Why people not like strapping amps?

[scooter99]

AMI IS NOT CONCERNED WITH THE POWER. HE IS SAYING THE CURRENT IS NOT THE LESS WHEN THEY ARE STRAPPED

Why you yelling? CAPSLOCK RAGE!!!!

I'm really enjoying this thread. So much info on here.

[CleanSierra]

He never said they will make more power, but be different in HOW they make power. Unless I am misunderstanding his post.

Will AD1 tell ouput voltage and current peaks? that would be badass and put an end to this thread for sure.

i don't have 2 of the same amps that are strappable other then my T4k's. And i don't have the power supply to bench 1 T4k, let alone 2. I would have to run some zero gauge over to my truck to do that and i MIGHT......but if i do, it will be for 1 amp, not 2. I am not planning on hooking up 4 runs of 1/0 directly to my alternators, that have NO room on any terminals anyway. I will prob try to squeeze ONE run on there and do some larger amps but 2 will be hard. I might be able to do 2 smaller amps (on my battery bank/bench), like T1000 bd's, but i don't have 2 of those....

so yes, that would be a great test! but the AD-1 is highly dependent on the power supply you give the amps and i am limited to how much power i can test on my battery bank. I need to just knuckle up and get 50 D1400 batteries and make a REAL bench. 3 just isn't enough.

I'll happily send my T1000bd for testing if you are down to do this test

Let me know sir. I'll pay to ship your way, if you get the return

[meade916]

He never said they will make more power, but be different in HOW they make power. Unless I am misunderstanding his post.

Will AD1 tell ouput voltage and current peaks? that would be badass and put an end to this thread for sure.

i don't have 2 of the same amps that are strappable other then my T4k's. And i don't have the power supply to bench 1 T4k, let alone 2. I would have to run some zero gauge over to my truck to do that and i MIGHT......but if i do, it will be for 1 amp, not 2. I am not planning on hooking up 4 runs of 1/0 directly to my alternators, that have NO room on any terminals anyway. I will prob try to squeeze ONE run on there and do some larger amps but 2 will be hard. I might be able to do 2 smaller amps (on my battery bank/bench), like T1000 bd's, but i don't have 2 of those....

so yes, that would be a great test! but the AD-1 is highly dependent on the power supply you give the amps and i am limited to how much power i can test on my battery bank. I need to just knuckle up and get 50 D1400 batteries and make a REAL bench. 3 just isn't enough.

I'll happily send my T1000bd for testing if you are down to do this test

Let me know sir

sure, if you have 2 of them and you send in a letter releasing me from liability if they smoke Not saying they will but you never know.

[CleanSierra]

I just have the one

Yeah, I'll send you a release as well. I trust you will do the right thing and IF it smoked, it wouldn't be your fault, I'm a big boy and I realize that.

[meade916]

I just have the one

Yeah, I'll send you a release as well. I trust you will do the right thing and IF it smoked, it wouldn't be your fault, I'm a big boy and I realize that.

no need to send if you only have one

but thanks for the offer anyway!

[CleanSierra]

No problem, I'll go back to lurking and get my notepad

[meade916]

AMI IS NOT CONCERNED WITH THE POWER. HE IS SAYING THE CURRENT IS NOT THE LESS WHEN THEY ARE STRAPPED

sure, but current is the SAME when they are strapped.

[Kyblack76]

AMI IS NOT CONCERNED WITH THE POWER. HE IS SAYING THE CURRENT IS NOT THE LESS WHEN THEY ARE STRAPPED

sure, but current is the SAME when they are strapped.

Take that neatO ohms law thing, thats getting tossed around. And take the same ohm load, and wattage, and tell me how current would differ....

It to me.. would be the same...

[Wicks]

There are a couple of items getting confused here.

Strapping two mono amps is the same as "bridging" a 2CH amp into a mono amp.

You're doubling the output voltage (which is good), but you also have to increase your load.

By itself, an amp can only run so much current through it.

When you series-strap two of them together you still have to abide by that current limit.

Therefore with double the voltage, you have to double the load impedance.

The current is the same in both scenarios because you have to increase the load when strapped.

So....the power is the same, current is the same, voltage doubles, load doubles.

Typically on the same power, double the voltage would cut the current in half but we're not dealing with the same load.

Yes, cutting the current down whenever possible is a good thing. Less current means less resistive losses through your system as a whole.

One of the main reasons we have an AC power grid and not DC (high voltage / low current).

[Wicks]

Here's a great write-up from www.bcae1.com in case my rambling wasn't clear:

2 Ohm Stereo vs 4 Ohm Mono Loads

There seems to be some confusion as to why a 4 ohm mono and a 2 ohm stereo load are the same, as far as the amplifier is concerned. When two 4 ohm speakers are connected to each channel of a 2 channel amplifier, the amplifier is capable of driving the speakers with half of the total power supply voltage. If the amplifier has a power supply which produces plus or minus 20 volts, it will not be able to drive the speakers on a single channel with any more than 20 volts at any point in time. If we have a 2 ohm load on each channel, at the highest point on the waveform the amplifier will apply 20 volts to the speaker load. Remember that we are only considering a single point in time for this example. If we go back to ohms law...

I=V/R
I=20/2
I=10 amperes

If we take a single 4 ohm speaker and bridge it on that same amplifier, the amplifier will be able to apply twice the voltage across the speaker. This is because while one speaker terminal is being driven positive (towards the positive rail), the other terminal is being driven towards the negative rail. This will allow the entire power supply voltage to be applied to the speaker's voice coil. It will now be able to drive the 4 ohm speaker with 40 volts instead of 20 volts in the previous example. Back to Ohm's law...

I=V/R
I=40/4
I=10 amperes

The same amount of current flows through the output transistors whether the amplifier is driving a 4 ohm mono load or 2 ohm stereo load. As far as the amplifier is concerned, they are the same load.

NOTE:
Some people say that when an amplifier is bridged onto a 4 ohm load, it 'sees' a 2 ohm load. While it is true that the same current flows whether the amp is bridged on a 4 ohm load or a 2 ohm stereo load, the amplifier is driving a 4 ohm load across its outputs. A single 4 ohm speaker can never be a 2 ohm load.