40hz-120hz: I need 8" subs to fill this range

[Marcianello]

My Soundstream 12 is in a ported box tuned to 35hz. When you play bass test tones it really starts to get loud below 40hz. It has a few holes in the spectrum above 40, and everything up to 100 is basically missing. Before I choose component sets for the mids & highs, I want to add a pair of 8" subs mounted on my rear pillars to fill in the missing octaves. My 6.5" drivers usually start around 120hz.

Has anyone had success with a particular sub? I plan on using around .3cf/each sealed, most 8" subs tune much lower when you port them. I dont need anything below 40hz. I found a JL Audio 8W1V3-4 for $130 on Crutchfield, but before I order a pair Id like to get some opinions. Is there a magic woofer that operates well in a small enclosure between 40-100hz? I will probably have a Zapco ASP-Q1 EQ/X-over unless I find something better. (I like knobs.)

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[350zspl 10+ year member]

what 6.5

what amp on them

what is the crossover set at on them

 

[mylows10 5,000+ posts]

Prolly have cancellation issues

 

[shizzzon 10+ year member]

Sounds like you need a midbass, not a subwoofer.

 

[Marcianello]

what 6.5what amp on them

what is the crossover set at on them

I havent designed the mid/uppper levels yet, Im still working around the Soundstream 12. The issue is, the box that Soundstream suggested actually cancels out much of the range above 40hz. I will have 6.5" seperates with passive crossovers and a dedicated 4 channel amplifier. That set will most likely handle everything over 120hz and above. I will be purchasing a larger amp for the single 12" sub, filtered at 40hz. The section I am trying to compensate for is the range between 40 and 120hz. I want to install two 8" woofers in the rear pillars rather than in the rear deck because my 12" takes up a lot of box room in the trunk underneath the rear deck. 35hz tuning requires 3cf for this particular speaker.

By the way, when you construct a box for the 36lb SPLX-122HF and port it properly, the results are ridiculous. I cant wait to pick up a 1000w amp for this DVC. I can barely sit in the car with the 350w Zapco, which is only turned up halfway. I listen to plenty of real music (not bass tests) so I want my mid/upper bass ranges to perform. If you can suggest a pair of 8" woofers that perform in small enclosures and operate between 45 and 120hz I would like to see them. Im not opposed to installling 10" subs, the 1969 Mustangs have plenty of room on each side of the rear seat. However, I would like to retain that extra arm room for passengers and for the sake of not turning my passenger compartment into an audio extravaganza.

By the way, I planned on purchasing a 2000w Autotek to push the Soundstream sub, and moving the 350w Zapco with built in xover & bass boost to the pair of 8"s. I will buy a larger 4ch for the mids/highs later on, but right now they are powered off the deck. Its not great sound quality but Im taking baby steps.

My question is, how to installers and techs normally work out the issue of missing midbass with smaller drivers? Im trying to find someone who has experience filling in these frequencies, without a huge amp or box.

 

[Marcianello]

Sounds like you need a midbass, not a subwoofer.

Shizzon - can you recommenced a setup that will have enough volume to keep up with my SPLX-122HF? I have heard of Focal 6" driver sets that perform well, but I really do not want to spend that kind of $$$. I really like the deep punch that 8" subs can provide for natural music without taking up visible space. Im building a 3way speaker pod from fiberglass on my rear pillar - each side will have an 8" woofer, a 6.5 and a tweeter. If I can find the right set of seperates I will include a 5" upper/mid driver as well. The rear seperates will be on the same 4ch amp as the front, and the 8" subs will have a dedicated monoblock.

 

---------- Post added at 07:58 PM ---------- Previous post was at 07:57 PM ----------

 

Prolly have cancellation issues

Not yet. The Bostons on my doors & rear deck are not amplified.

 

[Jeffdachef 5,000+ posts]

Shizzon - can you recommenced a setup that will have enough volume to keep up with my SPLX-122HF? I have heard of Focal 6" driver sets that perform well, but I really do not want to spend that kind of $$$. I really like the deep punch that 8" subs can provide for natural music without taking up visible space. Im building a 3way speaker pod from fiberglass on my rear pillar - each side will have an 8" woofer, a 6.5 and a tweeter. If I can find the right set of seperates I will include a 5" upper/mid driver as well. The rear seperates will be on the same 4ch amp as the front, and the 8" subs will have a dedicated monoblock. 

---------- Post added at 07:58 PM ---------- Previous post was at 07:57 PM ----------

 

Not yet. The Bostons on my doors & rear deck are not amplified.

You got things all twisted around man. Deep and punch dont belong in the same sentence. Deep is 20 to 30hz where its mainly vibration and airflow. Punch is upper midbass 40 to 80hz which is nowhere near deep.

Different sized subs dont sound different, they are the same just different spl levels due to cone area. Your install and subchoice is lacking plain and simple.

Running an 8 inch sub with a 12 already playing is a recipe for disaster as in you will basically have negative bass from cancellation.

2nd, subs usually dont play high enough cleanly, most youll get is 70hz with authority with a T line enclosure with a smooth roll off to 100hz

 

[350zspl 10+ year member]

front stage 6.5 will play down to 60 hertz in most cases

you don't need 8's

 

[Massive spl]

My Soundstream 12 is in a ported box tuned to 35hz. When you play bass test tones it really starts to get loud below 40hz. It has a few holes in the spectrum above 40, and everything up to 100 is basically missing. Before I choose component sets for the mids & highs, I want to add a pair of 8" subs mounted on my rear pillars to fill in the missing octaves. My 6.5" drivers usually start around 120hz.Has anyone had success with a particular sub? I plan on using around .3cf/each sealed, most 8" subs tune much lower when you port them. I dont need anything below 40hz. I found a JL Audio 8W1V3-4 for $130 on Crutchfield, but before I order a pair Id like to get some opinions. Is there a magic woofer that operates well in a small enclosure between 40-100hz? I will probably have a Zapco ASP-Q1 EQ/X-over unless I find something better. (I like knobs.)

Everyone was trying to help you and you DISLIKED their post. Now no one is going to help you. If your woofer doesn't play above 40hz then it's your box or your amp tuning that's the problem.

 

[Marcianello]

front stage 6.5 will play down to 60 hertz in most cases
you don't need 8's

Thanks, but how would you produce sound between 60 and 35hz? My sub operates well from 40hz on down. Im trying to fill in the space between my sub and the 6.5s

 

[Marcianello]

Everyone was trying to help you and you DISLIKED their post. Now no one is going to help you. If your woofer doesn't play above 40hz then it's your box or your amp tuning that's the problem.

I dont want those people to help me. I want them to go sober up and stop typing on the internets //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

If my woofer doesnt play above 40hz, its because I have specifically built the box to be tuned at 35hz for best efficiency, and filtered out all other frequencies above that. I will tune 2 smaller sealed enclosures to deliver the range between 40-100hz, and hang them right inside the cabin on each side of the rear window.

If you have 4 18s, why do you need 2 10s? Maybe your box or amp tuning is such a problem that your 18s can produce enough sound?

 

[350zspl 10+ year member]

set your LPF crossover on your sub woofer amp at 80 hertz this will allow signals 80 and below to pass

buy the components

I have these

SA-65CS v.2

buy the amp for the 6.5's

i have this

SAX-100.4 v.2

I run it bridged with the HPF set at 50 hertz allowing signal 50 and up to pass

turn off your head units crossovers, EQ settings, base boost , loudness settings

 

[Marcianello]

set your LPF crossover on your sub woofer amp at 80 hertz this will allow signals 80 and below to pass

Thanks 350, I have heard good things about the SAX series. Setting the filters at 80hz will do nothing until I add more drivers and a separate amp. I like the current configuration of my 12" sub design.

Im putting two 8"s in my cabin, im looking for help finding a good set that delivers well between 40-100hz in a small enclosure. Somebody on another forum recommended Fosgates P3SD4 - Punch 8", I looked on the factory site and it does exactly what I want in a .25cf box. Ive been told people even use them in their doors. I dont want to buy anything until I have heard from someone who actually has experience separating frequencies between low and mid-bass setups

 

[The Camry]

Look at stereo integrity tm65s. Excellent midbass and low extension. Its your box if you dont have anything about 40hz.

Honestly sounds like cancellation between midbass and sub freq to me. Try flipping your sub polarity.

Sent from my SGH-T999 using Tapatalk

 

[Massive spl]

I dont want those people to help me. I want them to go sober up and stop typing on the internets //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif
If my woofer doesnt play above 40hz, its because I have specifically built the box to be tuned at 35hz for best efficiency, and filtered out all other frequencies above that. I will tune 2 smaller sealed enclosures to deliver the range between 40-100hz, and hang them right inside the cabin on each side of the rear window.

If you have 4 18s, why do you need 2 10s? Maybe your box or amp tuning is such a problem that your 18s can produce enough sound?

Wow clueless^ 10s in my doors are crossfire at 180hz... They are for vocals I don't use them for midbass. Everyone that hears my truck says it's the cleanest sounding loud vehicle. While my woofers play well up to 80hz and farther no problem at all. im tuned at 30hz. Has no problem playing past 40hz lmao.