Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 04-08-2015, 07:54 AM   #1
Registered User
 
CrisZenithBlue's Avatar
 
Join Date: Mar 2015
Location: Miami, FL
Posts: 527
new audio system through stock amplifier not "booming" please help!

hi guys,

one of the very first thing i did to my new to me 2000 Boxster is replace the audio system, the stock one was just so terribly bad with those paper speakers..

i bought a kenwood and new speakers for the dash and doors replacing the stock ones. no rear or sub from factory. i connected everything through the appropriate harness provided by the headunit manufacturer so didnt cut into the stock wires at all and so i can use the original amp as well (as suggested by the company where i got the kenwood)

trouble is.. the dash speakers are great and loud but the door ones only get a little bit of power to them and it sounds like only bass(but very low).. they seem like all they do is vibrate but not making a lot of noise, no mid or trebble on them from what i can tell. i'm guessing that is the way the amp was configured from factory as the stock door speakers were doing the same. i played with the headunit settings quite a bit and am pretty sure its not that. my money is on the amp.


any tips on how to work around this? i need those door speakers to boom to have proper sound so i probably need to wire the door speakers differently.

thanks!

Cristian

CrisZenithBlue is offline   Reply With Quote
Old 04-08-2015, 09:47 AM   #2
Registered User
 
Join Date: Nov 2014
Location: Flower Mound, TX
Posts: 29
The door speakers are bass only and the amp passes only LF bass to them. If you want full range in the door speakers, the easiest method is to bypass the amp and make the door speakers the "rear speakers" when wiring to your receiver.

I did the same thing in the last couple of days. Replaced the head unit with Kenwood and dash speakers with Kicker. MUCH better sound. Next I will replace the door speakers and wire them directly to the Kenwood. Since I drive with the top down most of the time, I am not looking for audiophile results.

If you do a search, there are several threads on this issue.
Gremlin is offline   Reply With Quote
Old 04-08-2015, 10:00 AM   #3
Living in the desert.
 
Join Date: Jun 2013
Location: Tombstone, AZ
Posts: 82
Take the stock amp and see how far you can throw it.
Most car stereos put out more power than that amp does, so you'll want to just bypass it.
__________________
Whatever
tonichristi is offline   Reply With Quote
Old 04-08-2015, 10:16 AM   #4
Registered User
 
CrisZenithBlue's Avatar
 
Join Date: Mar 2015
Location: Miami, FL
Posts: 527
thanks for the feedback!

i read most people bypass it and connect the door speakers as rear so they can play with the volume separately getting great results.

now i just need to find a good DYI to get me through the amp bypass..
CrisZenithBlue is offline   Reply With Quote
Old 04-08-2015, 08:51 PM   #5
Registered User
 
madmodz's Avatar
 
Join Date: Jul 2012
Location: Scottsdale, AZ
Posts: 174
Check phasing on your speakers. You can use a d or 9volt battery to do this. Basically your wires might be reversed. Youtube has how-to videos.
madmodz is offline   Reply With Quote
Old 04-08-2015, 09:07 PM   #6
Registered User
 
rdass623's Avatar
 
Join Date: Apr 2014
Location: new orleans
Posts: 249
the stock amp as stated earlier has a low bypass. the door speakers are subwoofers only in stock amp configured systems. you can either purchase a new amp or run directly from the new head unit. either way your sound quality will improve. my old boxy was configured with an amp driving the front and door speakers and directly off the head unit for additional speakers added into the pizza oven on the rear deck.
__________________
2005 Porsche Boxster S, 2000 Porsche Boxster 2.7L Base, 2000 Mazda Miata LS Supercharged, 2010 Toyota Tacoma TRD Off Road
Previous Vehicles: 2005 Ford Mustang GT, 1986 Alfa Romeo Spider, 1971 Alfa Romeo GTV, 1999 Ford Mustang
1977 Toyota Celica GT
rdass623 is offline   Reply With Quote
Old 05-28-2015, 11:06 AM   #7
Registered User
 
CrisZenithBlue's Avatar
 
Join Date: Mar 2015
Location: Miami, FL
Posts: 527
can someone recommend a decent cheap amp to replace the factory one? something as plug and play as possible? not looking for power as my speakers are only 50W anyway.

just looking to get rid of that stock configuration where the door speakers are used a sub woofers. i just want all speakers at full blast nothing else.

thanks!
CrisZenithBlue is offline   Reply With Quote
Old 05-28-2015, 11:42 AM   #8
Patriot
 
particlewave's Avatar
 
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,139
Garage
You really need to forget the amp altogether.

Your kenwood head unit probably puts out 45-55 watts per channel, which is already ideal. No need to pipe the signal through an amp.

Bypass the stock amp and you will be happy, I promise
If you'll take a picture of your stock amp and a closeup of the wiring at the amp, I can verify your setup and tell you what wires to cut and splice to bypass.
You should be able to do it all in the frunk. No need to pull the stereo or get into the dash.

Last edited by particlewave; 05-28-2015 at 11:49 AM.
particlewave is offline   Reply With Quote
Old 05-28-2015, 12:35 PM   #9
Registered User
 
CrisZenithBlue's Avatar
 
Join Date: Mar 2015
Location: Miami, FL
Posts: 527
Quote:
Originally Posted by particlewave View Post
You really need to forget the amp altogether.

Your kenwood head unit probably puts out 45-55 watts per channel, which is already ideal. No need to pipe the signal through an amp.

Bypass the stock amp and you will be happy, I promise
If you'll take a picture of your stock amp and a closeup of the wiring at the amp, I can verify your setup and tell you what wires to cut and splice to bypass.
You should be able to do it all in the frunk. No need to pull the stereo or get into the dash.
oh man this is exactly what i was hoping to do initial plan was to bypass the amp but it all seemed a bit overwhelming and didnt want to mess up the wiring.

i have some pics of the wiring but might not be good enough. i will upload asap and take more as needed.

thanks i really appreciate it!
CrisZenithBlue is offline   Reply With Quote
Old 05-28-2015, 04:01 PM   #10
Registered User
 
CrisZenithBlue's Avatar
 
Join Date: Mar 2015
Location: Miami, FL
Posts: 527
here are a couple of photos of the amp wiring i had on my phone.. not sure if these work?

i can take more if needed.



CrisZenithBlue is offline   Reply With Quote
Old 05-28-2015, 04:29 PM   #11
Patriot
 
particlewave's Avatar
 
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,139
Garage
In the last picture, it looks like your inputs are on the bottom connector (smaller wires) and the outputs are on the upper connector, along with the power wires. This is what I hoped to see

Up to 2000 models only

Front Right
+ {Violet with Red stripe} to {Red}
- (Common) {Brown with Black stripe} to {Red with Brown stripe}

Front Left
+ {Green with Red stripe} to {Yellow}
- (Common) {Brown with Black stripe} to {Yellow with Brown stripe}

Door Right
+ {Red with Black stripe} to {Violet}
- (Common) {Brown with Black stripe} to {Brown with Violet stripe}

Door Left
+ {Yellow with Red stripe} to {Green}
- (Common) {Brown with Black stripe} to {Brown with Green stripe}

If everything works, then you can then toss the stock amp.

Last edited by particlewave; 05-28-2015 at 06:19 PM.
particlewave is offline   Reply With Quote
Old 05-28-2015, 05:07 PM   #12
Registered User
 
BruceH's Avatar
 
Join Date: Jun 2012
Location: Bedford, TX
Posts: 2,559
Garage
I need to do this too. I will have to take a look at my amp when I get a chance. Thanks again for all of your contributions to this forum Charles
__________________
______________________________________________
2001 Boxster S Lapis Blue
TS Cat Bypass Pipes and exhaust
iPad Mini Dash Install
DEPO Tail Lights
BruceH is offline   Reply With Quote
Old 05-28-2015, 05:22 PM   #13
Patriot
 
particlewave's Avatar
 
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,139
Garage
The 986 uses a common ground for the speakers on the OEM HU, whilst most aftermarket HUs will use a floating ground. The "adapter" is a floating ground adapter and also degrades sound a bit.
The absolute best route would be to run new dedicated negative wires for each speaker from the new HU to the output neg wires at the amp (after its gone). The car has dedicated negative speaker wires from the amp to speakers, just not from HU to amp.
This is what I did.

Thanks Bruce!
particlewave is offline   Reply With Quote
Old 05-29-2015, 06:37 AM   #14
Registered User
 
CrisZenithBlue's Avatar
 
Join Date: Mar 2015
Location: Miami, FL
Posts: 527
ok this is great! i am well on my way!

one question though.. i like the idea of running new negative wires from the HU. how did you run them through the firewall? did you follow the existing wires from the HU to the amp?

thanks!!
CrisZenithBlue is offline   Reply With Quote
Old 05-29-2015, 11:26 AM   #15
inveniam viam aut faciam
 
Join Date: Mar 2014
Location: Arvada, CO
Posts: 433
Personally, I would just forget the factory wiring and run new wires to the dash, doors and back (if you have rear speakers), if you are going to just use the speaker outputs from the head unit. That way you can also leave the factory wiring alone so if you want to put it back to stock for some reason, it would be easy to reconnect.

The only kind of tricky part is the door speaker wiring, but you can get at the wires right at the A pillar where they go into the door connector. They are pretty easy to find as they are the only large twisted pairs of wires going into the door. If you cut and splice into them a few inches back, it would be easy to undo in the future.

Right door: Violet (+), Violet/Brown (-)
Left door: Green (+), Green/Brown (-)

I have an '03 with the MOST optical bus for the input to the amp and CD changer signals, so I pretty much have to rewire if I upgrade the head unit. Running new wires to the speakers is FAR easier than messing with running wires to the amp connector.

FWIW, I worked as a pro stereo installer through college. At that time I always had to have the latest and greatest. Now I just leave the OE stuff and listen to FM with the top up and the engine with the top down...
__________________
'03 S, manual, 18" Carrera wheels, PSM, PSE, Litronic, 996 Cluster, +
Qmulus is offline   Reply With Quote
Old 05-31-2015, 02:53 PM   #16
Registered User
 
CrisZenithBlue's Avatar
 
Join Date: Mar 2015
Location: Miami, FL
Posts: 527
thanks for the input guys it really helped me a lot! got it done this weekend and am VERY happy with the improved sound. it's booming now

was fiddly and took quite a bit of patience but well worth it and satisfying in the end. since i had everything apart i took advantage and hard wired my radar detector as well so double win!
CrisZenithBlue is offline   Reply With Quote
Old 06-01-2015, 10:35 AM   #17
Patriot
 
particlewave's Avatar
 
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,139
Garage
Nice!

Glad it all worked out!
particlewave is offline   Reply With Quote
Old 06-01-2015, 11:04 AM   #18
Registered User
 
BruceH's Avatar
 
Join Date: Jun 2012
Location: Bedford, TX
Posts: 2,559
Garage
Quote:
Originally Posted by CrisZenithBlue View Post
ok this is great! i am well on my way!

one question though.. i like the idea of running new negative wires from the HU. how did you run them through the firewall? did you follow the existing wires from the HU to the amp?

thanks!!
Quote:
Originally Posted by CrisZenithBlue View Post
thanks for the input guys it really helped me a lot! got it done this weekend and am VERY happy with the improved sound. it's booming now

was fiddly and took quite a bit of patience but well worth it and satisfying in the end. since i had everything apart i took advantage and hard wired my radar detector as well so double win!
So, did you run the negative wires from the HU? Was that the fiddly part?
__________________
______________________________________________
2001 Boxster S Lapis Blue
TS Cat Bypass Pipes and exhaust
iPad Mini Dash Install
DEPO Tail Lights
BruceH is offline   Reply With Quote
Old 06-01-2015, 11:22 AM   #19
Registered User
 
CrisZenithBlue's Avatar
 
Join Date: Mar 2015
Location: Miami, FL
Posts: 527
yeah i ended up running the negative wires from the HU to get the most out of the system. definitely worth it!
CrisZenithBlue is offline   Reply With Quote
Old 07-03-2015, 06:57 AM   #20
Registered User
 
jeeper31's Avatar
 
Join Date: Jul 2014
Location: Long Island
Posts: 180
Quote:
Originally Posted by CrisZenithBlue View Post
yeah i ended up running the negative wires from the HU to get the most out of the system. definitely worth it!
This might be a stupid question put if you didn't runt he negative wires from the HU where would you run them from?

jeeper31 is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 09:05 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page