Jeep Wrangler Forum banner
  • Hey everyone! Enter your ride HERE to be a part of September's Ride of the Month Challenge!
1 - 17 of 17 Posts

·
Registered
Joined
·
26 Posts
Discussion Starter · #1 ·
I have a YJ and I'm very new to subs and amps.
I want to build a sub box for two 6 1/2" subs. Yes, yes I know, 6 1/2" subs aren't cool. But space is a premium in a YJ. I do not want to put subs behind the back seat. I have that stuffed with tools, chains, tow straps, hi-lift jack, etc.
I was thinking of building boxes to go under each front seat or maybe a box that went between the front seats from the floor shifter to back seat.
I've seen some speaker boxes that go on the front of each rear wheelwell just behind the roll bar but those are expensive. I'm retired and have time to build, not money to buy :)

So this brings me to the amp questions. I've seen mono amps and stereo.
Please explain what a mono amp is. I'm thinking it takes a right and left input and sends the combined signal to one or two speakers? Am I close?

I've been reading threads here and it sure seems like cost is no object for a lot of your systems. My pension check doesn't cover my bills very well so cost IS an object with me.
Where can I find the lowest prices and the smallest sub amp? Or is someone here selling a sub amp cheap?
I'm not looking to vibrate the neighborhood or rattle parts off my Jeep. I'm just wanting some bass. I have 4X6 front speakers (might be JVC or Clarion) and Clarion 5 1/4" sound bar speakers. With a JVC head unit. Sounds very clear but no bass. I want some bass but not a vibrator...
Do I make sense?

Thanks.
Danford1
 

·
Registered
Joined
·
3,042 Posts
the small 6.5" subs will put out the same bass as your speakers will, just a bit louder. go with a 8" sub, there is room in a yj to fit a 8" sub. you can also go with a shallow mount sub, these subs are made for small spaces.

as for your question about the mono amp, a mono amp is a single channel amp, that are more used for sub(s).

you will also need to get a wiring kit for an amp, and the size of the wiring depends on how much power you amp is running at.

as for advice on what to get i need to know what your spending limit is.
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #3 ·
Answers

I already have the 6 1/2" woofers and I know someone selling a Jensen JPA-1150W mono amp. It has 150w @4 ohms. My speakers are 4 ohms.
I've been a wood working for decays. I can build a box with two .48 cu foot chambers to fit between the seats like a long console. My thought was down firing the woofers about 1 " from the floor hump in a sealed MDF box.
Do you think a single 8" bazooka tube would be better? I also know of one of those for sale with it's own amp.
Yes I understand anything I install is going to need heavy gauge wire. No problem there.

My budget is $150 since I already have speakers. I could get both the amp and tube for that much...

OH, I also have a new in box Advent 10" sub model AM10 but I think the box would have to be too big for where I want to mount it.

Please give all the advice you can.

Thanks.
Danford1
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #6 ·
Typo

Decays is a typo it was supposed to be decades. Or, been working with wood on and off for 40+ years...

I'm buying both the amp and the Bazooka tube. I can then experiment. Try building boxes etc. I have time... :)

Danford1
 

·
Registered
Joined
·
3,042 Posts
i would say to sell the small subs you have and get an 8" sub, and if your not looking to have a loud sub an 8 running around 175-200watt would do the job.

take a look at this sub, its cheap, doesn't need a big box, its an all around good sub for what you are looking for

here is a youtube vid of it.
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #8 ·
Went with 10" subs

I "bit the bullet" and went with 10" Alpine subs and a Alpine M500 mono sub amp. Crutchfield has a package deal with a box and wiring all for $339.
Yeah, way more than I thought I would spend. Sometimes you just have to realize how short life is. You have to live a little...:D

Danford1
 

·
Registered
Joined
·
3,042 Posts
thats not that bad of a deal. i usually suggest getting a single high power sub to save space but still have the sound of duel subs.
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #10 ·
Seemed like a good deal.

It seemed like a good deal to me. They come tomorrow so I'll be installing them then.
Especially since this is my first venture into subs.
I figure most people , me included, would start smaller and cheaper then later on upgrade to something like this. When you do that, you end up spending more money in the end. Yes, you learn something along the way. This time I figured I would start out with something better and I might not have to upgrade.
I read a lot of good things about the M500 amp and Alpine subs. That made up my mind for me.
My big decision was actually to take the back seat out or leave it in. I decided to take it out and leave it out. Now I'll have room for my gear and the subs. No one rides back there anyway... I won't have to build my custom box either. Instead I'll use that time swapping out my 4x front speakers. Should be a lot of fun in a YJ with factory air hanging from the instrument panel...
I want to buy the Polk DB461P plate speakers.

Cheers.
Danford1
 

·
Registered
Joined
·
3,042 Posts
i kind of see building a system is kind of the same as lifting your jeep, a lot of people go with a small lift and than end up a year of so later end up getting the bigger lift and tires.
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #12 ·
After having the subs for over a month I thought I'd report back.
I've Very happy with the purchase.
I liked it so much I got a sub system for my van. I went with a Atrend single 10" sub box, 10" Infinity reference sub (1060W) and a Sound Ordinance 500w amp.
I picked the Sound Ordinance amp because of the 3 year warranty and it had a separate bass level control I could mount on my console. I first hooked up the amp to the two 10" Alpine subs and Really liked having the remote level control. Since I drive the Jeep more than the van, the Sound Ordinance amp stayed in the Jeep and the Alpine amp went in the van.
The Jeep sounds great. Two 10's and 500 watts are way more than needed. I only have the gain on the amp up about 1/2 way. I can rattle and buzz the poor Jeep easily if I crank up the bass boost control.
I like having the control easy to get to. I find myself changing it as different songs are played.
I very glad I installed the systems in the Jeep and van.

Cheers
Danford1
 

·
Registered
Joined
·
3,042 Posts
How do you know that its running at 500watts ?
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #14 ·
" How do you know that its running at 500watts ? "

I don't . I "assume" it is. (Sound Ordnance M-1500) It is rated at 500 watts RMS @ 2 ohms. I have two 4 ohm speakers in parallel which is a 2 ohm load.
I don't have any meters or accurate way of measuring it.
It is plenty loud and has a lot of thump for an old Jeep.
Even if it is running at half that, it is more than plenty :)

Cheers.
Danford1
 

·
Registered
Joined
·
3,042 Posts
go spend $15 on a basic DMM and tune it right, that way you know that you are not over powering the subs, just because its loud doesn't mean that its not over powered. and it only takes 10 minutes to tune it with a dmm. you would think it would be a pita bu tits not.
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #16 ·
Thank you. I DO have a couple DMM's. What I meant was I don't have any sound pressure meters or anything fancy.
Is there a web site or directions you can point me to that shows how to tune it with a DMM?
Cheers.
Danford1
 

·
Registered
Joined
·
3,042 Posts
^ i just did a full wright up on how it is done. all you need is a calculator a test tone and a dmm
 
1 - 17 of 17 Posts
Top