Alpine S2-S65C S-Series 6.5" 80W RMS (240W Peak Power Handling) 4 Ohm, 2-Way Component Speaker System with Two Cloth Dome Tweeters
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What's Inside?
- •(2) Woofers
- •(2) Woofer mount adapter brackets
- •(2) Tweeters (each has a 29" length of wire attached)
- •(2) Flush mount housings (with tweeters installed)
- •(2) Tweeter grilles (fixed)
- •(2) 37" Tweeter wires with in-line crossovers (each has quick slides on both ends)
- •(2) Flush mount retention rings
- •(2) Stealth brackets
- •(2) Foam self-adhesive pads
- •(2) Foam self-adhesive rings
- •(8) 1-1/8" Screws
- •(8) M4x6.5mm Machine screws with split lock washers attached
- •(8) M4 Nuts
- •(6) Flat washers
- •(8) Speed clips
- • Owner's Manual
Why Choose Alpine S2-S65C Component Speakers
Alpine S2-S65C 6.5” Component Speaker Upgrade – Clean Sound, Strong Bass & Factory Fit Performance
The Alpine S2-S65C is a premium 6.5-inch component speaker system built for clear sound, strong midbass, and easy factory speaker replacement. With 80W RMS / 240W peak power handling, it delivers clean, dynamic output when paired with a proper amplifier, making it a solid upgrade for stock car audio systems.
HAMR Woofer Technology for Tight Midbass & Low Distortion
Designed with Alpine’s HAMR surround and hybrid cone woofer, the S2-S65C improves bass control, reduces distortion, and delivers punchy midbass performance. Ideal for users searching for best 6.5 component speakers for bass and clarity and OEM door speaker upgrades, it brings tighter, more accurate low-end response.
Silk Dome Tweeters for Clear Vocals & Better Sound Imaging
The 1-inch silk dome tweeters deliver smooth highs and clear vocals without harshness, while the swivel design allows better sound direction and staging. With included grilles for clean installation, the S2-S65C is perfect for anyone looking for a clean, high-quality car audio upgrade with improved clarity and imaging.
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Alpine S2-S65C Installation Guide & Setup Chart | Best Amp Settings, Wiring & Sound Tuning
Alpine S2-S65C Installation & Setup Guide
Step-by-Step Component Speaker Installation for Clean Sound, Strong Midbass & Safe Tweeter Performance
Installation Overview
System Type: 6.5" 2-Way Component Speaker System
Recommended Use: Front stage upgrade (daily driving + clarity-focused builds)
Best Power Range: Use clean RMS power from a quality amplifier (avoid clipping)
Goal: Accurate imaging, controlled midbass, and smooth tweeter response
Step-by-Step Installation Process
Step 1 – Door Panel Removal: Carefully remove factory door panels and locate OEM speaker position.
Step 2 – Speaker Mounting Prep: Use adapter rings if required for secure 6.5" fitment.
Step 3 – Midbass Installation: Mount woofer tightly to reduce vibration and air leakage.
Step 4 – Tweeter Placement: Install tweeters at ear level (A-pillar, sail panel, or dash corners preferred).
Step 5 – Crossover Setup: Mount passive crossovers in a dry, hidden location inside the door or cabin.
Step 6 – Wiring: Run speaker wire cleanly, avoiding power cable interference.
Step 7 – System Check: Test polarity (+ / -) before final reassembly.
Wiring & Crossover Recommendations
Midbass (Woofer): Connect via passive crossover LOW output
Tweeter: Connect via passive crossover HIGH output (do NOT bypass protection)
Polarity: Maintain correct phase alignment for imaging accuracy
Amplifier HPF: 80Hz – 100Hz (protects door speakers from low-frequency strain)
Gain Setting: Set using clean signal method (avoid distortion at high volume)
DSP / Sound Tuning Recommendations (Optional Upgrade)
Front Stage HPF: 80Hz – 90Hz for midbass control
Tweeter HPF: 3.2kHz – 3.8kHz (24dB slope preferred)
EQ: Start flat, then adjust for vehicle cabin response
Time Alignment: Align driver position for centered vocals
Balance: Keep front-biased soundstage for imaging clarity
Pro Tip: The S2-S65C performs best when properly installed with solid door damping and correct crossover tuning. Avoid bass boost and rely on clean amplification for long-term speaker durability and clarity.
Frequently Asked Questions (FAQ)
• Why do my Alpine S2-S65C speakers have weak bass?
The most common cause is powering the speakers directly from a factory radio. Many owners report improved midbass and overall impact after adding a dedicated amplifier and properly sealing the doors. Also check for reversed speaker polarity, which can significantly reduce bass output.
• Why do my Alpine S2-S65C speakers distort when bass hits?
Distortion is usually caused by insufficient amplifier power, clipping from the head unit, or incorrect crossover settings. Setting a high-pass filter around 70-80Hz can help prevent excessive low-frequency strain on the speakers.
• Why do my Alpine S2-S65C tweeters sound too bright?
Some listeners find the tweeters slightly sharp when installed close to ear level. Reducing treble EQ settings, adjusting tweeter placement, or using DSP tuning can create a smoother sound signature.
• Why don't my Alpine S2-S65C speakers get very loud?
The S2-S65C is designed to perform best with amplifier power. While they can run from an aftermarket head unit, many users report noticeably higher output and better dynamics when powered with 50-80 watts RMS per channel.
• Why do my Alpine S2-S65C speakers sound better on one side than the other?
This is often caused by wiring polarity issues, crossover wiring mistakes, or balance and fade settings. Checking all speaker connections can usually resolve uneven sound output.
• Why do my Alpine S2-S65C speakers lose bass after installation?
Many installers discover that factory door panels leak air around the speaker mounting surface. Using foam speaker rings, sound deadening, and proper mounting adapters can significantly improve bass response.
• Do Alpine S2-S65C speakers need a subwoofer?
The S2-S65C provides strong midbass for a 6.5-inch component set, but it is not designed to reproduce deep sub-bass frequencies. If you want strong low-end impact below 70Hz, adding a dedicated subwoofer is recommended.
• Why don't my Alpine S2-S65C speakers fit my vehicle?
Some vehicles require adapter brackets, spacer rings, or minor modifications due to mounting depth and magnet clearance. Always verify speaker depth and fitment before installation.
• Why is one Alpine S2-S65C speaker not working?
A non-working speaker is typically caused by loose wiring, crossover connection issues, amplifier channel problems, or damaged factory wiring. Inspect all connections before replacing any components.
• Are Alpine S2-S65C speakers worth upgrading from factory speakers?
Most owners report significantly improved clarity, imaging, and detail compared to factory speakers. For the best results, pair them with proper amplification and sound treatment rather than relying solely on factory power.
Alpine S2-S65C Videos & Reviews
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- Diameter : 6.5 Inch
- Sensitivity : 88 dB
- Frequency Response : 55-40000 Hz
- RMS Power Range : 80 Watts
- RMS Power Handling : 240 Watts
Features:
- Hi-Res Audio Certified: Provides ultra-wide frequency response (55Hz–40kHz) for detailed, high-resolution sound, including frequencies beyond human hearing.
- Powerful & Clear: Handles up to 80W RMS (240W peak) with low distortion thanks to polypropylene, glass fiber, and mica woofer cone with High-Amplitude Multi-Roll (HAMR) surround.
- Crisp Highs: 1" cloth dome tweeter with threaded removable housing delivers accurate treble and improved soundstage.
- Optimized Installation: In-line crossover systems make installation easier while ensuring each driver receives the correct frequencies.
- Durable & Versatile: 4-ohm impedance and 2.28" mounting depth make integration with aftermarket or factory systems simple and reliable.
Specifications:
- Configuration: 2-Way Component (Woofer + Tweeter + In-Line Crossover)
- Woofer Size: 6-1/2"
- Woofer Material: Polypropylene / Glass Fiber / Mica
- Surround: High-Amplitude Multi-Roll (HAMR)
- Tweeter Size: 1"
- Tweeter Material: Cloth Dome
- Frequency Response: 55 Hz – 40,000 Hz
- Max RMS Power: 80 W
- Peak Power Handling: 240 W
- Sensitivity: 88 dB
- Impedance: 4 Ohms
- Mounting Depth: 2.28"
- Hi-Res Audio Certified: Yes
- Included Components: 2 Woofers, 2 Tweeters, In-Line Crossovers, Threaded Removable Tweeter Housings
- UPC: 793276085030
- Weight: 8
- Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for repair within 1 year from the original date of purchase with proper return authorization.
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Write a review!
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Man, I'm loving these speakers! Got 'em to swap out the boring stock ones in my new ride, and what a difference they make. While they don't bring tons of bass to the party, the mid-range is just excellent. If you're all about that bass, you gotta go grab a woofer, no doubt. I went the extra mile and tossed in an Alpine 4 channel amp and a subwoofer under the seat, and now my sound system is on a whole new level of awesome!
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The speakers produce some great bass. Tweeters are nice. Great budget speakers for upgrade.
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the speakers sounded great even with my cheap amp. mid bass is much better than the stock and highs are really loud but it can also be a little piercing if you push it too much.
