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

Reply
 
LinkBack Thread Tools Display Modes
Old 06-04-2019, 04:17 PM   #1
Registered User
 
Join Date: Apr 2017
Location: Evanston, IL
Posts: 68
Adding rear speakers cheap yankee style- can you help?

I have a '99 base with the Becker CRD-220 and the 4X40W amp up front. The stereo sounds great for what it is, but I'd like to add rear speakers. Played around with this kind of thing BITD, but that's a long time gone, and I only ever had enough knowledge to get me in trouble. I've searched the forum but have not seen particulars for my situation. From everything that I've read, it seems like I have to upgrade to the 6X amp, but I'm not sure, and if so, I'm not sure why. There are no relevant diagrams in my owner's manual or in the 101 projects book. The stereo head unit has a fader control that works so it seems like it's ready for a set of rear speakers. It seems like if you wire from the head unit and bypass the amp that you get a power mismatch, so I assume you can only wire speakers from the amp.
There are these empty "slots" (term, anyone?) for wires in the side of the amp where it seems like I could connect rear speakers -see second picture. I took a spare speaker and ran wires into the empty slots while the radio was on and got no life out of the speaker. Then I connected to the wires already there in different combinations, and the speaker came alive.
I'm a woodworker and will have fun making my own speaker boxes.

1.) Is there a way to connect to those empty slots to get rear speakers to come alive? (Would I have to wire from the head unit to the amp to make that happen?)

2.) Or, could I connect to the existing output wires and just have the rear speakers double up on the signal from the front speakers? Or is that bad form and I would overload the amp or weaken the signal?






Last edited by MikeMcMo; 06-04-2019 at 07:38 PM.
MikeMcMo is offline   Reply With Quote
Old 06-04-2019, 05:33 PM   #2
There Is No Substitute.
 
rick3000's Avatar
 
Join Date: May 2007
Location: West Coast
Posts: 3,049
Garage
You can't use a 4x40W amp to power the rear speakers, I guess if you really wanted to you could splice them in, but I don't see why you would do that when you can run the rears of the Becker head unit. The HU provides less power, but it still works, I had mine that way until I found a 6x40W amp from a 996.
__________________
1999 Ocean Blue Metallic Boxster - blueboxster.com
rick3000 is offline   Reply With Quote
Old 06-05-2019, 04:06 AM   #3
1998 Boxster Silver/Red
 
Join Date: Sep 2017
Location: 92262
Posts: 901
Quote:
Originally Posted by rick3000 View Post
You can't use a 4x40W amp to power the rear speakers.
Why not? Is it the amp? The reason I ask is because I've a 4x100 Rockford Fosgate powering the 2 dash and 2 rear deck speakers. My sub is self-powered. x4 means 4 speakers, no?

Why wouldn't his 4x40 amp power the rear speakers? I mean... if it's x4, and only 2 are now powered (I'm asuming, as his post doesn't reveal how many speakers are now connected), why wouldn't the other/remaining 2 "slots" work?

Thank you.
__________________
1998 Porsche Boxster
1986 BMW 325es
2012 Ford Edge Sport

"Ignore the guilt, and take your turn"
Starter986 is offline   Reply With Quote
Old 06-05-2019, 06:34 AM   #4
Registered User
 
morgal48's Avatar
 
Join Date: Jan 2014
Location: Texas
Posts: 148
If interested, I've got a Haes 6X40, DSP, and CD changer for sale, individually or as a group. All taken from a 2000S with 42k miles on the clock. Replaced with a Polk 5-ch amp.
__________________
2000 Boxster S
2010 Volvo XC60
2011 GMC Denali HD 6.6L
2008 Cayenne S (sold)
1989 Targa (sold)
morgal48 is offline   Reply With Quote
Old 06-05-2019, 07:50 AM   #5
Registered User
 
Join Date: Jan 2007
Location: BC
Posts: 1,254
Quote:
Originally Posted by rick3000 View Post
you can run the rears off the becker head unit. The hu provides less power, but it still works, i had mine that way until i found a 6x40w amp from a 996.
+1.....................
__________________
2001 Boxster, 5 spd, Seal Grey
clickman is offline   Reply With Quote
Old 06-05-2019, 07:53 AM   #6
There Is No Substitute.
 
rick3000's Avatar
 
Join Date: May 2007
Location: West Coast
Posts: 3,049
Garage
I guess if you only had dash speakers you would have two free channels to power the rears, but I'm still not sure it would work since the door speaker channel might not provide the correct range since the doors are meant to act like woofers. If you already have four speakers (dash and door) and you spliced in the rear speakers your dash speakers would be underpowered.

You can run the rears of the Becker HU and everything will get the correct channels (although the rears will get 15W instead of 40W). And if you want to use a 996 amp it isn't that expensive, a 6x40W amp is around $100-120, be aware that there are two versions of the 6x40W amp.
__________________
1999 Ocean Blue Metallic Boxster - blueboxster.com
rick3000 is offline   Reply With Quote
Old 06-05-2019, 09:18 AM   #7
Registered User
 
Join Date: Jan 2014
Location: New Jersey
Posts: 1,161
As a point of reference, my car came with only the CDR 23 radio and the 2 speakers in the dash, no amp and no door speakers. I installed the factory rear speaker kit that was supplied to dealers and followed the Pelican Parts how-to article on how to do it. My car is a 2003 with the MOST Bus, but the Pelican how-to article is for all years. Adding the rear speakers greatly improved the sound quality, but it would likely be a lot better with a good amp and better speakers.
__________________
2003 S, 3.6 LN Nickies, ARP rod bolts, under-drive pulley, Fabspeed sport headers, Softronic tune, 987 airbox 987 motor mount, Function-First Sport insert & transmission mounts, Ben's short shifter, Nine8Six projector headlights & center caps, ROW M030, stainless flexible brake lines, B-K rollbar extension & fire extinguisher mount, hardtop
PaulE is offline   Reply With Quote
Old 06-05-2019, 01:44 PM   #8
Registered User
 
Cunningr's Avatar
 
Join Date: Mar 2016
Location: Spain
Posts: 820
The problem with that specific amp is the rear channels power door speakers which are subs, and that channel has a frequency filter to only send the bass to the door speakers.

I suggest buying a 6 channel from a cabriolet, then run speaker wires from rear to front. The fader will then work, and the doors still work as subs.

As a note if you spliced front and rear it would affect the speaker load and no fader. If you used the rear channel eliminating doors you would have no upper frequency range.
__________________
2000 Boxster S Ocean Blue Metalic

Last edited by Cunningr; 06-05-2019 at 01:47 PM.
Cunningr is offline   Reply With Quote
Old 06-06-2019, 03:44 AM   #9
Registered User
 
mikesz's Avatar
 
Join Date: Feb 2013
Location: Cranston RI
Posts: 845
Garage
I replaced my amp with a 996 cabby unit as suggested by Cunningr above I then added 6 speakers to the rear deck shelf and replaced door and dash speakers.
__________________
99 Porsche Boxster
mikesz 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 12:40 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, 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