Vintage Boutique Tour
Liam will walk you through the Infinity Quantum Line Source.
A narrated 4-scene walk-through by your host — quirks, sound, and fair value.
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Premium AI Voice Guide
PROLiam's bench-side rundown of the Infinity Quantum Line Source.
Real-time streaming voice — specs, history, restoration pain points, market value.
Sonic Similarity Analysis
Both speakers use planar magnetic technology to achieve transparency and coherence impossible with conventional dynamic drivers. While the Quantum was a flagship line-source design, the LRS+ delivers similar planar clarity and airy presentation at an affordable price, both requiring capable amplification and careful room placement to shine.
Infinity Quantum Line Source
vs.
Magnepan LRS+
85 dB
Sensitivity
86 dB
4–4 Ω
Impedance
4–4 Ω
50–300W
Power Handling
50–200W
15-way
Driver Count
2-way
13x EMIT planar tweeters/mids, 2x 12in servo woofers
Driver Config
True ribbon tweeter, quasi-ribbon planar magnetic woofer/mid
Sealed
Enclosure
Open-baffle
Floorstander
Size
Floorstander
25Hz – 32kHz
Frequency Response
45Hz – 25kHz
175 lbs
Weight
24 lbs
Vintage (used avg)
$3,000
Modern (new)
$995
Difference
$2,005less new
Cross-Match Engine · Pro
What pairs with this?
Reverse-match works both ways. Point us at a receiver and we surface compatible vintage speakers and turntables — matched on power, impedance, and era. Point us at a pair of speakers and we surface receivers with enough headroom to drive them cleanly. Available on Pro and Flipper Pro.
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