Short answer: the Paradigm Monitor SE Atom, unless you specifically want the mod. The Pioneer SP-BS22-LR in Philharmonic AAM form is Dennis Murphy’s crossover and tweeter rework of the discontinued budget Pioneer, and its only noted flaw is some directivity error near the crossover. The Atom at $399.98 over the mod’s $168 delivers consistent directivity across all three curves, though its uneven on-axis response needs EQ.
Buy the Paradigm Monitor SE Atom. It is rated higher for sound quality, and the Pioneer SP-BS22-LR (Philharmonic AAM Mod) is discontinued, so it is only available used.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| Paradigm Monitor SE Atom | Pioneer SP-BS22-LR (Philharmonic AAM Mod) | |
|---|---|---|
| Price | $399.98 per pair | $168 per pair Discontinued |
| Ranked | #50 of 90 in Medium Size Bookshelf Speakers | #63 of 90 in Medium Size Bookshelf Speakers |
| Bass Extension (-3dB) | 58.6Hz (measured, Audio Science Review) | 78Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 49.8Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) | 60Hz (measured, Audio Science Review) |
| Drivers | 1” X-PAL aluminum dome tweeter (ferrofluid, PPA lens), 5.5” mineral-filled polypropylene mid/bass | 1x 4” curvilinear-cone woofer (stock Pioneer), 1x Peerless BC25TG15 1” silk dome tweeter (replacement) |
| Dimensions | 12.75H x 7.125W x 11D in | 12.6”H x 7.1”W x 8.5”D (320.0 x 180.0 x 215.0 mm) |
| Weight | 11.9 lbs (5.4 kg) each | 9 lbs (4.1 kg) |
| Frequency Response | 61Hz - 21kHz +/-3dB (Manufacturer specified) | - |
| Sensitivity | 85dB (2.83V/1m, measured, Audio Science Review) | 83dB (2.83V/1m, measured by Audio Science Review) |
| Impedance | 8 ohms | 8 ohms nominal (approx. 5 ohms minimum, measured by Audio Science Review) |
| Power Handling | 15-100W recommended | - |
| Woofer Cabinet | ported, rear | ported, rear |
| Spinorama Preference Score | 4.13 | 5.07 |
| Spinorama Preference Score with Perfect Sub | 6.50 | 7.82 |
| DIY Kit | No | Yes |
| Crossover Frequency | - | 3000Hz |
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Prices on this page were last checked October 2, 2026 at 10:18 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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The Two Speakers In Full
Paradigm Monitor SE Atom: $399.98 per pair Paradigm eBay
Pros: Good, consistent directivity across the on-axis, listening-window, and off-axis curves makes the Atom easier to equalize and less room-dependent than many budget speakers. Bass tuning is well judged, letting the woofer play loud on demanding tracks without bottoming out even without a subwoofer. Paradigm’s NRC research pedigree shows in the horizontal and vertical dispersion measurements. Measured bass extension of 58.6Hz (-3dB), with a measured sensitivity of 85dB.
Cons: On-axis response is uneven out of the box, with a 2-4kHz dip followed by a peak and a resonance around 15kHz that the reviewer said gives it a bright, “showroom” voicing without EQ correction. There’s no meaningful bass extension for full-range use, so a subwoofer is effectively required for anything beyond desktop or near-field listening.
Full Paradigm Monitor SE Atom review and specifications →
| Bass Extension (-10dB) | 49.8Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
|---|---|
| Bass Extension (-3dB) | 58.6Hz (measured, Audio Science Review) |
| DIY Kit | No |
| Dimensions | 12.75H x 7.125W x 11D in |
| Drivers | 1” X-PAL aluminum dome tweeter (ferrofluid, PPA lens), 5.5” mineral-filled polypropylene mid/bass |
| Frequency Response | 61Hz - 21kHz +/-3dB (Manufacturer specified) |
| Impedance | 8 ohms |
| Power Handling | 15-100W recommended |
| Sensitivity | 85dB (2.83V/1m, measured, Audio Science Review) |
| Spinorama Preference Score | 4.13 |
| Spinorama Preference Score with Perfect Sub | 6.50 |
| Weight | 11.9 lbs (5.4 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
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Pioneer SP-BS22-LR (Philharmonic AAM Mod): $168 per pair Discontinued eBay
Pros: This is Dennis Murphy’s “Affordable Accuracy Monitor” (AAM) mod of the discontinued, budget Pioneer SP-BS22-LR: the stock tweeter is swapped for a Peerless BC25TG15 dome and a redesigned 3rd-order crossover is built to match it to the stock 4” woofer. CEA2034 spinorama shows only small variations from a flat on-axis response with some directivity error near the crossover, a marked improvement over the unmodified Pioneer, which the reviewer notes shows much more variation from flat. Distortion at 86dB SPL/1m is reasonably controlled above 200Hz, and tweeter distortion barely rises even at 96dB SPL/1m. Measured bass extension of 78Hz (-3dB), with a measured sensitivity of 83dB.
Cons: Some directivity error appears near the crossover frequency. Distortion climbs in the woofer’s range (below 200Hz) at both 86dB and 96dB SPL/1m. Minimum impedance dips to about 5 ohms with a couple of resonance peaks. This is a DIY project, not a finished retail product: Murphy sold ~$168 pre-built pairs for a while but no longer does, so it now requires sourcing a used/discontinued Pioneer SP-BS22-LR pair plus building the crossover and swapping the tweeter yourself. The mod itself is public domain, but there is no current turnkey way to buy this speaker.
Full Pioneer SP-BS22-LR (Philharmonic AAM Mod) review and specifications →
| Bass Extension (-10dB) | 60Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 78Hz (measured, Audio Science Review) |
| Crossover Frequency | 3000Hz |
| DIY Kit | Yes |
| Dimensions | 12.6”H x 7.1”W x 8.5”D (320.0 x 180.0 x 215.0 mm) |
| Drivers | 1x 4” curvilinear-cone woofer (stock Pioneer), 1x Peerless BC25TG15 1” silk dome tweeter (replacement) |
| Impedance | 8 ohms nominal (approx. 5 ohms minimum, measured by Audio Science Review) |
| Sensitivity | 83dB (2.83V/1m, measured by Audio Science Review) |
| Spinorama Preference Score | 5.07 |
| Spinorama Preference Score with Perfect Sub | 7.82 |
| Weight | 9 lbs (4.1 kg) |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Pioneer SP-BS22-LR (Philharmonic AAM Mod) vs Dynaudio X14
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