My first car, where do i start?

[DavidN]

that does look good in gloss. hmm doubting now lol

well i have decided on my first vital purchase everybody! and its a good one

a 1600w infinity perfect 12" Subwoofer and a VIBE Slick a7 amp to go with it!

oh yea. Wondering if any one is selling some door speakers? decent ones. think there 16.5cm in the ibiza?

thanks will get pics up when the sub is fitted, promise

 

[Bover]

that does look good in gloss. hmm doubting now lol

well i have decided on my first vital purchase everybody! and its a good one

a 1600w infinity perfect 12" Subwoofer and a VIBE Slick a7 amp to go with it!

oh yea. Wondering if any one is selling some door speakers? decent ones. think there 16.5cm in the ibiza?

thanks will get pics up when the sub is fitted, promise

[Pretty sure the door spears are 13cm diameter, you'll need to check the depth though (with windows wound down)

 

[JacketJ]

Door speakers are 16.5cm and the dash speakers 10cm.

The door speakers can be pretty deep but a tweeter on the front of a full range speaker might hit the cover. Worth getting components and putting the tweeters in the dash, the crossovers should fit where the old dash speakers went too.

 

[DavidN]

well moron who was selling the amp has decided that he is guna relist it because he didn get as much as he wanted for it. will get pic of sub up in two mins.

any one selling a nice 2000w ish amp?

 

[DavidN]

there she is.

lego man is so small lol

 

[Big-Pete]

there she is.

lego man is so small lol

looks like an infinity kappa perfect 12.1 (single voice coil) really high sensitivity so get yourself a nice mono 3/400watt amp on it they dont need 2000wats lol nothing needs 2000wats!

this one
power range: 75-350 watts RMS
they really dont need alot of power to get em moving, i had one, bought it for 20 quid in box
one of the best subs ive owned.

so a 300+ amp @4ohms would be perfect.
a selection available here.
all mono amps so purely to drive 1 subwoofer.
1: one of my personal fav amps

Alpine 350RMS
2 a JBL amp

3 a7 vibe



the difference between the A7 and Alpine is 100wats. @4ohms.

out of all of them the JBL is the most powerful, BUT as far as i can tell is a class A/B amp and wont be as efficient , so most probably your looking at about 100watt drop over the class d(alpine and A7)

there are loads of amp choices BUT my money would be on the alpine.

awesome amp, really small but happily pound that infinity around all day, not get as hot being a class d and having circuitry that works. and a piece of piss to setup!



just btw
specs for the A7
Max Power @ 1ohm: 1 x 1300W
RMS output @ 1ohm: 1 x 750W
RMS output @ 2ohm: 1 x 600W
RMS output @ 4ohm: 1 x 300W

bare in mind your infinity is a 4ohm sub.
IF I needed a new amp i could wire the sub to 1ohm and use the potential of the amp, theres no point having 1300wats and only be able to use 300.



oh heres a pic of my Type R 12" with a Panasonic AA battery at the top. dont hate its just an old sub i have sitting here! its just wired down to 2 ohm atm

 

[CraigW]

You dont go with the watt rating of an amp/sub. You use the RMS rating of the sub and buy an amp that has the same rating. Then wire it up accordingly dependant on if you want it at 2 or 4 ohm.

When I got my sub (Audiobahn) I bought a cheap amp to power it at the same time, yes it worked well for the time I used it. After a year or so I managed to pick up and Audiobahn mono amp that is matched RMS-wise to the sub and it is so much better. Can handle anything that is thrown at it and tbh it is much much punchier.

 

[DavidN]

got specs wrong it peak power is 1400w.

so what your saying then, is that to get maximum power out the thing i only need an amp that matches its rms, which is 350rms.?

that a 350w amp would get the full 1400w out of it at max volume?

 

[Big-Pete]

got specs wrong it peak power is 1400w.

so what your saying then, is that to get maximum power out the thing i only need an amp that matches its rms, which is 350rms.?

that a 350w amp would get the full 1400w out of it at max volume?

MAX POWER IS A BULLSHIT NUMBER MADE UP BY THE COMPANYS FOR HYPE!

[all caps rage/]

350w amp will do fine, i tested sony Xplods @ there rated 350w rms and at 1500RMS (peak)( i tested with a 350rms amp and a 1500rms amp the diffrence was 1.49DB which is bugger all!

just buy that alpine amp and be done with it!

 

[DavidN]

right ok, understand now. thanks pete.
well i have spoted a lush 600w amp which will do plenty for me.

its retail is 400ish, it one year old and its been sold for 50quid

not saying where cos any one who knew ould buy it, so im guna get my hands on that.

a mate of mine ran two kappa 12.1s off it and bridged it to 1ohms.

that killed the subs eventually like, but shows thqat it can hack my single sub.

pete can you explain what relevance ohms has to rms, and peak power?

thanks alot i want to learn this stuff

 

[CraigW]

350w amp will do fine, i tested sony Xplods @ there rated 350w rms and at 1500RMS (peak)( i tested with a 350rms amp and a 1500rms amp the diffrence was 1.49DB which is bugger all!

just buy that alpine amp and be done with it!

But you have to remember with decibels for every one it increases it is like double each time. It doesnt work on a 1 to 1 scale.

 

[Big-Pete]

right ok, understand now. thanks pete.
well i have spoted a lush 600w amp which will do plenty for me.

its retail is 400ish, it one year old and its been sold for 50quid

not saying where cos any one who knew ould buy it, so im guna get my hands on that.

a mate of mine ran two kappa 12.1s off it and bridged it to 1ohms.

that killed the subs eventually like, but shows thqat it can hack my single sub.

pete can you explain what relevance ohms has to rms, and peak power?

thanks alot i want to learn this stuff

12.1s can ONLY run 4ohms
simple terms?

ohms=petrol (very specific petrol)

ok lets take for example your car only runs on 1specific type of petrol and if you put the wrong one in your car you might of aswell filled the tank with mustard.

8ohms - 90ron normal boggo tescos unleaded
4 ohms = 95 less restricteve and runs better
2 ohms = Super unleaded ie 100ron
1ohms = rocket fuel.

the smaller the number, the power increase is about 2x(IIRC) is 300W-RMS @8ohms= 600W-RMS on 4, BUT thats only if everything is A)wired correctly, B)compatible.

subs can only run "normally" @ a single Ohm rating ie if i have a kappa it will run at 4 ohms, if i put it on a 1ohm amp its like quadrupling the power, and you will end up melting the voice coil inside it.

BUT some subs have 2 voice coils like my type r

please note the 4 speaker wire terminals

these are a bit more complicated BUT its easy when you think bout it. OK so I have a sub with 2 voice coils @4 ohms each (that means both voice coils are 4 ohms)

good so far yes?

heres the tricky bit,

When you have 2 voice coils on 1 sub you have to wire them together either in serial OR in paralel
the difference between the two means that 1 way you half the ohms and 1 way you double it.

Option 1 (parallel) = 2 ohm load
Voice coils wired in parallel
Recommended Amplifier: Stable at 2 or 1 ohm mono

Option 2 (series) = 8 ohm load
Voice coils wired in series
Recommended Amplifier: Stable at 4, 2, or 1 ohm mono

the way that type R above is wired is @2ohms.

simples?

so in simple terms IF you run that Kappa @ 1 ohm you will melt it, OR you buy a sub that's compatible with the amp and vice versa.

id recommend a 12" type R if you have 600W-RMS @2ohms available

 

[DavidN]

kinda understand that

thank you!

now i just need to understand why people selling amp wiring kits only put in one length of speaker cable at 5m, no matter how short my wheel base is that aint reaching my doors!!

 

[DavidN]

btw ive started a new thread

major disaster with the ibiza!!!