Harman Kardon Flow 300S 3 Inch Midrange Woofer Speaker Set and Grills 60w RMS
Couldn't Load Pickup availability
The Harman Kardon FLOW 300S is a 3-inch midrange woofer speaker set with grilles, rated at 60W RMS (180W peak), from Harman Kardon's Flow range. Its shallow design suits a wider range of mounting locations, and it is designed to pair with the FLOW 600CF to build a full 3-way system.
This listing is the FLOW 300S 3-inch midrange woofer set. The Flow range also includes the Harman Kardon FLOW 600CF 6.5-inch passive 2-way component set and the Harman Kardon FLOW 75T edge-driven silk dome tweeters.
Key specifications
- Size: 3-inch midrange woofer
- Power handling: 60W RMS, 180W peak
- Sensitivity: 91 dB (2.83V)
- Frequency response: 200 Hz – 10 kHz
- Impedance: 4 ohms
- Cone: aluminium ceramic composite
- Supplied with: grilles, screws, speed clips, EVA foam gasket
Harman Kardon FLOW 300S 3-inch midrange woofer
The FLOW 300S features aluminium ceramic composite cones, a shallow profile for flexible mounting, 60W RMS (180W peak) power handling, and a frequency response of 200 Hz – 10 kHz.
With sensitivity of over 91 dB, the FLOW 300S extends low-frequency response down to 200 Hz. It is designed to work with the FLOW 600CF component set, whose outboard crossover is built to run the combined system as a 3-way.
Explore the full range in Harman Kardon Flow Series.
Specification
| Power Handling | 60Wrms, 180Wpeak |
|---|---|
| Sensitivity | (@ 2.83V ) 91dB |
| Frequency Response | 200Hz–10kHz |
| Impedance | 4ohms |
| Gross weight | 0.75kg |
More specs
| |
What's Included
- Speakers
- Grilles
- Screws
- Speed clips
- EVA foam gasket 1x OM
Harman Kardon
About the Harman Kardon Flow 300S
From our tech experts at CEN
The Harman Kardon FLOW 300S is a pair of 3 inch midrange car speakers with grilles, rated at 60W RMS (180W peak) into 4 ohms. Aluminium ceramic composite cones and 91dB sensitivity cover 200Hz to 10kHz, and the shallow build fits a wide range of dash and door locations.
Who it suits
Drivers building a 3-way front stage who want vocals lifted off the door and up towards ear height. It is designed to sit alongside the FLOW 600CF component set, whose outboard crossover is built to run the combined system as a 3-way.
Our tech experts advise
A midrange this size only earns its place with a proper crossover point, so plan it as part of the whole front stage rather than a bolt-on. Grilles, screws, speed clips and an EVA foam gasket are supplied. Installs are priced per vehicle; see car audio installation.
Explore the full Harman Kardon range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Harman Kardon
Recommended For You
Discover more top-rated gear, handpicked to go with what you're viewing
Have it Fitted By Our Team
Our team fits car audio, stereos, dash cams and vehicle security at our workshop in Beeston, Nottingham. Tell us your vehicle and we'll confirm the parts and a fitted price.
- 1
Tell us your vehicle
Make, model and year, and what you'd like fitted.
- 2
We confirm the parts
Fascia, wiring and interfaces checked for your car, with a fitted price.
- 3
Fitted at our workshop
Bring it to our Beeston workshop and we do the rest.
Unit 25 Technology Drive, Beeston, Nottingham NG9 1LA
More from Harman Kardon
More options from the same range, in stock and ready to go
Harman Kardon Flow 80 Subwoofer BMW Plug & Play Underseat HK Sub 8 Inch 125w RMS
RRP £559.99Save 10%£499.00
Harman Kardon Feel 700 Underseat Sub 7 Inch Active Subwoofer Enclosure 125w RMS
£299.00
Harman Kardon FIT 5F Fit Series 5.25 Inch Hi-Res 2 Way Coaxial Speakers 35w RMS
£149.99
Harman Kardon FIT 96M Fit Series 6x9 Inch 3 Way Component Car Speakers 55w RMS
£249.99
Harman Kardon FIT 6C Fit Series 6.5 Inch 2 Way Component Car Speakers 50w RMS
£269.99
Frequently Asked Questions
Q: Will these speakers fit my car?
A: Most car speakers are standard sizes, but mounting depth and fitting rings vary by vehicle. Check the size in the Specification tab against your vehicle, or contact CEN with your registration and we will confirm fitment and any adapters or fitting kits you need.
Q: Do I need an amplifier to run these speakers?
A: Not always. Most speakers will run from a standard head unit, but a dedicated amplifier lets them perform at their best, particularly for component sets and higher power handling models. The RMS figure in the Specification tab is the guide to how much clean power they can use.
Q: What is the difference between coaxial and component speakers?
A: Coaxial speakers combine the tweeter and woofer in one unit for a simple like-for-like upgrade. Component sets separate the tweeter and woofer with a crossover for better imaging and detail, and suit installs where sound quality is the priority.
Q: Do these come as a pair?
A: Unless stated otherwise, car speakers are sold in pairs. Check the product title and What's Included tab, which lists exactly what is in the box.
Q: Can CEN fit these speakers for me?
A: Yes. CEN offers professional installation from our Nottingham premises. Contact us to book an installation slot or ask for a fitting quote.
Q: Can the FLOW 300S be added to the FLOW 600CF component set?
A: Yes. The FLOW 600CF outboard crossover allows the 6.5 inch 2-way set to operate as a full 3-way system with the addition of the 3 inch FLOW midrange.
Q: What frequency range does the FLOW 300S cover?
A: 200 Hz to 10 kHz, with a sensitivity of 91 dB at 2.83V and 4 ohm impedance.
Q: Does the FLOW 300S come with grilles?
A: Yes. The box includes the speakers, grilles, screws, speed clips and an EVA foam gasket, plus the owner's manual.
Not Sure Where to Start?
Straightforward advice and the latest news from our Nottingham team.
All Guides and News →
Car Audio
Helix Compose i5 Expands: FlexMount Speakers for Cars That Fight Back
Read more →
Car Audio
Pioneer Perfect Fit 9-Inch Stereos: Fitting Kits and Every Car They Fit (2026)
Read the guide →
Car Audio
BMW Speaker Upgrades Explained: Where to Start and What Fits
Read the guide →
Car Audio
Christmas Gift Guide 2026: Car Audio, Dash Cams and Outdoor Tech
Read the guide →
Car Audio
Upgrading Car Audio Without Replacing the Factory Stereo
Read the guide →
Car Audio
Amplifier Wiring Kits Explained: Gauge, Fuses and Earths
Read the guide →