| Form Factor | Floorstanding |
| Signal Path | Analog Hardware |
| Dimensions | 71.1 × 76.8 × 48.9 cm (W × H × D) |
| Weight | 123lbs |
| Power | 120VAC, 50/60Hz 17W (Idle), 90W (30W) 135W (Max) |
| Frequency Response | 35Hz-20kHz |
| Treble | 8.6"x18.4" Sectoral Horn (Altec 811B, Altec 807-8A) |
| Midrange/Bass | 15" Paper Cone (Altec 422-8Z) |
| Crossover Frequency | 800Hz (User Selectable) |
| Crossover Slope | 12dB/Oct |
| Maximum Output (Direct Input, 500Hz-3kHz, 0.5V Input, 4') | 117.5dB |
| Maximum Output (High-Level Balanced-Line Matched Input, 500Hz-3kHz, 0.5V Input, 4') | 117dB (Transformer: Altec 15335) |
| Maximum Output (High-Level Balanced-Line Bridging Input, 500Hz-3kHz, 0.5V Input, 4') | 116dB (Transformer: Altec 15095A) |
| Amplifier | Altec 771B |
| Output Power (Treble, 8Ω) | 30W |
| Output Power (Bass, 8Ω) | 60W |
| Input Sensitivity | 0.5V |
| Input Impedance | 15kΩ |
| THD (Treble) | 0.5% |
| THD (Bass) | 0.5% |
| SNR | 80dB |
| Damping Factor | 25 |
| Enclosure Type | Bass Reflex |
| Enclosure Construction | 0.75" Plywood |
| Finish | Black Epoxy Splatter |
| Connections | - Input · 1/4" Phone Jack (6.35mm)
- Input · Terminal Block
|
| Notes | Powered version of the 1218A using 771B biamplifier. |
