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Bio 8 Inch D4

$59.99
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
  • Bio 8 Inch D4 Subwoofers- CT Sounds Car Audio
If you are thinking of adding an entry level car audio sub that will give you sheer quality bumps while you think of quality SQ, check out the newest addition to the CT Family, the Bio 8 Inch Subwoofer D4. This sub is 150W RMS and able to take 300W MAX off the amplifiers you use and is pretty commendable for the price compared to its quality. Check out further specifications below-

Whats in the box:

  • 1 x Bio 8" D4 Car Subwoofer (Dual 4 ohm)

Features:

  1. Dual 4Ω (ohm) resistive (voice coil) subwoofer
  2. 150W RMS car audio sub & can take up to 300W PEAK
  3. Dual connectivity terminals with 2" (diameter) voice coil make this product versatile irrespective of its size, dimensions and power consumption
  4. Incorporates Y30 graded ferrite magnet
  5. Strong & sturdy basket frame, capable of handling high diaphragm moves with maximum Xmax

Technical Specifications:

  1. Sub power: 150W (RMS) | 300W (MAX) 
  2. Subwoofer size: 8"
  3. Subwoofer type/ impedance: Dual 4 ohm
  4. Voice coil (diameter): 2" (51mm)
  5. BL: 17.490
  6. FS: 45.901Hz
  7. QTS: 0.412
  8. QES: 0.433
  9. QMS: 8.559
  10. VAS: 10.10 liters
  11. SPL: 85.4 dB (@1w/1m)
  12. Xmax: 14.2mm (Peak to peak)

Box Specifications:

  1. Sealed: 0.30 ft3
  2. Ported: 0.40 ~ 0.75 ft3

Mounting / Installation Parameters:

  1. Cutout diameter: 183mm / 7.2"
  2. Overall diameter: 213mm / 8.4"
  3. Mounting depth: 114mm / 4.5"

Key Things to Know About Our Shipping Process:

  • Orders are typically delivered in 3-7 business days
  • We ship orders from more than 50 different warehouses
  • Orders of more than 1 pcs may be shipped seperately
  • Items may be shipped from different locations and carriers
  • Rest assure your order is being processed and is on it's way
  • You may not receive a tracking number until the day before delivery 
  • For Pre-Order please see the product page for the estimated shipping time

 

Do not worry if:

  • You don't receive a tracking number immediately 
  • You receive your order and items are missing
  • It has been less than 7 business days and you have not received your order
  • If your item is a pre-order, it will ship as soon as it comes in stock.

 

What do I do if:

  • It has been 7 business days and you have not received a tracking number or your full order
  • Your order arrives and the item is damaged
  • You recieve the wrong items
  • You recieve the wrong qty

If any of the above issues happen send us an email at ordersupport@ctsounds.com - please include your order number and be as detailed as possible in your initial email so we can resolve any issue you have as quickly as possible

 

Shipping Policy and Process Explained:

We use over 50 different warehouses across the US that we use to ship orders. We use a unique way of shipping to ensure items reach our customers as quickly as possible while being cost effective. Often times we use multiple carriers to ship a single order because of this we do not provide the customer with a tracking number until the final carrier that will be delivering the order has the package. Tracking numbers are often not sent out until the day before or even the day of delivery so if you have not recieved a tracking number that does not mean your order is not already on the way. If you do not have your full order within 7 business days (unless you ordered a pre-order item) of placing your order please email ordersupport@ctsounds.com  

 

 

If you need to return or warranty a product you can do so at anytime by opening a claim at the link below:

https://www.ctsounds.com/a/returns 

 

*For pre-orders please check the product page for the estimated shipping date.

**Keep in mind that Holidays may cause minor delays in shipping times for some orders.  

DON'T LOVE IT? RETURN IT FOR FREE. *

We have a 30-Day Money Back Return Policy

Here at CT Sounds we stand behind our product and we believe so much in our product that if you are not 100% satisfied with your purchase you can send them back within 30 days for a full refund or store credit using our prepaid return shipping label.

Step 1 || Submit a Return Request.

Step 2 || A prepaid return label will be sent to you via email

Step 3 || Returns are processed within 2 - 3 business days of being delivered at CT Sounds. An email will be dispatched when your return is processed. 

 

*For a full length version of our Return Policy Click Here.

 

(UNLESS PRODUCT PAGE STATES DIFFERENTLY. ALWAYS READ THE PRODUCT DESCRIPTION BEFORE ORDERING. NO REFUNDS ON PRE-ORDER ITEMS. PERIOD. NOTE: OUR SUBWOOFER BOXES ARE MADE TO ORDER BECAUSE OF THIS WE DO NOT ALLOW REFUNDS ON ANY SUBWOOFER BOXES.)

All purchases from www.ctsounds.com come with a 90-Day Limited Warranty. Please see the policy below. 

 

To start the warranty process by opening a claim at the below link:

https://www.ctsounds.com/a/returns

 

We do sell a 1 year, 2 year, and 3 year extended warranty on most products we offer. This extended warranty is offered through Clyde. You can see the cost below the add to cart button on the product page. If you are interested in the extended warranty it MUST be purchased at the same time your purchase the product. You can select the extended warranty you want below the add to cart button before adding the item to your cart. You can also add the extended warranty to your pruchase by going to your cart and clicking the "+Add product coverage" button. 

 

Warranties are non-transferable! 

 

Our 90-Day Limited Warranty covers defects in materials and/or workmanship ONLY. Our warranty does not cover user error, accidental damage, improper installation, and/or product abuse. 

 

IF YOU DID NOT PURCHASE YOUR CT SOUNDS EQUIPMENT FROM WWW.CTSOUNDS.COM THEN YOUR ITEMS ARE NOT COVERED UNDER OUR WARRANTY

Customer Reviews

Based on 11 reviews
100%
(11)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
W
W.G.

Bio 8 Inch D4

J
J.P.
Subwoofer

Very good sub

C
C.S.
Nice subs love them

Awesome

S
S.S.
Bio 8

I have yet to install these but I opened the box and I’m surprised on how beefy they are. I do have 2 bio 12’s and if these are anything like them they will be perfect for my install

O
O.C.

Sounds amazing!! Love CT Sounds!

Bio 8 Inch D4

$89.99 -33%
$59.99

Bio 8 Inch D4

$89.99 -33%
$59.99

100 Available

Easy returns

Best quality

Safe checkout

Type Subwoofers
Description
If you are thinking of adding an entry level car audio sub that will give you sheer quality bumps while you think of quality SQ, check out the newest addition to the CT Family, the Bio 8 Inch Subwoofer D4. This sub is 150W RMS and able to take 300W MAX off the amplifiers you use and is pretty commendable for the price compared to its quality. Check out further specifications below-

Whats in the box:

  • 1 x Bio 8" D4 Car Subwoofer (Dual 4 ohm)

Features:

  1. Dual 4Ω (ohm) resistive (voice coil) subwoofer
  2. 150W RMS car audio sub & can take up to 300W PEAK
  3. Dual connectivity terminals with 2" (diameter) voice coil make this product versatile irrespective of its size, dimensions and power consumption
  4. Incorporates Y30 graded ferrite magnet
  5. Strong & sturdy basket frame, capable of handling high diaphragm moves with maximum Xmax

Technical Specifications:

  1. Sub power: 150W (RMS) | 300W (MAX) 
  2. Subwoofer size: 8"
  3. Subwoofer type/ impedance: Dual 4 ohm
  4. Voice coil (diameter): 2" (51mm)
  5. BL: 17.490
  6. FS: 45.901Hz
  7. QTS: 0.412
  8. QES: 0.433
  9. QMS: 8.559
  10. VAS: 10.10 liters
  11. SPL: 85.4 dB (@1w/1m)
  12. Xmax: 14.2mm (Peak to peak)

Box Specifications:

  1. Sealed: 0.30 ft3
  2. Ported: 0.40 ~ 0.75 ft3

Mounting / Installation Parameters:

  1. Cutout diameter: 183mm / 7.2"
  2. Overall diameter: 213mm / 8.4"
  3. Mounting depth: 114mm / 4.5"
Reviews

Customer Reviews

Based on 11 reviews
100%
(11)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
W
W.G.

Bio 8 Inch D4

J
J.P.
Subwoofer

Very good sub

C
C.S.
Nice subs love them

Awesome

S
S.S.
Bio 8

I have yet to install these but I opened the box and I’m surprised on how beefy they are. I do have 2 bio 12’s and if these are anything like them they will be perfect for my install

O
O.C.

Sounds amazing!! Love CT Sounds!

Shipping Policy

Key Things to Know About Our Shipping Process:

  • Orders are typically delivered in 3-7 business days
  • We ship orders from more than 50 different warehouses
  • Orders of more than 1 pcs may be shipped seperately
  • Items may be shipped from different locations and carriers
  • Rest assure your order is being processed and is on it's way
  • You may not receive a tracking number until the day before delivery 
  • For Pre-Order please see the product page for the estimated shipping time

 

Do not worry if:

  • You don't receive a tracking number immediately 
  • You receive your order and items are missing
  • It has been less than 7 business days and you have not received your order
  • If your item is a pre-order, it will ship as soon as it comes in stock.

 

What do I do if:

  • It has been 7 business days and you have not received a tracking number or your full order
  • Your order arrives and the item is damaged
  • You recieve the wrong items
  • You recieve the wrong qty

If any of the above issues happen send us an email at ordersupport@ctsounds.com - please include your order number and be as detailed as possible in your initial email so we can resolve any issue you have as quickly as possible

 

Shipping Policy and Process Explained:

We use over 50 different warehouses across the US that we use to ship orders. We use a unique way of shipping to ensure items reach our customers as quickly as possible while being cost effective. Often times we use multiple carriers to ship a single order because of this we do not provide the customer with a tracking number until the final carrier that will be delivering the order has the package. Tracking numbers are often not sent out until the day before or even the day of delivery so if you have not recieved a tracking number that does not mean your order is not already on the way. If you do not have your full order within 7 business days (unless you ordered a pre-order item) of placing your order please email ordersupport@ctsounds.com  

 

 

If you need to return or warranty a product you can do so at anytime by opening a claim at the link below:

https://www.ctsounds.com/a/returns 

 

*For pre-orders please check the product page for the estimated shipping date.

**Keep in mind that Holidays may cause minor delays in shipping times for some orders.  

Money Back Return Policy

DON'T LOVE IT? RETURN IT FOR FREE. *

We have a 30-Day Money Back Return Policy

Here at CT Sounds we stand behind our product and we believe so much in our product that if you are not 100% satisfied with your purchase you can send them back within 30 days for a full refund or store credit using our prepaid return shipping label.

Step 1 || Submit a Return Request.

Step 2 || A prepaid return label will be sent to you via email

Step 3 || Returns are processed within 2 - 3 business days of being delivered at CT Sounds. An email will be dispatched when your return is processed. 

 

*For a full length version of our Return Policy Click Here.

 

(UNLESS PRODUCT PAGE STATES DIFFERENTLY. ALWAYS READ THE PRODUCT DESCRIPTION BEFORE ORDERING. NO REFUNDS ON PRE-ORDER ITEMS. PERIOD. NOTE: OUR SUBWOOFER BOXES ARE MADE TO ORDER BECAUSE OF THIS WE DO NOT ALLOW REFUNDS ON ANY SUBWOOFER BOXES.)

Warranty Policy

All purchases from www.ctsounds.com come with a 90-Day Limited Warranty. Please see the policy below. 

 

To start the warranty process by opening a claim at the below link:

https://www.ctsounds.com/a/returns

 

We do sell a 1 year, 2 year, and 3 year extended warranty on most products we offer. This extended warranty is offered through Clyde. You can see the cost below the add to cart button on the product page. If you are interested in the extended warranty it MUST be purchased at the same time your purchase the product. You can select the extended warranty you want below the add to cart button before adding the item to your cart. You can also add the extended warranty to your pruchase by going to your cart and clicking the "+Add product coverage" button. 

 

Warranties are non-transferable! 

 

Our 90-Day Limited Warranty covers defects in materials and/or workmanship ONLY. Our warranty does not cover user error, accidental damage, improper installation, and/or product abuse. 

 

IF YOU DID NOT PURCHASE YOUR CT SOUNDS EQUIPMENT FROM WWW.CTSOUNDS.COM THEN YOUR ITEMS ARE NOT COVERED UNDER OUR WARRANTY

x

★ CT Sounds Reviews

Let customers speak for us

2128 reviews
90%
(1914)
6%
(125)
2%
(44)
1%
(14)
1%
(31)
Built like a tank

Solid Build. Haven't pushed it to its RMS yet but sounds great.

Tropo xl 12 inch

These subwoofers are by far the best product I've bought. The price for the performance is staggering and i need to line more panels in my car with hush mat because of the rattling. Definitely a recommended product and planning to purchasing some 6x9 meso series.

This thing pounds!!

I love it and I am waiting for an amp to be available to go with the sub!!! Kicker has some competition!!

Nice

Super fast and nice

The Best Subs for the money period

Bought two tropo xl 10 d4’s wired them to 1 ohm on a 1000 watt amp. These subs have exceeded every expectation I had for them in every aspect Coleman Thedinger is doing great things for the CT Sounds Community. Looking forward to many more of these great products.