RetroSound Standard Stereo Speakers Mylar Tweeters Sold as a Pair 25w RMS
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The RetroSound S-42 is a pair of 4-inch 2-way car speakers with Mylar tweeters and a ceramic magnet, rated at 25W RMS with a 37mm mounting depth. Part of RetroSound's Standard speaker range, they are a straightforward replacement for 4-inch speaker locations in classic cars and trucks.
Key specifications
- Model: S-42
- Size: 4 inch, 2-way (sold as a pair)
- Power handling: 25W RMS / 50W max
- Impedance: 4 ohm
- Frequency response: 65Hz – 21kHz
- Sensitivity: 88dB (1W/1m)
- Mounting depth: 37mm (1.45 inch)
- Grilles: not included
RetroSound S-42
RetroSound Stereo Speakers are designed for classic cars and trucks. The S-42 uses a ceramic magnet structure for high power handling alongside a dip-cut design to reduce distortion. Mylar tweeters deliver crisp, clear highs, while treated foam surrounds provide durable, accurate audio reproduction. Also available as the RetroSound Premium Stereo Speakers 4x6 inch with grilles if you need a larger size with grilles included.
- 4-inch stereo speakers (sold as a pair)
- Ceramic magnet structure for high power handling
- Treated foam surrounds for remarkable durability
- Mylar tweeters for crisp, clear highs
- Dip-cut magnet for enhanced sound
- TrueRating power handling: 25W RMS / 50W max
Explore the full range in RetroSound Speakers.
Specification
| Frequency Response | 65Hz-21kHz |
|---|---|
| Sensitivity | (SPL@1w/1m) 88dB |
| Power Handling | (watts RMS/peak) 25/50 |
| Mounting Depth | (inch) 1.45 |
| Mounting Depth | (mm) 37 |
More specs
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What's Included
- 2x Speakers
- 2x Wire
- 8x Screws
- 8x Speed Clips
RetroSound
About the RetroSound S-42
From our tech experts at CEN
Speakers, rated at 25w RMS, designed for classic cars rather than modern door cards.
Who it suits
Classic car owners replacing tired or failed speakers with something that fits the original openings.
Our tech experts advise
In older cars the limiting factors are aperture size, mounting depth and the state of the wiring rather than the speaker itself. We check all three before ordering. get in touch. See car audio installation.
Explore the full RetroSound range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all RetroSound
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Compare - RetroSound® Radio Motors Feature Sets
Choose a Radio Motor to select the radio features that matter most for your classic vehicle.
Motor 1
- Built-in Bluetooth®
- Power Output 4×18w RMS
- Fixed White Display
- Auxiliary Inputs
- 1 Year Warranty
Motor 1 DAB
- Built-in Bluetooth®
- Built-in DAB/DAB+ Tuner
- Power Output 4×18w RMS
- Fixed White Display
- Auxiliary Inputs
- 1 Year Warranty
Motor 2
- Built-in Bluetooth®
- Power Output 4x25w RMS
- Adjustable Colour display
- 2.1A Charging via USB
- USB Port
- Dual RCA pre-outs
- Dedicated subwoofer output
- 1 Year Warranty
Motor 6
- Built-in Bluetooth®
- Built-in DAB/DAB+ Tuner
- Power Output 4×25w RMS
- Adjustable Colour Display
- Two USB Ports
- 2.1A Charging via USB
- Auxiliary Inputs
- Dual RCA pre-outs
- Dedicated subwoofer output
- 2 Year Warranty
More from RetroSound Speakers
More options from the same range, in stock and ready to go
Best Seller RetroSound Triax Deluxe Dual Voice Coil 4x8 Inch Single Stereo Speaker 60w RMS £79.99 /In stock
Best Seller RetroSound Premium Single 2-Way Speaker 4x10 Inch with Bracket RS-UB1KT 90w RMS £79.99 /In stock
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: What size are the RetroSound S-42 speakers?
A: They are 4 inch 2-way speakers, sold as a pair, with a 37mm (1.45 inch) mounting depth.
Q: Do the S-42 speakers come with grilles?
A: No. The box contains two speakers, two wires, eight screws and eight speed clips.
Q: What tweeters do the S-42 speakers use?
A: They use Mylar tweeters for crisp, clear highs, with treated foam surrounds and a ceramic magnet.
