Polish Customer Visit to T.I International Group——On-Site Evaluation of LS-28 Dual 18” Club Subwoofer
Discover the Polish customer’s on-site evaluation of the LS-28 dual 18-inch club subwoofer by T.i Audio, a leading professional audio manufacturer. Explore expert insights showcasing the subwoofer’s powerful performance and industry-grade quality.
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.
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Products
When the customer is in a hurry, and then ask for a fine over time, how do you respond to a few hundred dollars a day?
Dear Sir, Thank you very much for your order.But I'm very sorry to tell you that we can't meet your target shipment as it is really urgent (only 5 days) As you know, it's peak season now, so the production times of all factories are a bit long. That's why I ask you to confirm the order ASAP. We will try our best to get the goods ASAP (about 15 days), but we can't accept that a one-day delay will require paying US$500. I believe that nobody can accept this point either, and I'm sure I have offered you a fast delivery date. Thanks for your understanding and support.
Is Passive or Active?
Passive
What is your main market?
Our main markets are Europe, the United States, Japan, South America, and Africa. In fact, we have customers all over the world, and our products also have certificates required by various countries.
Company
What exhibition are you attending?
We attend Carton Fair, the Hong Kong Fair, overseas large-scale exhibitions, etc.
Shipping
Can you accept cash on delivery?
It's suggested that you adopt Trade Assurance. We have joined Trade Assurance Service to protect your order so as to ensure that we deliver on time and provide quality products as required. All I need to do is draft a Trade Assurance Order on Alibaba and then send the order link to you, by which you can confirm the order and make the payment via T/T, credit card, or e-checking into the account of Citibank designated by Alibaba.
In short, you only need to confirm the order and make the payment, while I will be responsible for subsequent matters such as production, delivery, customs clearance, and logistics. At the same time, if you can also contact our local agent for payment, this may make you more comfortable.
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