Subwoofers not working.

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Discussion

Brandonflowers123

Original Poster:

243 posts

93 months

Thursday 29th September 2016
quotequote all
I've realised my subs are not working.

I have a pioneer deh - 6300sd.

Manual says amplifyer is not required.

The subs seem to be connected by aux cables from the back of the stereo.

I've checked all wiring, checked settings, but nothing works.

Any idea? Or where can I go?

AdamIndy

1,661 posts

104 months

Thursday 29th September 2016
quotequote all
The cables going to the head unit will be plugged into the pre-outs on the back. The other end should be plugged into a separate amp. If the sub/s are "active" it will have its own amp, if they aren't they will/should be plugged into a separate amp.

Edited to add, I don't know of any headunit with enough grunt to run a sub. Any half decent sub will need upwards of 200W RMS. most head units will PEAK at 40-50w max so probably 20-30W RMS.

Edited by AdamIndy on Thursday 29th September 17:10

ambuletz

10,727 posts

181 months

Thursday 29th September 2016
quotequote all
most headunits are around 50w aren't they? can't imagine that will make for much of a powerful subwoofer... (especially when its powering other speakers too)

Brandonflowers123

Original Poster:

243 posts

93 months

Thursday 29th September 2016
quotequote all
Nanook said:
You probably do need an amplifier. Got a screenshot of this page in the manual?
I'll quote the book

"This unit is fitted with subwoofer output which can be turned on or off"

Brandonflowers123

Original Poster:

243 posts

93 months

Thursday 29th September 2016
quotequote all
AdamIndy said:
The cables going to the head unit will be plugged into the pre-outs on the back. The other end should be plugged into a separate amp. If the sub/s are "active" it will have its own amp, if they aren't they will/should be plugged into a separate amp.

Edited to add, I don't know of any headunit with enough grunt to run a sub. Any half decent sub will need upwards of 200W RMS. most head units will PEAK at 40-50w max so probably 20-30W RMS.

Edited by AdamIndy on Thursday 29th September 17:10
So what should I do? The outputs from the back of the head unit, should he connect to an amp, and wires should be connected to the subs?

Brandonflowers123

Original Poster:

243 posts

93 months

Thursday 29th September 2016
quotequote all
ambuletz said:
most headunits are around 50w aren't they? can't imagine that will make for much of a powerful subwoofer... (especially when its powering other speakers too)
Yeah it's 50w X 4. That's what it says on the head unit

Don't know what that means? That's why I thought it has enough power.

AdamIndy

1,661 posts

104 months

Thursday 29th September 2016
quotequote all
The subwoofer out just means it has the ability to control a sub, not to power it.

Depending if you have a separate amp and sub set up or an active sub will determine your next move.

If you will be using a separate amp/sub set up, you will need to run a power cable direct from the battery to the amp, the pre out as mentioned above, a signal wire from the head unit to the amp(to switch the amp on) and 2 wires to the sub itself.

If it is an active sub, you will still need the power cable from the battery, switch to the head unit and the pre out cables to the head unit.

A sub pulls ALOT of power, my old set up was north of 80amps.

Brandonflowers123

Original Poster:

243 posts

93 months

Thursday 29th September 2016
quotequote all
DELETED: Comment made by a member who's account has been deleted.



I've got my subs in the boot, not case. And power wires and auxiliary wire fed to the boot.

Lool home cinema,

Brandonflowers123

Original Poster:

243 posts

93 months

Thursday 29th September 2016
quotequote all
AdamIndy said:
The subwoofer out just means it has the ability to control a sub, not to power it.

Depending if you have a separate amp and sub set up or an active sub will determine your next move.

If you will be using a separate amp/sub set up, you will need to run a power cable direct from the battery to the amp, the pre out as mentioned above, a signal wire from the head unit to the amp(to switch the amp on) and 2 wires to the sub itself.

If it is an active sub, you will still need the power cable from the battery, switch to the head unit and the pre out cables to the head unit.

A sub pulls ALOT of power, my old set up was north of 80amps.


There are power wires connected, which you can't see, and the blue wires are the auxiliary cables

I'm not sure if it's active

ambuletz

10,727 posts

181 months

Thursday 29th September 2016
quotequote all
The photo is too blurry to make out whats going on, take some better ones, especially of the sub/amp and whatever is currently connected to it (and what needs to be).


I can't really tell properly from your photo but I am assuming those blue wires are going to your normal speakers? in which case most speakers will have 2 wires going into them.

I had an active subwoofer in my car and the wires consisted of.

- RCAs going from the headunit to the sub
- live wire from the battery to the subwoofer/amp.
- ground going from the sub to part of the chassis.

AdamIndy

1,661 posts

104 months

Thursday 29th September 2016
quotequote all
Brandonflowers123 said:


There are power wires connected, which you can't see, and the blue wires are the auxiliary cables

I'm not sure if it's active
That's is the wiring for an amp. Which is useful. Now on your sub(s), what connections are on the back/side of the box? There will either be 2 screw down pole type connectors or a full amp. If has an amp, it is an active sub.

Dr Doofenshmirtz

15,220 posts

200 months

Friday 30th September 2016
quotequote all
I suspect, when the OP says 'subs' he means the speakers on the parcel shelf?

Is this the back of your Pioneer OP?


The speakers you have taken a blurry photo of would typically plug into the socket next to the red 10 amp fuse on the left (via an ISO adapter or something).
This means the speakers are using the head units internal amplifier.
If you want it louder, then you'll need a separate amplifier. The amp will connect to the photo sockets on the right (the top pair marked R = rear) and then the speakers will connect to the amp, not the head unit.
If you want more bass, then you'll need a dedicated subwoofer enclosure and amp. This amp will connect to the phono sockets marked S = sub)
The phono sockets marked F are of course for a front amp/speaker pair.

The S phono sockets will most likely have a low pass filter, so you'll only get bass frequencies, unlike the F and R outputs which will be full range.
If you do add a bass amp/enclosure, then remember to enable the high pass filter on the F and R outputs - this means the speakers in the car only need to deal with mid and high range frequencies, leaving all the bass frequency jobs to the sub woofer. This will mean more volume, and less distortion.

Brandonflowers123

Original Poster:

243 posts

93 months

Friday 30th September 2016
quotequote all
ambuletz said:
The photo is too blurry to make out whats going on, take some better ones, especially of the sub/amp and whatever is currently connected to it (and what needs to be).


I can't really tell properly from your photo but I am assuming those blue wires are going to your normal speakers? in which case most speakers will have 2 wires going into them.

I had an active subwoofer in my car and the wires consisted of.

- RCAs going from the headunit to the sub
- live wire from the battery to the subwoofer/amp.
- ground going from the sub to part of the chassis.





Here are better pictures.

Brandonflowers123

Original Poster:

243 posts

93 months

Friday 30th September 2016
quotequote all
Dr Doofenshmirtz said:
I suspect, when the OP says 'subs' he means the speakers on the parcel shelf?

Is this the back of your Pioneer OP?


The speakers you have taken a blurry photo of would typically plug into the socket next to the red 10 amp fuse on the left (via an ISO adapter or something).
This means the speakers are using the head units internal amplifier.
If you want it louder, then you'll need a separate amplifier. The amp will connect to the photo sockets on the right (the top pair marked R = rear) and then the speakers will connect to the amp, not the head unit.
If you want more bass, then you'll need a dedicated subwoofer enclosure and amp. This amp will connect to the phono sockets marked S = sub)
The phono sockets marked F are of course for a front amp/speaker pair.

The S phono sockets will most likely have a low pass filter, so you'll only get bass frequencies, unlike the F and R outputs which will be full range.
If you do add a bass amp/enclosure, then remember to enable the high pass filter on the F and R outputs - this means the speakers in the car only need to deal with mid and high range frequencies, leaving all the bass frequency jobs to the sub woofer. This will mean more volume, and less distortion.
I've uploaded better pictures, yes speakers on the back shelf.

I have those two speakers connected, with the two top outputs, but they don't even turn on or work.

Brandonflowers123

Original Poster:

243 posts

93 months

Friday 30th September 2016
quotequote all
AdamIndy said:
Brandonflowers123 said:


There are power wires connected, which you can't see, and the blue wires are the auxiliary cables

I'm not sure if it's active
That's is the wiring for an amp. Which is useful. Now on your sub(s), what connections are on the back/side of the box? There will either be 2 screw down pole type connectors or a full amp. If has an amp, it is an active sub.
I've taken better pictures for you to see.

Dr Doofenshmirtz

15,220 posts

200 months

Monday 3rd October 2016
quotequote all
You've done it wrong chap...
Those are low level output 'pre-amp' phono leads intended to plug into an amplifier.

If you don't have an external amplifier or don't intend to fit one - then you must connect the speakers to the ISO lead that plugs into the large socket next to the red 10 amp fuse on the back of the head unit.
If you buy an ISO adapter for your car...then you can just plug and play using the cars existing speaker wiring...no need to run new cables at all. What make, model and year car is it?

Failing that - got any mates who know what they're doing that can help you?



Edited by Dr Doofenshmirtz on Monday 3rd October 09:29