GeForce Audio System Update

[geforce]

//youtu.be/http://www.youtube.com/watch?v=K5uwiiG6Cwc&rel=1

this is the result of mine creativity , JBL are JBL

Low deep bass , cheap , better sensivity , XMax is great , less power handling with big volume

[scorpion80]

very well done !!! nicely tuned ...

i still didnt get any woofer till now ... as i have a plan to switch to shallow series ....

as now me in karachi so will do it soon ... but my amp burnt due to rain water ...

MASHALLAH u r very smart in tuning ur box !!!

[geforce]

oh man , you blew ur amplifier
that kenwood??

[scorpion80]

no not kenwood ...

presence 4 ch..

[geforce]

My Sound System Ingredients :

Head Unit :
Pioneer Deh 4950mp

Amplifier :
Evolution USA 4 CH amplifier

SubWoofer :
Jbl GTO 1202d

Speakers :
Jbl GTO 936e

Tweeters : Some
local Pioneer tweeter
(300rs walay some thing like that)

Here are some photos

HEAD UNIT : 3 Rca Out *Sub control * , 2.2V Pre volts , Parametric Equilizer

Amplifier : 30 X 3 Fuse Rating , HPF , LPF , Sub Sonic Filter , PREVOLTS 6v ~ 0.1v , 4 channel , 300Wrms (capable of running from 300Wrms sub to 500Wrms sub )

Speakers : JBL GTO 936e 6"x9" , 100Wrms , 300Wpeak , Sensivity 97db

Sub-Woofer + Enclosure : JBL GTO 1202d , 300Wrms , 1200W Peak , Sensivity 93db , Xmax 12.5mm , FS : 23.50hz : Enclosure 0.75" thickness , Internal volume 2.779 cuft , Tunning frequency 42 hz , Light Foam filling , Port Dia 3.5" , Port length 2", Shape Polygon

Demo will be avaliable soon
with current Setup , you may not hear clear base notes , because my mp4 player is poor in recording video

[smartboy_am]

nice setup dude........nice amp............

[geforce]

its really powerful man , its amazing , i will be always thanks to Maggi , he is the guy who let me introduce this amplifier , such a nice amplifier ,
A small compact size amplifier ,
great heat sink design ,
Great cross over , what i needed according to enerlevel
is sub sonic filter , he let me bought in very cheap prices
it was something like 11K @ pioneer aisha munzil 4 months ago , but he helped me in bargaining in K`s , not only 1k ,
just waiting for my car to get back , then finally install it ,
one thing is remaining , is to get tunned it by enerlevel

[geforce]

here are some other photos at the time of buying + a treat for maggi

so as we can see how maggi is snatching the chicken in hunger LOLZ , BUT BIRYAN WAS EXCELLENT

NOW WHAT THE HECK IS THIS?????

64 Voltage on 60hz track full gain clipped signal

60.1 Voltage on 60hz track full gain clipped signal

NOW AS I KNOW THAT EXCEDING ABOVE 75 % of GAIN distortion starts

SO 60 X 0.75=45 Volts

where 45 voltage means above 500 Wrms

BUT CLASS AB AMPLIFIER 500W X 60% EFFICIENT=300 true rms on HEATED AMPLIFIER

HEAD UNIT EQ FLAT , EVER ENCHANCEMENT OF , 75% VOLUME , 50HZ TRACK (60V) FULL GAIN

45v 75 % GAIN , BASS BOOST OFF

[spiled]

gforce nice system, and great to see this types of systems in mehran

really great work

[geforce]

@ ALL GUYS CHECK OUT THE POWER OF THIS AMPLIFIER , IF YOU THINK THIS STUFF IS BETTER OTHER AMPLIFIER , AND I CAN BET YOU , IN SAME PRICE OF THIS AMPLIFIER YOU CANT GET POWER AMPLIFIER LIKE THIS

EVOLUTION USA a true 300wrms amplifier ( Fuse rating 30 X 3 )

PICTURE 1 SHOWS , 60.1 VOLTAGE

USING 50HZ TEST TONE , GAIN 100% ON , BASS BOOST OFF , LPF IN BETWEEN 40HZ TO 250HZ (SELECTION MUST BE OVER 70HZ ON CROSS OVER OF AMPLIFIER )

60.1V , IS COMPLETELY CLIPPED SIGNAL

REDUCING GAIN , WHERE CLIPPING DOESNT BEGIN , HENCE A CLEAN SIGNAL (IT WAS SHOWED BY STEVE MEADE WHEN HE SET GAIN
( PEAK VOLTAGE X 75 %
) WE GET UNCLIPPED SIGNAL SO PEAK IS
60 x 0.75=45V

HITTING : 45v IS UNCLIPPED SIGNAL

THE PROCEDURE , HOW ITS DONE ( CLICK TO SEE CLEAR AND ENLARGE )

ON SAME BASIS I DID THAT (SO I GOT 45v ON CLEAN SIGNAL (UNCLIPPED))

COMPLETE CHART (CLICK)

[geforce]

//youtu.be/http://www.youtube.com/watch?v=xSUuBBJQ4Wk&rel=1

AS you can see , he got 50V in clipped signal , @ full gain

when he reduced to 25% that means

75% of peak volts , 37.5v he got clean signal

50V Peak voltage X 0.75=37.5v is the clean signal ,

so if i get , 60peak voltage ,

60 x 0.75=45v is the clean signal

right??? got it ppl

[smartboy_am]

@geforce: yar qasam khuda ki tera bas ab amp ke andar ghus kar bethna rehgaya hai ,iske ilawa tu sb kuch kar chuka hai.......lolx.kheriat gari kahan gayi tmhari jo system nkala wa hai........yar zara mere oxygen audio ki rms pata karke btao mjhe.........topic ka nam change krdia?

[smartboy_am]

@geforce: yar qasam khuda ki tera bas ab amp ke andar ghus kar bethna rehgaya hai ,iske ilawa tu sb kuch kar chuka hai.......lolx.kheriat gari kahan gayi tmhari jo system nkala wa hai........yar zara mere oxygen audio ki rms pata karke btao mjhe.........topic ka nam change krdia?

[geforce]

25 x 2 fuse rating ??? oxygen amplifier ?
so
25A bridges right
Power=voltage x current
p= 12 x 25
Power=300W
but class ab are 60 % efficient
so 300 X 0.60
180 Wrms power provided on 400Wrms sub
your ampifier is 90wrms X 4ch
180Wrms @ bridge

gari bannay gayi hui , engine ka kaam tha , abhi janay wala houn , dhakenay

[smartboy_am]

@geforce: yar iski fuse ration 30*2 hai...

[geforce]

so ,
P= 12 x 30
=360 x 0.60
= 216 Wrms
108Wrms per channel
216wrms on bridge

[geforce]

Progress : Some modification to Enclosure , to get SQ ,filling foam inside enclosure provides good , and enchange sq to low end , deep bass , Port boxes distorts as well they also generate port noise , foam also reduces dostortion of a box

According to my friend "use of foam helps reducing "BACK WAVE " cone pushes air from back of cone too. foam absorbs the wave and don't let it reflect . thus making sound much cleaner and less boomy"

[geforce]

Ener level needs your help only

[963]

gr8 work

the foam has increased the bass or not

[geforce]

bass quality is imporved , but lowered in Decibels
thats why i remove only sides in enclosure
now i will test in the evening