Tapping Audio Outputs to Add a Subwoofer to Harmon Kardon

nearwater4me · 04-11-2022, 03:38 PM

Quote:

Originally Posted by BIGW0RM

Question. Im about to buy the harness. But I am confused about a few of the plugs.

I know the big plugs intercept between the amp. But what are the other three small plugs for? I assume one of them goes out to the LOC? If so, what are the other two plugs for?

https://technicpnp.com/wp-content/up...ed-600x400.jpg

Quote:

Originally Posted by BIGW0RM

^^^Disregard.

Technic just told me its a pigtail for amp'ing your stock subs and the other for your own LOC if you go that route.

Glad you got your answer.
Yeah, the small far left connector is for when you want to power the USW with an aftermarket amp.
If you're using the factory booster, you simply connect the 2nd from the left connector (2 green, 2 white) with the far right connector - basically a pass thru.
There's a separate (not pictured) connector you wire to a LOC and connect to the 2nd from the right connector.
It'll all make sense once you receive the harness.

BIGW0RM · 04-12-2022, 10:06 AM

Quote:

Originally Posted by nearwater4me

Glad you got your answer.
Yeah, the small far left connector is for when you want to power the USW with an aftermarket amp.
If you're using the factory booster, you simply connect the 2nd from the left connector (2 green, 2 white) with the far right connector - basically a pass thru.
There's a separate (not pictured) connector you wire to a LOC and connect to the 2nd from the right connector.
It'll all make sense once you receive the harness.

Thank you my friend. Question. Does turning off active sound REALLY turn it off? Someone mentioned that they still heard theirs even with it disabled in bimmercode.

BIGW0RM · 04-12-2022, 10:15 AM

Also, what enclosures are you all using? I have a JLW6 12" and in a sealed box. I had it in my F80 years back. But I really dont want that big honking box in there. I would prefer a custom corner box, but have yet to find one (I had he musiccar stealth box in my E92, LOVED THAT).

Im tempted to get one of those all in on subs that seem to be smaller in size than what I have now. I just dont know where to mount it and it look clean as possible.

Ugh, we need a corner stealth box for the G series!!!

nearwater4me · 04-12-2022, 10:21 AM

Quote:

Originally Posted by BIGW0RM

Thank you my friend. Question. Does turning off active sound REALLY turn it off? Someone mentioned that they still heard theirs even with it disabled in bimmercode.

I haven't tried turning it off thru BC yet.
Last time I checked, there was a mention about having to use the beta version?

nearwater4me · 04-12-2022, 10:23 AM

Quote:

Originally Posted by BIGW0RM

Also, what enclosures are you all using? I have a JLW6 12" and in a sealed box. I had it in my F80 years back. But I really dont want that big honking box in there. I would prefer a custom corner box, but have yet to find one (I had he musiccar stealth box in my E92, LOVED THAT).

Im tempted to get one of those all in on subs that seem to be smaller in size than what I have now. I just dont know where to mount it and it look clean as possible.

Ugh, we need a corner stealth box for the G series!!!

We sure do. Hopefully there'll be an aftermarket offering soon.

BIGW0RM · 04-12-2022, 10:51 AM

Quote:

Originally Posted by nearwater4me

We sure do. Hopefully there'll be an aftermarket offering soon.

Thats pretty much the only thing holding me back from doing this. My JL W612" box is a single box, but its bigger than most of those all in one units. I just dont want to have to strap it down in there to keep it from moving around. I had it in my F80 and had it pinned down with straps. It just didn't look very nice and I had to remove it every time the wife and I would road trip vacation to so we could fit out suitcases. Or two golf club sets.

A nice stealthbox would circumvent all of that.

Murf · 04-12-2022, 10:53 AM

Wait, does this mean you can replace the underseat subs with something like the Ghosts and then drive them with your own (assume bigger) amp, without screwing with the rest of the system? Wouldnt that solve some of the issues with bass?

Originally Posted by BIGW0RM View Post
^^^Disregard.

Technic just told me its a pigtail for amp'ing your stock subs and the other for your own LOC if you go that route.

BIGW0RM · 04-12-2022, 11:04 AM

Quote:

Originally Posted by Murf

Wait, does this mean you can replace the underseat subs with something like the Ghosts and then drive them with your own (assume bigger) amp, without screwing with the rest of the system? Wouldnt that solve some of the issues with bass?

Originally Posted by BIGW0RM View Post
^^^Disregard.

Technic just told me its a pigtail for amp'ing your stock subs and the other for your own LOC if you go that route.

Correct. The harness allows you to amp your stock subs if you choose too. I tried that with my F10 M5 years ago and while it made them cleaner sounding, they still didn't bump as good as I expected them to sound with an AMP. I ended up moving the amp back to a separate sub in the back.

Murf · 04-12-2022, 01:02 PM

Understood. So more power good but doesnt necessarily solve the problem.

I did order the ghosts anyway using 15% promotion, figure for $500 and 100 day returns it's worth a shot. I also am running the B&W codecs so maybe the increased bass helps with upgraded underseats.

BIGW0RM · 04-12-2022, 01:19 PM

Quote:

Originally Posted by Murf

Understood. So more power good but doesnt necessarily solve the problem.

I did order the ghosts anyway using 15% promotion, figure for $500 and 100 day returns it's worth a shot. I also am running the B&W codecs so maybe the increased bass helps with upgraded underseats.

It didnt in my case on my F10 M5. Thinking back about it, Im not sure the stock seat subs OHM was a good match either. I could be wrong. But I seem to think I remember the stock sub speaker ohm being a problem.

That pigtail might be better to use with aftermarket seat subs with an OHM rating that most car amps will accept.

BIGW0RM · 04-12-2022, 01:20 PM

Quote:

Originally Posted by Murf

Understood. So more power good but doesnt necessarily solve the problem.

I did order the ghosts anyway using 15% promotion, figure for $500 and 100 day returns it's worth a shot. I also am running the B&W codecs so maybe the increased bass helps with upgraded underseats.

Keep me posted on the ghost subs. Ive heard mixed reviews about them. Some say its much cleaner and better sounding. Some seemed disappointed. Keep us posted on those!

agnewfedaykin · 04-13-2022, 08:11 PM

After waiting for forever, it seems, myself for a custom corner box. I just decided to build ones my self an just ordered all the parts and some eBay trunk trims in case things go side ways (and I'm still waiting on my car to get delivered but shhh!). Getting most of it in this week. I was thinking of doing a build log and or a video on it have to self justify my GoPro purchase so might as well put it to use.

nearwater4me · 04-14-2022, 04:01 PM

Quote:

Originally Posted by agnewfedaykin

After waiting for forever, it seems, myself for a custom corner box. I just decided to build ones my self an just ordered all the parts and some eBay trunk trims in case things go side ways (and I'm still waiting on my car to get delivered but shhh!). Getting most of it in this week. I was thinking of doing a build log and or a video on it have to self justify my GoPro purchase so might as well put it to use.

Please share the build!

Back in the day when I was a lot more passionate about custom DIY jobs, I built a fiberglass enclosure + amp rack for my C6.
It was tedious but fun and very rewarding.
I guess I just got old and lazy lol
I got parts lying in my garage that I'm too lazy to install on the car.

But please share your build, it's always fun watching someone else's project

It might inspire me to build my own as well.

BIGW0RM · 04-15-2022, 10:53 AM

I emailed BAVsound about a G80 stealthbox like they had for the E and F series. They said it should be out sooner than later!

spridge · 04-15-2022, 11:04 AM

Quote:

Originally Posted by BIGW0RM

I emailed BAVsound about a G80 stealthbox like they had for the E and F series. They said it should be out sooner than later!

Take mah monah!

BIGW0RM · 04-15-2022, 11:52 AM

Quote:

Originally Posted by spridge

Take mah monah!

Right! I loved my E92 one. It looked 99.9% factory OEM. I will be buying one FOR SURE. I just hope they make it a 12" and not a 10". I already have a nice JL W6 12" ready to go.

spridge · 04-15-2022, 06:21 PM

Quote:

Originally Posted by BIGW0RM

Quote:

Originally Posted by spridge

Take mah monah!

Right! I loved my E92 one. It looked 99.9% factory OEM. I will be buying one FOR SURE. I just hope they make it a 12" and not a 10". I already have a nice JL W6 12" ready to go.

2x10" would also be sweet!

ibmc · 05-16-2022, 08:02 AM

Here is a pic of how I did it. I used a Class D amp (cool running) from RF- T750x1bd. I paired it with an LC2i to bring the line level up from a tap into the speaker system, and had a local installer do the work. I removed it from my old M4 and will be installed on my new one this coming Wednesday.

Technic · 05-16-2022, 12:19 PM

If you are looking for deeper bass than OEM woofers then replace the OEM woofers with SWS-8Xi and power them with the AudioControl acm-2.300. No need for a LOC or a trunk sub.

If you rather have a trunk sub then keep the OEM woofers, get a JL Audio 10W6v3-D4 (2ohms configuration) and power the sub and the OEM woofers with an XD500/3v2. OEM woofers should be set for 60Hz HP, sub for 80Hz LP.

tac3331 · 05-17-2022, 03:21 PM

Any yall familiar with what model the loc-150 provided by technic pnp? I'm trying get my jl w7 10" with a matched hd750 from high school back up a decade later. Any tips would be appreciated

nearwater4me · 05-17-2022, 03:55 PM

Quote:

Originally Posted by tac3331

Any yall familiar with what model the loc-150 provided by technic pnp? I'm trying get my jl w7 10" with a matched hd750 from high school back up a decade later. Any tips would be appreciated

See link

https://www.wavtech-usa.com/link2

tac3331 · 05-17-2022, 04:15 PM

Quote:

Originally Posted by nearwater4me

See link

https://www.wavtech-usa.com/link2

Do you happen to know if it'd be better to run bass knob on the loc or amp?

04-12-2022, 10:15 AM	#25
BIGW0RM You got my money? 3156 Rep 4,646 Posts Drives: Ice Cream Truck Join Date: Jul 2011 Location: ///OC iTrader: (14) Garage List 2022 BMW M3 [9.50]	Also, what enclosures are you all using? I have a JLW6 12" and in a sealed box. I had it in my F80 years back. But I really dont want that big honking box in there. I would prefer a custom corner box, but have yet to find one (I had he musiccar stealth box in my E92, LOVED THAT). Im tempted to get one of those all in on subs that seem to be smaller in size than what I have now. I just dont know where to mount it and it look clean as possible. Ugh, we need a corner stealth box for the G series!!! __________________ 2022 G80 M3 Competition X / 2020 Range Rover Sport P525 / 2023 Ford Raptor
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04-12-2022, 10:53 AM	#29
Murf Captain 885 Rep 897 Posts Drives: 2021 G80 M3C - Dravit Grey Join Date: Apr 2011 Location: Florida iTrader: (2)	Wait, does this mean you can replace the underseat subs with something like the Ghosts and then drive them with your own (assume bigger) amp, without screwing with the rest of the system? Wouldnt that solve some of the issues with bass? Originally Posted by BIGW0RM View Post ^^^Disregard. Technic just told me its a pigtail for amp'ing your stock subs and the other for your own LOC if you go that route.
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04-12-2022, 01:02 PM	#31
Murf Captain 885 Rep 897 Posts Drives: 2021 G80 M3C - Dravit Grey Join Date: Apr 2011 Location: Florida iTrader: (2)	Understood. So more power good but doesnt necessarily solve the problem. I did order the ghosts anyway using 15% promotion, figure for $500 and 100 day returns it's worth a shot. I also am running the B&W codecs so maybe the increased bass helps with upgraded underseats.
	Appreciate 0 Quote

04-13-2022, 08:11 PM	#34
agnewfedaykin Enlisted Member 24 Rep 31 Posts Drives: 2021 330i xDrive / 2022 M3 Com Join Date: Sep 2020 Location: DE iTrader: (0) Garage List 2022 BMW M3 Competi ... [0.00]	After waiting for forever, it seems, myself for a custom corner box. I just decided to build ones my self an just ordered all the parts and some eBay trunk trims in case things go side ways (and I'm still waiting on my car to get delivered but shhh!). Getting most of it in this week. I was thinking of doing a build log and or a video on it have to self justify my GoPro purchase so might as well put it to use. __________________ 2021 BMW 330i xDrive 2022 BMW M3 Competition xDrive (Individual Riviera)(Ordered)
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04-15-2022, 10:53 AM	#36
BIGW0RM You got my money? 3156 Rep 4,646 Posts Drives: Ice Cream Truck Join Date: Jul 2011 Location: ///OC iTrader: (14) Garage List 2022 BMW M3 [9.50]	I emailed BAVsound about a G80 stealthbox like they had for the E and F series. They said it should be out sooner than later! __________________ 2022 G80 M3 Competition X / 2020 Range Rover Sport P525 / 2023 Ford Raptor
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05-16-2022, 08:02 AM	#40
ibmc Private First Class 127 Rep 137 Posts Drives: 22 M4 Comp G82 RWD Join Date: Dec 2021 Location: USA iTrader: (0)	My setup in my 2018 M4, 2022 M4 soon Here is a pic of how I did it. I used a Class D amp (cool running) from RF- T750x1bd. I paired it with an LC2i to bring the line level up from a tap into the speaker system, and had a local installer do the work. I removed it from my old M4 and will be installed on my new one this coming Wednesday. Attached Images
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05-16-2022, 12:19 PM	#41
Technic Lieutenant General 2288 Rep 13,001 Posts Drives: 2021 i3S, 2024 i4 M50 Join Date: Apr 2005 Location: Florida iTrader: (18)	If you are looking for deeper bass than OEM woofers then replace the OEM woofers with SWS-8Xi and power them with the AudioControl acm-2.300. No need for a LOC or a trunk sub. If you rather have a trunk sub then keep the OEM woofers, get a JL Audio 10W6v3-D4 (2ohms configuration) and power the sub and the OEM woofers with an XD500/3v2. OEM woofers should be set for 60Hz HP, sub for 80Hz LP.
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05-17-2022, 03:21 PM	#42
tac3331 Second Lieutenant 90 Rep 259 Posts Drives: 2022 M3cx Join Date: Jan 2022 Location: Houston, TX iTrader: (0)	Any yall familiar with what model the loc-150 provided by technic pnp? I'm trying get my jl w7 10" with a matched hd750 from high school back up a decade later. Any tips would be appreciated
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