The time is rapidly approaching........Sub options please....

1996blackmax

brettw22 wrote:

I'm gonna be bashing my head against the wall with trying to put a sub and some amps in.......i'm not switching speaker wire at all........lol.

I was not recommending that, just pointing out that Knukonceptz has good products at great prices .

brettw22

exalted512 wrote:

i still say go with dual 4awg runs.

the reason why you wouldnt have sub controls is because its not hooked up to the sub output.
-Cody

Both of the existing outs are for a sub (since the unit it switched to the STD position)......so ultimately as long as there is at least one cable running to the amps, then it would be able to be controlled by the deck.........right?

1996blackmax

As you know, with music there will be a wide variation in bass content. By running a dedicated subwoofer RCA cable you can control it independently from the rest of the system (the main speakers). This is simply done by adjusting the subwoofer level up or down from the HU itself.

brettw22

Maybe I'm not making sense........(i'm only trying to understand, not wanting to run a single cable)......

If both outputs are for sub outs, how can the deck say if you use one out and not both (splitter to both amps), you don't get to use the controls? What does the deck care if you use one or two different cables? With the deck switched to the STD config, both of the outs (as the third pair) are config'd to be sub output........

1996blackmax

I see what you are saying. You want to plug in only one side correct?

Why do you want to use a splitter when you do not have too? You have a HU that has high volt preouts. This is good for several reasons. If you start splitting the same lines, you are just watering down the preout voltage, and not getting the benefits of what you paid for.

If you use all of the preouts, you will have alot more control of your system. You can tweek till your blue in the face from the driver's seat. The other way you would lose this.

1996blackmax

Let me get this straight. You have a HU that has 3 sets of preouts. You have a four channel amp. You want to add a subwoofer amp. Is this correct? Then you should be running 3 sets of RCA's to the amps. Two to the 4ch. and 1 set to the sub amp.

brettw22

I get the reasons why and I understand that it's best for me to run the 2 interconnects (1 to each amp) and yes that's how I'm going to do it........

I just don't see why one way vs. the other is going to make you not able to use your HU to control the subs as was stated earlier.

howie777

As long as you only use the sub preout on the HU you can control both subs via the HU. So its either a Y-spliter or daisy chain the amps (probably the best way). By Daisy chain I mean, from HU sub preout to amp 1 input, from amp 1 preout to amp2 input.

The only way you couldn't use the HU controls for both amps, is if you connect one or both amps to the non sub preout on the HU. In which case, the amp(s) not connected to the sub preout on the HU will not respond to the sub controls on the HU

H

1996blackmax

brettw22 wrote:

I get the reasons why and I understand that it's best for me to run the 2 interconnects (1 to each amp) and yes that's how I'm going to do it........

I just don't see why one way vs. the other is going to make you not able to use your HU to control the subs as was stated earlier.

If you were going to use a splitter and used the sub output, you would control the output of the subs. At the same time though it would also control the output of you mids and highs. This would defeat the whole purpose of the sub control through the HU.

If you were going to use either the front or rear outputs on the HU, and split them to the amps, you would not be able to adjust the volume of the sub.

You basically want the sub to have its own RCA from the HU so that you can control its output.

I would advice you to actually use 3 set of RCA's. One set for the front, one for set the rear, and one set for the sub. This will allow you to have alot of control through you HU. This is especially true when it comes to setting the levels, as well as the time alignment features on the HU. That HU has very stong preouts, no reason not to use them.

1996blackmax

howie777 wrote:

As long as you only use the sub preout on the HU you can control both subs via the HU. So its either a Y-spliter or daisy chain the amps (probably the best way). By Daisy chain I mean, from HU sub preout to amp 1 input, from amp 1 preout to amp2 input.

The only way you couldn't use the HU controls for both amps, is if you connect one or both amps to the non sub preout on the HU. In which case, the amp(s) not connected to the sub preout on the HU will not respond to the sub controls on the HU

H

He has three sets of preouts on his HU, no need to use splitters or to daisy chain anything......

MacLeod

Yes but he's wanting to run 2 amps, one for each sub. For that he would need to run one of the sub outputs to each amp and use a Y splitter from there.

1996blackmax

I missed that.... my apologies brett. Splitter or pass through would work.

brettw22

excellent.........now i'm totally confused

I have 2 available sub outs from my HU. The plan has been to run an interconnect (total of 2) to each of the amps. That would make a total of 3 pairs of interconncts for all systems (one pair for front, one pair for back, and one pair for the 2 subs/amps). Now you guys are saying that I should add a splitter in there somewhere. Why?

MacLeod

No. You have 2 sub outputs from your head unit, a left and a right. You run one of them to one amp but because your amp will have 2 inputs and youre only using one RCA, youll usa a Y splitter to connect that one RCA to the 2 inputs. Then you run the other RCA to the other amp and use a Y splitter there too.

This way you can still fade your subs output and youll only need one pair of RCA's and 2 Y splitters.

1996blackmax

Yes a splitter so that you can have a set of interconnects going to each sub amp. You could also just get another set of RCA's and connect this set from the output of sub amp one and hook it up to the output of sub amp two. This was what Howie was correctly stating, and me being a nuckle head and not reading through everything, gave misleading info.

exalted512

Ok...

You have a front, rear, and sub output, correct?

For one, if you have the RCA on the radio going to the sub and SR6500 amplifiers, not only will you get any sound above 200Hz(because its lowpassed), everytime you go up or down on the attenuation, it will make both the subs and sr6500s go up or down respectively.

If you have the sub hooked up to the sub rca and the SR6500s hooked up to the front, everytime you mess with the sub dial on your radio, the radio only sends the change you made through the sub rca.

Do you understand now why splitting a single RCA running both fullrange and sub would be a bad idea?

What Aaron is saying is that if you have 2 SUBWOOFER amps, and only one SUBWOOFER pre out on the back of the radio, then when you get to the amplifiers, youll have to y-split the single rca coming out the single preout on the radio to make two RCAs going to each individual sub amp.
-Cody

brettw22

I guess HT sub plate amps having a single RCA LFE input is what's thrown me.....I just assumed that most if not all amps could use a single RCA input. I haven't ever implied that I was running an interconnect from the HU's front or rear channels to the sub amps, so I don't know how the signal would be jumping from the sub rca's.

I have a total of 3 pair of rca outputs, and 2 pair of those are running to the 400.4 that is running both pair of the SR6500's......that means that I have a single pair of RCA jacks to split to two 500.1's (each of which will be running at SR12DVC sub). If I understand correctly now....(hope the **** so)......I will be running an interconnect into a splitter from the HU to each of the 500.1's.

Please tell me that's right..........i want to order this stuff asap....

1996blackmax

You are correct Sir, and thank you for making me laugh with that little bit of hoping .

brettw22

Probably just something else to wrap my head around, but why the **** is there a left and a right with a sub?

1996blackmax

I have actually thought about that myself.....

brettw22

And it's a definite requirement to have 2 RCA's going into each of the amps? (no such thing as a single LFE input similar to HT Sub Amp plates on subs?)

exalted512

Some monoblocks only need one, some need 2. I think the reasoning behind it all it 1.) Some people use 2-channel amps to power their subs, which means you need 2 rca jacks on the back of the radio and 2.) It would confuse people as to why they only need 1/2 the RCA because a lot of people dont grasp the fact that it is a mono signal

BTW, the memphis belle only has a single rca input for its sub channel
-Cody

brettw22

Ok......so I've got that I'm going to be running a new 1/0 gauge wire, interconnects, splitters, but now I'm onto remote on wires. I know where they connect on the amp, but where is the other end of that thing coming from?

Is there anything else that I'm missing about hooking all this stuff up?

1996blackmax

The back of your HU.

brettw22

How much room can there be on the back of that thing to connect 3 remote on wires to?

1996blackmax

Run one wire to the back and then wire two other wires to it. With mine I have it going to one amp, and then piggy backing off that connection to the other amp.

brettw22

So rather than do a homerun from the deck for each of the additional 2 amps, jumper from the already installed 400.4 over to one of the 500.1's, then jumped from there to the second 500.1.

1996blackmax

That is what I have done, and what I would do.

deepinya

Too many cooks in the kitchen!

*scratches head*

1996blackmax

Well, at least the food will get done quicker............