# Coaxial speaker Infinity Alpha 403F 100 mm (4") – car audio, full-range 2-way

**URL:** https://aio.lv/en/product--infinity-1200130019913--11512454
**Data updated:** 2026-02-15 12:44 (EET)
**Category:** Car Speakers
**Manufacturer:** Infinity
**Manufacturer code:** 1200130019913
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 24.37 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--infinity-1200130019913--11512454

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Thursday | free |
| Pickup points | 25.06.2026 | 1.99 EUR |
| Courier delivery to door | 25.06.2026 | 4.99 EUR |

## Summary description

Infinity Alpha 403F is a 100 mm (4") coaxial car speaker designed for full-range audio reproduction in vehicle interiors. This 2-way coaxial unit integrates a mid/bass driver and a tweeter to deliver balanced sound across frequencies, suitable for door or dash installation. It offers straightforward replacement or upgrade for factory speakers and improves clarity and imaging in everyday driving.

## Long description

Infinity Alpha 403F is a 100 mm (4") coaxial car speaker engineered for full-range audio reproduction in vehicle interiors. This 2-way coaxial unit combines a mid/bass driver and an integrated tweeter to provide a broad frequency response suitable for typical in-car listening. Designed for door or dash installation, the Alpha 403F is a direct-fit option for replacing or upgrading many factory speakers and aims to improve clarity and imaging during everyday driving.
Advantages
The compact 100 mm (4") size enables installation in confined mounting locations while the coaxial 2-way design keeps crossover complexity internal to the speaker. Integrated tweeter and mid/bass elements work together to reproduce both vocal and higher-frequency details from the same mounting point. Construction and material choices balance durability with acoustic performance for consistent output across typical car audio listening levels.
Suitable for
 Replacing factory door or dash speakers in compact and mid-size vehicles
 Upgrading basic car audio systems where space for larger speakers is limited
 Multi-speaker installations requiring matched 4" coaxial units for imaging consistency
Key specifications
 Driver type: 2-way coaxial (mid/bass driver with integrated tweeter)
 Nominal diameter: 100 mm (4")
 Intended mounting locations: door, dash or other compatible vehicle openings
 Application: full-range car audio reproduction for interior listening
How to use
Install the Infinity Alpha 403F in a compatible 100 mm (4") speaker opening, observing correct polarity and secure mounting to minimize vibrations. Connect the speaker to the vehicle’s head unit or amplifier using appropriate gauge speaker wire and connectors. For optimal performance, verify that the tweeter orientation and mounting depth do not interfere with trim or grille components. If replacing factory speakers, retain or adapt existing mounting brackets and wiring harnesses as needed.
Usage recommendations
Use the Alpha 403F with a properly configured head unit or low-power amplifier; avoid driving the speaker beyond recommended listening levels to prevent distortion or damage. When possible, pair front and rear speakers of similar size and type to maintain balanced stereo imaging. For improved bass response, consider adding sound deadening material to door panels and ensuring secure, airtight speaker mounting.

## FAQ

### How much does the Coaxial speaker Infinity Alpha 403F 100 mm cost, and is it available for purchase?

The price is 29.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 Thursday 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. All transactions are 100% secure and encrypted.

### 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 Infinity 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 Infinity 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/11512454/66529832_large.webp