Quantum 3
| Brand | Infinity |
| Function | Speaker |
| Produced | 1977 to 1982 |
| Country | United States |
| Model ID | QLS-3 |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Dimensions | 45.7 × 101.6 × 33 cm (W × H × D) |
| Weight | 110lbs |
| Frequency Response | 28Hz-32kHz ±3dB |
| Tweeter (Front) | 2x EMIT* (PN# 902-2252) |
| Midrange | 1½" Dome (PN# 902-0206) |
| Midbass Coupler | 4" Philips AD 5060/W8 (PN# 902-0151) |
| Woofer | 12" Infinity/Watkins Dual-Drive (PN# 902-1180) |
| Crossover Points | 200Hz, 600Hz, 4kHz (1st Order) |
| Horizontal Dispersion | -2dB @ 60°, 20kHz |
| Impedance | 4Ω |
| Recommended Amplifier Power | 35W-250WRMS |
| MSRP | $1050/pr |
| Connections |
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| Controls |
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| Notes | *EMIT (ElectroMagnetic Induction Tweeter) Veneer: Walnut only |