# Active Tube Subwoofer Kruger & Matz model LEC-KMI300X, 500W power

**URL:** https://aio.lv/en/product--kruger-matz-lec-kmi300x--12056055
**Data updated:** 2026-03-12 19:39 (EET)
**Category:** Car Speakers
**Manufacturer:** kruger & matz
**Manufacturer code:** LEC-KMI300X
**EAN:** 5901436780632
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 152.99 €
**Prices and availability valid until:** 2026-08-02 23:59
**Price without VAT (21%):** 126.44 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kruger-matz-lec-kmi300x--12056055

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

Active tube subwoofer Kruger & Matz LEC-KMI300X with 500W power. Designed to reproduce low-frequency audio, this subwoofer suits car audio systems and mobile sound setups requiring deep bass reinforcement. Features an active (powered) design in a tube enclosure that optimizes low-end output and can be integrated with existing amplifiers and head units for improved bass response.

## Long description

Active tube subwoofer Kruger & Matz LEC-KMI300X, 500W power is a powered low-frequency driver in a cylindrical enclosure designed to reproduce deep bass for car audio systems and mobile sound setups. The active design integrates an internal amplifier so the subwoofer can be connected directly to a head unit or to an existing audio system, providing enhanced low-end response without requiring a separate external amplifier. Its tube enclosure balances enclosure volume and output to emphasize low-frequency extension while remaining compact for easier installation in vehicles or portable rigs.
Advantages
The powered configuration simplifies installation because the internal amplifier is matched to the driver and enclosure, reducing the need for external amplification or complex crossover setup. The tube housing offers efficient acoustic coupling and supports strong low-frequency output relative to its size. Built for vehicle and mobile applications, the design focuses on low-frequency clarity and controlled bass that integrates with midrange and high frequencies from existing speakers.
Suitable for
Car audio systems requiring deeper bass reinforcement
Mobile sound setups and portable installations
Users who prefer a compact, enclosed subwoofer solution
Integrating with factory or aftermarket head units
Key specifications
Power output: 500 W (RMS/peak values depend on manufacturer specification)
Enclosure type: tube / cylindrical active enclosure
Amplification: internal powered amplifier (integrated)
Application: automotive and mobile audio use
Connection types: line-level and speaker-level inputs for integration with head units (check unit for specific connectors)
Installation: compact form factor for trunk, cargo area or under-seat placement
How to use
Place the subwoofer in a stable position inside the vehicle or mobile setup where the tube enclosure has enough clearance. Connect the unit to the audio source using the appropriate input (line-level RCA or speaker-level input) and follow the amplifier gain and crossover controls to blend the low-frequency output with the rest of the audio system. Ensure secure mounting and proper wiring, observing vehicle electrical limits and grounding practices. Adjust volume and crossover frequency to achieve balanced bass without distortion.
Usage recommendations
For best results, set the crossover point so the subwoofer covers frequencies below the main speakers' low-frequency capability, typically between 60–120 Hz depending on speaker characteristics. Start with moderate gain and increase gradually to avoid clipping; check connections and vehicle alternator capacity when using the subwoofer at high levels.

## FAQ

### How much does the Active Tube Subwoofer Kruger & Matz LEC-KMI300X cost, and is it available for purchase?

The price is 152.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 100 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 23.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Active Tube Subwoofer Kruger & Matz LEC-KMI300X be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All kruger & matz products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized kruger & matz service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12056055/67542068_large.webp