5 channel aizamp question.

[Kold_Killa 10+ year member]

So I have this Direct 1100d5 laying around that I intend to use...

Rated Power @ 4 ohm: 75 x 4 (ch1-4)

Rated Power @ 4 ohm: 275 x 1 (sub)

Rated Power @ 2 ohm: 125 x 4 (ch1-4)

Rated Power @ 2 ohm: 400 x 1 (sub)

Rated Power @ 1 ohm: N/A (ch1-4)

Rated Power @ 1 ohm: 600 x 1 (sub)

Okay, I'm wondering if it is possible to bridge 2 of the 4 channels to create a 4 ohm load and ~125-150 watts..... Then of course bridge the other 2 and achieve the same thing.

I'm only running a front stage, and it seems kind of silly to leave 2 channels unused, and even MORE silly to not have that added power on my mids and highs.

If it is possible, how are my RCA's to be run?

Scroll to page 12 of this manual:

http://www.directeddealers.com/manuals/og/directed_audio/G1100d5.pdf

It shows 3 channel operation, but says nothing about RCAs, or what load is being achieved... Much help is appreciated, thanks in advance.

Click to read more...

 

[JoeHemi57 10+ year member]

What components are you running? if they are bi-ampable i'd go that route before bridging.

 

[Louisiana_CRX 5,000+ posts]

If you bridge the front 4 chs it should give you 125 x 2

 

[Kold_Killa 10+ year member]

If you bridge the front 4 chs it should give you 125 x 2

At 4 ohms, correct???

What about the RCA situation??? I guess I should use two runs?

 

[Kold_Killa 10+ year member]

What components are you running? if they are bi-ampable i'd go that route before bridging.

CDT CL-61A... what is biampable... don't have a clue...

 

[UCF52 10+ year member]

At 4 ohms, correct???
What about the RCA situation??? I guess I should use two runs?

I just did the same for my 5-channel (KX700.5)

Run just your front pre-out rca and then get 2 "Y" splitters and split the left channel into amp 1 (ch. 1&2) and then split the right channel into amp 2 (ch. 3&4); then when you make your speaker connections just bridge both inputs for each speaker amp. Then obviously your sub channel for your sub.

Maybe you can get a more clear explanation of it from somebody else; I received help from "jmanpc" and "dejawiz"

 

[tRidiot 10+ year member]

CDT CL-61A... what is biampable... don't have a clue...

I once put a setup exactly like you're describing in a friend's truck, with the same components and amp. We just bi-amped his, running front two channels to the tweet input on the passives and rear channels to the mid input on his passives.

It was really nice and loud. He was extremely pleased and I think he's still running that setup to this day, about 4 1/2 years later.

 

[Kold_Killa 10+ year member]

So one channel of the front to one of the passive crossovers tweeter input, and then the other channel to the other tweeter input on the other passive crossover? And then the same for the two rear channels, but to the mids? So I would get 75watts at each tweet and each mid?? Is that what you mean?? Or I guess it is probably more like 37.5 watts to each??

 

[tRidiot 10+ year member]

Yes, that's what bi-amping means. One amp channel to each channel of each passive crossover. And yes, you would get 75W to each speaker this way.

CDTs love power, in case you hadn't been told. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[DejaWiz 5,000+ posts]

If you bridge the front 4 chs it should give you 125 x 2

Incorrect. Bridged, it's 2x250w rms @ 4 ohms.

To Biamp:

Channels 1 and 2 to the tweeter inputs, channels 3 and 4 to the mid inputs.

Front RCA's from HU (for tweeters) to channels 1 and 2 amp inputs, Rear RCA's from HU (for mids) to channels 3 and 4 amp inputs.

 

[Kold_Killa 10+ year member]

Incorrect. Bridged, it's 2x250w rms @ 4 ohms.

You mean 150?

To Biamp:Channels 1 and 2 to the tweeter inputs, channels 3 and 4 to the mid inputs.

Front RCA's from HU (for tweeters) to channels 1 and 2 amp inputs, Rear RCA's from HU (for mids) to channels 3 and 4 amp inputs.

So don't use the passive crossovers?? Just straight from amp to tweets and mids and then use the amp's built-in crossovers??

I don't know why I am having a problem understanding this....

 

[DejaWiz 5,000+ posts]

You mean 150?

No, it's 2x250w rms when bridged. Look at the manual again. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

So don't use the passive crossovers?? Just straight from amp to tweets and mids and then use the amp's built-in crossovers??

I don't know why I am having a problem understanding this....

To biamp, yes, you use the passives if they are biamp capable. Channel 1 (white RCA in) to the left tweeter passive crossover input, channel 2 (red RCA in) to the right tweeter input, channel 3 to the left mid input, channel 4 to the right mid input.

If you don't want to use the passives, you can go active by using a decent active crossover, like the Profile RX30R or the Memphis 16-XO3.

 

[Kold_Killa 10+ year member]

Well I'll be ****ed!!!! That is awesome... I better be easy on these gains.

 

[AAAAAAA 10+ year member]

First off....

Bi amping using the stock xover if it is capable of doing it is useless if you are going to be using the same amount of power. You will get no gain at all. Passively bi amping is good if usually you have another pair of outputs that will give more power for your midbase for instance then for your midrange\tweets.

Actively xovering with the same power is different though, because it plains sounds better then passive xovers. As long as your amp has a HPF around 3khz or more for your tweet.

It would seem best to bridge your current setup and get a ton of power, but be carefull with your components, keep gains down. You don't need to get an RCA y adapter as someone else mentioned.

Just plug in one rca into the left (white input) of the "front" input of the amp and the other RCA into the left (white input) of the "rear" input of the amp.

When bridged, the amp only needs one rca input to work since that side (front or rear) will then be working mono. You just have to make sure to plug it into the white input.