Bought a few bits

[Colin Wiltshire]

After reading what Darren (Pugme) is doing, I've decided to act on what I've been thinking about for ages.

Planning on a 3 sub boot install, with 2 on show as you look from the back looking into the boot. The other would be either facing the back seat or facing up towards the parcel shelf, (thoughts on direction please)

62411 these being the mono amps 1200watts x2

62412this being the hidden 3000wat sub with hidden matched amp

62413The subs on show 1200watts x2

[v6 galant]

Hi.
It will sound nice and deep but make sure you use lots of sound dreading stuff .

Had a car with 2x 15"16,000 watts changed to 1x 18" 2,000 watts that was all in a metro city / mg turbo look a like that was so so deep like most of build .

Then changed to a cavelier car with 4 x 10" in with over 3,000 watts in a home made box and use to make boxs for my mates too and make sure do all the rattle tests
Wear ear plugs
Had about 20 cars + so far all with sound systems in

[Pugme]

If there 3 12's im guessing ull be running enclosed boxes and not ported as ported need a lot more volume.


But yeah man, sounds like a good start, iv just fitted all mine back in for the weekend, gutted the fronts arent ready, but theres no rush with mine. Deadening the boot is easy, iv not even opened the boot panels up yet.

Have a search on talkaudio, a guy called "loudboy" sells sdeadening for decent prices and quality stuff.

[Colin Wiltshire]

I have already cover'd the whole boot in sound deadening.
The 2 visible subs will in a sealed box, but the hidden 1, thinking about having a ported box for that 1. I do have a wired volume control for this 1, so can turn it up or down as desired.

[Colin Wiltshire]

1x 18" 2,000 watts that was all in a metro city / mg turbo look a like that was so so deep like most of build .



18" sub in a metro?:shocked:

[v6 galant]

It had 2x 6x9 3ways in the back too + 2x 6.5 " 2ways in front 6x 1" tweet 3 amps running it all .

that's was the old days over 20 years ago now .

4x had to change the glass

My mates use to say why dont you do car show but never did
it use to so much that i had to love it .
the Back end hach use to blow out had to keep putting glass in love deep sub .....

[Colin Wiltshire]

Awesome Bass/woot2 But 4 rear windows?/JawDroppi

[v6 galant]

Yer use to keep turning it up when I like the track ...... lol

[Nick Mann]

I don't understand how music power is measured. I understand RMS. I understand power is voltage multiplied by current. I can't reconcile that knowledge with stated power figures.

If you are running 2 x 1200W RMS amps and a 3000W RMS amp then you have a total amplifier output of 5,400 Watts. Assuming that the amplifiers are 100% efficient (they can't be - they get hot) then to deliver 5,400 Watts they must use 5,400 Watts (or in reality more).

At 12 volts, you would need 450 Amps to get that amount of power. That would require 4 cold spec alternators to keep up with, plus a seriously thick cable to cope with the current, my simple electricians brain says the cable would need to be in the region of 50 square mm to achieve 90% of the battery voltage at the amplifier if it was sited in the boot. It would completely drain an average good condition battery from fully charged to completely dead in 8 minutes.

Is all that right? Do you guys have that much of a problem with the electrical side of things?

[v6 galant]

I don't understand my simple electricians brain says the cable would need to be in the region of 50 square mm to achieve 90% of the battery voltage at the amplifier if it was sited in the boot. It would completely drain an average good condition battery from fully charged to completely dead in 8 minutes.

Is all that right? Do you guys have that much of a problem with the electrical side of things?

I no someone was going to give me the understanding
And working it out
Yes your right mine was dead in 5mim's a time
1. i used armed cable for power 4 core from work
2. I had to put in 6x 6" fan's from a computer room cooling tower's the 6foot ones at 240v
3. I worked with electrican 's so was Abel to get the parts I wanted
4. Car had to be running all the time with the system on
5. You could have the light's on full beem and it would cutout had to rev all the time when I had light's on
6. There was a batter way but did not do it
7. The Alton was up rated to a one off 150amp
All home made
The sub's were in house subs in a box I made As I was only 17 years old at the time and was just seeing if it would work all this on a metro

[Pugme]

Im awaiting the deliver of a 5000amp battery as im running 5000w rms from 5 amps and once I get the air con out ill be filling it with its own 210amp alternator, but even then ill not get much play with the engine off! Lol

[WOODY72]

???????????My ears can only just put up with a normal car radio turned up high?????????????? :speechles

[Pugme]

Lol, its different with an audio install.

Standard audio turned up will distort and sound terrible, a properly install turned up should have clarity throughout the sound range, mine wont run at full whack all the time, half the speakers are only there for "attention seeking" at shows :)

[Colin Wiltshire]

If you are running 2 x 1200W RMS amps and a 3000W RMS amp then you have a total amplifier output of 5,400 Watts. Assuming that the amplifiers are 100% efficient (they can't be - they get hot) then to deliver 5,400 Watts they must use 5,400 Watts (or in reality more).


That is peak power, rms should be half to a 3rd of those numbers.

[gazmk2]

RMS = root mean squared and is the peak figure times 0.707, or at least it is when applied to voltage! It's been a few years since I worked with electrics!

[Nick Mann]

Sometimes music power is measured from the negative max to the positive max which instantly doubles the value. 0.707 is right if you have a nice curve and you measure the peak from the zero line.

[Colin Wiltshire]

Is there any difference between mounting a sub facing into the box to facing out as normal? Or is it just preference on the look?

[darren1976]

is it sealed or ported box

[Colin Wiltshire]

Haven't made any boxes yet, just interested if there was any difference, apart from visual.

[darren1976]

Yes there is I would go with in box less hassle to be honest unless you have audio bahn sub and looks pretty etc