Short answer: the JBL 708P. It ranks #21 of 48 powered bookshelf speakers by sound quality at $4000; the Genelec S360 ranks #28 and costs $4775, so there is not much of a tradeoff to weigh.
What the JBL 708P gets right: CEA2034 spinorama shows extremely good frequency response both on- and off-axis, with excellent horizontal directivity. The catch: A port resonance creates a mild rise around 600-900Hz. Vertical dispersion is narrower than horizontal, so staying within a few degrees of the tweeter axis matters.
What the Genelec S360 offers: A large format 10 inch two way monitor built for main monitoring duty in film and post production, capable of a peak SPL over 128dB while retaining Genelec’s GLM calibrated Smart Active Monitoring and Directivity Control Waveguide. Watch for: The bass alignment measures the highest Q of any speaker in this batch, 1.16, meaning it’s the most likely of the ten to show a mild bump near its port tuning frequency rather than a clean rolloff.
Buy the JBL 708P. It ranks higher for sound quality than the Genelec S360 and costs less, so there is no real case for the other one.
Specifications Side By Side
| JBL 708P | Genelec S360 | |
|---|---|---|
| Price | $4000 | $4,775 each |
| Ranked | #21 of 48 in Large Size Powered Bookshelf Speakers | #28 of 48 in Large Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 82Hz (measured, Audio Science Review) | 39.6Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 62Hz (measured, Audio Science Review) | 35.6Hz (measured, Audio Science Review) |
| Dimensions | 17.2"H x 9.8"W x 11.5"D (438 x 248 x 292 mm) | 20.9"H x 14.2"W x 14.2"D (530 x 360 x 360 mm) (20.9 x 14.2 x 14.2 in) |
| Frequency Response | 41Hz - 25kHz (+/-3dB) (Manufacturer specified) | 36Hz-22kHz -6dB |
| Weight | 25.1 lbs / 11.4 kg each | 66.1 lbs / 30 kg (66.1 lbs) each |
| Drivers | 8" woofer, 2409H 1" compression driver | 1" titanium compression tweeter, 10" cone woofer |
| App | No | - |
| EQ | No | - |
| DSP | No | - |
| Output Power | 500W total (250W woofer, 250W tweeter) | - |
| Enclosure | - | ported |
| Power Output (Watts) | - | 350W total (250W woofer, 100W tweeter, Class D) |
| Max SPL | - | Peak 128dB |
| Warranty | - | 2 years (5 with product registration) |
| Country | - | Finland |
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- JBL 4329P vs JBL 708P
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The Two Speakers In Full
JBL 708P: $4000 Bhphotovideo
Pros: CEA2034 spinorama shows extremely good frequency response both on- and off-axis, with excellent horizontal directivity. Bi-amplified 500W design (250W woofer, 250W compression driver) handles an 8” woofer and JBL’s 2409H compression tweeter.
Cons: A port resonance creates a mild rise around 600-900Hz. Vertical dispersion is narrower than horizontal, so staying within a few degrees of the tweeter axis matters. Distortion climbs at 96dB SPL, with the tweeter reaching about 2.5% THD at elevated levels.
Full JBL 708P review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 62Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 82Hz (measured, Audio Science Review) |
| DSP | No |
| Dimensions | 17.2"H x 9.8"W x 11.5"D (438 x 248 x 292 mm) |
| Drivers | 8" woofer, 2409H 1" compression driver |
| EQ | No |
| Frequency Response | 41Hz - 25kHz (+/-3dB) (Manufacturer specified) |
| Output Power | 500W total (250W woofer, 250W tweeter) |
| Weight | 25.1 lbs / 11.4 kg each |
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Genelec S360: $4,775 each Bhphotovideo
Pros: A large format 10 inch two way monitor built for main monitoring duty in film and post production, capable of a peak SPL over 128dB while retaining Genelec’s GLM calibrated Smart Active Monitoring and Directivity Control Waveguide. Listening window smoothness measures a solid 0.52 and the measured extension point reaches 39.6Hz, unusually deep for a monitor this size.
Cons: The bass alignment measures the highest Q of any speaker in this batch, 1.16, meaning it’s the most likely of the ten to show a mild bump near its port tuning frequency rather than a clean rolloff. On axis deviation measures a moderate 0.478dB average. At roughly $9,550/pair and 30kg (66 lbs) each it is one of the largest and most expensive entries in this catalog, intended for professional control rooms rather than home listening, and the model has since been updated to the S360A, so pricing and minor spec details should be confirmed with a dealer before buying.
Full Genelec S360 review and specifications →
| Bass Extension (-10dB) | 35.6Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 39.6Hz (measured, Audio Science Review) |
| Country | Finland |
| Dimensions | 20.9"H x 14.2"W x 14.2"D (530 x 360 x 360 mm) (20.9 x 14.2 x 14.2 in) |
| Drivers | 1" titanium compression tweeter, 10" cone woofer |
| Enclosure | ported |
| Frequency Response | 36Hz-22kHz -6dB |
| Max SPL | Peak 128dB |
| Power Output (Watts) | 350W total (250W woofer, 100W tweeter, Class D) |
| Warranty | 2 years (5 with product registration) |
| Weight | 66.1 lbs / 30 kg (66.1 lbs) each |
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