Nice! what kind of power supply is supporting those numbers?

 

Unloaded? Are you just squaring voltage?

You're killing me.

 

Any chance of some guts ... ? Please:sad5:

 

 

And yes just voltage squared method sorry lazy will post actual ac voltage out and there some very good gut shots on their Web page

 

The heart of the amp is a Ti micro msp430F2112. Wonder if they locked the JTAG interface?

 

Ground terminal is bolted to the outer shell.

Bottom side:

 

Shit Corey you already repairing one?

 

Lol..same thing I thought...

 

First one I've seen.

 

Talked to banda usa theres been one sent back for grounding speaker + while playing. And mine might have gone back lol I hooked up + and - reverse lucky it go protection lol.
How you like the sm parts Corey. The 250 amp fuse is a bit disheartening

 

:thumbsup:

 

I've working with surface mount for over 20 years, no big deal there.

 

The 250A fuse-

Be having the background with Taramp's, first thing that comes to mind is, well simply, they are accounting for it to be wired at 1ohm so the fuse will not pop..

Well, i have 2 problems here-

1, the 5k and 7k both use the same size fuse. This is a curious question there..

2- the biggest problem i have is it's rated for 5,100w @2ohm 12.6v.. yes 12.6v. Over 6,000w at 14.4v

I've done plenty of playing around with fusing in my day as MECA was only close organization around my area.

For continued currect draw in a daily environment, i've experienced the following-

Using custom fuse blocks for more adequate surface area, fusing does not like to be subjected to a continuous averaged draw of around 50-70% more the rating of the fuse.

In my experience, the fuse would never pop, it would slowly discolor overtime creating resistance.

Resistance=heat and there is no protection around that fuse if heat creates smoke.. and then enough heat to start burning something.

At the lowest current draw, the LEAST i can possibly create an example is the following-

5,100w @12.6v based on 90% efficiency(for example)-

449A of current draw minimum and this is simply just using batteries.. Just adequate batteries, no alternator required in this example.

250A fuse results in a draw 80% more than the rating.

Now, one of 2 things can only happen.
1- the fuse will pop
2- the fuse will not pop

If you have enough batteries, it is assumed to say that could be dangerous for the integrity of the amplifier.

Now, if i'm not mistaken, Banda-USA gives the customer the option to allow to use something they have made to relocate the fuse outside the amplifier.

While this is great idea, especially could upgrade size... Is upgrading the size safe?

All these questions i have is something you guys should find out!

FYI- Taramp's HD8000 is rated for following-

5,250w @2ohms
Manual suggests a 430A fuse, so let's say 450A.

We have ONLY and i mean ONLY ever had a necessity to recommend a user increase their fusing size because their electrical system is so good for the amplifier, that they were pulling close to 600A and popping it so we suggested a 550A and has been fine.

So, in this example, we fuse for the load and application it is used for without failure.

Perhaps Banda's fusing is literally the same way, with the exception that according to calculations, they do not want or expect large battery bank.

While speculation needs to be tested, it does need to be tested.

I'm sure these amplifiers do their rated power fine. It's the consistent output that has me curious on a GOOD electrical system.

We all know it is not designed for a true 1ohm load which is fine.
But a true 2ohm load for several minutes would need to be tested or perhaps longer and then inspect fusing.

Answers to these questions would be great!

 

I would strongly like to add my position that i am FULLY biased on the POSSiBILITY that having too many batteries can be bad for these amplifiers.

I'm not biased on the brand, i'm biased on the degree of engineering involved.
So hopefully, me saying this can have them tested to ensure Banda is not low quality that was being sold several years ago by practically every brand....
Including Taramp's until they finally ditched the TA line.

Why am i biased on this speculation?

Here's why-

While doing research with Taramp's for a long time, a user, not to be named here, gave us plenty of information he had first hand in south america curious about Stetsom.

One particular issue is one of their large 12v amplifiers fried from too much power(electrical system was stout).

Stetsom questioned the user about his electrical system and said it was played with vehicle off. Only batteries.

Once questioned about the quantity of batteries, Stetsom determined too MANY batteries were being used for this amplifier and killed it.

Now, step back and laugh your ass off because that's the most terrible real reason for an amplifier to fail.. but Stetsom had this problem.

So, it's very wise to inspect these calculations to understand what other brazilian brands may NOW still, if any, have this problem.

Nobody is looking for high power with terrible electrical system so it must be investigated for the sake of the customers.

 

Shizzzon I value your questions and opinion I would hope to be able to test you questions and theories coming up in the near future. My alternators should be here tomorrow so should have testing mule up tomorrow.

 

That's good.

Whoever tests it.. please don't square voltages,

From what Banda has told us(banda usa), the amplifier can safely accept up to 15v for daily usage so if that really is true, then the onboard stock fuse is determined only for low quality electrical systems and "can" be upgraded" when necessary without potential damage to amp.

But don't assume this! Not until thoroughly tested.

 

I ran mine at 15.2 just fine. Love this amp. All day demos at my last show and the amp was MAYBE 10degrees warmer than ambient temp.

 

1ohm nominal? These shouldnt get hot..

Brazilian amplifiers tend to stay cool pretty easy.

Guess i'll add too that even if 1ohm nominal, we still need a long duration of measuring current draw..

Then of course inspecting the fuse.

Don't open it up if it voids warranty though.

 

just under 1ohm.

 

I have had my Taramps Hd6500 get hot-ish, but with the fans and the smaller heat sink, it gets cool VERY fast. Probably should mention I set the gain to a soft clip at max volume

 

Maybe we need a definition of hot? lol

Thick aluminum heatsinks so hot will leave imprint on your hand with possible burn..

That will never happen.

Now i've touched Taramp's wired way below 1ohm nominal and then they will get hot hot but not hot enough to burn you.

 

hot as in, "wow that's hot" but not enough to make you want to pull your hand off

 

The fuse analogy makes no sense. If the fuse gets hot and creates resistance then the output naturally drops no matter the battery bank size.
If your fuse fails to blow at 1.5 times its rating then buy a fuse that will.

 

Fuse fail to blow- if it were to do this, i'm afraid people may put larger in there and may be bad idea-

I understand resistance but it would still generate heat..
Or at least we could say it would drop it's input voltage more and more if the fuse was very bad until potential failure..

User wouldn't know because the voltage was being measured outside the amplifier.

For the record...a 250 amp Mega fuse usually takes close to 500 amps to actually blow.

I'm talking about sustained output, unless you are too?

If so, then that's great info!

 

For the record...a 250 amp Mega fuse usually takes close to 500 amps to actually blow.

 

Megafuses will take a lot of current for a 30second run.

 

I did not know this.

Then this can\could retract my theory completely then

 

It's the same fuse that GM uses on their batteries. My buddies 2500hd, dual alt/battery setup still using the factory 100amp megafuses on the batteries and they've never popped.

 

That's not enough though.

The HD2500 recommends 135A already...

 

i just seen you were referring to the entire car, not just the amp.

How many megafuses? I seen you made it plural.

 

one per battery.

 

Ok i found info..

Thanks for making me research it, heh.

Megafuse-

135% above rating duration(338A)- 30minutes
200% above rating duration(500A)- 15seconds
350% above rating duration(875A)- 5seconds


Ok, so that kills me theory.. Yay!

 

While trying to test one of these for a Banda vs. Taramps showdown, the Banda popped that fuse on the first 1 ohm burp. Poof.

Banda, when asked, said, "just put a buss bar in there."

Umm.. ok? Then wtf is the thing for?

I've also been told by Banda that *their* amps will run a 1 ohm resistive load. I've not yet had the chance to test this though.