sub wiring advice - Saxperience

RyanSaxo · 17th May 2010, 19:54

i asked this question a while ago and got some good responses...

but i'm still not convinced i have wired my sub correctly.

so.... here goes.

amp:

FLI Loaded 450s Amplifier 2 Channel

4 ohm stereo : 2 x 100 watts RMS
2 ohm stereo : 2 x 115 watts RMS
4 ohm mono : 1 x 225 watts RMS
2 ohm mono : N/A
Max power : 450 watts
Frequency response : 20Hz – 20KHZ
SNR : 90dB
THD : 0.2%
Bass boost : 0 – 12dB
HPF : 45hz – 300Hz
LPF : 45Hz – 300Hz

Note: Single Sub with Dual Voice Coil, hence 2 sets of connections for one sub.

Sub:

DB Audio Raptor12 DVC

# 1100W RMS 12" Dual Voice Coil Subwoofer
# Textured Injection Molded Poly Cone
# 2" 4 Layer KAPTON Voice Coil
# Custom CONEX spider
# Chrome basket
# bumped and vented back plate
# magnet size 11" wide
# magnet size 5" 3/4'
# Recommend enclosure:

* Seal: 1.1 cu.ft @ 48Hz, 1.5 cu.ft @ 44Hz
* Vented: 1.5 cu.ft @ 37 Hz

It is in a sealed sub box.

currently it is wired up like this:

it is quite loud... on about halfway gain i think?

but when i had it on loud recently, the sub stopped working, the amp wasn't on... i thought i had blown it blah blah.
but when i turned it on 30mins later it worked fine...

i know there is alot of problems to do with the ohm's being correct etc.

i'm also only using half the amp by the looks of things? should i be using the other channel?

can anyone show me the best way to wire it up on the image below?

and am i getting the best from the speaker with that amp? i suspect not.

thanks for any help or advice guys!

RyanSaxo · 17th May 2010, 19:55

suger wrong section

how did i manage that?

MODDDS

save me

marcusd · 17th May 2010, 19:58

how mine is not same brand tho

and wrong wrong wrong section

kill_switch · 17th May 2010, 20:01

if your amp aint on then check ur earth lead rem and power

Mikol · 17th May 2010, 21:35

marcusd's diagram is win.

Your amp will be angry at you for wiring it the way you have.

RyanSaxo · 18th May 2010, 09:53

but i only have one set of connections on the sub box...?

do you appreciate it is one sub with dual connections? or have i been unclear and lead you to belive it is two subs?

Mark51^p · 18th May 2010, 11:23

Moved.

davidandrews5343 · 18th May 2010, 11:27

Quote:

Originally Posted by RyanSaxo

but i only have one set of connections on the sub box...?

do you appreciate it is one sub with dual connections? or have i been unclear and lead you to belive it is two subs?

One sub with dual connectors?? I think u need to get real pics up, as the one u posted shows two subs with two inputs

RyanSaxo · 18th May 2010, 14:20

it was the only picture on the web i could find.

the speaker has 2 connections due to it being dual coil.

just want to know how to wire them to get the correct ohm's etc.

RyanSaxo · 18th May 2010, 14:26

on here:

http://www.bcae1.com/spkrmlti.htm

halfway down, the way i have wired it...

"This image shows the DVC driver with both voice coils wired in parallel. This presents a 2 ohm mono load to the amplifier which may damage most amplifiers. "

does this mean i'm asking for trouble with my amp?

hense it maybe turning off that time?

how would anyone suggest it be wired?

RyanSaxo · 19th May 2010, 09:22

bumpo. any clever clogs know what they're talking about?

i'm wondering if i need to source a new amp to make the most of this...

hmmmmm

jdr · 19th May 2010, 11:46

thanks for this man, this helped me get to 2ohms

marcusd · 19th May 2010, 12:58

the link you posted is useless then as the link shows 1 amp ans again 2 subs.
surely if u have 1 amp and 1 sub you wire it like normal + to + - to - and it will work. as for it cutting out could be rubbish ground or it getting too hot or it could be faulty.
actual pics would help or try explaining a bit better

chinkostu · 19th May 2010, 13:25

wire it up with one channel to each set of connectors. its all to do with impendance, you may be overloading the amp as it'll be at, 2ohms? but in mono, as its on one channel!

lukee_VTR · 19th May 2010, 13:48

if you have one sub with dual connections, you just simply use all four connections to 2x + and 2x - on your amp.

Also a 450w amp is really not ideal for a 1100W sub. The RMS on the amp will probably only be 300w so its under spec'd mate.

tokyodrifte · 19th May 2010, 14:58

That amp will die one day regardless of how you wire it

lukee_VTR · 19th May 2010, 15:34

Quote:

Originally Posted by tokyodrifte

That amp will die one day regardless of how you wire it

indeed

coalpoolwalla · 19th May 2010, 15:40

http://a248.e.akamai.net/pix.crutchf..._2-ohm_2ch.jpg

but whats the sub?
dual 4ohm or dual 2ohm??

but look at the top of the pic anyway "one 2ohm DVC sub, bridged 2 channel amp:4ohm load" so your amp should survive anyway

RyanSaxo · 19th May 2010, 19:36

Quote:

Originally Posted by coalpoolwalla

http://a248.e.akamai.net/pix.crutchf..._2-ohm_2ch.jpg

but whats the sub?
dual 4ohm or dual 2ohm??

but look at the top of the pic anyway "one 2ohm DVC sub, bridged 2 channel amp:4ohm load" so your amp should survive anyway

i dont know what the sub is.... guess it doesnt matter?

but the amp spec say's n/a against 2 ohm mono? which i belive is how i wired it.

your above image however shows it to be 2ohm at the sub but 4ohm at the amp.... much more ideal

i think that could be the solution then??

the amp isn't faulty, used it for years without a dvc sub, and the wiring is fine.... think the reason it cut out could be to do with the ohm's being too low for the amp!

saxojh · 21st May 2010, 09:17

Your first wiring diagram was correct assuming the sub is dvc dual 4 ohm. If its dual 2 ohm. The way you are wiring it will be 1 ohm and it will be damaging the amp. Running a sub at 2 ohms when your amp spec says it can handle 2 ohms is really not a problem. The only probelm with your top wiring diagram is that the negative isnt bridged. What you need to do is move the negative across to the other channel. + from 1 channel through the coils and back through the negative on the other channel.

Jason