wiring 2 4ohm subs

Home / the12volt's Install Bay / Car Audio / wiring 2 4ohm subs (

Topic Closed)

Welcome Guest :)

Members

Next Page > < Prev Topic Next Topic >

russell2342

Member - Posts: 5

Joined: March 26, 2010

Location: Oklahoma, United States

Posted: March 26, 2010 at 9:48 PM / IP Logged

Hi guys I'm working on wiring my subs. I have 2 memphis pr15d4 subs with a cadence TXA 3004 amp. The amp Specs are:

4 Ohm RMS Power: 4 x 75 Watts @ 13.8 Volts

2 Ohm RMS Power: 4 x 150 Watts @ 13.8 Volts

4 Ohm Bridged RMS Power: 2 x 300 Watts @ 13.8 Volts

Frequency Response: 20Hz - 30kHz

Damping Factor: >200 @ 100Hz

S/N Ratio: >100 db

Channel Seperation: >65dB

Minimum THD: <0.05%

Dimensions: 17" x 9.2" x 2.12"

High Speed Mosfet Power Supply

Studio Grade Bipolar Output Stage Transistors

Fully Adjustable 18dB/Octave Crossover

Fully Adjustable Bass and Treble EQ Controls

Adjustable Input Gain 170mV-5V

Ultra Reflective Chrome Top Cover

2 Ohm Stereo Stable

4 Ohm Mono Bridgeable

3 Channel Mixed-Mono Capable

Power and Protection LED Indicators

Full IC Controlled Protection Circuitry

Mute and Soft Delay Circuitry

Lucite Encapsulated Terminals

Whats the best way to wire my subs to get the most power outta my amp?

Thanks :)

i am an idiot

Platinum - Posts: 13,667

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: March 26, 2010 at 10:34 PM / IP Logged

Are you using all 4 channels for the woofers? Or are you using 2 channels for Dash/Door/Rear deck speakers?

Are your speakers single or dual voice coil drivers?

russell2342

Member - Posts: 5

Joined: March 26, 2010

Location: Oklahoma, United States

Posted: March 26, 2010 at 11:22 PM / IP Logged

Im running subs only and want to run the most power available from the amp. They're dvc subs. I only wanna use 2 channels at most

ianarian

Copper - Posts: 516

Joined: April 24, 2009

Location: California, United States

Posted: March 27, 2010 at 3:05 AM / IP Logged

Well, unfortunately you are mismatched to be able to use the amps highest potential. You cant run L+R channels bridged to 2ohm (sub/parallel). Your only wiring options are parallel to 2ohm stereo,(sub/parallel/Lch)(sub/parallel/Rch)- on either front or rear channels, or you can run the subs in series/bridged to both F+R sides. Both options equate to the same, sound wise. Either way, as soon as possible, upgrade.

This is what I do for FUN!

russell2342

Member - Posts: 5

Joined: March 26, 2010

Location: Oklahoma, United States

Posted: March 27, 2010 at 5:13 PM / IP Logged

this is not something i have alot of money in or concerned with upgrading. it is a small system for the family car, thats all. my other system in my truck will be massive. this one is just for some bump not a tremendous amount of BOOM, ya know.

i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: March 27, 2010 at 7:46 PM / IP Logged

I do not understand the statement, "I want to use 2 channels at most" Do you want to run your 4 channel amp as a 2 channel, or do you plan to do something else with the other 2 channels? I really need to know that info to help you.

russell2342

Member - Posts: 5

Joined: March 26, 2010

Location: Oklahoma, United States

Posted: March 27, 2010 at 9:49 PM / IP Logged

i am an idiot wrote:

Do you want to run your 4 channel amp as a 2 channel

Correct

stevdart

Platinum - Posts: 5,816

This member has made a donation to the12volt.com. Click here for more info.

This member has been recognized as an authority in Mobile Audio and Video. Click here for more info.

Joined: January 24, 2004

Location: Pennsylvania, United States

Posted: March 27, 2010 at 10:43 PM / IP Logged

If your concern is to get maximum power from the amp, then use just one coil on each sub so that impedance is 4 ohms. Bridge channels 1 and 2 to sub 1 (one coil). Leave the other coil unused. Do the same with the other two channels and the second sub. (The subs are not wired together but used separately with each set of channels.)

Should yield slightly more than "just some bump". ;)

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

nodiggie

Copper - Posts: 69

Joined: August 19, 2009

Location: California, United States

Posted: March 28, 2010 at 12:04 AM / IP Logged

Correct me if I'm wrong. Those subs are 250/500rms peak. Keep in mind if you wire only one voice coil you are good for 125/250rms max. Your amp (if rms rating is correct) will be pushing 300rms to each sub now using 1 voice coil with lower 125rms rating.

If this is true, it will work fine but you will need to take serious care not to over power them and start melting the coil.

Still learning

Kraco

i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: March 28, 2010 at 2:26 AM / IP Logged

Using only one coil of a dual voice coil woofer does not cut it's power handling in half, it is closer to only a 25% decrease in power handling.

You next best option would be to wire the voice coils of each speaker in series. Then bridge on speaker per pair of channels for an 8 Ohm bridged load. The amp will not produce as much power this way, but you will be able to sleep better knowing you should not be able to damage the speakers.

Next Page >

Printable version

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

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.