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Need Help!!! Wiring amp, sub, to headunit - custom setup - Page 3

post #61 of 92
Thread Starter 
Quote:
Originally Posted by cubdenno View Post

Not sure I understand the problem. What does sub and the front speakers have to do with the front speakers?
You wire the sub the same way we told you initially.
Just use the built in crossovers to keep each speaker type with the correct bandwidth.

Sorry im confusing myself. I am sticking with the speakers I have now and just adding the amp.
post #62 of 92
Thread Starter 
Hey so i have everything run correctly and its all working. I just need to tune the amp gains, filters, etc. Can someone tell how to exactly set that up? I dont have a multimeter. Is it possible to do it by ear decently? Everything i've found shows subwoofers.
post #63 of 92
1. Play a typically loud music CD in your headunit. Set volume to 75%. Wear ear protection.
2. Starting with the amp gains at their lowest setting, slowly raise one gain at a time until you hear clipping from the corresponding speaker. This will sound like audible distortion.
3. Once you've found the clipping point, back the gain down until you no longer hear the distortion.
4. Repeat for any addt'l gains on the amp/amps.
5. Your new maximum volume setting on the headunit is 75%, never exceed that for happy, healthy speaker life.
post #64 of 92
To further expand on TundrSQ's advice, make sure all boost is off. Loudness is off, bass and treble set to zero at the head unit. Any head unit EQ is off or set to neutral. Remember, the gain does not make your amp produce more power. It is there to let you match the amp to the headunit. Your headunit is what dictates the amp producing up to it's max power. all controlled by the volume control and whatever boost you add.
post #65 of 92
Thread Starter 
Thanks! Would i be better off tuning at a specific hertz? Just saw something online about it and not sure if thats necessary?
post #66 of 92
Quote:
Originally Posted by nole13 View Post

Thanks! Would i be better off tuning at a specific hertz? Just saw something online about it and not sure if thats necessary?

Not relevant to what you are doing. Tuning to a specific hertz is for sub enclosures that are ported. Or if you are eq'ing your system and are addressing a peak or valley in your vehicles frequency response.
post #67 of 92
Thread Starter 
Okay. Just going off my speakers what should my set the crossovers to on the amp? Do i want to completely eliminate the bass from my front speakers since they do have woofers?

[SIZE]Speakers[/SIZE]

http://www.polkaudio.com/products/db461

http://www.polkaudio.com/products/db690

[SIZE]Amplifier[/SIZE]

http://www.rockfordfosgate.com/products/product_details.aspx?itemid=233188
post #68 of 92
Set it for HP which is 80 hertz. The low pass has a select-able frequency pot.
post #69 of 92
Thread Starter 
This might be a dumb idea which is why im asking before doing it. Can i bridge my two rear channels and combine the speaker wire from the two 6X9s to get 22.5 more rms? Will this hurt the amp? Am I better off just running it individually and only sending 40 rms?
post #70 of 92
Don't do it.

You are basically driving the 6X9's with a mono signal at a to low for that amp impedance. You might gain a bit more output but in the end the magic smoke may come out of the amp.

What are you trying to gain? More bass?

How did you end up wiring the speakers to the amp?

Did you add the sub yet?
post #71 of 92
Thread Starter 
i ran speaker wire from the head unit instead of opening each door panel to the trunk and then each speaker is on its on channel. Although when I adjusted the gain today it sounds like i have a left and a right, not front and rear. I haven't added the sub yet. Look to pick up one of these and then just use the rear speakers as fill and bridge the two rear channels for the sub, but since it sounds like i have a left and right don't know if that will work. Also quick question, on my head unit it has the option to but the sub in rev or normal. And I can adjust the subwoofer level from the headunit. Is that the gain?

http://www.bestbuy.com/site/olstemplatemapper.jsp?id=pcat17080&type=page&qp=cabcat0300000%23%230%23%231qo~~cabcat0302000%23%230%23%23ds~~cabcat0302034%23%230%23%233z~~cpcmcat223300050038%23%230%23%231~~q4661737433736b753232~~nf398%7C%7C506f6c6b20417564696f&list=y&nrp=15&sc=carSP&sp=-bestsellingsort+skuid&usc=abcat0300000
post #72 of 92
Did you use y connectors to split the rca's signal for the front and rear?

Disconnect the rear speakers to make sure the front are working. Reconnect the rears after making sure. Repeat with the other set.

Confirm that both sets of speakers work.
post #73 of 92
Thread Starter 
Quote:
Originally Posted by cubdenno View Post

Did you use y connectors to split the rca's signal for the front and rear?
Disconnect the rear speakers to make sure the front are working. Reconnect the rears after making sure. Repeat with the other set.
Confirm that both sets of speakers work.

Should I disconnect the y-adapters or the actual speaker wires?
post #74 of 92
Thread Starter 
Hey so I ended up buying the Boston Acoustics GP110PS. I was going to just run the front speakers off channel 1 and 2 and then bridge the two rear speakers for the sub. I wanted to know is there anyway to run all four speakers off the front two channels?
post #75 of 92
Just hook the second set to the same amp terminals as the front set
post #76 of 92
Thread Starter 
Quote:
Originally Posted by cubdenno View Post

Just hook the second set to the same amp terminals as the front set

Wouldn't that reduce rms power to 20? Which would basically be the same as the head unit? Anyway to run them at 2 ohm?
post #77 of 92
Your amp does 65@2 ohms so its not a perfect doubling of power at two ohms but the difference would be inaudible. The difference between a head unit and amp of the same power rating is night. And day. The chip the head unit uses will clip long before the amp will. Look at the power requirements between the amp and head unit.

Anyway, you should enjoy the set up. With the sub.
post #78 of 92
Thread Starter 
So im trying to figure out how to open my back seat in order to mount the amp and unclipped the speaker by accident. While putting it back in I noticed a crack in the woofer of my DB690. I was wondering if I run only high frequencies through the speaker will it still sound bad? Or do I just replace it?
post #79 of 92
Thread Starter 
So i'm looking to upgrade due to the sound i want and having some more cash. Can someone please take a look at what i'm upgrading to. The head unit is available for $129, The amps are both around $200 on other sites. Just looking for input.


[SIZE]HeadUnit[/SIZE]

http://www.sonicelectronix.com/item_46317_Sony-MEX-BT4000P.html?SearchClickout%5Bquery_id%5D=13556730&SearchClickout%5BIgnore%5D=1


[SIZE]Amplifiers[/SIZE]

http://www.sonicelectronix.com/item_34760_Rockford-Fosgate-R600-5.html?SearchClickout%5Bquery_id%5D=13556757&SearchClickout%5BIgnore%5D=1

http://www.sonicelectronix.com/item_34363_Alpine-MRX-V60.html?SearchClickout%5Bquery_id%5D=13556768&SearchClickout%5BIgnore%5D=1
post #80 of 92
Quote:
Originally Posted by nole13 View Post

So i'm looking to upgrade due to the sound i want and having some more cash. Can someone please take a look at what i'm upgrading to. The head unit is available for $129, The amps are both around $200 on other sites. Just looking for input.
[SIZE]HeadUnit[/SIZE]
http://www.sonicelectronix.com/item_46317_Sony-MEX-BT4000P.html?SearchClickout%5Bquery_id%5D=13556730&SearchClickout%5BIgnore%5D=1
[SIZE]Amplifiers[/SIZE]
http://www.sonicelectronix.com/item_34760_Rockford-Fosgate-R600-5.html?SearchClickout%5Bquery_id%5D=13556757&SearchClickout%5BIgnore%5D=1
http://www.sonicelectronix.com/item_34363_Alpine-MRX-V60.html?SearchClickout%5Bquery_id%5D=13556768&SearchClickout%5BIgnore%5D=1

i lost track of this about 50 posts ago...remind everyone what you would be upgrading FROM.....and explain a little as to what you are hoping to gain with this purchase. If memory serves you have a relatively low end HU and rockford amp...and here it seems you are looking to buy another entry level HU and amp???
post #81 of 92
Thread Starter 
Quote:
Originally Posted by tundrSQ View Post

i lost track of this about 50 posts ago...remind everyone what you would be upgrading FROM.....and explain a little as to what you are hoping to gain with this purchase. If memory serves you have a relatively low end HU and rockford amp...and here it seems you are looking to buy another entry level HU and amp???

Upgrading from

http://www.sonicelectronix.com/item_40305_Sony-CDX-GT260MP.html?SearchClickout%5Bquery_id%5D=13558782&SearchClickout%5BIgnore%5D=1

Reason for the upgrade is that I will now have pre-amp outputs for rear and sub as well. As well as add usb, bluetooth, and xm radio capability.

http://www.rockfordfosgate.com/products/product_details.aspx?itemid=233188

Upgrading amp in order to take advantage of the new outputs as well as be able to power each channel individually, all speakers, and power the sub. D

Does that not seem worthwhile?

With the current setup it sounds good, but i lack the bass. And I also lost my fading capability which leaves the rear speakers overpowering the front.

Do you think that it is better to just leave the system where it is now and power the front speakers with amp as well as the sub with the bridge rear channels and then run the rear speakers off the head unit?
post #82 of 92
have you considered keeping your current amp, and adding a mono subwoofer amp?


and sure the HU upgrade sounds fine if it will give you all the outputs you need. But keep in mind, you dont need fading capability...you need level setting capability.

So instead of upgrading, if you add a mono amp instead....and then power your front and rear speakers off the 4 channel current amp...you can balance the levels with your amp.

and if the current amp or new mono amp has and RCA pass thru ...you can pass thru the signal to the new mono amp and be done.

so instead of replacing 2 things...you just add one...and you get more flexibility down the road to change out one or the other amps depending on your needs.
post #83 of 92
Thread Starter 
Quote:
Originally Posted by tundrSQ View Post

have you considered keeping your current amp, and adding a mono subwoofer amp?
and sure the HU upgrade sounds fine if it will give you all the outputs you need. But keep in mind, you dont need fading capability...you need level setting capability.
So instead of upgrading, if you add a mono amp instead....and then power your front and rear speakers off the 4 channel current amp...you can balance the levels with your amp.
and if the current amp or new mono amp has and RCA pass thru ...you can pass thru the signal to the new mono amp and be done.
so instead of replacing 2 things...you just add one...and you get more flexibility down the road to change out one or the other amps depending on your needs.

Don't have a pass thru on the current amp. Do you have a mono amp you recommend that will work well for my setup? Keeping the current head unit? Also can you follow up on my question about the cracked 6x9?
post #84 of 92
Quote:
Originally Posted by nole13 View Post

Don't have a pass thru on the current amp. Do you have a mono amp you recommend that will work well for my setup? Keeping the current head unit? Also can you follow up on my question about the cracked 6x9?

i use this one:

http://www.sonicelectronix.com/item_19556_Rockford-Fosgate-Punch-P500-1BD.html

and as for the 6x9...hard to say...if it is a clean crack and you are able to stabilize it with screws you should be fine for both lo and high freq. i would want to screw it to a solid wood or phenolic baffle...not to the car door which wont be flat.
post #85 of 92
Thread Starter 
Just got the BA sub in the mail, waiting to test it out. Does anyone have a wiring diagram to show how to wire the four speakers (4 ohm) to present a 2 ohm load on the front two channels and then I can bridge the rear channels for the sub.
post #86 of 92
It's called parallel wiring. Just wire both sets of speakers to the front two channels. Each speaker is a four ohm load. Parallel wiring makes the amplifier "see" a two ohm load on those two channels.

So you have two amplifier outputs. On the front two channels. You use one for the left and one for the right speakers.

There is a positive and a negative for each pair. Just wire each left speaker (front and rear) to the front left channel on the amplifier. Do the same for the right side speakers on the front right amp channel.
post #87 of 92
Thread Starter 
Okay so its all hooked up. It sounds good, but I feel like its still leaning towards the rear and the front speakers are acting as fill. Is there anyway to tune it via the amp so that the rear speakers are faded a little. Or do i have to switch around my set up in order to accomplish that?
post #88 of 92
You can order an l-pad. It's a variable resistor. You would use it on the 6x9's to reduce the output.

Otherwise you could power the 6x9's from the head unit or get a mono amp to drive the sub and power the main speakers with the current amp and use e gain control to level out the interior speakers.
post #89 of 92
Thread Starter 
Will using a mono amp that has an input and line out rca ports allow me to then fade my sound?
post #90 of 92
Quote:
Originally Posted by nole13 View Post

Will using a mono amp that has an input and line out rca ports allow me to then fade my sound?

its "possible" to set something up that would allow you to fade, but it would not be ideal.


However what it WOULD allow you to do is level match the front rear and subwoofer. Which in my p[inion is 10 time more important than being able to fade.
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