£78.23

Infinity Alpha 603C 165mm 2-Way Speaker System, Plus One Cone, Edge-Driven Silk Dome Tweeter, 90W RMS, with Grid, High Fidelity Sound for Premium Upgrade.

Name: Infinity Alpha 603C 165mm 2-Way Speaker System, Plus One Cone, Edge-Driven Silk Dome Tweeter, 90W RMS, with Grid, High Fidelity Sound for Premium Upgrade.
Brand: Infinity
Price: 78.23 GBP
Availability: InStock

Black, INFSPKAL603C

Built-In Speakers

It has never been this cheap. We have no record of a lower price.

£78 today · cheaper than every other day in the last 3 months

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Price History & Forecast

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Last 43 days · 43 data points (no recent data)

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Price distribution over 43 days • 3 price levels

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Most common price: £83 (17 days, 39.5%)

Price range: £78 - £83

Price levels: 3 different prices over 43 days

Description

Elevate your sound experience with the Infinity Alpha 603C Component Speaker System. Designed to deliver Infinity legendary acoustic performance at an affordable price, this 165mm (6-1/2") kit is the perfect solution for music enthusiasts looking for a superior upgrade to their original audio system. Each system is meticulously tuned by engineers to ensure a consistent and faithful sound signature. The Alpha 603C stands out for the use of a silk dome tweeter with an Edge-driven design. Unlike conventional tweeters, this technology delivers a broader and much smoother high-frequency response, ensuring never aggressive sound at any volume level. The woofer boasts the patented Plus One architecture, which increases the overall surface area of the cone to produce deeper bass, increased sensitivity and a more assertive musical character. Technical specifications: Model: Infinity Alpha 603C Type: 165mm 2-Way Component Speaker System with Grid Power Handling: 90W RMS, 720W Peak Sensitivity (at 2.83V): 90dB Frequency Response: 60Hz - 20kHz Nominal Impedance: 4 ohms Box contents include 2 woofers, 2 protective grilles, 2 x 19 mm (0.75") tweeters, flush mount adapters, lock nuts, 2 filter housings (crossover) and necessary mounting accessories.

Key Features

Plus One Cone Architecture: Patented Plus One cones provide a superior membrane surface than other speakers of the same size. This design increases sensitivity and produces richer low frequencies with an assertive musical character.

Edge-driven Silk Dome Tweeters: Equipped with silk dome tweeters with an "Edge-driven" design for a wider and smoother frequency response. This technology ensures crystal clear high-frequency sound without any hardness, regardless of volume.

High Fidelity Audio Performance: This 165mm (6-1/2") speaker system delivers robust 90W RMS power and can reach 720W peak. Its frequency response ranges from 60 Hz to 20 kHz with a sensitivity of 90 dB.

Stylish Infinity ID Design: Introduces a new, more elegant industrial design, designed specifically for sound enthusiasts wishing to enhance the style and acoustics of their original system.

Complete System Content: The kit includes 2 speakers, 2 protective grilles, 2 19 mm (0.75") tweeters, 2 filter housings (crossover), threaded flush mount adapters, screws and fixing clips.

Product Specifications

Brand: Infinity
Model: INFSPKAL603C
Colour: Black
Size: 6.5"|(165mm)
Pack Size: 2 items
ASIN: B0GF26K3L5
Category: Electronics & Photo > Car & Vehicle Electronics > Car Electronics > Audio > Speakers > Built-In Speakers
Domain: Amazon UK
Release Date: 05 May 2025
Listed Since: 23 February 2026

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Infinity Alpha 603C 165mm 2-Way Speaker System, Plus One Cone, Edge-Driven Silk Dome Tweeter, 90W RMS, with Grid, High Fidelity Sound for Premium Upgrade.

It has never been this cheap. We have no record of a lower price.

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