Thiele-Small Specifications:

408 GTi

508 GTi

Free Air Resonance (Fs):

125Hz

100Hz

Electrical Damping (Qes):

0.52

0.51

Mechanical Damping (Qms):

5.17

5.14

Total Damping (Qt):

0.47

0.4

Equivalent Volume of Compilance (Vas):

0.0388 cu. ft. (1.10 liters)

0.1059 cu. ft. (3.0 liters)

Effective Cone Area (Sd):

9.3 sq. inches (0.0060 m2)

14.26 sq. inches (0.0092 m2)

Center to Peak Linear Excursion (Xmax):

0.126 inches (3.2mm)

0.126 inches (3.2mm)

Voice Coil DC Resistance (Re):

3.4 ohms

3.4 ohms

Voice Coil Inductance (Le):

0.22mH @ 1kHz

0.22mH @ 1kHz

Voice Coil Diameter:

2 inches (51mm)

2 inches (51mm)

Voice Coil Length (Winding Length):

0.400 inches (10.2mm)

0.400 inches (10.2mm)

Air Gap Height:

0.200 inches (5.1mm)

0.200 inches (5.1mm)

BL Product:

6.2 T/M

6.2 T/M

Effective Moving Mass (Mm):

0.28 oz. (8.0 grams)

0.32 oz. (9.0 grams)

Note: The Thiele-Small specifications shown apply only after a break-in period of approximately 2 hours.

JBL continually strives to impove its products. New materials, production methods and other refinements may result in a change from published specifications and description. The changes will equal or exceed the original specifications, unless otherwise stated.

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JBL 508GTI manual

508GTI specifications

The JBL 508GTI is a remarkable addition to the world of professional audio monitors, designed to satisfy discerning listeners as well as studio professionals. With its striking design and cutting-edge technology, the 508GTI offers an impressive listening experience tailored for various audio applications, from music production to film scoring.

At the heart of the 508GTI lies a 5-inch low-frequency woofer made of a proprietary polypropylene composite, ensuring excellent bass response and clarity. This cone design minimizes distortion, allowing for clean reproduction of bass frequencies down to 45 Hz. Complementing the woofer is a 1-inch titanium dome tweeter that delivers smooth and precise high frequencies up to 40 kHz. This wide frequency response ensures that the 508GTI reproduces audio accurately, making it easier for sound engineers to mix music that translates well across different playback systems.

One of the standout features of the JBL 508GTI is its innovative Image Control Waveguide technology. This sophisticated design optimizes the speaker's dispersion pattern, allowing for a larger sweet spot while maintaining excellent stereo imaging. As a result, listeners can enjoy an immersive sound experience even when they are not seated directly in front of the monitors.

The 508GTI also incorporates advanced bi-amplification, utilizing separate amplifiers for the woofer and tweeter. With a total power output of 82 watts, this design ensures that each driver operates at its peak performance without compromise. Additionally, the built-in DSP processing allows users to tailor the speaker’s performance to their specific acoustic environment, making it highly versatile for any studio setting.

Connectivity options on the JBL 508GTI include XLR and TRS balanced inputs, providing flexibility for various professional audio sources. The speaker is also equipped with rear controls for adjusting high and low-frequency response, enabling users to optimize their listening experience based on the room's acoustics.

In summary, the JBL 508GTI combines premium materials, innovative technologies, and versatile features, making it an exceptional choice for audio professionals seeking accuracy and reliability. Its blend of performance, design, and functionality ensures that it stands out in the competitive field of nearfield monitors, delivering a listening experience that is both enjoyable and precise.