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Finally SPL results for AV12s


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15 replies to this topic

#1 of 16 OFFLINE   JimRHIT

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Posted April 29 2003 - 10:05 AM

Hey guys, Finally got around to testing out the twins.

Dual AV12s with 4 PR 15s. Tune = 19 or 20HZ

100Hz = 113db
90Hz = 110db
80Hz = 108db
70Hz = 109db
60Hz = 108hb
50Hz = 107db
40Hz = 108db
30Hz = 107db
20HZ = 108db
10Hz = 106db

These are uncorrected meter readings...dont know the corr factors...anyone car to update these with the fix thats cool Posted Image

These are driven by NAD216THX one channel to each ~225Weach.

I am quite happy with these results...but the amp was quite hot when i started..so it didnt want to keep up too long.

I did see 124bds on the meter yesterdy on a cold amp at ~30Hz amd 118db at 20Hz... but the amp stopped liking that after about 10 seconds


later everyone

jim
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#2 of 16 OFFLINE   Justin Ward

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Posted April 29 2003 - 11:50 AM

I'm not sure exactly what the correction values are but those numbers look awesome. You seem to have a very flat in-room response, did you EQ it?

#3 of 16 OFFLINE   Brett DiMichele

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Posted April 29 2003 - 01:43 PM

Jim,

Those numers are LOW! The Correction factor from what I
recall adds at least +6 Db to those numbers.. That's putting
out some serious low bass Posted Image Posted Image
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#4 of 16 OFFLINE   Ronnie Ferrell

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Posted April 30 2003 - 12:54 AM

Corrected values if you used the RS SPL meter.


________ORIG.___RS CAL__Corrrected
100Hz = 113db___+2______115db
90Hz = 110db____+1.75___111.75db
80Hz = 108db____+1.5____109.5db
70Hz = 109db____+1.5____110.5db
60Hz = 108hb____+1.5____109.5db
50Hz = 107db____+1.5____108.5db
40Hz = 108db____+2.5____110.5db
30Hz = 107db____+3.5____110.5db
20HZ = 108db____+7.5____115.5db
10Hz = 106db____+20_____126db

Posted Image 126db at 10Hz??? Posted Image That's GOT to hurt!

rf
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#5 of 16 OFFLINE   Geoff L

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Posted April 30 2003 - 03:35 AM

I find it interesting that he is getting this with what might be considered slightly underpowering them. Am I missing something here?
Well you do have 2 running that I missed when reading the post....

Very very impressive numbers!

Also is the tuning you belive correct. That kind of output below tuning, 10-hz wow, and a little strange to boot with that kind of spl below the mentioned tuning point.

Jim:
Did you notice the tuning around 19-20hz when doing the testing, the driver seemingly "moving the least" around that 19-20hz freq point?

Where did you take the measurements from, listen postion, 3-feet and how big is the room your filling?


WOWZER is all I can say, that 10-hz is flat out scary for the alingment/power actually!

Regards
Geoff
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#6 of 16 OFFLINE   JimRHIT

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Posted April 30 2003 - 05:37 AM

Yeah, the low output is downright scary...moves walls in the house 3 floors down. I am not positive that my tuning is 100% accurate, as I just ordered the 1400g unit and slapped them in 3.2cubes w/ driver.

To be honest, the PR are going much crazier at 10Hz than 20Hz ... so I don't know.

gotta run to lab....back later to post more
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#7 of 16 OFFLINE   Kyle Richardson

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Posted April 30 2003 - 06:38 AM

Very impressive numbers. Did you test at 1 meter, listening position, or close mic'd?
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#8 of 16 OFFLINE   Geoff L

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Posted April 30 2003 - 07:01 AM

Kyle

Same thing I wanted to know, along with his room size if taken at the listening position.

And the monster output a 10hz, strange given the possible tuning point!????

A very "Curious"
Geoff
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#9 of 16 OFFLINE   JimRHIT

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Posted April 30 2003 - 10:39 AM

Hey everyone,

The test were done with in my 13x16x(8 that slopes to 4) bedroom, living room, dining room...yeah one room apt.

Radio shack meter was placed in 3 ft in front of left sub(they are stereo-style setup outside my RF3s). Test material was IASCA SSS Bass test(MP3 format) on my compter through the marantz via RCAs. I don't know why low end output is so huge. I am thinking that since these are pretty crappy boxes...lots of wall flex(read:scrap plywood), that may be adding to low end output. I have them 100% sealed up with gaskets from PE on the drivers and silicone in all cracks. These boxes are temporary until I decide what to do with them.

I am going to try and post a movie(.mov..hope ya got qt) of the meter for the last 100HZ-10HZ sweep of the song...check back sometime Friday for that...have to get my friend's Kodak and I have 2 tests these next 2 days.
Your guess is as good as mine, but I am not complaining about it.

Anyways, I will let everyone know what happens this weekend when I hook a Crown Powerbase-2 to them to test some limits.

About underpowering these...i don't know, that NAD is one hell of an amp.

Take care

Jim
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#10 of 16 OFFLINE   Geoff L

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Posted April 30 2003 - 11:07 AM

Jim:

Things are starting to be a little clearer now in how it's all together, room size, way of measurement, cabinets, et.

Thanks for filling us in.

As far as power, I ment that your quoted wattage was what I based that on. The Nad most likly has a nice amount of headroom and capable of more power than your quoted the contious power rating. I'd imagine the peek output is "much higher" and that as we all know is a good thing..Posted Image

You certainly can put out some serious deep spl thats for sure, crappy flexing cabinets with possible added hamonics and all!

Regards
Geoff
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#11 of 16 OFFLINE   Frank Carter

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Posted April 30 2003 - 02:15 PM

A job at Klipsch...I'm sooooo envious.

#12 of 16 OFFLINE   Geoff L

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Posted April 30 2003 - 02:28 PM

Yes Frank, the same thing I was thinking.
Work that one might actually look forward to going to!

To cool Posted Image
You Luck dog Jim!
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#13 of 16 OFFLINE   JimRHIT

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Posted May 01 2003 - 04:17 AM

edit
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#14 of 16 OFFLINE   Brett DiMichele

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Posted May 01 2003 - 04:52 AM

Jim,

And those kids are gonna say "Who's Klipsch?" Now if you
said "I work for Bose" then they would go "woah" Posted Image

Congrats! Posted Image
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#15 of 16 OFFLINE   Frank Carter

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Posted May 01 2003 - 05:06 AM

Jim,

I hate youPosted Image...just kidding.

Congratulations on your new job, now you can give us the inside scoop on whats up and coming at Klipsch.

What's your official job title?

#16 of 16 OFFLINE   JimRHIT

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Posted May 01 2003 - 07:29 AM

Just sold one of 'em .. ya know you can make a pretty good profit on these Posted Image

take it easy ...

jim
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