Gday

Ive asked this question at 2 different shops and to two different people in each shop and I have got differing answers in each. So Im a little bit confused.

I have a V-net 450 (4x50wrms) amp spare and I want to run my 6x9s with it in two channel mode. This works out to be 110WRMS going into a 50WRMS 6x9.
Is this ok aslong as the gain is right down and I dont have them cranking?

The same guy that told me that running a V12 110WRMS amp on a set of R-type 50WRMS components would be fine, told me that doing the same thing to the 6x9s would blow them up no matter how quiet they were. Is he on crack?

Oh yeah does anyone know how many amps the Alpine V12 T420 draws at full sine wave?

Thanx

There is no such thing as 'too much power' (within reason).

Start at the basics, lets first talk about the speaker power ratings. The speakers power ratings have nothing to do with volume. The RMS rating in theory is the maximum the speaker can take continuously without the voice coil welding itself to the magnet. The max power is the most in theory it can take without hammering itself to death via bottoming out or over excursion and popping out of the frame.

Amplifiers constantly output different amounts of power as music is always a constant changing thing so forget max power ratings for now unless you’re planing on playing sine waves through the system. When it comes to controlling the speakers, the bigger the amp the more control you have. Therefore we always recommend the largest amplifier you can get but remember you must set the gains correctly else you’ll burn your speakers to death when you crank the guts out of it. :)

Hope that makes sense. :)

Thats exactly what I thought, that guy must be on crack.

As for wanting to know the sine wave stuff, I have 2 amps already that can draw a max of 40amps each, and if I add another amp it might trip the circuit breaker (70amp) which means I'll have to spend another $22 when I only got this one three months ago.

Sometimes this circuit breaker will trip for seemingly no reason, I think this may be because the amps can draw 80amps while the breaker is rated to 70....but the strange thing is I can crank it too hell and back and it wont trip but sometimes it will while at normal listening level. BTW There are no shorts and everything is heatshrinked...heatshrunk...heatshrunken??? whatever you call it. Maybe my fly800w amp is causing it...or the curcuit breaker is just faulty, I dunno, dont particularly care cause it has only happened twice.

Im running 4ga at the moment, what size fuse/circuit breaker do you think I should run if the sum of all my amps is 120amps max?

That is the reason why we always recommend fuses over circuit breakers. Circuit breakers tend to snap at their current setting where as fuses can usually let %100-%500 percent of their rating through for a split second burst. :)

Ive decided to just try out the 70amp breaker to see how it goes, I read some data on it and its supposed to trip on one constant minute of 90amps, so I think it might be ok, we'll see. My R-type splits came in today, still waiting on the amp though :mad:.

I've gotta get hold of a jigsaw to make the holes in the doors bigger, aparrently not all 6.5" speakers are the same...the R-types are 3/4" bigger than the sonys.

So with the gain settings...as long as the HU (4v) and the amp (250mv-4v) are set to the same gain level everything should be fine?

Also is there any way to work out bridged power? I have a V-net 450 4 channel 50WRMS amp and Im going to be bridging it to 2 channel (the book says this is fine), I have been told that the resulting power per channel will be 110-130WRMS with slightly more distortion, but not noticable untill extreme volume. Is 110WRMS a good level to expect or will it be different...not that I care but it would be nice to know.

110 would be about right yes.

i wouldnt bridge an amp to run speakers, especially components, as your THD will increase greatly.
that amp from memory is rated at 0.05% thd.
bridging it will probably make it about 0.5% thd.

just something to think about.
some people cant hear the difference, some people can.

Im halfway through doing my upgrades, the doors are off, the seats are out, the console is out and there are 100's of wires everywhere.

I have got the sub and 6x9s wired up in a very rudimentary way just for a test and they sound much better with 50W rather than 110W, they just distort with too much power(THD going up maybe?). At 50WRMS they sound as clear as any speaker Ive ever heard.

Iv got the amp gain set to 4V which is what the HU puts out, I cant wait to get the splits going!

Does anyone know how to get the V12 amps to display the temp and voltage, mine just has the little blue LED.

So tell me what would sound better,
I have an 800watt max amp, 4 x200watt channels, 75 watt rms i think, i have my 12" 600 watt sub bridged over 2 channels. What would sound better, the 1 12" 600watt bridged running at 400 watt or 2 12" 600 watts running at 200 watt each.

So tell me what would sound better,
I have an 800watt max amp, 4 x200watt channels, 75 watt rms i think, i have my 12" 600 watt sub bridged over 2 channels. What would sound better, the 1 12" 600watt bridged running at 400 watt or 2 12" 600 watts running at 200 watt each.


the single sub would b better. more power is being directed to it. i dont c the need for more than 1 sub. i was talking to a local place up here in townsville, john collins. he sells fusion gear mainly and he said that most of the cars that he has fitted sound gear to the installs with the highest dB ratings were ones with only the 1 sub and a really good set of splits. use the money u wouldve spent on a 2nd sub on upgrading ur amp to power ur current sub properly or get a good set of splits etc... he did also say a good reason for having twin subs though. something about u get more whole sounding bass. sorta like adding more speakers, gives a more surround effect. forget his exact reasoning but ohwell. FHRX knows way more so listen to him, but this has just bin wat ive bin told from a local place.

but yeah, more subs/speakers wont make it go any louder, power makes it go louder. so if u want louder, power ur subs/speakers to their ratings.

i disagree i think 2 subs would be better, if you can power the 2 subs enough for them to move correctly then the surface area of 2 subs is obviously superior to the surface area of 1, but this only applies if the subs are being powered enough

i disagree i think 2 subs would be better, if you can power the 2 subs enough for them to move correctly then the surface area of 2 subs is obviously superior to the surface area of 1, but this only applies if the subs are being powered enough


So tell me what would sound better,
I have an 800watt max amp, 4 x200watt channels, 75 watt rms i think, i have my 12" 600 watt sub bridged over 2 channels. What would sound better, the 1 12" 600watt bridged running at 400 watt or 2 12" 600 watts running at 200 watt each.

he did say 1 sub at 400 OR 2 at 200 each. so obviously the 1 will b better

Does anyone know how to get the V12 amps to display the temp and voltage, mine just has the little blue LED.


Not all V12's have the temp/voltage display feature.

sorry read wrong so he will be running 2 subs anyways thats cool. But pumping 200w rms into 2 subs will be better than pumping 400w rms into 1 sub. Well i did have 400w rms pumping into each of my 3 subs lol . Thats what happens when u have 3 V12 MRV 1005s amps bridged to one channel each. They were they days, wen my car had no balls anyways (EA falcon) so the extra 100kg that my car weighed with the stereo equipment didnt matter