JBL LSR708i 8-Inch Master Reference Monitor – Passive

JBL LSR708i 8-Inch Master Reference Monitor

The JBL LSR708i is a compact, high-output two-way reference monitor designed for professional recording, broadcast, post-production, cinema, and immersive-audio environments. It combines an 8-inch JBL 728G low-frequency driver, a 2409H high-frequency compression driver, and JBL’s Image Control Waveguide to deliver precise imaging, controlled directivity, and consistent tonal balance throughout the listening area.

With a frequency range of 35 Hz to 36 kHz and peak output up to 114 dB SPL, the LSR708i provides the clarity, dynamics, and output required for critical monitoring while maintaining a compact footprint. Its reinforced birch-plywood enclosure includes rear and bottom mounting points, making it well suited for console placement, wall mounting, surround channels, and permanent installation.

Key Features

• Two-way passive professional reference monitor

• JBL 728G 8-inch high-excursion low-frequency driver

• JBL 2409H high-frequency compression driver

• Image Control Waveguide for accurate imaging and controlled coverage

• 35 Hz–36 kHz frequency range

• Up to 114 dB maximum peak SPL

• 1.7 kHz internal dividing-network transition frequency

• Internal crossover can be bypassed for bi-amplified operation

• Reinforced birch-plywood enclosure

• Rear and bottom mounting provisions

• Designed for stereo, surround, and immersive monitoring systems

• Sold individually

Professional Monitoring Performance

JBL’s Image Control Waveguide creates a smooth transition between the low- and high-frequency drivers while maintaining consistent directivity through the crossover region. This helps produce stable stereo imaging, clear dialogue reproduction, and more uniform response across multiple listening positions.

The LSR708i is particularly well suited for:

• Recording and mixing studios

• Broadcast control rooms

• Film and television post-production

• Dolby Atmos and immersive-audio systems

• Surround and overhead monitoring

• Permanent studio and commercial installations

External Amplification Required

The JBL LSR708i is a passive monitor and does not include internal amplification. A compatible external power amplifier and appropriate JBL/HARMAN loudspeaker processing are required for proper operation.

The internal dividing network allows conventional single-wire operation, or it can be bypassed for bi-amplified system configurations.

Important: This listing includes one JBL LSR708i monitor only. Amplification, signal processing, cables, connectors, and mounting hardware are sold separately.

Specifications

What’s Included

• One JBL LSR708i Master Reference Monitor

• Manufacturer documentation

Amplifier, DSP, speaker cable, connectors, and mounting hardware are not included.