Vintage Boutique Tour
Liam will walk you through the Infinity Quantum Jr..
A narrated 4-scene walk-through by your host — quirks, sound, and fair value.
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Sponsored · eBay
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Premium AI Voice Guide
PROLiam's bench-side rundown of the Infinity Quantum Jr..
Real-time streaming voice — specs, history, restoration pain points, market value.
Sonic Similarity Analysis
Both speakers emphasize detail retrieval and transparency with advanced tweeter technology—the Infinity's planar EMIT and Polk's ring radiator both deliver extended, airy highs. The Reserve R200 matches the Quantum Jr.'s ability to reveal subtle musical nuances while adding modern dynamics and power handling.
Infinity Quantum Jr.
vs.
Polk Reserve R200
86 dB
Sensitivity
88 dB
4–4 Ω
Impedance
8–8 Ω
25–150W
Power Handling
30–200W
2-way
Driver Count
2-way
EMIT planar tweeter, 10in servo-controlled woofer
Driver Config
1in pinnacle ring radiator tweeter, 6.5in turbine cone woofer
Sealed
Enclosure
Bass-reflex
Bookshelf
Size
Bookshelf
28Hz – 32kHz
Frequency Response
48Hz – 40kHz
42 lbs
Weight
18.5 lbs
Vintage (used avg)
$800
Modern (new)
$700
Difference
$100less new
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