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Amp Wiring

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=54032
Printed Date: May 14, 2025 at 1:45 PM


Topic: Amp Wiring

Posted By: kasnar
Subject: Amp Wiring
Date Posted: April 16, 2005 at 1:32 PM

Hi all i am just starting my setup, and have LOTS of questions but i think i get it, ok here's my question, my equipment is this:

Speakers
Pioneer TS-A1680R 50W RMS @4 ohms
Pioneer TS-D160R 60W RMS @4 ohms

Subwoofer
Polk Audio db124DVC 60-360W RMS
Dual 4 ohm voice coil

Amps
Boss Riot 745 100x4 @4ohms
Alpine MRD-M301 350X1 @2ohms

Receiver
Sony CDX F7715X 52x4 - 17x4 RMS

I'm thinking in wiring my speakers individually on each channel of the 4 channel amp, and the woofer in parallel for a 2ohm load on the alpine, what im not sure is if that i will be pushing too much power to the speakers, 100x4 and the speakers have a 50 and a 60 RMS, so do you guys think it could be a problem??



Replies:

Posted By: tcss
Date Posted: April 16, 2005 at 2:20 PM
Two things that should make this OK. First make your Boss amp has a HP X-over and set it fairly high, say 80hz. If your Pioneers would have trouble with this much power it would be on the deep bass end. Second, Boss amps are usually overated on their power specs. I doubt it is actually 100X4 RMS.




Posted By: kasnar
Date Posted: April 16, 2005 at 3:07 PM
Thats what i thought, that the amp (being a cheap one) would not give me all the power as stated, but could yo explain a little further about the the xover and thing im a complete noob on this posted_image how you do that??




Posted By: kasnar
Date Posted: April 16, 2005 at 3:13 PM
Multi-Channel Amp Specifications      

    * Amplifier Type: Multi-Channel
    * RMS Power @ 4 Ohms: 100W x 4
    * THD at 4-Ohm RMS Power: 0.01 %
    * Bridged RMS Power @ 4 Ohms: 250W x 2
    * Speaker Level Inputs: Yes
    * Preamp Outputs: No
    * Built-In Crossovers: HP/LP
    * Bass Boost: 0 - 18 dB
    * Frequency Response: 20-20,000 Hz
    * Signal to Noise Ratio: >105 dB
    * Fuse Rating: n/a

Here are the specs or it, I think it does have the crossover but how do i use it, thats my question, i feel so newbie posted_image




Posted By: kasnar
Date Posted: April 16, 2005 at 3:32 PM
All right i think i got it, what u saying is that i should set the low pass cross over to a setting about 80Hz so the speakers would not have to handle all the bass, good idea considering i'm getting a sub to do that, actually the amp has Variable Low-Pass Crossovers and Fixed 150 Hz High-Pass Crossovers, is that what you mean??

heres a pic of the amp if that helps, BTW thnx for the answer, you gave me a good light on this.

posted_image




Posted By: tcss
Date Posted: April 16, 2005 at 4:17 PM
Yes but switch it ti Hi Pass, leave the bass boost off and adjust the level to 80 hz. Sorry it took so long to answer, I've under a dash most of the day.




Posted By: kasnar
Date Posted: April 16, 2005 at 5:25 PM
Features

    * Slender Aluminum Heatsink
    * Isolated Mounting Feet
    * Mosfet Power Supply
    * Variable Low-Pass Crossovers
    * Fixed 150 Hz High-Pass Crossovers
    * Switchable 18 dB Bass Boosts
    * Switchable Input Sensitivity Mode (100mV-2V / 2V-8V)
    * Line and Speaker Level Inputs
    * Top-Mounted Power and Protection LEDs
    * Includes Wired Subwoofer Level Control


But I have a little question, if the High Pass crossover it's supposed to be locked at 150Hz wouldn't the knob be only to adjust the low pass x-over, well i guess i think that's what it means don't it....




Posted By: tcss
Date Posted: April 16, 2005 at 5:54 PM
You're right. This is a really dumb amp design. The best advice I can give you is to adjust the Alpine's LP x-over as high as you can stand it before it gets to fluffy sounding. Say 120hz . Good luck





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