BIO-10 400 Watts RMS 10 Inch Car Subwoofer vs BIO-12 400 Watts RMS 12 Inch Car Subwoofer
Buy the BIO-12 if you want more output and deeper bass; it costs $79.99 at CT SOUNDS as of November 3 versus $69.99 for the BIO-10. The BIO-10 fits tighter spaces and smaller boxes and saves you about $10. Both are 400-watt RMS dual 2-ohm entry subs from the same line, so the real choice is cone size and box space.
Today the BIO-10 400 Watts RMS 10 Inch Car Subwoofer costs $10.00 less at its best price.
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BIO-10 400 Watts RMS 10 Inch Car Subwoofer
5$69.99at CT SOUNDSObserved at 8:03 AM
Choose the BIO-10 if your box or trunk space is tight or you want to spend the least on a first sub.
Pros
- Lowest entry price in the line at $69.99
- Fits small sealed or ported boxes and shallow trunks
- Dual 2-ohm coil gives a 1-ohm or 4-ohm final load
- Same 2.4-inch copper coil and air cooling as the 12
Cons
- Less cone area means less output and less deep bass
- Only 11 ratings so far
- Not water resistant
What separates them
| BIO-10 400 Watts RMS 10 Inch Car Subwoofer | BIO-12 400 Watts RMS 12 Inch Car Subwoofer | |
|---|---|---|
| Cone diameter | 10 inches | 12 inches |
| RMS power rating | 400 watts (800 max) | 400 watts (800 max) per the product page; the spec list says 650 watts RMS |
| Voice coil | Dual 2 ohm, 2.4-inch 4-layer copper | Dual 2 ohm, 2.4-inch 4-layer copper |
| Box space needed | Smaller sealed or ported box | Larger box for the 12-inch driver |
| Output and low-end extension | Less cone area, less deep bass | More cone area, louder and deeper |
| Enclosure types | Flush mount, pairs with CT Sounds prefab boxes | Sealed or ported, pairs with CT Sounds prefab boxes |
| Ratings | 5 out of 5 from 11 ratings | 4.8 out of 5 from 47 ratings |
| Best new price |
Price history
$129.99$69.99
- BIO-10 400 Watts RMS 10 Inch Car Subwoofer: lowest $69.99 on Oct 30 at Amazon.
- BIO-12 400 Watts RMS 12 Inch Car Subwoofer: lowest $79.99 on Oct 30 at Amazon; $79.99 on Nov 2.
Prices at every store
BIO-10 400 Watts RMS 10 Inch Car Subwoofer
- CT SOUNDSNew
In stockReturn policy
$69.99Observed at 8:03 AM
Also available at
- Platinum High Performance Solutions, LLC.Check price at Platinum High Performance Solutions, LLC.
- AmazonCheck price at Amazon
- eBayCheck price at eBay
BIO-12 400 Watts RMS 12 Inch Car Subwoofer
- CT SOUNDSNew
In stockReturn policy
$79.99Observed at 8:03 AM
Also available at
- AmazonCheck price at Amazon
- CT SoundsCheck price at CT Sounds
- eBayCheck price at eBay
Specs compared
| Spec | BIO-10 400 Watts RMS 10 Inch Car Subwoofer | BIO-12 400 Watts RMS 12 Inch Car Subwoofer |
|---|---|---|
| Audio Output Mode | Stereo | — |
| Mounting Type | Flush Mount | — |
| Enclosure Material | Iron | — |
| Speaker Type | Subwoofer | — |
| Antenna Location | Car Audio | — |
| Subwoofer Diameter | 10 inches | — |
| Control Method | Remote | — |
| Speaker Size | 10 inches | — |
| Woofer Diameter | 10 inches | — |
| Water Resistance Level | Not Water Resistant | — |
Questions and answers
- Which is better for deep bass, the BIO-10 or BIO-12?
- The BIO-12. The larger cone moves more air, so it plays lower and louder in a proper box. The BIO-10 is the pick only when space is tight.
- Is the BIO-12 worth $10 more than the BIO-10?
- Yes for most buyers. At $79.99 versus $69.99 at CT SOUNDS as of November 3, 2026, the extra $10 buys noticeably more output.
- What amplifier do these subs need?
- Both are 400-watt RMS dual 2-ohm subs, so a mono amp rated around 400 to 500 watts RMS at 1 ohm is a good match. Wire the coils in parallel for a 1-ohm load.
- Do they fit the same box?
- No. The BIO-12 needs a larger cutout and more airspace. Use a CT Sounds prefab box sized for the 10 or the 12, not one box for both.
- Which lasts longer?
- Both use the same 2.4-inch 4-layer copper coil and air cooling, so life depends mostly on clean power and a correctly tuned box. Neither is water resistant, so keep them dry.
- How many ratings does each have?
- The BIO-10 has 11 ratings at 5 out of 5. The BIO-12 has 47 ratings at 4.8 out of 5, so it has more buyer history.
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