Wicks' E46 M3 Build. Hertz 3-Way Set from Tony D!

[Kyblack76]

Did you do what i told ya to do 8 months ago?????

[Wicks]

Did you do what i told ya to do 8 months ago?????

Haha.

Said screw it and dropped the impedance down to 0.25

Here's the actual impedance sweep:

The "true" impedance really only drops to ~0.5ohms.

[Kyblack76]

........ yup..

[Kyblack76]

You will find "some songs" that will protect..

some will play fine, ......

atta boy

now you have a daily, and comp set up...

welcome to the fold

[Kyblack76]

your enclosure VS mine, subs and power with do this and that......

Hows your voltage holding??

can you play 3 or 5 songs at that full?

[Wicks]

Well... here's full disclosure.

My previous "Legal" score that I measured, wired at 1ohm:

Then after dropping to 0.25ohms:

Nowhere near the gain I expected as my power should be GREATLY increased.

I'll do some clamp tests to check but the impedance measurements don't lie.

I have a suspicion that my SPL Labs meter is reading a bit low.

Every competition that I attend is showing about 1dB above what I measure.

So my next competition should go a good 147dB which is at least where I wanted to be.

After Legal, I wanted to see what I could to Outlaw.

That's where this came from:

With the knowledge that my meter mght be reading low, this shows that I'm solidly in the 50 club

And DAMN does it get down with a 41Hz test tone.

Now to the real question...............Daily.

Sorry to state that this configuration does NOT work for daily.

I've played a few songs and as expected, at certain frequencies, the DC5K goes into protect, with any song that I push hard.

So the DC amp definitely doesn't like "real" 0.5ohm loads.

The system also doesn't like a full tilt burp either, like I usually did for dBDrag.

Way too much surge current into the voice coils.

With this configuration I need to roll into the higher power, not burp it which makes sense as burping full tilt probably gives way too much of a surge current. Rolling into the volume gives the impedance a chance to settle and stabilize the amp into a safe range.

Dissappointing......yes, but expected.

Wiring to 0.5 is one thing but 0.25 is a whole different world.

Also, the way the amp plays music is a bit different.

I was told that the amp would sound different at 0.25 and it certainly does.

The subs get a bit wild and are much more uncontrolled then they were.

They also bottom out which I wasn't able to do at 1ohm.

So I don't think that running 0.25 is what I want to do for daily, but it sure comes in handy for competitions.

I have an idea that should allow me to switch between the two configurations easiily and I'm thinking about giving it a try.

It will be a wiring challenge but in the end will be real nice.

Oh yeah.

Kyle, my voltage does drop quite a bit wired to 0.25 but my modified "VM-1" still doesn't drop in the red, so my electrical seems to be able to hold up.

For competing it should be no sweat, daily, it might have issues after a good amout of demo'ing but the amp tends to protect fairly soon anyway.

Keeping the volume down, so it doesn't protect, isn't really worth it. To the ear, the system was louder at full tilt when wired to 1ohm, then if I hold the volume down at 0.25ohms.

So there it is!

After this, reconing to 0.5 would probly be spot-on.

BUT...if I can pull it off, upgrading the amp to a 7k would make this system SCREAM!

[hdorre]

Amazing write up! My god..

[SnowDrifter]

Strap it at .25 you big baby

Pretty crazy stuff. By the way congrats on that 150. 150 with 2 12s no matter how you cut it is impressive!

[Wicks]

Amazing write up! My god..

Thank you Sir

Strap it at .25 you big baby

Pretty crazy stuff. By the way congrats on that 150. 150 with 2 12s no matter how you cut it is impressive!

Haha. I like how you think Snow!!!

Strap two 5K's to my 0.25 load....

I think my batteries would vaporize.....

Thanks though Dude.

I have to say, while I was metering the Outlaw score, the sound was pretty damn intense.

The car was shaking like crazy, my vision was blurry...it was AWESOME.....

It's a ton of fun uncovering these abilities in my system that I didn't think were there.

When I started, my best outlaw was 146dB.

Now I'm a solid 150dB.

Not bad for just playing with a few settings.

"Stay Thirsty My Friends!!"

[Krakin]

You might be able to look into capacitive, inductive, and resistive loads. I know it is probably not reasonable for you to consider a new enclosure yet, lol, but probably good to look at.

Just a little example of a Powercube test on an amp.

I've never seen anything on the DC amp, or any of the other similar amps out there, so I have no clue what they might look like. Especially at such a low ohm load.