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Audi A5 - Subwoofer Upgrade  

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V6Thomas
(@v6thomas)
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Joined: 12 months ago
Posts: 17
19/04/2020 12:17 pm  

Hello Gents,

I have  Audi A5 and the Subwoofer is absolutely appalling and needs replacing.

Currently this is the subwoofer that is installed. Its using my interior as a IB system as the magnet of the subwoofer faces up into the cabin.

 

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So as I have discussed with Toid, We can fit any 10 inch subwoofer into that shelf magnet into the boot.

The cars boot is 465 Liters of Air according to the book.

Im not looking for crazy bass just this sub seems to make horrible noises on certan tracks.

I was planning on just sticking a 10 inch sub into it magnet down into the boot and using a amp to boost the signal from the existing subwoofer connections.

 

Some people have done this

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12323

 

As you can see he fitted a 10 inch fine and matted it out.

 

Toid told me 

 

"You have sound waves coming both on the front and rear of the subwoofer. Most people don't think of it like that, but typically you're going to get better sound with it firing up into the cabin versus firing into the Trunk. So the way it's mounted right now, isn't ideal."

 

Also that high Xmax and low FS and a good QTS would be ideal.

 

"Add in the fact that your trunk isn't really a full infinite baffle. It's just a big sealed box helps as well"

Other comments 

 

"It is. It is still considered an infinite baffle. But what I'm talking about is like putting a subwoofer on the other side of a wall and using the rest of your house as the box. That would take a little bit more then the particular case that you're using it in. X max is just the amount of movement the cone can move from the voice coil. So it has oh really generous amount of movement, which is needed when you don't have the compression of the box"

 

Toid reccomended a few subs but there in the usa.

 

I can only buy them from UK sites. such as http://www.caraudiocentre.co.uk ebay.co.uk and caraudiodirect.co.uk or anything like that.

 

Please can somone reccomend me a subwoofer? and a Amp?

 

Thanks for your time!

 

 

 


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123Toid
(@123toid)
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20/04/2020 12:53 am  

It looks like Ground Zero's titanium sub woofers are designed for free air operation.  It also looks liek this would work as well: http://www.caraudiodirect.co.uk/subwoofers/10-inch-subs-25cm/ground-zero-iridium-gziw-10spl-subwoofer-10-inch-700w-dvc-2-ohms   I have not simulated it yet, but can if you have any interest in it. I don't know anything about this brand, so I have no idea how honest their numbers are. Are you not able to buy from sound imports?


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123Toid
(@123toid)
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20/04/2020 12:57 am  

This JL Audio also looks like a good candidate. http://www.caraudiodirect.co.uk/jl-audio-10w0v3-4-300w-10-25cm-subwoofer-bass-driver


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123Toid
(@123toid)
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20/04/2020 1:04 am  

You are typically looking for a subwoofer that can handle a lot of RMS power, high excursion and a high qts (over 0.6).  These are all rules of thumb.  


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V6Thomas
(@v6thomas)
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20/04/2020 8:20 am  

I think I might manage to use sound imports. I dont mind mate whatever you thinks good choose I will go for. Can u recommend a amp too ?


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V6Thomas
(@v6thomas)
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20/04/2020 9:03 am  

Ground zero dose look good tbh.

Can you recommend a amp and run a simulation to check if that will work.

 

I will buy you a beer lol


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123Toid
(@123toid)
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20/04/2020 11:12 pm  

@v6thomas

It looks like Groudn Zero used some creative marketing to askew their numbers.  Everywhere you look it has an z-max of 25mm.  However, if you dig deeper, you see it's one way xmax is only 11mm. It will still work, but with less power.  You would want a 200w RMS amplifier with a subsonic/infrasonic filter around 20-28hz.  This will still give you a max spl of around 104.  The only amplifier I could really see was this one. http://www.caraudiodirect.co.uk/amplifiers/mono-amplifiers/vibe-powerbox-500-1-v7-1000w-class-d-mono-channel-car-subwoofer-amplifier   In America, we also have the Rockford Fosgate R2-250X1, which has a variable infrasonic filter.  I only saw the older model on your site (R250x1) which I could not find any mention of an infrasonic filter. 


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123Toid
(@123toid)
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20/04/2020 11:21 pm  

It looks like this would work as well.  I would mention, do not use the bass boost with any of these amplifiers. https://www.caraudiocentre.co.uk/product_m-phoenix-gold-audio-rx2250-1_p-42049.htm

You could also get a much higher rated amplfier and turn the gain down.  If you aren't sure how to set the gain, check this out by @diy-audio-guy

 


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V6Thomas
(@v6thomas)
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21/04/2020 5:40 am  

Toid,

 

I think I can use sound imports. Can you suggest the best options on that site.

If I cant I will revert back to the other options but lets try sound imports.

 

Thanks for the help so far!

Sooner I can order the better


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V6Thomas
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21/04/2020 5:42 am  

Also, I thought if you buy a 700w sub you needed a 700w amp?
Probably because I'm new to this kind of thing and I'm probably very wrong lol. But can you enlighten me?


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123Toid
(@123toid)
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22/04/2020 3:42 pm  

@v6thomas

I mean I would personally use the 10 in ultimax from sound imports. if you can do that, that would be a better choice. 

As far as amplifier power goes, that's a common misconception. People just assume that if it says 700 Watts RMS, it can take 700 Watts. And although that true... It really is false. What I mean to say is, depending on the box that you put it in the driver will hit its mechanical limits before that 700 Watts RMS. So the amount of wattage a subwoofer can take is dependent upon the box that you put it in.


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V6Thomas
(@v6thomas)
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22/04/2020 3:44 pm  

@123toid thanks toid

 

Can you link me the amp and sub incase I mess it up


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V6Thomas
(@v6thomas)
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22/04/2020 4:04 pm  

@123toid

 

Ahh that's out my budget abit tbh 

Any thing else that would work?


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123Toid
(@123toid)
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22/04/2020 4:53 pm  

@v6thomas

sub:> http://www.caraudiodirect.co.uk/subwoofers/10-inch-subs-25cm/ground-zero-iridium-gziw-10spl-subwoofer-10-inch-700w-dvc-2-ohms  /p>

amp: https://www.caraudiocentre.co.uk/product_m-phoenix-gold-audio-rx2250-1_p-42049.htm

You can go with a higher power amplifier if you want, just set your gain appropriately.  This is definitely on the lower side for power. 


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V6Thomas
(@v6thomas)
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24/04/2020 1:37 pm  

Any suggestion of wire gauges and stuff?


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