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JBL 308P MkII Powered 8" Two-Way Studio Monitor (Pair)

BH #JB308PMKII2K
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JBL 308P MkII Powered 8" Two-Way Studio Monitor (Pair)
Key Features
  • Bi-Amplified Powered Reference Monitor
  • Dual 56W Class-D Amplifiers
  • Low-Frequency Woofer: 8"
  • Neodymium Woven-Composite Tweeter: 1"
Audio engineers, producers, and musicians looking for a high-quality monitoring solution will be impressed with this pair of JBL 308P MkII Powered 8" Two-Way Studio Monitors, bi-amplified reference monitors with next-generation drivers, offering high detail, precise imaging, a wide sweet spot, and remarkable dynamic range to enhance the mix capabilities of any modern workspace. The magnetically shielded 308P MkII features dual 56W Class-D amplifiers, which power the 8" low-frequency woofer and woven-composite 1" neodymium tweeter. The combined output of the woofer and tweeter offer a frequency response of 45 Hz to 20 kHz with a peak SPL of 112 dB.
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JBL 308P MKII Overview

Audio engineers, producers, and musicians looking for a high-quality monitoring solution will be impressed with this pair of JBL 308P MkII Powered 8" Two-Way Studio Monitors, bi-amplified reference monitors with next-generation drivers, offering high detail, precise imaging, a wide sweet spot, and remarkable dynamic range to enhance the mix capabilities of any modern workspace. The magnetically shielded 308P MkII features dual 56W Class-D amplifiers, which power the 8" low-frequency woofer and woven-composite 1" neodymium tweeter. The combined output of the woofer and tweeter offer a frequency response of 45 Hz to 20 kHz with a peak SPL of 112 dB.

The monitor features JBL's Image Control Waveguide technology for accurate audio reproduction and JBL's Slip Stream port design for improved bass response. The 308P MkII is equipped with a boundary EQ for controlling the low-frequency response when placed near a wall, and has a 3-position HF trim switch. To ensure flexible connectivity, JBL included balanced XLR and 1/4" TRS inputs, both of which feature detented level controls. Other features include a selectable input sensitivity switch that ensures compatibility with a range of signal sources. The JBL 308P MkII ships with a power cord.

  • Patented Image Control Waveguide for detailed imaging and a broad, room-friendly sweet spot
  • High-quality JBL transducers for optimized transient response and improved linearity
  • Patented Slip Stream low-frequency port for superior bass performance at all playback levels
  • Dual integrated, custom Class-D amplifiers provide 112W of power for high output and dynamic range
  • Boundary EQ settings compensate for low-frequency variants introduced by the environment
  • HF Trim switch adjusts high-frequency output to room acoustics or personal preferences
  • Flexible connectivity with balanced XLR and 1/4" TRS inputs, +4 dBu / -10 dBV input-sensitivity switch and adjustable volume control
  • Engineered to JBL Linear Spatial Reference design criteria for outstanding accuracy in any working space
  • Strenuous JBL 100-hour full-power test ensures years of reliability
  • Sleek, modern design provides a visual upgrade to any studio
UPC: 691991007729

JBL 308P MKII Specs

Key Specs
Monitor Type & Configuration
Active 2-Way
Total Power Output
112 W
Tweeter
1x 1" / 25.4 mm Dome
Woofer
1x 8" / 20.3 cm Cone
Frequency Range
37 Hz to 24 kHz (-10 dB)
Audio I/O
1x XLR 3-Pin Balanced Line Input
1x 1/4" TRS Balanced Line Input
Digital Audio I/O
No
Network I/O
No
Wireless
No
Monitor Type & Configuration
Active 2-Way
Number of Included Monitors
Single Monitor
Enclosure
Bass-Reflex/Ported, Shielded
Total Power Output
112 W
Drivers per Monitor
Tweeter
1x 1" / 25.4 mm Dome
Woofer
1x 8" / 20.3 cm Cone
Amplifiers
HF: 56 W Class-D
LF: 56 W Class-D
Performance
Frequency Range
37 Hz to 24 kHz (-10 dB)
Frequency Response
45 Hz to 20 kHz ± 3 dB
Maximum Sound Pressure Level (SPL)
112 dB
Signal-to-Noise Ratio
75 dBA
Total Harmonic Distortion (THD)
<10%
Maximum Input Level
+20.3 dBu (Balanced)
+6 dBV (Unbalanced)
Protections and Limiting
Peak Limiter
Signal Processing
EQ
HF Shelf
LF Shelf
Crossover Frequency
1800 Hz, 24 dB/Octave Slope
Connectivity
Audio I/O
1x XLR 3-Pin Balanced Line Input
1x 1/4" TRS Balanced Line Input
Digital Audio I/O
No
Network I/O
No
USB
No
Wireless
No
Mobile App Compatible
No
Power
AC Input Power
100 to 240 VAC, 50/60 Hz
Physical
Color
Black
Monitor Orientation
Vertical
Enclosure Material
ABS, MDF
Mounting Points
No
Dimensions (W x H x D)
10 x 16.5 x 12.1" / 254 x 419.1 x 307.3 mm
Weight
17.9 lb / 8.1 kg
Packaging Info
Package Weight
21.68 lb
Box Dimensions (LxWxH)
19 x 13 x 13"

JBL 308P MKII Reviews

Great sound & sleek look

By DJCJ
Rated 4 out of 5
Date: 2026-04-01

I bought these approximately a month ago to upgrade the sound in my home studio. I've been a fan of JBL since the 90's. They are my first choice in audio, and these speakers don't disappoint.

Great Quality / Sound

By Maako
Rated 5 out of 5
Date: 2024-02-12

I am enjoying these monitors in my home studio. Originally purchased without the subwoofer (LSR310S), but added that and now is feels complete. Very happy with the quality and sound for my application. Crispy highs and great bass frequency response (more so with the addition of the LSR310S).

See any errors on this page?

Can the amplifier be bypassed to use as passive ...

Can the amplifier be bypassed to use as passive speakers?
Asked by: Anonymous
This is an active speaker, with the amplifiers built in, so it would not be used as a passive speaker. JBL LSR708i 8" Master Reference Monitor (Single), BH #JBLSR708I would be a very god quality passive reference monitor to consider.
Answered by: Steven M
Date published: 2020-11-18

Can you add a subwoofer?

Can you add a subwoofer?
Asked by: Steven
Yes, a subwoofer such as the JBL LSR310S 200W Powered 10" Subwoofer(BH #JBLSR310S) is a great pairing for the JBL 308P MkII Powered 8" Two-Way Studio Monitors. You would feed the subwoofer from your main output signal, then feed the monitors from the subwoofer outputs. Link to LSR310S here: https://bhpho.to/3DCLlTY
Answered by: Matt Z
Date published: 2022-04-05

can i use only one speaker to connect to a laptop ...

can i use only one speaker to connect to a laptop computer?
Asked by: Gilbert
Yes, you can use a single speaker with a laptop computer.
Answered by: Lisa S
Date published: 2022-01-06

Good to use with AV receivers as Front right/left ...

Good to use with AV receivers as Front right/left bookshelf speakers?
Asked by: Nagendra
These JBL studio monitors would sound great as front surround speakers, but they must come out of the pre amp, and given an audio only signal, because they have their own built-in power.
Answered by: Steven M
Date published: 2022-01-06

Is this pair (Left & right)?

Is this pair (Left & right)?
Asked by: Michael
No it is not a pair, it is a single unit.
Answered by: Joaquin
Date published: 2020-01-22
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