The Polk Audio Monitor 40 Series II ranks #78 out of 122 total Medium Size Bookshelf Speakers for sound quality. See all Passive Home rankings for every top pick.
Brand: Polk
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#78 Polk Audio Monitor 40 Series II: $200 per pair Discontinued eBay
Newer model: the Polk Monitor XT20, rated 3.4/5.
Pros: A budget two-way with two 5.25” woofers and a 1” tweeter, rated at 89dB. Audio Science Review measured low on-axis deviation (0.51) and a listening window within 2.7dB from 300Hz to 5kHz. Measured bass extension of 82.0Hz (-3dB).
Cons: The predicted in-room response is not smooth (0.42) and directivity varies across frequency (3.96dB deviation), for a preference score of 3.02. Bass rolls off at 82.0Hz (-3dB). Polk’s current Monitor line equivalent is the Monitor XT20. Discontinued.
How it compares: Just above it: Monoprice Monolith THX Compact Satellite - $50 more, 8Hz lower bass extension (-3dB). Just below it: XSA Labs Vanguard - $795 more, 6Hz lower bass extension (-3dB).
| Bass Extension (-10dB) | about 51.1Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 82.0Hz (measured, Audio Science Review) |
| DIY Kit | No |
| Dimensions | 15.7”H x 7”W x 13”D (400 x 178 x 330 mm) |
| Drivers | 1” composite dome tweeter, 2x 5.25” bi-laminate woofers |
| Frequency Response | 47Hz-25kHz (manufacturer specified) |
| Impedance | 8 ohms nominal (manufacturer specified) |
| Sensitivity | 89dB (manufacturer specified) |
| Spinorama Preference Score | 3.02 |
| Spinorama Preference Score with Perfect Sub | 5.77 |
| Weight | 16.1 lbs (7.3 kg) each |
| Woofer Cabinet | ported |
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