Short answer: the Genelec 8050B for better sound quality, the JBL 306P MKII for the lower price. The Genelec 8050B ranks #8 of 66 powered bookshelf speakers at $3800. The JBL 306P MKII ranks #39 at $398, $3402 cheaper.
What the Genelec 8050B offers: CEA2034 spinorama shows a very good on-axis response with excellent directivity. Predicted in-room response is smooth, with only a 2kHz dip as a real issue. Horizontal beamwidth of about ±50 degrees is very smooth and well controlled. Vertical directivity is similarly even outside the 2kHz region, as long as listening position stays within about ±20 degrees of the woofer’s border. Distortion at 96dB SPL/1m is typical low-frequency behavior with the rest of the range well controlled. Watch for: A dip around 2kHz shows up in both the on-axis and predicted in-room measurements. An unexplained distortion spike appears around 10-15kHz at 96dB SPL/1m that the reviewer couldn’t identify a clear cause for. Cumulative spectral decay (waterfall) shows a port resonance lingering in the upper-bass/lower-midrange region. Very expensive.
What the JBL 306P MKII offers: CEA2034 spinorama shows a nice, smooth on-axis response with very good directivity control for a compact 6.5” monitor. Dual 56W Class D amps keep the design affordable at $398 per pair while following JBL’s well-regarded 300-series voicing. Watch for: A narrow but noticeable dip around 1.6kHz shows up in the on-axis and listening-window curves. Distortion runs classically high for this series, reaching around 5% near 200Hz at 96dB SPL. Amplifier hiss is audible from roughly 2 feet away, and the monitor runs out of headroom at higher volumes.
Buy the Genelec 8050B if sound quality matters more than the price. Buy the JBL 306P MKII if the price matters more than sound quality.
Specifications Side By Side
| Genelec 8050B | JBL 306P MKII | |
|---|---|---|
| Price | $3800 | $398 |
| Ranked | #8 of 66 in Large Size Powered Bookshelf Speakers | #39 of 66 in Large Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 68Hz (measured, Audio Science Review) | 78Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 50Hz (measured, Audio Science Review) | 60Hz (measured, Audio Science Review) |
| Dimensions | 17.8"H x 11.3"W x 10.9"D (452.1 x 287 x 276.9 mm) | 16.1"H x 11.2"W x 12.9"D (408 x 285 x 328 mm) |
| Frequency Response | 32Hz - 25kHz (-6dB) (Manufacturer specified) | 39Hz - 24kHz (-10dB) (Manufacturer specified) |
| Inputs | XLR | - |
| Weight | 31.7 lbs / 14.4 kg each | 13.4 lbs / 6.1 kg each |
| Drivers | 8" (203mm) woofer | 6.5" woofer, 1" neodymium tweeter |
| App | No | No |
| Bluetooth | No | - |
| EQ | Yes (Room adjustment) | No |
| DSP | No | No |
| Output Power | 270w Per Speaker | 112W total |
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Prices on this page were last checked August 25, 2026 at 6:19 AM 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
Genelec 8050B: $3800 Bhphotovideo eBay
Pros: CEA2034 spinorama shows a very good on-axis response with excellent directivity. Predicted in-room response is smooth, with only a 2kHz dip as a real issue. Horizontal beamwidth of about ±50 degrees is very smooth and well controlled. Vertical directivity is similarly even outside the 2kHz region, as long as listening position stays within about ±20 degrees of the woofer’s border. Distortion at 96dB SPL/1m is typical low-frequency behavior with the rest of the range well controlled.
Cons: A dip around 2kHz shows up in both the on-axis and predicted in-room measurements. An unexplained distortion spike appears around 10-15kHz at 96dB SPL/1m that the reviewer couldn’t identify a clear cause for. Cumulative spectral decay (waterfall) shows a port resonance lingering in the upper-bass/lower-midrange region. Very expensive.
Full Genelec 8050B review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 50Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 68Hz (measured, Audio Science Review) |
| Bluetooth | No |
| DSP | No |
| Dimensions | 17.8"H x 11.3"W x 10.9"D (452.1 x 287 x 276.9 mm) |
| Drivers | 8" (203mm) woofer |
| EQ | Yes (Room adjustment) |
| Frequency Response | 32Hz - 25kHz (-6dB) (Manufacturer specified) |
| Inputs | XLR |
| Output Power | 270w Per Speaker |
| Weight | 31.7 lbs / 14.4 kg each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
JBL 306P MKII: $398 Bhphotovideo eBay
Pros: CEA2034 spinorama shows a nice, smooth on-axis response with very good directivity control for a compact 6.5” monitor. Dual 56W Class D amps keep the design affordable at $398 per pair while following JBL’s well-regarded 300-series voicing.
Cons: A narrow but noticeable dip around 1.6kHz shows up in the on-axis and listening-window curves. Distortion runs classically high for this series, reaching around 5% near 200Hz at 96dB SPL. Amplifier hiss is audible from roughly 2 feet away, and the monitor runs out of headroom at higher volumes.
Full JBL 306P MKII review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 60Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 78Hz (measured, Audio Science Review) |
| DSP | No |
| Dimensions | 16.1"H x 11.2"W x 12.9"D (408 x 285 x 328 mm) |
| Drivers | 6.5" woofer, 1" neodymium tweeter |
| EQ | No |
| Frequency Response | 39Hz - 24kHz (-10dB) (Manufacturer specified) |
| Output Power | 112W total |
| Weight | 13.4 lbs / 6.1 kg each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons