Short answer: the JBL L52 Classic for better sound quality, the Definitive Technology ProMonitor 1000 for the lower price. The JBL L52 Classic ranks #41 of 63 bookshelf speakers at $1099.95. The Definitive Technology ProMonitor 1000 ranks #55 at $249, $850.95 cheaper.
The case for the JBL L52 Classic: 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. 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; adding a subwoofer high-pass didn’t fix the high-frequency distortion either.
On the Definitive Technology ProMonitor 1000 side: Bass distortion is well controlled per the measurements, and the slow bass rolloff means it can be pushed fairly hard for its size. Set against that: CEA2034 spinorama shows severely reduced bass energy between 40-120Hz, a directivity mismatch between the tweeter and woofer, and a severe resonance/interference issue around 14kHz.
Buy the JBL L52 Classic if sound quality matters more than the price. Buy the Definitive Technology ProMonitor 1000 if the price matters more than sound quality.
If sound quality matters at all to you, skip the Definitive Technology ProMonitor 1000. It ranks near the bottom of the 63 bookshelf speakers, so look higher up the list instead.
Specifications Side By Side
| JBL L52 Classic | Definitive Technology ProMonitor 1000 | |
|---|---|---|
| Price | $1,099.95 | $249.00 |
| Ranked | #41 of 63 in Medium Size Bookshelf Speakers | #55 of 63 in Medium Size Bookshelf Speakers |
| Drivers | 5.25" pure pulp cone woofer, 0.75" titanium dome tweeter with waveguide | 1" aluminum dome tweeter, 5.25" BDSS mid/woofer, 5.25" planar bass radiator |
| Dimensions | 13-1/16"H x 7-13/16"W x 8-11/16"D | 10.88H x 6.25W x 6.5D in |
| Weight | 11 lbs each | 7.3 lbs / 3.29 kg each |
| Impedance | 4 ohms nominal, 3.7 ohms minimum (measured, Erin’s Audio Corner) | 8 ohms nominal |
| Sensitivity | 85dB (measured average, Erin’s Audio Corner) | 86dB (2.83V/1m, measured, Audio Science Review - reviewer noted this vs. a manufacturer spec of 91dB) |
| Frequency Response | 47Hz - 24kHz (-6dB, manufacturer specified) | 47Hz - 30kHz (Manufacturer specified) |
| Power Handling | 10-75W RMS | - |
| Bass Extension (-3dB) | 62Hz (measured average, Erin’s Audio Corner) | 95Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 45Hz (measured average, Erin’s Audio Corner) | 80Hz (measured, Audio Science Review) |
| Crossover Frequency | 2.8kHz | - |
| Woofer Cabinet | - | passive radiator |
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The Two Speakers In Full
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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Definitive Technology ProMonitor 1000: $249.00 Amazon
Pros: Bass distortion is well controlled per the measurements, and the slow bass rolloff means it can be pushed fairly hard for its size. Ships with a footer that keeps the small cabinet planted despite its light weight.
Cons: CEA2034 spinorama shows severely reduced bass energy between 40-120Hz, a directivity mismatch between the tweeter and woofer, and a severe resonance/interference issue around 14kHz. Distortion at 96dB SPL was so bad the reviewer limited testing to 86dB. Direct comparison to a $118/pair Pioneer SP-BS22-LR left the reviewer calling the $500/pair ProMonitor 1000 “a bad experiment that should be forgotten” and concluding “there is nothing Pro about it.”
Full Definitive Technology ProMonitor 1000 review and specifications →
| Bass Extension (-10dB) | 80Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 95Hz (measured, Audio Science Review) |
| Dimensions | 10.88H x 6.25W x 6.5D in |
| Drivers | 1" aluminum dome tweeter, 5.25" BDSS mid/woofer, 5.25" planar bass radiator |
| Frequency Response | 47Hz - 30kHz (Manufacturer specified) |
| Impedance | 8 ohms nominal |
| Sensitivity | 86dB (2.83V/1m, measured, Audio Science Review - reviewer noted this vs. a manufacturer spec of 91dB) |
| Weight | 7.3 lbs / 3.29 kg each |
| Woofer Cabinet | passive radiator |
As an eBay Partner, we may be compensated if you make a purchase.
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