JBL LSR305P MK3 Active Studio Monitor

JBL LSR305P MKIII — 5-Inch Powered Studio Monitor for Honest Mixing

The JBL LSR305P MKIII is a 5-inch bi-amplified powered studio monitor built to bring JBL's professional monitoring lineage into compact project studios and editing suites. This third-generation 3 Series model pairs a newly engineered silk-dome tweeter with a long-throw 5-inch woofer for accurate high-mid detail and tightly controlled bass. With 86 watts of bi-amplified Class D power and 109 dB peak SPL, the cabinet gives engineers the headroom to push a mix hard and still hear what is happening at the edges.

What Sets This Monitor Apart

Two patented JBL acoustic technologies anchor this model. The Image Control Waveguide shapes the high-frequency dispersion into a 120° × 90° coverage pattern, producing precise imaging and a room-friendly sweet spot that stays consistent off-axis. The double-flared Slipstream™ port reduces turbulence at the cabinet exit, so bass remains clean and articulate even when the monitor is pushed near its limits. Onboard DSP adds four room-tuning controls with 81 customized presets, letting users compensate for desktop, stand-mount, or wall-adjacent placement without external processing.

Driver Configuration and Power — Headroom for Critical Decisions

The bi-amplified architecture dedicates a separate Class D amplifier to each driver, eliminating the crossover distortion that plagues single-amp designs.

• LF Driver: 127 mm (5") long-throw woofer — delivers controlled low end down to 45 Hz
• HF Driver: 25 mm (1") silk dome — extends smoothly to 38 kHz for accurate high-mid detail
• Amplification: 86 W total Class D (43 W LF + 43 W HF) — bi-amped design with ultra-low self-noise

Frequency Response and SPL — Translation Across the Spectrum

Frequency range and maximum SPL determine whether a monitor can reproduce both the sub energy of a kick drum and the air of a cymbal without strain.

• Frequency Range: 45 Hz – 38 kHz (-10 dB) — full-bandwidth coverage for music, film, and broadcast work
• Maximum Peak SPL: 109 dB — enough headroom to push the mix and reveal limiter behavior
• Crossover: 2160 Hz — clean handoff between woofer and tweeter for coherent imaging

Room Tuning and Connectivity — Built for Real Studios

Few project monitors address placement the way this one does. Four onboard DSP controls provide 81 preset combinations that compensate for boundary effects and tailor the high-frequency response.

• DSP Room Tuning: 4 onboard controls / 81 presets — compensates for desktop, stand, or wall placement
• Inputs: Balanced XLR / 6.3 mm TRS combo — accepts +4 dBu pro and -10 dBV consumer levels
• Coverage Pattern: 120° × 90° — wide, room-friendly sweet spot for collaborative listening

Who This Monitor Is For

The JBL LSR305P MKIII is the right choice for project-studio engineers, bedroom producers, podcasters, and content creators who need a compact nearfield monitor with the honesty and headroom of a larger professional system. Onboard DSP room tuning makes it especially well suited to untreated rooms where boundary reflections muddy the low end. Pairing it with the matching LSR310S subwoofer extends the system for film post, electronic music, and full-range mixing work.