The Paradigm Founder 40B is rated 4.1/5 for sound quality, #67 of 222 Large Size Bookshelf Speakers. See all Passive Home rankings for every top pick.
Prices on this page were last checked November 14, 2026 at 6:17 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Brand: Paradigm
#67 Paradigm Founder 40B: $2,399.98 per pair Audio Advice $1,199.99 eBay
Older model: the Paradigm Prestige 15B (rated 3.5/5). See every Paradigm Prestige and Founder generation.
Same family: the Paradigm Founder 80F (smallest floorstanding, estimated 4.2/5), the Paradigm Founder 100F (floorstanding, estimated 4.4/5), the Paradigm Founder 120H (largest floorstanding, estimated 4.6/5), the Paradigm Founder 70LCR (smaller center, estimated 4.1/5) and the Paradigm Founder 90C (larger center, rated 2.5/5).
Pros: A bookshelf speaker with very even, wide sound when toed in, high sensitivity, and phase aligning lenses over its drivers. A 6-inch aluminum-magnesium woofer and a 1-inch ceramic dome tweeter in a deep waveguide, with Paradigm’s perforated phase-aligning lenses over both. Toed in 30 degrees as Paradigm recommends, Erin’s Audio Corner measured an exceptionally even listening window, within a 1.7dB span from 300Hz to 5kHz, with low on-axis deviation (0.36) and wide horizontal dispersion averaging 60 degrees, for a preference score of 4.89 that rises to 7.11 with an ideal subwoofer. Sensitivity is a high 89dB anechoic. Measured bass extension of 69.6Hz (-3dB).
Cons: Bass rolls off early for a speaker this size, about 70Hz at -3dB and 44Hz at -10dB, so it works best with a subwoofer or close to a wall. It needs the recommended toe-in: measured straight on, its response is less even (preference score 4.58) and the tonal balance shifts. At about $2,400 a pair it is expensive for a 6-inch two-way.
| Released | May 2021 (5 years ago) |
|---|---|
| Bass Extension (-10dB) | 43.9Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 69.6Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 14.5”H x 7.8”W x 12.6”D (368 x 197 x 320 mm) |
| Drivers | 6” AL-MAG woofer; 1” AL-MAC ceramic dome tweeter with waveguide |
| Frequency Response | 69Hz-23kHz ±2dB (manufacturer specified) |
| Impedance | Compatible with 8 ohms (manufacturer specified) |
| Sensitivity | 89dB anechoic, 92dB in-room (manufacturer specified) |
| Spinorama Preference Score | 4.89 |
| Spinorama Preference Score with Perfect Sub | 7.11 |
| Weight | 24.9 lbs (11.3 kg) each |
| Woofer Cabinet | ported |
Price history (per pair)
The price has held at $2,399.98 since Oct 2026.
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