B-4000A Symphony No. 1 (Classic)
| Brand | Bozak |
| Manufacturer | R.T. Bozak Co. |
| Series | Symphony |
| Designer | Rudy Bozak |
| Function | Speaker |
| Produced | 1970-1974 |
| Country | United States |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Dimensions | 66 × 113 × 39.6 cm (W × H × D) |
| Weight | 165lbs |
| Frequency Response | 35Hz-20kHz |
| Treble | 2" Aluminum Cone (x4) (Bozak B-200Y) |
| Midrange | 8" Aluminum Cone (Bozak B-800A) |
| Bass | 12" Wool-Paper Multi-Fiber Cone (x2) (Bozak B-199A (B-207A Coaxial)) |
| Impedance (Nominal) | 8Ω |
| Crossover Frequency | 400Hz, 2.5kHz (Bozak N-105) |
| Crossover Slope | 6dB/Oct (First Order) |
| Power Handling (Program) | 100W |
| Finish | Walnut |