed to deliver high sound pressure levels (SPL) even when paired with modest amplifiers. Technical Specifications Go to product viewer dialog for this item.

is a three-way, floor-standing loudspeaker featuring a bass-reflex design. Specification Frequency Response 30 Hz – 22 kHz Power Handling 125 Watts (RMS/Peak capability) Sensitivity 95 dB (1 Watt @ 1 Meter) Nominal Impedance Crossover Points 400 Hz / 3,000 Hz HF Protection Self-resetting PTC circuit breaker Dimensions (H x W x D) 730 mm x 365 mm x 320 mm (~28.7" x 14.4" x 12.6") Driver Configuration

Woofer: 10-inch high-excursion driver with a cast aluminum frame and the iconic red/orange foam surround.

Midrange: 5-inch cone driver designed to handle the critical vocal frequencies.

Tweeter: 1-inch Mylar or phenolic dome tweeter with high-frequency level controls for fine-tuning the "sizzle". Audio Performance & Legacy Go to product viewer dialog for this item. cerwin vega at40 specs

sits in the middle of the AT series, offering a more compact footprint than the massive AT-15 or AT-100 while still providing significantly more "kick" than the entry-level bookshelf models.

Efficiency: With a 95 dB sensitivity rating, these speakers can reach high volumes with very little power, making them a favorite for vintage receivers.

Sound Profile: They are characterized by a "V-shaped" sound signature—emphasized bass and crisp highs. While they may lack the pinpoint imaging of modern audiophile monitors, they excel at filling large rooms with dynamic, high-impact sound.

Build: The cabinets were often built with thick particle board or plywood, frequently finished in wood-grain vinyl or veneer. Some European models were licensed to the Dali factory in Denmark, utilizing American-made drivers in European-built cabinets.

For enthusiasts looking to restore these, high-quality re-foaming kits are widely available through retailers like Simply Speakers or The Speaker Exchange, as the original foam surrounds tend to degrade after 20–30 years. These Speakers Absolutely Changed My Life Cerwin-Vega AT-40 Go to product viewer dialog for this item

Note on Model Identification: The "AT" series (including the AT-40) is distinct from the more common "AT" (Acoustic Thunder) series from the late 1980s/early 1990s. The AT-40 is a later model (circa late 1990s to early 2000s), often considered part of the "Intensity" or transitional series, featuring a more modern, curved cabinet design while retaining Cerwin-Vega's signature high-efficiency, high-output philosophy.

Cerwin-Vega AT-40 Specifications

| Specification | Details | | :--- | :--- | | System Type | 3-Way, Bass Reflex (Front-firing port) | | Woofer | 10" (250mm) Part No. 1210 (Red Foam Surround) | | Midrange | 4.5" (114mm) Cone type | | Tweeter | 1" (25mm) Soft Dome | | Frequency Response | 38 Hz – 20 kHz (± 3 dB) | | Power Handling (RMS) | 100 Watts | | Power Handling (Peak) | 200 Watts | | Sensitivity (1W/1m) | 98 dB | | Nominal Impedance | 8 Ohms (compatible with 4-8 ohm outputs) | | Crossover Frequencies | 800 Hz / 5,000 Hz | | Recommended Amplifier Power | 20 – 200 Watts per channel | | Enclosure Material | Vinyl-laminated MDF | | Dimensions (H x W x D) | 25.5" (648mm) x 14.5" (368mm) x 12.5" (318mm) | | Weight (each) | Approx. 42 lbs (19 kg) |

2. General Specifications

| Parameter | Specification | |-----------|----------------| | Configuration | 3-way, bass reflex (ported) | | Recommended Amplifier Power | 20 – 200 Watts RMS | | Sensitivity (1W/1m) | 95 dB | | Nominal Impedance | 8 Ohms | | Frequency Response | 32 Hz – 20 kHz (±3 dB) | | Crossover Frequencies | 500 Hz / 3.5 kHz | | Peak Power Handling | 300 Watts | | Enclosure Type | Vented (rear-firing port) | | Binding Posts | Dual 5-way binding posts (bi-wire/bi-amp capable) |

5. Enclosure & Physical Dimensions

  • Type: Floor-standing, rear-ported bass reflex.
  • Cabinet Material: 0.75-inch (19 mm) MDF (Medium Density Fiberboard) with internal bracing.
  • Finish: Black ash vinyl wrap (standard) or black paint (limited editions).
  • Grille: Black cloth, removable (acoustically transparent mesh).
  • Dimensions (H x W x D): 37.5 inches (953 mm) x 12.5 inches (318 mm) x 14.75 inches (375 mm)
  • Weight: 48 lbs (21.8 kg) each

Sensitivity & Amplifier Matching

At 91dB @ 1W/1m, the AT-40 is efficient but not ultra-efficient. You don't need a 200-watt monoblock. A solid 30-50 watt vintage receiver (Pioneer SX-*50 series, Marantz 22xx) will drive them to deafening levels in a small room. However, they love current. A 75-watt high-current amplifier (like an Adcom GFA-535 or NAD 3020) produces tighter bass than a 100-watt budget receiver.

Warning: The AT-40’s impedance dips to 5.2 ohms at 120Hz. Some low-end AV receivers may struggle. Stick to 6-8 ohm stable amplifiers. Cerwin-Vega AT-40 Specifications | Specification | Details |

3. Crossover Capacitors

The electrolytic capacitors in the crossover (600 Hz / 4,500 Hz) drift out of value.

  • Symptom: Harsh sounding or missing midrange.
  • Fix: Replacing the 20-year-old caps with polypropylene film caps will make the speaker sound like the day it left the factory.

Part 1: Official Cerwin Vega AT-40 Specifications

Here are the factory specs as published in the original Cerwin Vega product literature (circa 1988-1991). Note: Some values vary slightly between the early and late production runs.

| Specification | Detail | | --- | --- | | System Type | 3-way, bookshelf / stand-mount monitor, bass reflex | | Woofer | 8" (203mm) cast polymer frame, high-excursion, butyl rubber surround | | Midrange | 4" (100mm) treated paper cone with sealed back chamber | | Tweeter | 1" (25mm) soft dome ferrite magnet (some variants had a phenolic ring radiator) | | Frequency Response | 45 Hz – 20 kHz (± 3 dB) | | Sensitivity | 91 dB (1W/1m) | | Nominal Impedance | 8 ohms (minimum 5.2 ohms @ 120 Hz) | | Power Handling (RMS) | 75 watts | | Power Handling (Peak) | 150 watts | | Crossover Frequencies | 600 Hz and 4,500 Hz | | Enclosure Tuning | 45 Hz (ported, rear-firing slot port) | | Dimensions (H x W x D) | 19.25" x 11.25" x 9.5" (489 x 286 x 241 mm) | | Weight (per speaker) | 28 lbs (12.7 kg) | | MSRP (1990) | $400/pair |

Bass Response

The Claim: 45Hz.
The Reality: Measurable output down to 42Hz, but with a steep drop below 50Hz. The rear-firing slot port requires at least 6 inches of space behind the speaker. Place them near a wall, and the bass jumps to a hearty 48Hz at usable levels. They won't shake your teeth, but for an 8" monitor, the kick drum has genuine thwack.

The Woofer (10" vs. 12")

Unlike the AT-60 which used a 12" woofer, the AT40’s 10" woofer is the star. The slightly smaller cone offers faster transient response (think tight kick drums) compared to the floppy 12". The 94 dB sensitivity means these speakers are loud. For perspective, a modern bookshelf speaker might be 85 dB; the AT40 is twice as loud at the same wattage.

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cerwin vega at40 specs