RS-4000
| Brand | Infinity |
| Function | Speaker |
| Produced | 1988 |
| Country | United States |
| Model ID | Reference Standard 4000 |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 31.8 × 57.1 × 26 cm (W × H × D) |
| Frequency Response | 44Hz-32kHz ±3dB |
| Tweeter | EMIT-k* (PN 902-2645) |
| Midrange | 3.5" Polypropylene Cone (PN 902-2652) |
| Woofer | 8" Polypropylene Cone (PN 902-2666) |
| Crossover | 500Hz, 5kHz |
| Sensitivity | 89dB/W/M |
| Impedance | 6Ω |
| Recommended Amplifier Power | 20-125W |
| Color Options | Oak |
| MSRP | $470 |
| Connections |
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| Controls |
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| Notes | *Electromagnetic Induction Tweeter |