AR-11 Visible Speaker
| Brand | Acoustic Research |
| Manufacturer | Teledyne Acoustic Research |
| Function | Speaker |
| Produced | 1977 |
| Country | USA |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Analog Hardware |
| Dimensions | 35.4 × 63.5 × 27.3 cm (W × H × D) |
| Weight | 49.75lbs |
| Treble | 0.75" Dome |
| Midrange | 1.5" Dome |
| Bass | 12" Paper Cone |
| Sensitivity | 86dB/W/m |
| Impedance (Nominal) | 4Ω |
| Crossover Frequencies | 525Hz, 5kHz |
| Oscillator Frequency | 3Hz |
| Enclosure Type | Sealed |
| System Resonance | 42Hz |
| System Q | 0.7 |
| Enclosure Volume | 41.9l |
| Notes | Dealer demonstration cutaway model with metal stand, informational sign and oscillator/amplifier to excite woofer at 3Hz for 1" peak-to-peak excursion. |