SSA Car Audio Forum: SAZ-3000D Power Testing - SSA Car Audio Forum

Made a separate topic for regular voltage testing. Hopefully I can get more in-depth testing with a stronger electrical system soon.

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Pyramid 50 Amp Power Supply
8 AWG from supply to batteries
Kinetik 2400 Battery
Duralast 1000 CA Battery
2 AWG between batteries
4 AWG from batteries to amp
Fluke AC current / voltage meter
Sears DMM

Measurements:

65.8 volts
49.2 Amps
1.33 ohm calculated rise from 0.6 ohm DCR **
3237 Watts
14.4 volts rest dropping to 10.75 volts

** - Rise was higher than when I tested the 1500D, it was 1.08 ohms for that test. Presumably since my single run of 12 AWG speaker wire is heating up some much due to the extra power. I also did a few test runs at lower volume so the coils were warmer as well.

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UPDATE ON AUGUST 26 2007:

Sean Belanger drove up from SC today with his O-Scope and a bunch of meters.

This setup was in my SPL truck with the engine OFF. At this time I have 2x Powermaster D3100s, 1x Kinetik 2400, and 1x DEKA Intimidator hooked up in the truck.

I had my trusty 50-amp pyramid supply hooked up to my batteries with 12 AWG wire just to keep them topped off, supply was set to charge at 12.8 volts and no higher.

Discovered the following from the testing:

1) Power output stays about the same as what I measured above even with a drop to around 11.8 volts.

2) Efficiency was high at 0.5 DCR with a rise to 1.32 ohms @ ~80% measured at 3030 watts of output.

3) At 0.5 DCR with a rise to 2.08 ohms we measured ~90% efficiency at 2572 watts of output.

4) When the amp was dropped down to 0.175 DCR with a rise to 0.82 ohms power only increased to 3450 watts. At this load we had to roll the volume to avoid protection so voltage was dropping to 11.2 volts by the time we got a reading. Efficiency dropped to around ~65 - 70% at this load.

5) We could have gotten more "output" from the amp but we stopped increase gain and volume when clipping made the wave-form ragged.

My conclusion for the SAZ-3000D is that, even for SPL competition, that dropping under 0.5 DCR won't gain very much. The power gain is small and results in a significant reduction in efficiency.

In a Street-A or similar one-battery limited vehicle the 3000D seems to work best for 0.5 DCR with a 2x - 4x impedance rise for maximum efficiency levels, especially if multiple amps were utilized and efficiency were key.

Am I nuts or are you saying that this thing does 3200 watts at 1.33 ohm (actual) at 10.75 volts?

If I am reading that correctly, JESUS CHRIST. That kinda juice is well worth the price.

That is what my testing showed, yes. I should probably do it again and take a little video

i will be needing one of these soon. jacob, got any b-stock ones yet

bjboertje, on Jul 16 2007, 01:55 PM, said:

I do not have any, sorry!

so u don't have any?

stevew007, on Jul 16 2007, 09:00 PM, said:

I have plenty of brand new 3000Ds, just not b-stocks as he asked about.

nice output! solid numbers and everyone loves underrating

Nice numbers. i dont think anyone expected any thing less from you jacob.

i'm getting very anxious! I'm recieving mine tommorrow

Loud01Blazer, on Jul 17 2007, 12:30 AM, said:

you mean that you are recieving mine tomorrow now hand it over

Jacob just looking at the numbers you posted...

in this test the saz-3000d was drawing about 50amps ?

theabunai, on Jul 17 2007, 02:15 AM, said:

No, that is the output current to the speaker load.

3200 watts at 1.33 ohm (actual) at 10.75 volts.

very nice, low v score. I was thinking of running in street A with one.

haha b stock. if i come with a hammer in hand can i leave with a new b-stock amp?