Upgrade subwoofer speaker?

[REDa3STALLION]

Can I upgrade the sub speaker in the back of my 2015 audi a3 ? And what is the size of that speaker aswell? Also I saw a YouTube video where I can hook up an Amp to that subwoofer speaker in the back by tapping in to the speaker wire ?

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[IMAUDIZ]

Bump


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[949]

with some modification, yes.

its gonna cost money to do it.

[yakev724]

prob easier to just buy an enclosure to fit in the spare (either OEM from europe/UK or OEM helix upgrade for mk7 golf) and modify that if you don't want a box in the trunk.

I went that route in fiancee's Q5. Replaced one in the enclosure with https://www.earthquakesound.com/~ear...zoo/item/sws65 and smallest JL amp they make mounted to an OEM bracket in the trunk.

Would love to repeat on my car but too many projects at the moment.

[Bobbybrown]

Easy search shows been asked many times ... here's a couple links to get you started ...

https://www.audizine.com/forum/showt...highlight=lc2i

https://www.youtube.com/watch?v=6jVV60pwjYI

[REDa3STALLION]

Easy search shows been asked many times ... here's a couple links to get you started ...

https://www.audizine.com/forum/showt...highlight=lc2i

https://www.youtube.com/watch?v=6jVV60pwjYI

So all I need is a lc2i Amp? I have an amp already for the sub I have already and also what speaker size is the stock sub ? A 6 or an 8 in?

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[Bobbybrown]

The LC2i is a line convertor ... so it will take the signal going to the OEM sub (via speaker wires) and converts into a signal that you can input to your AMP via RCA's.

Sub size ... you can potentially fit any size you want, just need to make an adapter plate for mounting. I used a JL 8 inch sub and made a custom fiberglass enclosure so it fits neatly in the side pocket.

I also used my Epicenter from the 90's to maximize and enhance the bass output and also have control over it via the rotary adjustment dial.

[REDa3STALLION]

The LC2i is a line convertor ... so it will take the signal going to the OEM sub (via speaker wires) and converts into a signal that you can input to your AMP via RCA's.

Sub size ... you can potentially fit any size you want, just need to make an adapter plate for mounting. I used a JL 8 inch sub and made a custom fiberglass enclosure so it fits neatly in the side pocket.

I also used my Epicenter from the 90's to maximize and enhance the bass output and also have control over it via the rotary adjustment dial.

Do u have a pic

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[REDa3STALLION]

What speaker size is the stock sub in a 2015 a3 8v prem plus ? And if I got one size up would I have to make the hole bigger

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[cshocker]

I’ll be adding 2 10” JL tomorrow. Have everything ran (non B&O) IMG_2771.jpg


Here was tapping in for signal.


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[REDa3STALLION]

I’ll be adding 2 10” JL tomorrow. Have everything ran (non B&O) IMG_2771.jpg


Here was tapping in for signal.


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So I should be following Suite and get mine to look like that inorder to put in a new sub . I was thinking an 8in speaker but what size is in the audi a3 stock ?

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[yakev724]

On the BMW E90 platform, the SWS 8xi is a common plug+play replacement for the 2 stock under-seat subs. Require adapter plates which forum members print + sell for $20/pair. Stock drivers are 4ohm, SWS 2ohm. Even without additional amplification there's a decent improvement and easy nature of the swap has plenty of people on board. https://www.e90post.com/forums/showthread.php?t=711979

I wonder if we can do something similar with our cars. Low profile driver will be nice for those of us that don't want to sacrifice trunk space, and not *requiring* an amp would be a great intermediate upgrade as well.

What's the diameter of the stock sub?

[yakev724]

Stock non-B&O sub is 2ohm 40W, single driver. Just bought a used one to take apart and try to replace the driver with an SWS unit.

[REDa3STALLION]

Stock non-B&O sub is 2ohm 40W, single driver. Just bought a used one to take apart and try to replace the driver with an SWS unit.

What does that even mean

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[yakev724]

What does that even mean

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Gonna try to upgrade the rear shelf sub by swapping with a shallow Earthquake SWS unit (6.5" or 8").

Non B&O stock shelf sub is a single 2ohm driver, B&O is dual 8ohm driver I believe so swap isn't as straightforward, have 2 incoming channels to replace with one.

[Bobbybrown]

Lots of reliable resources online ...

https://www.crutchfield.ca/car/outfitmycar/mycar.aspx

[REDa3STALLION]

Lots of reliable resources online ...

https://www.crutchfield.ca/car/outfitmycar/mycar.aspx

Wow thanks Bobby brown that site is perfect !!!!

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[mroberte]

What I did...
https://youtu.be/VsJu1P2G338

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[yakev724]

Converted a stock sub into an adapter plate. Ordered a shallow-mount sub to fit in place of the stock one. https://www.earthquakesound.com/inde...ers/item/sws10

Once it's all together (don't expect stock amp to provide nearly enough power) will think about mounting/wiring this tiny amp behind the right side panel in the trunk. https://www.jlaudio.com/collections/...plifiers-98406

[REDa3STALLION]

Converted a stock sub into an adapter plate. Ordered a shallow-mount sub to fit in place of the stock one. https://www.earthquakesound.com/inde...ers/item/sws10

Once it's all together (don't expect stock amp to provide nearly enough power) will think about mounting/wiring this tiny amp behind the right side panel in the trunk. https://www.jlaudio.com/collections/...plifiers-98406

Well I was about to buy this sub speaker .....let me know if this would work ....Screenshot_20220203-191231_Amazon%20Shopping.jpg

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[yakev724]

Yep but keep in mind will need some custom fabrication for the bracket. Earthquake sws are great since they're as shallow as the stock driver, great if you want a completely stealth install which I'm after...

[REDa3STALLION]

Yep but keep in mind will need some custom fabrication for the bracket. Earthquake sws are great since they're as shallow as the stock driver, great if you want a completely stealth install which I'm after...

325 is alot of money

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[yakev724]

Keep an eye on amazon/fb marketplace. Got mine for $90 shipped on Amazon. Next cheapest one is $150-160 I think.

[mroberte]

If you can, find the jbl 810 or it's successor, it really has made the car audio that much better. Upgrading the midrange speakers in the front doors as well.

An amp is required, but if you use the stock amp temp, make sure you get the right ohm woofer, otherwise damage will occur.

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[REDa3STALLION]

If you can, find the jbl 810 or it's successor, it really has made the car audio that much better. Upgrading the midrange speakers in the front doors as well.

An amp is required, but if you use the stock amp temp, make sure you get the right ohm woofer, otherwise damage will occur.

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Wait can u send me a list of everything I would need

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[REDa3STALLION]

Keep an eye on amazon/fb marketplace. Got mine for $90 shipped on Amazon. Next cheapest one is $150-160 I think.

I can do 150 160

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[REDa3STALLION]

Converted a stock sub into an adapter plate. Ordered a shallow-mount sub to fit in place of the stock one. https://www.earthquakesound.com/inde...ers/item/sws10

Once it's all together (don't expect stock amp to provide nearly enough power) will think about mounting/wiring this tiny amp behind the right side panel in the trunk. https://www.jlaudio.com/collections/...plifiers-98406

Is this it ?Screenshot_20220203-204842_Amazon%20Shopping.jpg

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[949]

Converted a stock sub into an adapter plate. Ordered a shallow-mount sub to fit in place of the stock one. https://www.earthquakesound.com/inde...ers/item/sws10

Once it's all together (don't expect stock amp to provide nearly enough power) will think about mounting/wiring this tiny amp behind the right side panel in the trunk. https://www.jlaudio.com/collections/...plifiers-98406

this would work out, but the issue with this idea is that its not a perfect circle. for the effort and cost, i cant do this. i am still interested in seeing your process and finished product. i always enjoy innovation. keep us informed with photos.

but for me i am currently planning out a custom ring and using a jl audio subwoofer. not sure i can fit a 10inch but i know a 8inch works fine. currently the model i am looking at is sold out everwhere and i need to take measurements before committing to a size. i may even offer the custom ring to people with A3, S3, RS3 if it works out as planned. so you just drop in the rear and call it day. i would need to know diam size and thickness or you just want to max out the thickness. as the rear deck to the cushion is only 3inch deep. so leaving enough room for excursion, i would say a subwoofer ring of about 1inch to 2inch is good. min of 1inch cause you would want a good supporting base.

must get the nav tv zev V convertor to make sure all signals are straight.
doing a subwoofer install is fun but it does cost a lot to do it right.

i want to do an active front stage but with the bare space in the trunk i don't think i can pull it off with my amps i have. they are large and i have been wanting to use them forever.

[mroberte]

Wait can u send me a list of everything I would need

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Check the YouTube video above and the description has everything.

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[yakev724]

this would work out, but the issue with this idea is that its not a perfect circle. for the effort and cost, i cant do this. i am still interested in seeing your process and finished product. i always enjoy innovation. keep us informed with photos.

but for me i am currently planning out a custom ring and using a jl audio subwoofer. not sure i can fit a 10inch but i know a 8inch works fine. currently the model i am looking at is sold out everwhere and i need to take measurements before committing to a size. i may even offer the custom ring to people with A3, S3, RS3 if it works out as planned. so you just drop in the rear and call it day. i would need to know diam size and thickness or you just want to max out the thickness. as the rear deck to the cushion is only 3inch deep. so leaving enough room for excursion, i would say a subwoofer ring of about 1inch to 2inch is good. min of 1inch cause you would want a good supporting base.

must get the nav tv zev V convertor to make sure all signals are straight.
doing a subwoofer install is fun but it does cost a lot to do it right.

i want to do an active front stage but with the bare space in the trunk i don't think i can pull it off with my amps i have. they are large and i have been wanting to use them forever.

That's my plan if this fails - 3d print some rings, ideally can scan the stock sub to get the mounting points + locating pins matched. Top of the unit is a perfect circle , it does taper in at the side as you can see but I'm hoping the SWS unit is shallow enough to taper in more and not interfere.

If this fails I'll switch to fitting an 8xi - 2ohm 8" driver which will be plenty in terms of power, weigh less, and have a shot at getting driven ok by the stock amp (non-B&O)

On the E90 forums someone very successfully printed them + sold them for $40/pair.

Is this it ?Screenshot_20220203-204842_Amazon%20Shopping.jpg

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That's the 8" commonly used in E90s. I got the 10", see above.

[REDa3STALLION]

That's my plan if this fails - 3d print some rings, ideally can scan the stock sub to get the mounting points + locating pins matched. Top of the unit is a perfect circle , it does taper in at the side as you can see but I'm hoping the SWS unit is shallow enough to taper in more and not interfere.

If this fails I'll switch to fitting an 8xi - 2ohm 8" driver which will be plenty in terms of power, weigh less, and have a shot at getting driven ok by the stock amp (non-B&O)

On the E90 forums someone very successfully printed them + sold them for $40/pair.




That's the 8" commonly used in E90s. I got the 10", see above.

OK but I was thinking on going with a 8in sub so I didn't have to do work on the body or whatever in order to fit a bigger sub. I have a Polk audio 12in in a box but didnt want to add that either due to weight so ima try the 8in and if that doesn't work out well then I'll just return the speaker and get a diff one

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[REDa3STALLION]

Is there any recommendations on the door speakers ? Like how many watts should I get etc without adding an amp to them and will atleast sound better then the stock......thank u

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[REDa3STALLION]

The beginning stages has begun 20220205_160903.jpg20220205_160917.jpg20220205_160909.jpg20220205_161429.jpg

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[Panzer]

Does anyone have any recommendations for the B&O sub replacement or can tell me how to retrofit 2 subs to work with the stock amp? I'm looking for a drop in replacement and when it comes to audio stuff, I'm a noob. Don't know much about the whole metrics of speakers or how to calculate what I should be buying. I bought a 2016 A3 with B&O and I'm 90% certain the oem sub is blown.

[REDa3STALLION]

OK I need to know where do I run my remote wire 1 and 2 is does anyone have a diagram for a factory unit install either upgraded sub and amp

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[949]

Does anyone have any recommendations for the B&O sub-replacement or can tell me how to retrofit 2 subs to work with the stock amp? I'm looking for a drop in replacement and when it comes to audio stuff, I'm a noob. Don't know much about the whole metrics of speakers or how to calculate what I should be buying. I bought a 2016 A3 with B&O and I'm 90% certain the oem sub is blown.

you should make a new thread for your question. that way you'll get more answers.

first thing, your stock amp isn't strong enough for two aftermarket subwoofers. the stock amp is not designed to really do that in the first place.

just spend the money to get a new stronger amp. it isn't that expensive.

it looks like DS18 line of subwoofers are a nice and cost-effective subwoofer option. they have slim profiles and different sizes.

[REDa3STALLION]

you should make a new thread for your question. that way you'll get more answers.

first thing, your stock amp isn't strong enough for two aftermarket subwoofers. the stock amp is not designed to really do that in the first place.

just spend the money to get a new stronger amp. it isn't that expensive.

I have a amp ..

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[REDa3STALLION]

Not a factory amp it used to power my Kenwood 12 or maybe it's a 10 but I need help I forgot the wiring set up plus it's my first time doing this using the stock wires from the original connecter. I cut it off and obviously one side went to positive and other negative and have the amp to come on but not sure the speaker/wire setup

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[REDa3STALLION]

How many watts does my amp need to be to power my 8inch 800 watts sub ? I have a 250w 2 Chanel amp but not sure it will sound good with my sub

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[cshocker]

2x RMS rating of sub. Then set amp gains via DMM to get correct voltage to match watts.