Short answer: the Pioneer SP-BS22-LR (Philharmonic AAM Mod). It ranks #33 of 56 bookshelf speakers by sound quality at $168; the JBL L52 Classic ranks #34 and costs $1099.95, so there is not much of a tradeoff to weigh.
The case for the Pioneer SP-BS22-LR (Philharmonic AAM Mod): This is Dennis Murphy’s “Affordable Accuracy Monitor” (AAM) mod of the discontinued. The tradeoff: Some directivity error appears near the crossover frequency.
What the JBL L52 Classic gets right: Genuine walnut wood veneer cabinet with a retro Quadrex foam grille (black, orange, or dark blue) reviving JBL’s classic L-series look. The catch: Measured compression and distortion behavior from about 1-5 kHz was inconsistent (“wonky”) across output levels, and didn’t clean up even at lower volume.
Buy the Pioneer SP-BS22-LR (Philharmonic AAM Mod). It ranks higher for sound quality than the JBL L52 Classic and costs less, so there is no real case for the other one.
Specifications Side By Side
| Pioneer SP-BS22-LR (Philharmonic AAM Mod) | JBL L52 Classic | |
|---|---|---|
| Price | $168 | $1,099.95 |
| Ranked | #33 of 56 in Medium Size Bookshelf Speakers | #34 of 56 in Medium Size Bookshelf Speakers |
| Bass Extension (-3dB) | 78Hz (measured, Audio Science Review) | 62Hz (measured average, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 60Hz (measured, Audio Science Review) | 45Hz (measured average, Erin’s Audio Corner) |
| Drivers | 1x 4" curvilinear-cone woofer (stock Pioneer), 1x Peerless BC25TG15 1" silk dome tweeter (replacement) | 5.25" pure pulp cone woofer, 0.75" titanium dome tweeter with waveguide |
| Weight | 9 lbs / 4.1 kg | 11 lbs each |
| Sensitivity | 83dB (2.83V/1m, measured by Audio Science Review) | 85dB (measured average, Erin’s Audio Corner) |
| Impedance | 8 ohms nominal (approx. 5 ohms minimum, measured by Audio Science Review) | 4 ohms nominal, 3.7 ohms minimum (measured, Erin’s Audio Corner) |
| Crossover Frequency | 3000Hz | 2.8kHz |
| Dimensions | 12.6"H x 7.1"W x 8.5"D (320.0 x 180.0 x 215.0 mm) | 13-1/16"H x 7-13/16"W x 8-11/16"D |
| Woofer Cabinet | ported, rear | - |
| Frequency Response | - | 47Hz - 24kHz (-6dB, manufacturer specified) |
| Power Handling | - | 10-75W RMS |
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The Two Speakers In Full
Pioneer SP-BS22-LR (Philharmonic AAM Mod): $168
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.
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 |
| 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) |
| Weight | 9 lbs / 4.1 kg |
| Woofer Cabinet | ported, rear |
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JBL L52 Classic: $1,099.95 Amazon
Pros: Genuine walnut wood veneer cabinet with a retro Quadrex foam grille (black, orange, or dark blue) reviving JBL’s classic L-series look. 5.25” pure pulp cone woofer and 0.75” titanium dome tweeter on a waveguide, front-firing bass reflex port, in a compact stand-mount cabinet. A pronounced upper-bass bump around 100 Hz gives kick drums a punchy, textured character.
Cons: Measured compression and distortion behavior from about 1-5 kHz was inconsistent (“wonky”) across output levels, and didn’t clean up even at lower volume; adding a subwoofer high-pass didn’t fix the high-frequency distortion either. Response rolls off quickly above the upper-bass bump, so there’s punch and impact but not real low-end rumble or fundamental weight below about 60 Hz without a subwoofer. Soundstage width was inconsistent track to track, with imaging not staying locked to where instruments should be. Vocals could sound hot and slightly grainy in the 2.5-5 kHz region; pointing the speakers off-axis reduced that sharpness but also killed high-frequency air.
Full JBL L52 Classic review and specifications →
| Bass Extension (-10dB) | 45Hz (measured average, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 62Hz (measured average, Erin's Audio Corner) |
| Crossover Frequency | 2.8kHz |
| Dimensions | 13-1/16"H x 7-13/16"W x 8-11/16"D |
| Drivers | 5.25" pure pulp cone woofer, 0.75" titanium dome tweeter with waveguide |
| Frequency Response | 47Hz - 24kHz (-6dB, manufacturer specified) |
| Impedance | 4 ohms nominal, 3.7 ohms minimum (measured, Erin's Audio Corner) |
| Power Handling | 10-75W RMS |
| Sensitivity | 85dB (measured average, Erin's Audio Corner) |
| Weight | 11 lbs each |
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