DD 1015 SVC 4ohm

DD 9915 DVC 0.5/0.5ohm

Test amp DD Z1

Test Battery Optima Blue top d31

Test Car Astra

Test box, 3.5cf ported. Not sure what it's tuned to, not sure how big/long port is.



DD 1015 @ 4ohm 139.4db

DD 9915 @ 0.25ohm 147.3db

Not sure what the results mean. It's safe to say the 9915 was louder.

What about the 9515 from the other day??(same setup)

it was a 9915 (older series). it did do a 148.3, but it could have been conditions. the power wires were really hot when i connected them today. different mic too

This tells us that the z1 puts out more power at .25ohm then 4ohm

Don't suppose you have a reading of the 9915 @ 1ohm off the z1?
That'd be an interesting coparision compared to .25ohm.

What Hz did they play at?both subs the same?
Do you think the 1015 would have gone any louder with more power?I know to make the 1008 do 139's it was bottoming out(4 ohms 3000D)would like to try 3 1008's one day still be in st-a

With the 9915 and 1 3000D(0.7 ohms) in a laser sw I get pretty much the same as you,low 148's but I use a larger box 5.5cuft(burp at 49hz)If I could load the amp down more pretty sure it would do 149's.
If I invert the sub I gain .3db but subs just over the window line by about 8 inchers need to make another box alittle bigger or get a smaller car(some older model fiats over here )

Clarkie

ps:How long has the 1015 been out?

1015s have been in Aust for a little over 2 weeks.

Interesting, a sixteen times difference in load.

Phil

how much RMS was each sub getting when you tested them?? cheers vs380kw

the 1015 was no where near bottoming out. i'm pretty sure they were both peaking at around 57hz. the box isn't really tuned properly, it was only a throw together box.

i think a larger box, say 5.5cf would be better suited in the astra. but i just had to try and small box because everyone else in europe tends to do well with small boxes.

the 1008 is another little sub i need to test. it absolutely pounds for an eight, should be interesting to have a play with it when i get more time.

not sure, did not have a clamp on the speakers...

i would assume though, 4ohm load nominal, maybe 10ohm at the note. so for the 1015, maybe 500-1000wrms

0.25ohm nominal, say 1ohm at the note, so for the 9915 maybe about 2000wrms

The Z1 has been tested OS at over 4000W, 12V 1 ohm. What voltage did you hold?

Phil

we dont know, he just showed up did some burps, took out the 1015, hooked up his spare power cables at the front, wired up the 9915 and away he went again.

agreed. a fairer test would have been running the 9900 at 1ohm. how ever i guess the purpose was not to be fair between but make each the loudest it can go.

Awesome A 15" 1000 series!

Talk about David and Goliath.

1015 600W $329
9915 3000W $2299

Phil

Didn't David win?

i don't know

it was funny, i only had one run of 0ga to the z1 at the start and i was wondering why the score was a little low. i then hooked up the other 3 runs and the score went up about 1db.

Do a test between a 9515 Dual 2ohm with the coils wired in series,

Then compare it to the 1015, identical power through each subs.

This way the test wouldn't be completed pointless.

I wouldn't be surprised if the 1015 would be lower at the lower power levels, as this has been proven to be the case many times with other brands.

Actually Maz I disagree about calling the test pointless.

In my opinion the advantage of the higher model SPL woofers is it's capability to perform with considerably more power through it.

I'm not sure many people are trying to win SPL comps with 600W, and are looking to see which will perform best with the same amount of power.

Yes it is pointless.

Say you had two Dual 1ohm 9515 subs

Wire all the coils in parallel and at 0.25ohm they get say 150db. Run them all in series at 4ohm they get say 142db. All the test proves is that in parallel the amp put more power into the subs so they went louder.

We need far more data to turn the ripped results into information. You cant just go by the rule that 3db is double the power, as in the real world this isn't always the case.

If we knew how much power each the 1015 was getting on each burp due to the higher impedence and then turned down the gains with the other sub so they both had the same power, then the results would be much better.

Depends what you're trying to prove

I saw how upgrading to a big-ass sub with a huge power handling took full advantage of the amp's capabilities and got a much higher score.



Poisoner got it right!

YES!!! i love it when im right!

whether or not the test was ideal, for what ever reason, it is a test, its hard to do back to back comparisons unless you want to go out and buy several products meaning big money...

i enjoyed reading real figures that someone has come up with, which is better than all this theoretic bullpoo that some ppl seem to pull out of no where.

the Z1, i would think, would be putting out alot more(even @ 40hm) than the 1015 is rated at(i kno they can take more) so imagine it would be quite easily reaching its X-max. <<<< oh wait i just pulled that out my ass didnt i??? whoops