JBL 305P MKII Specifications and Review

Last updated: August 14, 2026

The JBL 305P MKII ranks #9 out of 36 total Medium Size Powered Bookshelf Speakers for sound quality. See Top Recommended Speakers By Attribute for all the top speaker suggestions.

Brand: JBL

#9 JBL 305P MKII: $319.00 Amazon

Pros: A fantastic value in studio monitors. Extremely close to the Focal Alpha 50 EVO, almost indistinguishable. Surprisingly deep and wide soundstage. Good horizontal dispersion (~70 degrees). Has a proper limiter that controls output cleanly rather than crudely cutting bass, and holds up well under sustained loud playback with minimal thermal compression.

Cons: Possible slight hissing from the amps at low levels. Rear ported, can be an issue close to walls. A port resonance around 1.6kHz is audible and distracting on some tracks. Midrange is somewhat scooped rather than flat for a studio monitor, and treble runs about 1.5dB hot - Erin’s Audio Corner recommends using the -2dB treble shelf switch. Vertical dispersion narrows around the crossover, so try to stay within about 10 degrees of the tweeter axis.

How it compares: Just above it: Focal Alpha 50 EVO - $8 cheaper, 21W less output power. Just below it: Adam Audio T5V - $170 cheaper, 11W less output power.

AppNo
Bass Extension (-10dB)43Hz (measured, Erin's Audio Corner)
Bass Extension (-3dB)50Hz (measured, Erin's Audio Corner)
BluetoothNo
Dimensions11.7"H x 7.3"W x 9.1"D (297.2 x 185.4 x 231.1 mm)
Drivers5" (127mm) woofer
EQYes (Room adjustment)
Frequency Response49 Hz - 20 kHz (+-3 dB) (Manufacturer specified)
InputsXLR, TRS
Output Power81w Per Speaker
Sensitivity91.1dB (measured at 0.3V/1m, Erin's Audio Corner)
Weight10.4 lbs / 4.7 kg each

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