the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

1998 Plymouth Neon Expresso, system


Post ReplyPost New Topic
< Prev Topic Next Topic >
trekari 
Member - Posts: 3
Member spacespace
Joined: September 05, 2006
Posted: September 05, 2006 at 6:54 PM / IP Logged  
Hopefully this is a good place to post this question. From the lurking I've done, everyone but myself seems very knowledgeable haha.
I have a 1998 Plymouth Neon Expresso in which I've put in aftermarket sound equipment.
Head Unit: Pioneer DEH-P3700MP (2 pair pre-outs, 2V, 22W x 4 RMS)
Dash Speakers: 3.5" Rockford Fosgate P132Cs, 15W RMS / 30W Peak (400Hz bass blockers installed)
Door Speakers: 6.5" RF T162Cs, 75W RMS / 150W Peak
Rear Deck Speakers: RF T1693Cs, 110W RMS / 220W Peak
Subwoofer: RFP 3410 10" paired to a P160.2 Amp. Speaker is 200W RMS / 400W Peak, Amp outputs 160 RMS 236W Peak
So here's my question - the Pioneer deck says it should be hooked up to 4 Ohm or 8 Ohm speakers, but right now to avoid the factory built-in crossover, I have the Dash and Door speakers wired in parallel (2 Ohms). Supposedly this is a bad thing, so I was looking to get an Amplifier for them. After emailed RF support with the idea of a P450.4 for the Door/Deck speakers and simply running the Dash off the Head Unit still, they responded that I should use a P4004 and wire the Dash/Door speakers in parallel.
My questions are:
Why the P4004 over the 450.4? 4004 is 50x4 RMS @ 4 Ohms and 100x4 @ 2 Ohms, the 450.4 is 60x4 @ 4 Ohms and 110x4 @ 2 Ohms.
Don't both of these solutions end up with way too much power going to the Dash speakers? Remember they can only handle 15RMS, yet even with the P4004, wouldn't they be receiving 100W at full volume?
If someone could please clarify this situation for me I'd greatly appreciate it. As well as whether there is anything inherently 'wrong' with wiring the four 'main' speakers to the amp and leaving the 3.5"s running off the front output of the Pioneer deck.
Thank you
stevdart 
Platinum - Posts: 5,816
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member consistently provides reliable informationspace
Joined: January 24, 2004
Location: Pennsylvania, United States
Posted: September 05, 2006 at 10:04 PM / IP Logged  
Your idea is the way I would go about it.  But I probably wouldn't use those dash speakers at all;  just run the four speakers off the 4channel amp and let the head unit be just a preamp, not an amp.
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
trekari 
Member - Posts: 3
Member spacespace
Joined: September 05, 2006
Posted: September 05, 2006 at 11:56 PM / IP Logged  
Well - I paid to have those 3.5"s installed since it took some modification to make them fit, so I don't want to throw that money away. ;)
Will I be causing myself problems however in trying to balance the output from the amp versus the head unit given the massive wattage difference? (22 max versus 60 max)
How would I go about making sure that the 3.5"s weren't just drowned out, and WOULD they blow if I just wired them in parallel with the 6.5"s? (110RMS @ 2 ohms is the P450.4's output again)
-Jason
forbidden 
Platinum - Posts: 5,353
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: November 01, 2003
Location: Alberta, Canada
Posted: September 06, 2006 at 11:27 AM / IP Logged  
No they may not, you will however need to a add a passive crossover to the 3.5" speakers and shut the bass of that is going into them up around the 800hz mark. This is going to take alot of the damaging energy out of that speaker as the volume starts to come up.
Top Secret, I can tell you but then my wife will kill me.
trekari 
Member - Posts: 3
Member spacespace
Joined: September 05, 2006
Posted: September 06, 2006 at 11:29 PM / IP Logged  
Problem solved, hehe. I just went to BB today and purchased the P450.4 and had it installed to the 6.5"s and 6x9"s
Rated for 60Wx4 @ 4Ohms...birthsheet says it was tested at 103W RMS x4 @ 4 Ohms, lol.
I simply left the 3.5" connected to the front outs of the HU.
Thank you to all who replied. :)

Sorry, you can NOT post a reply.
This topic is closed.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Thursday, October 31, 2024 • Copyright © 1999-2024 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer