127 replies to this topic

[jas13]

hi as per title just wondering what everyone has recorded on spl or music with low rms? im working on a new goal to achieve a 140 on music and 145 burp.i have recorded a 138 music and 141 burp on 2 x 12"s and 350 wrms to each sub from the amp at 2 ohms.your input would be greatly appreciated.do you guys think its possible?thanks jas.

[Big_Valven]

Depends on everything. Car, box, port area, woofers, tune, positioning, loading, frequency, car peak.

700 watts rated isn't an overly low amount of power.

[dbdrgaoz]

I have just put a system together in a Toyota station wagon, 1600wrms and 1 x FCW-15 Does 146.7

[Big_Valven]

1600 watts is heaps. Even I've done 146s from 1.6KW...

[ryzaa]

Bobo has done 148ish from 1500w

Doug and I burped a 150 at 36hz off a clamped 1700w and one dead woofer.

As Big V said, 1500w is not really low power...

*Awaits old school guys who had AudioControl meter and Cheater amps*




EDIT: disclaimer: scores set at a certain Easternats event dont actually count

Edited by ryzaa, 31 October 2011 - 02:23 PM.

[barcode]

120 something off 800rms.

lower tuning than you though lol

[Lunchbox.inc]

Mad Ras(spelling?) on here, was doing 141's off 2x clarion 15"s and a jaycar 4x 100rms 4ch in his yellow pulsar, running 2ohm off a pair of the channels, which i believe is around 150rms per woofer...

as far as i'm concerned thats an AWESOME score off <300rms...


700rms really is plenty of power, and 1500rms+ is a tonne...

[268669♫]

If you want big numbers off low power you need a high sensitivity subwoofer and a tapped horn.

Ant

[SSSpoosah]

I'd be thinking probably 300wrms-500wrms

Basic entry level mono amp or multi-channel

[Big_Valven]

I reckon it has to be <500w RMS rated to be considered "low power."

[lunchietey]

138.3 from 300 rms and 2 jl 15w0-8 sealed with music

[SSSpoosah]

138.3 from 300 rms and 2 jl 15w0-8 sealed with music

Mad Ras(spelling?) on here, was doing 141's off 2x clarion 15"s and a jaycar 4x 100rms 4ch in his yellow pulsar, running 2ohm off a pair of the channels, which i believe is around 150rms per woofer...
.

I find both of these very impressive

[Fury♫]

138.3db on a termlab with 1 x 12" in 1cu.ft sealed box off 400wrms... in an excel

[Spink!]

On a first run in an N15 pulsar hatch me and my friend did a 140.6db from memory, 2 old unknown kenwood 12's, 600wrms at 2ohm, 47ish hz 90mm single flared port, loading off the tailgate. With some tinkering should get it a little higher.

[Lunchbox.inc]

I find both of these very impressive

about the best part was the overal simplicity of madd_rass's install... it was very much what i would consider an "amature" install, not in a bad way, but you can tell when someone knows what they're doing, and when someone has just had a red hot go at it! and this was very much the latter, port was almost non existand, maybe 20mm wide, and i'm not even sure how long it was, i seem to think it was just the thickness of the mdf baffle....



(thats the port between the subs there)

i'm hoping Jason doesn't take this the wrong way, simply put i was VERY impressed with it, there was no real logical reason why it would work, but it did, and it got loud, and low too...doing the 141 at around 40hz...

Edited by I♥Miley.inc, 31 October 2011 - 03:59 PM.

[Sorin-Andrei]

I did a 142.3 in the wife's car with a pair of JL 8s and 700w.

[jas13]

should of mentioned i am running 2 x 12" kenwood 3009 on jl audio g1700 at 2ohm.the car mazda 121 hatch like festiva.the box i made was on the small side,just under 110ltrs.(subs up ports up) and facing the hatch.i know the subs and amp are not on the great side.i was happy to start of with a base line of 138 music and 141 burp.the car itself i have stuffed the rear qtrs with blocks of foam and i have removed the roof lining and resealed the 3 braces.i also added another 5 more braces to the roof.today l added more blocks to the tailgate.i removed the inside trim from the tailgate and made an mdf panel in its place.noticed the front doors have more flex in them when i played music.i would like to add dynomat but really cant afford it.if you tap on the qtrs and tailgate they do sound solid.next will be to do the doors , i was thinking of removing the door trim and put a panel of mdf.i have my first comp this weekend and would like to get a better score.does anyone have any tricks to modify the door glass rubber seal as the glass rattles when playing music.do you think that im dreaming to try to achieve such high numbers with low quality stuff?thanks again jas.

[089JAY]

120 something off 800rms.

lower tuning than you though lol

11hz low!!!!

should of mentioned i am running 2 x 12" kenwood 3009 on jl audio g1700 at 2ohm.the car mazda 121 hatch like festiva.the box i made was on the small side,just under 110ltrs.(subs up ports up) and facing the hatch.i know the subs and amp are not on the great side.i was happy to start of with a base line of 138 music and 141 burp.the car itself i have stuffed the rear qtrs with blocks of foam and i have removed the roof lining and resealed the 3 braces.i also added another 5 more braces to the roof.today l added more blocks to the tailgate.i removed the inside trim from the tailgate and made an mdf panel in its place.noticed the front doors have more flex in them when i played music.i would like to add dynomat but really cant afford it.if you tap on the qtrs and tailgate they do sound solid.next will be to do the doors , i was thinking of removing the door trim and put a panel of mdf.i have my first comp this weekend and would like to get a better score.does anyone have any tricks to modify the door glass rubber seal as the glass rattles when playing music.do you think that im dreaming to try to achieve such high numbers with low quality stuff?thanks again jas.

I think I know who you are now... Your the fella with the White 121 Shades at GCCS Southport on the weekend just gone?? If so, who said your box was on the small side?? Almost looked too big for the power you're running...

As a baseline, I was pulling 138.3dB on music at 55hz off 600watts and 1 12inch Pioneer, in a Sedan...

[Drifte.au]

Nice scores there.

My little mazda did a 145.0 @ 25hz off 1200rms, 146.4 @ peak which was 39hz. Works out to 150rms per woofer.

<<< Was a SQ install, setup for flat response.

[Carr]

i had a best of 141db from my old Fusion Powerplant 15 and 4 channel with around 4-500w in my sedan with 2 very small ports. The same combo years before did around 143 on music in my old Lanos hatch and different box.

[jas13]

yep that is me.which car did you have?the box size that im supposed to have according to bbp6 is around the 129 ltr mark after displacment,2 subs and 2 ports,tuned to 28.

[089JAY]

yep that is me.which car did you have?the box size that im supposed to have according to bbp6 is around the 129 ltr mark after displacment,2 subs and 2 ports,tuned to 28.

28hz??? Thats hell low man... I had the Green Pulsar Sedan

[jas13]

ah yes i know who you are.did you find out why the sound was cutting out?are you going to compete this weekend?

Edited by jas13, 01 November 2011 - 06:09 PM.

[barcode]

yep that is me.which car did you have?the box size that im supposed to have according to bbp6 is around the 129 ltr mark after displacment,2 subs and 2 ports,tuned to 28.

im not one to complain about low tuning but god damn!!!!

[alpinesteve]

i've done 150.6db with 2x alpine type s 12's and 2000rms mrpm2000
and 147.9db on 2x alpine type s 12's and 1000rms mrpm1000,

[barcode]

yeah but you still fail cause thats not low power in this thread

[jas13]

ok then,what is the highest recorded on 500-900 wrms.

[089JAY]

ah yes i know who you are.did you find out why the sound was cutting out?are you going to compete this weekend?

Yeah, Head Unit is rocking/jumping/bouncing at around 138dB and causing the CD to skip

i've done 150.6db with 2x alpine type s 12's and 2000rms mrpm2000
and 147.9db on 2x alpine type s 12's and 1000rms mrpm1000,

Speaking of the mrpm1000 Steve, how did it like 1/2ohm?

[Lunchbox.inc]

i believe Alan Dante does around 174db with 750rms...? does that count...? lol

[jas13]

holy crap that car is loud....is that with multiple subs or just the one?i finished the roof tonite,hope to get the doors done tomorrow and friday.does anyone know if this sat comp at option audio is invite or anyone can lob up?either way im going to go to learn and meet.expanda foam is some messy crap.i found a lanzar mono on ebay 1800wrms x 1 at 1ohm.good to run all 4 kenwoods.but are they any good?one fella said that there was a sticker on the base of the amp and it had 1000 wrms x 1 at 1ohm.