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how to run a car sub in house - Page 2

post #31 of 83
5/3/09 at 8:53pm
Thread Starter 

Re: how to run a car sub in house

i am really sorry for the all the questions but where do i plug the radioshack cable into the amp and where do the speaker cables go from the amp to the sub. a diagram of everything would be greatly apprecciated. this should be won of my last questions i will post pics when i get it all if my parents let which i am 95 percent sure.
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post #32 of 83
5/4/09 at 7:52am

Re: how to run a car sub in house

The EP-4000 is just an EP-2500 in a new package. Power is the same. If you want more power you are looking at $1,000 and up for a Crown, QSC, Carvin or Face Audio amp.

Look at the EP-2500 owner's manual, page 5, Figure 2.2 - Rear panel control elements. The 1/4" mono plug goes into Input 1 which is labeled as #8 in that diagram. The speaker connections for input 1 are labeled as #12 in the same diagram.

You have ignored one of my questions and there will be no more help until you answer it - Why JL and specifically why the W7?
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post #33 of 83
5/4/09 at 2:31pm
Thread Starter 

Re: how to run a car sub in house

I want a w7 because I like the looks and the sound quality and it still gets kind of loud. I know they r overprised and there is better valued subs. Sorry I didn't respond to your questions I didn't see them because they were always at the bottom of your posts. I am pretty sure the so-4000 puts out more watss though
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post #34 of 83
5/4/09 at 6:40pm
Thread Starter 

Re: how to run a car sub in house

are u sure that is the right cable from radioshack because i need a subwoofer pre out on one end [what is the technical name?] and a trs 1/4 inch input on the other end. the radioshack cable is labeled 1/4 plug to rca jack shouldnt it be called subwoofer preout to trs jack. also the one end of the plug looks huge and the other end doesnt look like it would fit into anything i could be wrong but just my 2 cents
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post #35 of 83
5/5/09 at 5:05am
Thread Starter 

Re: how to run a car sub in house

the 1/4 inch plug looks like that should maybe go into the amp and the other end looks like it would work if it was a male end
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post #36 of 83
5/5/09 at 5:45am

Re: how to run a car sub in house

Quote:
Originally Posted by jordan572
are u sure that is the right cable from radioshack
Yes.

Quote:
Originally Posted by jordan572
i need a subwoofer pre out on one end [what is the technical name?]
The technical name is RCA plug.

Quote:
Originally Posted by jordan572
a trs 1/4 inch input on the other end.
1/4" plug is on the other end.

Quote:
Originally Posted by jordan572
shouldnt it be called subwoofer preout to trs jack.
No. The cable is named appropriately. Radio Shack is nice enough to have a picture for confirmation.

Quote:
Originally Posted by jordan572
i could be wrong
You are.

Quote:
Originally Posted by jordan572
I want a w7 because I like the looks and the sound quality and it still gets kind of loud.
Unless you have a plexiglass window in your enclosure, the back end doesn't matter. It's not like you can invert mount it like you can regular subs. Please take the time to learn about what makes a speaker good and ignore the marketing and the labels.

Quote:
Originally Posted by jordan572
I am pretty sure the so-4000 puts out more watss though
You need to learn to read the specs.

EP4000
Page 12 - http://www.behringerdownload.de/EP20...8_M_Web_EN.pdf
RMS, 1% THD, both channels driven, bridge mode - 2400 watts. Peak; 4000 watts

EP2500
Page 11 - http://www.behringerdownload.de/EP15...1-25_Rev.6.pdf
RMS, 1% THD, 1Khz, both channels driven, bridge mode - 2400 watts. Peak; not advertised.

Both amplifiers weight 36.6 pounds. The only way to put out more power it to put in a much larger transformer which would impact the weight of the more powerful amp.

-Robert
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post #37 of 83
5/5/09 at 1:14pm

Re: how to run a car sub in house

This is how I would do it.

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post #38 of 83
5/5/09 at 2:31pm

Re: how to run a car sub in house

Quote:
Originally Posted by chuckg
This is how I would do it.
All of my hard work down the drain!

-Robert
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post #39 of 83
5/5/09 at 2:41pm
Thread Starter 

Re: how to run a car sub in house

yeah thanks for the great help went from knowing nothing to knowing what to buy and hook up and how to wire it too. i havent ran across a person this helpful on the internet ever!!! i thought i was going to have to buy a converter and a car amp but i dont need to just one more question how long would the europower last on 1.5 ohms before i had to turn it off due to overheating. and i f i did run it on 1.5 ohms and shut it down before it overheated would it hurt the life of the amp. how would i be able to tell if it was overheatin
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post #40 of 83
5/5/09 at 3:31pm

Re: how to run a car sub in house

I run my EP-2500 at 2 ohms stereo into a pair of 15's. The fan has been modified to use a low flow, quiet model. I also reversed it so it pulls air from the front of the amp to the rear. The factory one is a little annoying in a quiet room at low volumes.

With three cats in the house, the air filter on the amp will get dirty. I forgot to vacuum it a few times and it really cut down the air flow. During loud viewing the amp would just shut down for 10 or 20 minutes at a time. After 3 or 4 times, I went over and touched it. I could have fried an egg on the top of it. I vacuumed it clean and now it runs barely warm to the touch during normal listening. When my wife cranks her Motley Crue DVD, it gets really warm but not hot.

I don't recommend it but you can try running each coil to each speaker output. I don't recommend it but it will probably work without problems if you keep the factory fan. I don't recommend it but it will probably work as long as you don't crank the Crue like my wife does. Did I mention that I don't recommend it and shouldn't be held responsible if your amp blows?

Finally, you will have to set the DIP switches on the amp to turn off the high pass crossover. But we can visit that when you hook everything up.

Quote:
Originally Posted by jordan572
yeah thanks for the great help went from knowing nothing to knowing what to buy and hook up and how to wire it too. i havent ran across a person this helpful on the internet ever!!!
Thank you but 99.9% of this forum is just as helpful as me. I've been to car audio forums where it is nothing but insults and that isn't me. And a word of advice - pay attention in your English classes. If you want to be taken seriously, you have to project a serious image. Whether that is in person or on the web. I'm certainly not perfect and I let my writing slide when I e-mail friends, but here in public I try to put my business communication classes to good use.

I'm also learning every day as well. After researching for a couple of years, last year I built my own sub from scratch. Well as scratch as you can without owning a magnetizer. slideshow

-Robert
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post #41 of 83
5/5/09 at 4:45pm
Thread Starter 

Re: how to run a car sub in house

yeah i seen the slide show u had going that sub is pretty cool i liked your ar-15 those are really cool
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post #42 of 83
5/5/09 at 4:47pm
Thread Starter 

Re: how to run a car sub in house

how would i run it on two channel's
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post #43 of 83
5/6/09 at 8:23am

Re: how to run a car sub in house

Quote:
Originally Posted by jordan572
how would i run it on two channel's
Simple. Split your LFE output with a "Y" adapter from Radio Shack. It needs to have an RCA plug on one end and two RCA jacks on the other. Then you would need a second RCA to 1/4" mono plug that I mentioned earlier. Wire each speaker output to each voice coil terminal.

-Robert
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post #44 of 83
5/6/09 at 6:21pm
Thread Starter 

Re: how to run a car sub in house

so what cables would i need to run it at 1.5 ohms [and i could still run it a three ohms but i would run off one channal then] i need this to run it off the ipod i dont think u need a dock but i have one already then i need a y adapter but couldnt find the cables you were talking about or the y adapter.

Jensen ME - 6' Stereo Audio Cable - JP3106
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post #45 of 83
5/7/09 at 6:02am

Re: how to run a car sub in house

Quote:
Originally Posted by jordan572
so what cables would i need to run it at 1.5 ohms
Take this cable and plug it into the Onkyo's LFE output. Now instead of having one RCA jack, you have two. Get two of these and plug them into each of the Y cable's jacks. Each of the 1/4" plugs go into each input of the amp. Using speaker wire connect each speaker output to each voice coil of the sub.

Quote:
Originally Posted by jordan572
[and i could still run it a three ohms but i would run off one channal then]
That is correct.

Quote:
Originally Posted by jordan572
i need this to run it off the ipod i dont think u need a dock but i have one already then i need a y adapter but couldnt find the cables you were talking about or the y adapter.

Jensen ME - 6' Stereo Audio Cable - JP3106
That cable will plug into the line output of your docking station. Then plug the two RCA ends into the CD input of your Onkyo.

Depending on the speakers that you have and the quality of the music on your iPod, it may or may not sound good. In the car or with headphones, my compressed music sounds fine. When I play it on my home system it sounds like compressed music. I'd much rather listen to the full CD quality. My music is ripped at 320kpbs in WMA format. I've heard the iTunes songs that are 92kpbs and 128kbps and they sound like crap to me in both the car and home.

-Robert
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post #46 of 83
5/8/09 at 9:05am

Re: how to run a car sub in house

I vote Robert for Sainthood!!!
You are a gentleman and a SW scholar and your kindness is only exceeded by your patience.
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post #47 of 83
5/9/09 at 8:28am
Thread Starter 

Re: how to run a car sub in house

so the ep 4000 claims 2000 watts at 2 ohms off two channals could i run it off two channal but then wire the sub like thishttp://akamaipix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/1DVC_2-ohm_mono.jpg


i know how to wire everything except how to run the wire off two channals to the box and then from the box to the sub? last diagram would be appreciated
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post #48 of 83
5/9/09 at 8:42am
Thread Starter 

Re: how to run a car sub in house

o and if i were to wire the sub off one channal then the sub would be at 3 ohms but if i wired it off two channnal then the sub would be at 1.5 ohms
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post #49 of 83
5/9/09 at 4:35pm

Re: how to run a car sub in house

Quote:
Originally Posted by jordan572
so the ep 4000 claims 2000 watts at 2 ohms off two channals
But in reality it does about 800w/channel @ 2 ohms @ 20 hz. Those ratings you see in the owner's manual are taken at 1,000hz which is a much easier frequency to drive.

Quote:
Originally Posted by jordan572
could i run it off two channal but then wire the sub like this
Look at the attached pic for a diagram of wiring each voice coil to each channel.

Quote:
Originally Posted by jordan572
o and if i were to wire the sub off one channal then the sub would be at 3 ohms but if i wired it off two channnal then the sub would be at 1.5 ohms
1.5 ohms per channel.

-Robert
525x525px-LL-vbattach1417.jpg
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post #50 of 83
5/10/09 at 5:53pm
Thread Starter 

Re: how to run a car sub in house

i see how to wire that but i have to wire to the outside of the box first because the sub is in the inside of the box. the box only have a positive and negative hook up for one wire each unless i can fit two wires per terminal on the box.
also how would i get 800 watts off two channels. i see specs that say 2000 watts a t 2 ohms of 2 channals? and if i run my subb off one channal how many watts would i have? is there a page where you get your specs from? is there a tool that i could use to measure the watts?thanks
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post #51 of 83
5/10/09 at 6:57pm
Thread Starter 

Re: how to run a car sub in house

o do u think those radioshack wires will affect the soun quality because isnt radioshack wires not the greatest quality
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post #52 of 83
5/11/09 at 9:53am

Re: how to run a car sub in house

I get my specs from another forum where they have run independent tests on a number of amps. They used a bank of watercooled resistors to provide either a 4 ohm or 2 ohm load. Voltage meters, spectrum analyzers, test tone generators, etc were all used to determine how much power these amp put out in a home theater environment.

I'm not following your question on the use of terminals. You would need a pair of terminals (2 positives and 2 negatives) if you wanted to wire the driver up to a stereo amp.

If I thought those Radio Shack cables were an inferior product I wouldn't use them.

-Robert
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post #53 of 83
5/11/09 at 1:15pm
Thread Starter 

Re: how to run a car sub in house

ho would i wire four wires to this hook up? i would have 2 positive and 2 negative wires if i was running off two channal right. then inside the box i would have 2 positive and 2 negative wires. i would run the positve and negative off one channal of the amp to one voice coil on the sub and the other positive and negative wires off the other channal to the other voice coil. i get how you just run the wires off the amp to the sub like the picture you showed me but the box is in the way thanks
http://dynamicautosound.net/ebayimg/...12RGW7SIDE.jpg

picture of terminals on my box
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post #54 of 83
5/11/09 at 1:34pm
Thread Starter 

Re: how to run a car sub in house

how many watts would this run off one channal at 1.5 ohms and off 2 channals at 2 ohms or you could give me a link to your forum where you find these specs
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post #55 of 83
5/11/09 at 2:33pm
Thread Starter 

Re: how to run a car sub in house

i ment 1.5 ohms not 2
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post #56 of 83
5/11/09 at 3:36pm

Re: how to run a car sub in house

Quote:
Originally Posted by jordan572
ho would i wire four wires to this hook up? i would have 2 positive and 2 negative wires if i was running off two channal right. then inside the box i would have 2 positive and 2 negative wires. i would run the positve and negative off one channal of the amp to one voice coil on the sub and the other positive and negative wires off the other channal to the other voice coil. i get how you just run the wires off the amp to the sub like the picture you showed me but the box is in the way thanks
http://dynamicautosound.net/ebayimg/...12RGW7SIDE.jpg
picture of terminals on my box
I thought you were building the box. If you were, you would use a termnal cup like this - Parts-Express.com:Gold Plated Bi-Amp Terminal | SPEAKER TERMINALS speaker terminal speaker plate speaker mounts speaker mount plates plate amp plate mounts mount binding amps amp

You either add a second set of terminals to the box or you wire your sub in series and run the amp in bridged mode.

Quote:
Originally Posted by jordan572
how many watts would this run off one channal at 1.5 ohms and off 2 channals at 2 ohms or you could give me a link to your forum where you find these specs
You need to learn that watts are the be all, end off of a sub system. That's like bragging how much gas your muscle car uses. That amp will more than adequately power your sub.

The forum is AVS Forum. It's not a beginner site. You have guys building subs like this. That do it yourself enclosure has pair of 15" subs in it. And subs like this. Each driver you see is 18" diameter. On that side of the box there is an active driver in the middle with passives above and below. On the side of the box you don't see, there is also another active driver and a pair of passives. And then there is an identical box on the other side of the room. This guy took over a year to build these.

-Robert
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post #57 of 83
5/11/09 at 8:28pm
Thread Starter 

Re: how to run a car sub in house

could i just run 2 wires to the positive and two wires to the negative hook ups outside the box and then inside the box just run a positive and negative to each voice coil? or couldnt i fit 2wo cords in one terminal. could i buy that plate at radioshack and install it myself? thanks a lot again it is like never ending questions with my stupidity
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post #58 of 83
5/12/09 at 5:53am

Re: how to run a car sub in house

Quote:
Originally Posted by jordan572
could i just run 2 wires to the positive and two wires to the negative hook ups outside the box and then inside the box just run a positive and negative to each voice coil?
Yes.

Quote:
Originally Posted by jordan572
couldnt i fit 2wo cords in one terminal.
A single terminal like the one pictured on your box? No.

Quote:
Originally Posted by jordan572
could i buy that plate at radioshack and install it myself?
The search function at Radio Shack is available to you the same as me.

Quote:
Originally Posted by jordan572
thanks a lot again it is like never ending questions with my stupidity
These aren't stupid questions but you aren't do any research yourself. Spoon feeding you this information does not help you learn it. When I started this hobby I didn't have the resources that you do. All I ask is that you do a little reading before asking your questions.

-Robert
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post #59 of 83
5/12/09 at 1:15pm
Thread Starter 

Re: how to run a car sub in house

i looked at radioshack before and i knew they had a hook up but i didnt know if i could install it. also you said off one channal the amp but off 800 watts at two ohms and 600 wattts at 3 ohms so at 1.5 ohms itwould but out around 900 watts off one channal how about 2 channals at 1.5 ohms i am just trying to figure out if it is worth buying new terminals and installing new hardware to run it off two channals. would running it off two channals be hard on the sub?
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post #60 of 83
5/12/09 at 7:04pm

Re: how to run a car sub in house

Wiring the sub as 3 ohm/amp in bridged mode and wiring each channel of the amp to each voice coil is electrically the exact same thing. Hard one the sub? No. It doesn't care. Hard on the amp? Absolutely. As I have stated before, the amp is not designed to drive that load.

The amp produces about 800w/channel into 2 ohms at 20 hz. It does about 1,500w bridged into 4 ohms at 20 hz. It isn't exactly the same but it is close enough. I really don't know how it will react into 3 ohms bridged or 1.5 ohms stereo. It is not rated to drive those loads. Keeping it cool and using the stock fan will probably help. Push it hard and it will shut down. Keep shutting it down and it will probably burn up.

There are so many better subs on the market for less money. This one is just difficult to use with a home amp.

-Robert
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