SAZ-3000D POWER TESTING

[sundownz 197]

REGULAR VOLTAGE TESTING:

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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COMMENT 7-20-09 : These are results with OLD meters... do not compare directly to new testing. Will update this with new equipment.

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.

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HIGH VOLTAGE TESTING:

Thanks to Sean we did some power testing on the SAZ-3000D yesterday. Power testing was done on two RE MT 15" woofers, dual 1 ohm coils (0.7 ohm DCR) with a rise to around 0.87 ohms at our test frequency.

Power Output at Maximum Volume before Protection:

67.4 volts

77.1 amps

5196 watts

Power supply voltage was 16.5 volts at rest dropping to around 14.5 volts.

Our clamp meter ran out of steam at 400 amps so we measured efficiency at lower levels:

3294 watts @ 84% efficiency (252 amps draw)

3938 watts @ 81% efficiency (316 amps draw)

4424 watts @ 74% efficiency (392 amps draw)

We didn't have an electrical setup to run 12.8 volt testing available at this time.

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Regular and High Voltage Posts Consolidated on 10-23-08

Original "Regular Voltage Thread" Here:

http://www.soundsolutionsaudio.com/forum/i...?showtopic=9952

[Silverbane 0]

Thanks to Sean we did some power testing on the SAZ-3000D yesterday. Power testing was done on two RE MT 15" woofers, dual 1 ohm coils (0.7 ohm DCR) with a rise to around 1.15 ohms at our test frequency.

Power Output at Maximum Volume before Protection:

67.4 volts

77.1 amps

5196 watts

Power supply voltage was 16.5 volts at rest dropping to around 14.5 volts. So consider this a 14.5 volt output rating.

Our clamp meter ran out of steam at 400 amps so we measured efficiency at lower levels:

3294 watts @ 84% efficiency (252 amps draw)

3938 watts @ 81% efficiency (316 amps draw)

4424 watts @ 74% efficiency (392 amps draw)

We didn't have an electrical setup to run 12.8 volt testing available at this time.

Damn that looks hot!

[bjboertje 0]

koo, i'm gonna want one of these when i've got the money.

[audio-neon 34]

Awesome work Jacob, just let your team know when we can get them!

[splblazer98 1]

I heard the numbers from this test via phone and it's amazing what this amp can do

[JimJ 11]

What does it do under an ohm

[sundownz 197]

What does it do under an ohm

Nominal was under 1 ohm, but actual impedance was above 1 ohm. I will be doing more testing down the line.

[bigjae1976 0]

So ~5200 watts at 14.5V and .5 ohms nominal? WOW!

[Rickyharrisjr 0]

Awesome work Jacob, just let your team know when we can get them!

X2

[sundownz 197]

They will be in around 2.5 - 3 months from now if everything goes smoothly.

[bjboertje 0]

i want to see 12 volt numbers too.

[sundownz 197]

i want to see 12 volt numbers too.

That might have to wait until I get the production models so I have an electrical system capable of doing the testing on hand.

[bjboertje 0]

or.... you could send me one and i could test it for you

[sundownz 197]

or.... you could send me one and i could test it for you

The only proto has been sent out to a Team Sundown member, sorry Once I get production models I should be able to test 12.8 volt power in my Civic as it will be up and running by then.

[Team Sundown Kevin 0]

Yea jacob ill take it easy on it and well see what kinda numbers itll do im expecting really good things, btw check ur email.

[Team Sundown Kevin 0]

Hey jacob played around a little today and all i can say is these are monster amps , really work well to, thanks alot man.

[sundownz 197]

Hey jacob played around a little today and all i can say is these are monster amps , really work well to, thanks alot man.

Awesome, glad to hear it I'm sure it'll do you well in the lanes too!

[stevew007 0]

Hey jacob played around a little today and all i can say is these are monster amps , really work well to, thanks alot man.

Awesome, glad to hear it I'm sure it'll do you well in the lanes too!

well what's the word? power ? number's? what did you replace amp wise?

[Team Sundown Kevin 0]

power wise RE audio recoments 2000 watts per sub to get em moving, im using 2 12's so u do the math on that, nmbers gaind about 2 dbs so far from 2 1500's in my setup cant say what class or what numbers cuz of me being a competitior and not wanting to let the cat outta the bag yet.

[stevew007 0]

power wise RE audio recoments 2000 watts per sub to get em moving, im using 2 12's so u do the math on that, nmbers gaind about 2 dbs so far from 2 1500's in my setup cant say what class or what numbers cuz of me being a competitior and not wanting to let the cat outta the bag yet.

what amps did you replace to get 2db gain? or is this a new build?

[audio-neon 34]

he went from 2 saz-1500d's to 2 saz-3000d's i believe

[sundownz 197]

Kevin had a pair of 1500Ds and swapped to an SAZ-3000D. Not sure on all the details of his 2 dB gain, though. He may want to keep it a secret.

[bjboertje 0]

an SAZ-3000D

does that mean one?

[stevew007 0]

well that is what I want to know if he made a 2 db gain from just swapping amp's? that would say a hell of alot for sundown.

[Team Sundown Kevin 0]

Yes everyone a 2db gain from 2 1500d's they also have handled everything ive thrown at them so far will know a lil more tomorrow or friday when i try the .7 ohm coils on the 3000 so far it has held .5 fine. as i said before i will know more tomorrow or friday