---
product_id: 617502769
title: "Infinity REF307F Reference Series 3.5\" Extreme-Performance Automotive coaxial Speakers"
brand: "infinity"
price: "€ 190.17"
currency: EUR
in_stock: true
category: "Infinity"
url: https://www.desertcart.pt/products/617502769-infinity-ref307f-reference-series-3-5-extreme-performance-automotive-coaxial
store_origin: PT
region: Portugal
---

# 21 kHz frequency response 50W max output power Plus One™ oversized woofer cone Infinity REF307F Reference Series 3.5" Extreme-Performance Automotive coaxial Speakers

**Brand:** infinity
**Price:** € 190.17
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your drive with sound that’s as bold as your lifestyle.

## Quick Answers

- **What is this?** Infinity REF307F Reference Series 3.5" Extreme-Performance Automotive coaxial Speakers by infinity
- **How much does it cost?** € 190.17 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/617502769-infinity-ref307f-reference-series-3-5-extreme-performance-automotive-coaxial)

## Best For

- infinity enthusiasts

## Why This Product

- Trusted infinity brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted Performance:** Backed by Infinity’s legacy and a 4.6-star rating from discerning audiophiles.
- • **Audiophile-Grade Clarity:** Edge-driven textile tweeters deliver smooth, non-fatiguing highs even at max volume.
- • **Customizable Sound Profile:** Adjustable tweeter output lets you tailor high frequencies to your ride or mood.
- • **Seamless Fit, Sleek Design:** Compact, flush-mount baskets engineered to fit nearly any vehicle effortlessly.
- • **Bass That Commands Attention:** Patented Plus One™ cones provide more cone area for deeper, punchier bass.

## Overview

The Infinity REF307F Reference Series 3.5" coaxial speakers combine audiophile-grade tweeters with patented Plus One™ oversized woofers to deliver crisp highs and powerful bass. Designed for easy flush-mount installation in most vehicles, these 50W speakers offer adjustable tweeter output for personalized sound optimization, making them the perfect upgrade for car audio enthusiasts seeking premium performance and clarity.

## Description

New Reference speakers are designed to deliver Infinity’s signature sound in more vehicles. They feature edge-driven textile tweeters for smooth, clear highs and the larger models offer an adjustable tweeter output level control for high-frequency optimization based on installation location or the listener's preference. Oversized Plus One™ woofers offer more surface area for higher bass output and enhanced midrange performance. Plus our newly engineered baskets are optimized to fit most factory speaker locations. Available in a range of standard sizes - 3-1/2", 4", 5-1/4", 6-1/2", 6" x 8" and 4" x 6" coaxial, 6" x 9" 3-way, and 5-1/4", 6-1/2", and 6" x 9" component - they’re the perfect upgrade from factory speakers.

## Features

- The audiophile-grade tweeters used in Infinity's new Reference speakers deliver smooth, non-fatiguing sound even at high output levels.
- The larger Reference multielement and component systems offer a tweeter output level control to optimize system linearity to suit installation location or the listener's preference.
- Harman’s patented (US patent #7,548,631) Plus One cones provide more overall speaker-cone area than other cones in its class - the result is higher sensitivity, increased low-frequency output and accurate music reproduction.
- Reference speakers are available in a range of standard sizes, and feature a compact design that allows them to fit just about any vehicle on the road today.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CV4HFR9Z |
| Additional Features | Lightweight |
| Age Range Description | Adult |
| Antenna Location | For Surround Sound Systems |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Stereo |
| Best Sellers Rank | #75,089 in Electronics ( See Top 100 in Electronics ) #247 in Coaxial Car Speakers |
| Brand | Infinity |
| Built-In Media | REF307F |
| Color | black |
| Compatible Devices | Desktop, Laptop, MP3 Player, Projector, Smartphone, Tablet, Television |
| Compatible with Vehicle Type | Car |
| Connectivity Protocol | Coaxial |
| Connectivity Technology | Coaxial |
| Control Method | Touch |
| Controller Type | Touch Control |
| Customer Package Type | FFP |
| Customer Reviews | 4.6 4.6 out of 5 stars (95) |
| Enclosure Material | Plastic |
| Frequency Response | 21 KHz |
| Is Waterproof | False |
| Item Dimensions D x W x H | 21.5D x 7.5W x 13.6H centimeters |
| Item Weight | 1.8 Pounds |
| MP3 player | No |
| Manufacturer | Infinity |
| Model Name | REF307F |
| Model Number | REF307F |
| Mounting Type | Flush Mount |
| Number of Audio Channels | 2.0 |
| Number of Items | 1 |
| Power Source | Corded Electric |
| Speaker Maximum Output Power | 50 Watts |
| Speaker Size | 3.5 Inches |
| Speaker Type | Coaxial |
| Specific Uses For Product | Car audio systems and home surround sound systems |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Diameter | 3.5 Inches |
| Tweeter Diameter | 3.5 Inches |
| UPC | 050667379957 |
| Unit Count | 1 Count |
| Warranty Type | Limited |
| Wireless Technology | No Wireless Communication Technology |
| Woofer Diameter | 3.5 Inches |

## Product Details

- **Audio output mode:** Stereo
- **Brand:** Infinity
- **Connectivity technology:** Coaxial
- **Frequency response:** 21 KHz
- **Speaker maximum output power:** 50 Watts

## Images

![Infinity REF307F Reference Series 3.5" Extreme-Performance Automotive coaxial Speakers - Image 1](https://m.media-amazon.com/images/I/61lfOOqLRVL.jpg)

## Available Options

This product comes in different **Style** options.

## Frequently Bought Together

- Infinity REF307F Reference Series 3.5" Extreme-Performance Automotive coaxial Speakers
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**Shop now:** [https://www.desertcart.pt/products/617502769-infinity-ref307f-reference-series-3-5-extreme-performance-automotive-coaxial](https://www.desertcart.pt/products/617502769-infinity-ref307f-reference-series-3-5-extreme-performance-automotive-coaxial)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-09-05*