JBL 306P MKII vs Genelec 8341A

Last updated: August 18, 2026

Short answer: the JBL 306P MKII. It ranks #35 of 40 powered bookshelf speakers by sound quality at $398; the Genelec 8341A ranks #36 and costs $6590, so there is not much of a tradeoff to weigh.

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. Watch for: A narrow but noticeable dip around 1.6kHz shows up in the on-axis and listening-window curves.

What the Genelec 8341A gets right: CEA2034 spinorama shows an exceptionally flat on-axis response, within about +1.8dB/-2.2dB of the target curve, with excellent directivity control from the coaxial midrange/tweeter and dual 6.5” woofers. The catch: The bass amplifier runs out of headroom well before the mid/treble sections.

Buy the JBL 306P MKII. It ranks higher for sound quality than the Genelec 8341A and costs less, so there is no real case for the other one.

If sound quality matters at all to you, skip both of these and look higher up the 40 powered bookshelf speakers instead.

JBL 306P MKII vs Genelec 8341A

Specifications Side By Side

JBL 306P MKII Genelec 8341A
Price$398$6590
Ranked#35 of 40 in Large Size Powered Bookshelf Speakers#36 of 40 in Large Size Powered Bookshelf Speakers
Bass Extension (-3dB)78Hz (measured, Audio Science Review)58Hz (measured, Audio Science Review)
Bass Extension (-10dB)60Hz (measured, Audio Science Review)40Hz (measured, Audio Science Review)
Dimensions16.1"H x 11.2"W x 12.9"D (408 x 285 x 328 mm)not published by manufacturer
Frequency Response39Hz - 24kHz (-10dB) (Manufacturer specified)338Hz - 37kHz (-6dB) (Manufacturer specified)
Weight13.4 lbs / 6.1 kg eachnot published by manufacturer
Drivers6.5" woofer, 1" neodymium tweeter2x 6.5" woofers, 3.5" midrange, 0.75" tweeter (coaxial mid/tweeter)
AppNoNo
EQNoYes (Room adjustment)
DSPNoNo
Output Power112W total550W total (250W bass, 150W mid, 150W treble)

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The Two Speakers In Full

JBL 306P MKII: $398 Bhphotovideo

JBL 306P MKII ranking card

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.

AppNo
Bass Extension (-10dB)60Hz (measured, Audio Science Review)
Bass Extension (-3dB)78Hz (measured, Audio Science Review)
DSPNo
Dimensions16.1"H x 11.2"W x 12.9"D (408 x 285 x 328 mm)
Drivers6.5" woofer, 1" neodymium tweeter
EQNo
Frequency Response39Hz - 24kHz (-10dB) (Manufacturer specified)
Output Power112W total
Weight13.4 lbs / 6.1 kg each

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Genelec 8341A: $6590 Bhphotovideo

Genelec 8341A ranking card

Pros: CEA2034 spinorama shows an exceptionally flat on-axis response, within about +1.8dB/-2.2dB of the target curve, with excellent directivity control from the coaxial midrange/tweeter and dual 6.5” woofers. Tri-amplified design totals 550W across bass, mid, and treble sections.

Cons: The bass amplifier runs out of headroom well before the mid/treble sections, producing audible glitching/ticking distortion at higher volumes even at 1 meter - not well suited to larger rooms or higher playback levels as a result. No hard power switch, and it produces a loud static pop when AC power is cut. Very expensive at $6,590 per pair.

AppNo
Bass Extension (-10dB)40Hz (measured, Audio Science Review)
Bass Extension (-3dB)58Hz (measured, Audio Science Review)
DSPNo
Dimensionsnot published by manufacturer
Drivers2x 6.5" woofers, 3.5" midrange, 0.75" tweeter (coaxial mid/tweeter)
EQYes (Room adjustment)
Frequency Response338Hz - 37kHz (-6dB) (Manufacturer specified)
Output Power550W total (250W bass, 150W mid, 150W treble)
Weightnot published by manufacturer

As an eBay Partner, we may be compensated if you make a purchase.