Bridging question - please help

[kowboy 10+ year member]

Pardon my ignorance, as I'm a relative newb, but I want one of these autotek amps to push my front components. I only NEED two channels, but the four channel amps say that they're much more powerful bridged to two channels. Looking at the chart on the bottom of their page, you'd think for example that the mm 100.4 would give you 300Wx2 at 4 ohms. But if you read at the top of the page, it looks like they're saying that you'd need to bridge TWO of the same amp in order to get that power. Anybody have/had one of these amps? How do you "bridge" it? Would I be better off getting the mm 125.2?

http://www.maxxsonics.com/autotek/mm_amps_24Channel.html

Click to read more...

 

[dleccord 5,000+ posts]

Looks like it. Either that or when you bridge their channels, they increase 3 times the watts?

 

[kowboy 10+ year member]

Looks like it. Either that or when you bridge their channels, they increase 3 times the watts?

Well, only 1.5 times really, (600W going into 2 channels instead of 400W into 4), but still it's a substantial difference.

 

[Prowler573 5,000+ posts]

Pardon my ignorance, as I'm a relative newb, but I want one of these autotek amps to push my front components. I only NEED two channels, but the four channel amps say that they're much more powerful bridged to two channels. Looking at the chart on the bottom of their page, you'd think for example that the mm 100.4 would give you 300Wx2 at 4 ohms. But if you read at the top of the page, it looks like they're saying that you'd need to bridge TWO of the same amp in order to get that power. Anybody have/had one of these amps? How do you "bridge" it? Would I be better off getting the mm 125.2?
http://www.maxxsonics.com/autotek/mm_amps_24Channel.html

Nope ~ that's just fairly clever marketing trying to convince you to run nothing but their amps. The more of their gear you buy the more profits they make. //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

The 100.4, according to the specs, will make 300w X 2 @ 4 Ohms in mono bridged mode.

As far as "how" to bridge it I would assume it would be the same process as bridging most any other bridgeable amp:

For output channels 1&2 you'll connect one of your speaker's positive input to the positive output on Channel 1 and the speaker's negative input to the negative output on Channel 2

Follow the same method for channels 3&4 to bridge them to the other speaker.

 

[kowboy 10+ year member]

Nope ~ that's just fairly clever marketing trying to convince you to run nothing but their amps. The more of their gear you buy the more profits they make. //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif
The 100.4, according to the specs, will make 300w X 2 @ 4 Ohms in mono bridged mode.

As far as "how" to bridge it I would assume it would be the same process as bridging most any other bridgeable amp:

For output channels 1&2 you'll connect one of your speaker's positive input to the positive output on Channel 1 and the speaker's negative input to the negative output on Channel 2

Follow the same method for channels 3&4 to bridge them to the other speaker.

Hmmm...that's what I wanted to hear. "cause that means that hell, I could get the smallest one (mm 50.4), and bridge it and get 160W x 2! And those things are pretty cheap nowadays. Same with the mm 75.4 (which is what I'm prolly gonna go with). Anyone else wanna confirm our findings?

 

[luvinthebass 5,000+ posts]

Hmmm...that's what I wanted to hear. "cause that means that hell, I could get the smallest one (mm 50.4), and bridge it and get 160W x 2! And those things are pretty cheap nowadays. Same with the mm 75.4 (which is what I'm prolly gonna go with). Anyone else wanna confirm our findings?

that means 160W to each bridged channel then right?

 

[Prowler573 5,000+ posts]

that means 160W to each bridged channel then right?

Correct. At 4 Ohm stereo the 50.4 will give you either 50wpc into 4 channels or 160wpc into 2 channels.

 

[maxxguy1 10+ year member]

Correct. At 4 Ohm stereo the 50.4 will give you either 50wpc into 4 channels or 160wpc into 2 channels.

x2. Same with the 100.4 its 100rms at 4ohms each channel and 150 at 2ohms per channel so yes if you bridge 1&2 together at 4ohms you would get 300rms and the same with 3&4.

 

[kowboy 10+ year member]

thx everyone.