SteveW
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Registered: 15th Jul 02
Location: Up in the clouds
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Wheres this ICE GOD thing comming from??? Its like THOR god of thunder etc....
You can have a god of ICE.............
Steve."ICE GOD"
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Chappie
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Registered: 12th Mar 03
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quote:
db is about loudness...u carnt say that a certain increment = twice as loud... without going into details its basically a measurment of air pressure or a resonant value...as sum1 said b4 its a curved line, rectangular hyperbola i think...
Not quite. The decibel is a comparison between two figures, what you're measuring and a reference figure. This reference figure is fixed for SPL (Sound Pressure Level) and is inserted into a logarithmic equation with the actual measurement to give a dB reading.
Sound Pressure Level (SPL) is defined using a reference which is approximately the intensity of a 1000 Hz sinusoid that is just barely audiable and this is therefore stated as being 0dB. Because the equation uses logarithms this fixes what the graph looks like. It is always logarithmic and always looks the same. Therefore, "loudness" can be measured in increments; as follows:
dB------------->Multiplication factor
0--------------->1
+3------------->Root 2
+6------------->2
+20----------->10
+60----------->1000
quote:
The test signal used for the analysis is "pink noise", which has an uniform level across all frequencies. It's similar to FM radio inter-station "hiss".
Pink noise actually contains uniform energy per octave. As the frequency increases the level decreases in frequency bands. This sounds deeper to the human hear, and is much more pleasant to listen to, than white noise which has equal energy at all frequencies and is the FM "hiss".
quote:
A LOT of people don't like the sound of a "perfect" RTA curve, myself included. It's just too flat for me. No bass, and a lot of midrange
This is because the human ear starts to roll off at about 100 Hz and has a resonant peak at around 3/3.5 kHz. Any sound at this frequncy will be amplified slightly by the ear canal unless another sound is masking it.
Hope this helps.
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skinhead
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Registered: 7th Jun 02
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quote:
Originally posted by ultim8DTM5
Nakamichi also make amplifiers, speakers and subwoofers.
Digital Designs (DD) also make amplifers.
btw SQ= Sound Quality whereas SQL=mix of SQ and SPL, normally a SQ system that can hit above 148-150dB.
I beg to differ.....
Most SQ systems cant hit 135Db,
and SQL to me means an SQ setup upfront, with a stupid amount of bass.
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corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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135dB is pish, any half decent system [edited], be it spl or sq, if it has a decent sub and decent amp/amps to drive it can easily hit 135dB.
[Edited on 29-04-2003 by corb]
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skinhead
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Registered: 7th Jun 02
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Ask an IASCA SQ competitor. The SQ cars arent built to hit higher than 135db.
Which is why in the points scoring you get 10 extras points if you can hit over 135
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animality-gt
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Registered: 23rd Jul 02
Location: Dublin,IRELAND
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when its says on an amp "bla bla bla @2 ohms" wat does this mean?i no it cud hav sumtin to do wit channels but i dont no!
and
iv seen amps that say 1000watts max power and amps that say 1000 watts rms,wats the difference?
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animality-gt
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Registered: 23rd Jul 02
Location: Dublin,IRELAND
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when its says on an amp "bla bla bla @2 ohms" wat does this mean?i no it cud hav sumtin to do wit channels but i dont no!
last thing,wats the world recoed for car audio decibels? cos if i got serious inot ice oneday id buy one of those american school buses and fill it with subs and amps
and
iv seen amps that say 1000watts max power and amps that say 1000 watts rms,wats the difference?
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skinhead
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Registered: 7th Jun 02
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Basically, an amp gives power to the speakers. A speaker has a resistance. If the speaker configuration shows a 2ohm load to the amp, it will produce that much power stated.
World reckon is 170 something i think? dunno exactly.
But believe me, it takes £££££ to get anywhere near that high. And its not allways amount of subs, that hit high Dbs. Also, putting them in a massive space, will probably be a waste of time.
RMS & Max Power...:
RMS ratings are universal accross the scale. RMS is a sorta universal way of measuring power of an amp.
Max power is basically a figure which companys make up, so for example an amp which is 300WRMS/1000Watt Max is exactly the same as an amp which is 300WRMS/ 500W Max Power..
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corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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World record:177.6dB (last time i checked) Held by Team BS using 'Treo' subs.
Worlds most powerful production amp(soon to be released) 10 000 RMS
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animality-gt
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Registered: 23rd Jul 02
Location: Dublin,IRELAND
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shittin hell that will be loud! but if its its run in a mono block form wont u need a 10000 watt sub? or am i under the illusion that the sub wattage has to be higher than the amps that is powering it?
one last thing,i no that an rc gives signal to the amps and all that,but wat exactly does rca stand for?
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corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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no, u can run loadsa subs on a single channel.
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animality-gt
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Registered: 23rd Jul 02
Location: Dublin,IRELAND
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ok but tanx that clears that bit up but if u have a amp that is more powerful than the sub your running wont it blo it.(eg. a 1000 watt amp running a 500 watt sub)
im asking all these questions because next year im getin a job (for work experience) with an ice company called ice tronix. and i want to no sum stuff b4 i get there
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corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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no, just keep the gains down, and determin the limit of the sub on those settings, eg. the volume at which it starts to distort, make sure u keep it below that volume.
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animality-gt
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Registered: 23rd Jul 02
Location: Dublin,IRELAND
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ok cheers i was just wonderin.
thats kinda commen sence to turn the volume down when it starts to distort.
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corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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this is the 1000th view of this post, so thought id mention it. 
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SteveW
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Registered: 15th Jul 02
Location: Up in the clouds
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well make that 1001
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AndyW
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Registered: 28th Oct 02
Location: Greater London
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this whole thread was my idea 
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SteveW
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Registered: 15th Jul 02
Location: Up in the clouds
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Yeah but who wrote it??????
ME
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IntaCepta
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Registered: 25th Mar 02
Location: Mill Hill East, Greater London
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but i read it!
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AndyW
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Registered: 28th Oct 02
Location: Greater London
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you wouldn't have wrote it with out the insperation which came from...................................MOI!
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Rob
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Registered: 9th Jul 01
Location: hull
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goodmans make quality stereos check argos for details ;-)
nah sorry I had to post one stupid thing
I think Kenwood headunits are nice
They are well userfriendly and give produce good sound! - quality if on a budget!
rob
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corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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3 Months tomorrow since anyone last posted in here  Thought it was about time i handed down a little information ive found useful
A website on how to fibreglass. Hope some of you find this useful
http://web.njit.edu/%7Ecas1383/glassing/
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PainZ
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Registered: 28th Jun 02
Location: Camberley, Surrey - Drives a Black Vectra VXR Esta
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cord i feel this is a farce!!
we want pics!
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corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
User status: Offline
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SteveW
Member
Registered: 15th Jul 02
Location: Up in the clouds
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well just cos i wanna make this post a little more exciting... heres a picture i made for you all..
^
/^\
l l
/ \
^^^
Its a rocket 
[Edited on 21-01-2004 by snowy]
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