Polish Customer Visit to T.I International Group——On-Site Evaluation of LS-28 Dual 18” Club Subwoofer

T.I International Group recently welcomed a professional audio customer from Poland for an on-site visit focused on product evaluation, technical testing, and purchasing discussion. The primary product under review was the LS-28 dual 18-inch club subwoofer, designed for high-output applications such as clubs, live concerts, rental systems, and large-scale events.

During the visit, the customer conducted a comprehensive assessment covering sound performance, structural quality, component selection, and manufacturing standards.

Product Evaluation – LS-28 Dual 18” Club Bass

The LS-28 is a high-performance dual 18-inch subwoofer, engineered to deliver powerful low-frequency impact, high sensitivity, and long-term reliability.

LS-28 Key Specifications Reviewed On-Site

Model: LS-28

Type: Dual 18" Club Subwoofer

Components: Italy 2 × 18" drivers, 4" voice coil

Frequency Response: 35Hz – 2.5kHz (+3dB)

Power Handling: 2000W (RMS) / 4000W (Peak)

Sensitivity: 117dB (1W @ 1m)

Max SPL:

129dB (Continuous, 1m)

135dB (Peak, 1m)

Nominal Impedance: 8Ω

Dispersion: 180° (H) × 180° (V)

Enclosure: 18mm Birch Plywood

Surface Finish: Black Polyurea Spray Paint

Input Connectors: 2 × Neutrik NL4MP

Listening Test & Performance Feedback

During the on-site testing, the Polish customer focused on low-frequency depth, punch, and dynamic response. The LS-28 demonstrated:

Strong sub-bass extension starting from 35Hz

High output without distortion at elevated SPL levels

Fast transient response, suitable for club and live music

Stable performance during long-duration tests

The customer expressed strong satisfaction with the bass impact, pressure, and clarity, noting that the LS-28 meets the demands of European club systems and professional rental applications.

Build Quality & Manufacturing Standards

Beyond sound performance, the customer carefully inspected the cabinet construction and finish quality.

Key Observations:

Solid 18mm birch plywood enclosure for structural strength

Durable polyurea coating suitable for touring and rental use

Professional internal bracing and clean wiring layout

High-quality Neutrik connectors for reliable signal connection

The manufacturing process and quality control standards reinforced confidence in the long-term durability and consistency of the LS-28.

Technical Exchange & System Integration Discussion

T.I’s engineering team engaged in detailed discussions with the customer on:

Subwoofer system matching and array configuration

Amplifier and DSP recommendations

Club and event system deployment strategies

Logistics, delivery timelines, and after-sales support

This technical exchange ensured the LS-28 would integrate smoothly into the customer’s existing PA systems.

Conclusion

The Polish customer’s visit and evaluation confirmed that the LS-28 dual 18-inch club subwoofer delivers powerful low-frequency performance, professional build quality, and reliable operation.

Following on-site testing and technical review, the customer expressed strong confidence in the LS-28 as a core subwoofer solution for their upcoming projects.

This visit once again reflects T.I International Group’s strength as a professional audio manufacturer, providing transparent production, real performance testing, and dedicated technical support for global partners.