no where near happy...help

[93civEJ1 10+ year member]

I have 1 older 10" sub hooked up on a cheap amp (bridged at 4 ohm) that is currently set to run at 150rms (on dmm on max 3/4 HU volume on 50hz wave) and even at my normal listening level , the sub just is not cutting it. I can barely hear / feel the thing. When I first had this sub in another vehicle in the same box, it used to be fine. But that was before I knew how to measure volts with a DMM and would just turn up the gain etc to whatever I felt like.

It is in a sealed truck box with 1 other 10" that has a frozen cone and is unhooked.

Would it be best for me to build another box for this sub to get the bass I am looking for? maybe a ported one? or should I look for a speaker that puts out more power? or could it be the crappy cheap amp? (even though with a DMM it says its putting out plenty of power).

If I look for new options, I am eyeing maybe a sundown SA-8 due to the space I have in the truck and mounting depths. What do you guys think I should do? Or is there a way I can take the current speaker I have (its an old Polk EXII 10"...150rms) and make it sound good with bass? Not looking for earth shattering, but def more than it feeling like just what a door speaker feels like.

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[bubbagumper6 5,000+ posts]

Old sub, cheap amp, oversized box with nonworking speaker adjacent and you don't understand why your not satisfied?

If I were you I would just trash it all and start new. You're definitely on the right track looking at an SA-8.

 

[93civEJ1 10+ year member]

yeah...i always like to try to use what I have available first if possible. I just dont remember this sub being barely audible at all back in the day.

 

[Louisiana_CRX 5,000+ posts]

you may of accidently wired the voice coils out of phase

 

[Pborcich 10+ year member]

sounds like it was overpowered... blew 1 sub and possibly a coil on the other?

 

[93civEJ1 10+ year member]

is there a way I can test the coil issue??

 

[IonRL205 10+ year member]

Put a dmm to the positive/negative terminals and set it to ohms and see what it reads. Should read fairly close to what ohms the speaker is.

 

[93civEJ1 10+ year member]

I will do that later this afternoon.

I went out and measured the box it is in...it is totalled up to 1.26 cu ft. For each sub the specs say to use .65 cu ft per sub for a sealed box. The reason it is at 1.26 cu is because the box has 2 subs on it. (one of which that is frozen)....so with a box that big could that be some of the issue? the subs call for 1 cu ft on a vented enclosure.

 

[93civEJ1 10+ year member]

I will do that later this afternoon.

I went out and measured the box it is in...it is totalled up to 1.26 cu ft. For each sub the specs say to use .65 cu ft per sub for a sealed box. The reason it is at 1.26 cu is because the box has 2 subs on it. (one of which that is frozen)....so with a box that big could that be some of the issue? the subs call for 1 cu ft on a vented enclosure.

 

[infamous_e46 5,000+ posts]

//content.invisioncic.com/y282845/emoticons/yumyum.gif.0556df42231b304b9c995aefd13928a8.gif buy my jdm h22a eg9

 

[Fiendstolemyamp 10+ year member]

Did you use a 0db test tone to set the gain? If so you'll never get that much output from music. I'd just set the gain by ear or use a -5db tone.

 

[93civEJ1 10+ year member]

yes used a 0db tone ...50hz to set the gain.

 

[FlexnInLa 10+ year member]

If you can't get everything sorted and you don't have much room I'd look at a ported 10 at minimum. I don't think I could be happy with a single 8 or sealed 10 either.

 

[93civEJ1 10+ year member]

yes I dont have too too much room..thats why I am looking at 8 or 10, but the main concern is mounting depth since it would be a truck box behind the seat. would really like a SA-8 but not sure if it would work due to depth.

 

[bubbagumper6 5,000+ posts]

If you can't get everything sorted and you don't have much room I'd look at a ported 10 at minimum. I don't think I could be happy with a single 8 or sealed 10 either.

*facepalm* way to generalize every single 8" woofer in the world, you obviously haven't seen the new SA-8's....