is it 30 watts rms each ? or 15 rms each to make it 30 rms?

Pretty sure it's 30 each. Still not very high...These would be best suited to to run off a factory unit, or lower powered aftermarket head unit or small amp....It's not as much about the max watts so much as the rms, match that up to your amp whether it's the HU or external amp for best efficiency...

What size amp should i use if i buy 4 of these?

U can use a 400 what's. With low frequency

do you need a wiring harness or any connector?

Mine were direct replacements, the head unit i had bought 3 weeks earlier came with a new conversion harness, I did have to change the connectors on the speaker wires.

do these have to be broken in? My stock speaker is louder than them

I doubt they need much breaking in. I wouldn't play them too hard maybe at first but these are a budget speaker at best, don't think you're going to get real great performance out of them. Your stock speakers probably are louder at the same volume on the radio due to better mid range sensitivity ...most regular oem systems have pretty ho-hum speakers, but do produce decent volume for mid-range sounds.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

CS-J620 300W 6.5" CS Series 2-Way Coaxial Car Speakers, Set of 2, 6.5" Mica Cone Woofer & 1" PEI Tweeter, Hybrid Surround, Easy Installation

Product ID: 20594483

Details

Audio Output Mode
Stereo
Brand
JVC
Connectivity Technology
Coaxial
Frequency Response
22 KHz
Speaker Maximum Output Power
300 Watts

🎵35Hz-22kHz Frequency Range

🔊300W Peak Power

⚙️1-23/32" Shallow Mount Depth

¥15066

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Description

🎶 Upgrade your ride’s soundtrack — don’t just drive, arrive in style!

POWERFUL 300 W PEAK OUTPUT - Feel every beat with booming sound that transforms your drive.
DURABLE MICA CONE PEI TWEETER - Engineered materials deliver premium sound and long-lasting performance.
EASY OBSTACLE FREE INSTALLATION - Shallow mount depth and included accessories get you rocking fast.
WIDE 35 HZ 22 K HZ FREQUENCY RESPONSE - Experience crystal-clear highs and rich lows for immersive audio.
HIGH 92 D B SENSITIVITY 4 Ω IMPEDANCE - Optimized for efficient power use and dynamic sound clarity.

The JVC CS-J620 6.5" 2-way coaxial car speakers deliver a powerful 300W peak output with a broad 35Hz to 22kHz frequency range, ensuring crisp highs and deep bass. Featuring a durable mica cone woofer and PEI tweeter, these speakers combine high sensitivity (92dB) and 4-ohm impedance for efficient, dynamic sound. Designed for easy installation with a shallow 1-23/32" mount depth and included mounting accessories, they’re the perfect upgrade for any car audio enthusiast seeking premium sound quality and hassle-free setup.

Specifications

ASIN	B00OO1ENP4
Additional Features	Mica Cone, Poly-Ether Imide Tweeter, Rubber Surround
Antenna Location	For Music Players
Audio Driver Size	6.5 Inches
Audio Driver Type	Dynamic Driver
Audio Output Mode	Stereo
Best Sellers Rank	#5,929 in Electronics ( See Top 100 in Electronics ) #26 in Car Coaxial Speakers
Brand	JVC
Built-In Media	Speakers
Color	black
Compatible Devices	Car, Truck
Compatible with Vehicle Type	Car, Truck
Connectivity Protocol	Coaxial
Connectivity Technology	Coaxial
Control Method	Touch
Customer Package Type	Standard Packaging
Customer Reviews	4.4 4.4 out of 5 stars (23,726)
Enclosure Material	Mica Injected Polypropylene, Poly-Ether Imide
Frequency Response	22 KHz
Global Trade Identification Number	00809198920240, 04975769413810
Impedance	4 Ohms
Input Voltage	12 Volts (DC)
Is Waterproof	FALSE
Item Dimensions D x W x H	13"D x 8"W x 4"H
Item Weight	2.2 Pounds
MP3 player	No
Manufacturer	JVC
Maximum Range	30 Meters
Model Name	CS-J620
Model Number	CS-J620
Mounting Type	surface mount or flush mount
Number of Audio Channels	2.0
Number of Items	1
Power Source	Corded Electric
Speaker Maximum Output Power	300 Watts
Speaker Size	6.5 Inches
Speaker Type	Coaxial
Specific Uses For Product	Music playback in vehicles
Subwoofer Connectivity Technology	Wired
Subwoofer Diameter	6.5 Inches
Total Ethernet Ports	2
Tweeter Diameter	1 Inches
UPC	613815616498 809198920240 796594442363 046838068355 823019870491
Unit Count	1.0 Count
Warranty Description	30 Days
Warranty Type	Limited
Water Resistance Level	Not Water Resistant
Wireless Technology	Coaxial
Woofer Diameter	6.5 Inches

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

¥15066

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

View all Trustpilot reviews