can a 8'' sub be used for mid bass?
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=122051
Printed Date: May 02, 2024 at 2:22 PM
Topic: can a 8'' sub be used for mid bass?
Posted By: cvame
Subject: can a 8'' sub be used for mid bass?
Date Posted: May 29, 2010 at 11:48 PM
Im considering installing a Fosgate P2D48 centered under the dash of my F250 Crew Cab, and use it as mid bass fill. I will be powering it with the sub channel from a 5channel amp. I have 2 P2S10"s in the back powered seperately. Ive had people tell me im crazy and its a waste of time and money. Is this a good idea? or am i really wasteing my time?
Thanks
Replies:
Posted By: KPierson
Date Posted: May 30, 2010 at 9:38 AM
I used to have two 8" "subs" for midbass and I loved them.
It all depends on how you have them crossed over and the other speakers in the system.
I believe my subs were crossed over at 60 hz and the 8" speakers played from 60 - 400hz or so (may have been less). Then the 5 1/4s played the rest. ------------- Kevin Pierson
Posted By: cvame
Date Posted: June 01, 2010 at 2:25 AM
Thanks for the reply KP,
Now its between a single 8" sub in the center front, OR two 8" in the front door, OR two of JL audios 6.5" subs in the front door..... Either way im gonna try it. Especially since my buddies all say it won't sound good....
Posted By: nismo542
Date Posted: June 06, 2010 at 12:56 AM
perfect for midbass as long as you use a crossover so you only send them midbass
Posted By: nismo542
Date Posted: June 06, 2010 at 12:57 AM
you will need an adjustable crossover that you can set at "bandpass" so you can send 100-500 Hz only
Posted By: cvame
Date Posted: June 06, 2010 at 3:33 AM
Which ones are perfect "nismo"? The 8" or 6.5"?
Posted By: stevdart
Date Posted: June 06, 2010 at 9:56 AM
The fifth channel of the amplifier will provide the crossover function to send only sub bass to your bass speaker. Whether you use on or two might depend on these questions: is this single 8" sub a 2 ohm impedance? That would be the ideal load if using just one. If the speaker is 4 ohms, using two in parallel would put a 2 ohm load on the amp and the increased cone area will provide greater volume to work with. Further, you do not need stereo separation for sub bass. Your fronts should reside in the doors and will provide the true midbass.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: cvame
Date Posted: June 07, 2010 at 2:01 AM
Thank you Steve, thats the direction ill be going now. Two 4ohm's in the front doors. Just trying to decide between the Fosgate 8's or the JL 6.5" subs.... This install keeps getting pushed back in favor of the wifes van capacitor problem - lol
Posted By: kyle_h
Date Posted: March 08, 2011 at 7:39 PM
cvame] wrote:
Im considering installing a Fosgate P2D48 centered under the dash of my F250 Crew Cab, and use it as mid bass fill. I will be powering it with the sub channel from a 5channel amp. I have 2 P2S10"s in the back powered seperately. Ive had people tell me im crazy and its a waste of time and money. Is this a good idea? or am i really wasteing my time?
Thanks
I was also looking into 8" sub for my "midbass" but on another forum, everyone was saying it's stupid and won't work. I don't really see how it wouldn't.
KPierson wrote:
I used to have two 8" "subs" for midbass and I loved them.
It all depends on how you have them crossed over and the other speakers in the system.
Did you wire them as 1 channel EACH or all together like a sub?
That's one thing I'm confused about when it comes to midbass drivers. Are they wired like components or subs? And what makes a 6.5" midbass different from a 6.5" component speaker? ------------- -Kyle
2006 Mazda 6i
2001 GMC Sierra 2500 HD
Posted By: KPierson
Date Posted: March 08, 2011 at 7:57 PM
I believe my 8" midbasses were powered off of 2 channels of a 4 channel Kicker amp. I do remember that I had to wire them out of phase because of their mounting arrangement.
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Kevin Pierson
Posted By: cvame
Date Posted: March 09, 2011 at 2:53 PM
Kyle_H,
I was directed shortly after to another car audio forum where my same question sparked a debate over the art of mid bass that is probably still ongoing today after i stopped posting there.... I did alot of reading and listened to what all these audiophiles had to say. It became extremely confusing because they were getting into terms and math formulas that were WAY beyond my level.... What i did find by one that broke it down to me was that mid bass, arguably, lies some where between 80-400hz... But unless your looking to win pro competitions, its more a matter of personal taste... Which its why "midbass is the hardest thing to tune in your system". The other hard part i found was finding a good variable bandpass filter. They explained how i could make one myself...but again WAY over my head...haha. There are off brand amps out there that have them built in, but cost $$$! .... So to make a long story short, i ran the single 8" for awhile crossed over above 60hz. off a bridged 2 channel amp. It did what i was looking for, filling in the missing bass up front of my large cab. Then to an 8' in each front door crossed over at the same Hz. I personally found keeping them mono with the gain turned down a little sounded better overall...again, "for what my tastes are".... From a shadetree DIY stereo installer, my advice is experiment with it in a temporary set up and fiddle with the sound and see what it is your preference is.... OR if your looking for that absolute perfect frequency then ill try to find the forum i was on and you can pick up where i left off at......I hope this helped? (or at least made sense, Ha) Good Luck
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