Short answer: the Genelec 8030C for the higher ranking, the JBL 305P MKII for the lower price. The Genelec 8030C ranks #2 of 24 powered bookshelf speakers at $1590. The JBL 305P MKII ranks #7 at $299, $1291 cheaper.
On the Genelec 8030C side: CEA2034 spinorama shows a near-flat on-axis response with smooth directivity - “very nice overall.” Predicted in-room response is excellent. The catch: A minor but measurable dip between 2-3kHz shows up in both on- and off-axis measurements.
The case for the JBL 305P MKII: A fantastic value in studio monitors. Set against that: Possible slight hissing from the amps at low levels.
Buy the Genelec 8030C if the ranking matters more than the price. Buy the JBL 305P MKII if the price matters more than the ranking.
Specifications Side By Side
| Genelec 8030C | JBL 305P MKII | |
|---|---|---|
| Price | $1590 | $299.00 |
| Ranked | #2 of 24 in Medium Size Powered Bookshelf Speakers | #7 of 24 in Medium Size Powered Bookshelf Speakers |
| Bass Extension (-10dB) | 47Hz | - |
| Bass Extension (-3dB) | 59Hz | - |
| Dimensions | 11.7"H x 7.4"W x 7"D (297.2 x 188 x 177.8 mm) | 11.7"H x 7.3"W x 9.1"D (297.2 x 185.4 x 231.1 mm) |
| Inputs | XLR | XLR, TRS |
| Weight | 11 lbs / 5 kg each | 10.4 lbs / 4.7 kg each |
| Drivers | 5.1" woofer, 0.75" metal dome tweeter | 5" (127mm) woofer |
| App | No | No |
| Bluetooth | No | No |
| EQ | Yes (Bass tilt, treble tilt, room response) | Yes (Room adjustment) |
| Frequency Response | 54Hz - 20kHz (±2.5dB) (Manufacturer specified) | 49 Hz - 20 kHz (+-3 dB) (Manufacturer specified) |
| Max SPL | 110dB @ 1m | - |
| Output Power | 100W (50W woofer + 50W tweeter) | 81w Per Speaker |
The Two Speakers In Full
Genelec 8030C: $1590 Bhphotovideo
Pros: CEA2034 spinorama shows a near-flat on-axis response with smooth directivity - “very nice overall.” Predicted in-room response is excellent aside from one minor dip. Reasonably wide horizontal beamwidth of about ±60 degrees that doesn’t narrow even above 10kHz. At 106dB SPL/1m, bass distortion measures much lower than a comparable passive speaker-plus-amplifier combination (Revel M106) tested the same way. Compression is purely instantaneous/amplitude-related rather than thermal, with max SPL before compression reaching 111dB SPL at 200Hz (96dB plus 15dB of headroom). The reviewer found it immediately musical, with reference tracks “translating” beautifully out of the box, and EQ correction of its one measured flaw improved detail with no downsides. Overall conclusion: excellent value, a rare combination of measured accuracy and genuinely engaging sound.
Cons: A minor but measurable dip between 2-3kHz shows up in both on- and off-axis measurements. Vertical directivity varies significantly with frequency, so listening height needs to stay right at the tweeter/ear axis for accurate tonal balance. Distortion at 106dB SPL/1m is elevated in the 500Hz-2kHz range compared to the Revel M106 comparison, even though bass distortion is much better. Compression headroom drops substantially at low frequencies - only about 105dB SPL max at 50Hz (a 0.5dB compression point) versus 111dB SPL at 200Hz, roughly a 6dB difference. As a near-field monitor, it has genuinely limited headroom in the deep bass - the reviewer noted severe distortion on deep-bass-heavy tracks at anything beyond modest listening levels.
| App | No |
|---|---|
| Bass Extension (-10dB) | 47Hz |
| Bass Extension (-3dB) | 59Hz |
| Bluetooth | No |
| Dimensions | 11.7"H x 7.4"W x 7"D (297.2 x 188 x 177.8 mm) |
| Drivers | 5.1" woofer, 0.75" metal dome tweeter |
| EQ | Yes (Bass tilt, treble tilt, room response) |
| Frequency Response | 54Hz - 20kHz (±2.5dB) (Manufacturer specified) |
| Inputs | XLR |
| Max SPL | 110dB @ 1m |
| Output Power | 100W (50W woofer + 50W tweeter) |
| Weight | 11 lbs / 5 kg each |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Links
JBL 305P MKII: $299.00 Amazon
Pros: A fantastic value in studio monitors. Extremely close to the Focal Alpha 50 EVO, almost indistinguishable.
Cons: Possible slight hissing from the amps at low levels. Rear ported, can be an issue close to walls.
| App | No |
|---|---|
| Bluetooth | No |
| Dimensions | 11.7"H x 7.3"W x 9.1"D (297.2 x 185.4 x 231.1 mm) |
| Drivers | 5" (127mm) woofer |
| EQ | Yes (Room adjustment) |
| Frequency Response | 49 Hz - 20 kHz (+-3 dB) (Manufacturer specified) |
| Inputs | XLR, TRS |
| Output Power | 81w Per Speaker |
| Weight | 10.4 lbs / 4.7 kg each |
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner Review Measurements
- Audio Science Review Measurements
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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.