ohm's question

Home / the12volt's Install Bay / Car Audio / ohm's question (

Topic Closed)

Welcome Guest :)

Members

Next Page > < Prev Topic Next Topic >

john_nading

Member - Posts: 6

Joined: April 12, 2005

Location: United States

Posted: April 12, 2005 at 1:39 PM / IP Logged

i have a rockford fosgate p3001 mono block 2 channel class d amp(none bridgable)... i just bought 2 12" Volfenhag subs with dual voice coils... i have no clue about ohms.. how many ohms do i want to go to each channel for a lot of output and extreme lows? that is my big question... but my other one os how should i be wiring the coils together? i think i know how to wire them so i will get the disired amount of ohms but if anyone will give their inout on these to topics it will be appreciated...

if you want me to give u msn messenger, ask

DYohn

Moderator - Posts: 10,741

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

This member has been recognized as an authority in Electrical Theory. Click here for more info.

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

Joined: April 22, 2003

Location: Arizona, United States

Posted: April 12, 2005 at 1:52 PM / IP Logged

Your amp is MONO which means it has one channel of output. It may have two sets of connectors, but they are paralleled together inside the amp. Your amplifier is stable to 2-ohms net load which means you cannot safely connect any load lower than that to the amp. You say the woofers you purchased are DVC. How many ohms per voice coil?

Support the12volt.com

john_nading

Member - Posts: 6

Joined: April 12, 2005

Location: United States

Posted: April 12, 2005 at 7:16 PM / IP Logged

Voice Coils: 4 Layer Dual 4 Ohm... I have a paper that i got with my amp says its rated power is 300 w rms X 1 @ 2 ohms...it has 235 rms watts per channel @ 4 ohms < 1% THD+N...s/n >80 dBA (reference: 1 watt into 4 ohms).... 389 total rms watts @ 2 ohms < 1% THD+N all channels combined the underline info is straight for sheet i got when my amp was tested.. i dont know if it helps but it might... do you need any other specifics?

if you want me to give u msn messenger, ask

forbidden

Platinum - Posts: 5,352

Joined: November 01, 2003

Location: Alberta, Canada

Posted: April 12, 2005 at 8:38 PM / IP Logged

To safely use these subs with this amp wire the subs in this method ONLY.

Wiring Option #2

Top Secret, I can tell you but then my wife will kill me.

DYohn

Moderator - Posts: 10,741

Joined: April 22, 2003

Location: Arizona, United States

Posted: April 12, 2005 at 8:40 PM / IP Logged

Nope, that's great. You will need to accomplish a series-parallel wiring to create a 4-ohm load on the amp. Like this:

ohm's question -- posted image.

Support the12volt.com

forbidden

Platinum - Posts: 5,352

Joined: November 01, 2003

Location: Alberta, Canada

Posted: April 12, 2005 at 8:43 PM / IP Logged

Don't look at his diagram, mine looks nicer. ohm's question -- posted image.

Top Secret, I can tell you but then my wife will kill me.

john_nading

Member - Posts: 6

Joined: April 12, 2005

Location: United States

Posted: April 12, 2005 at 8:51 PM / IP Logged

DYohn.... the diagram shows only using one "channel" should i wire as though i am wiring one dvc in each channel? ... i have been told that i cannot bridge.. so should i wire as show or would it be better to wire seperately?

if you want me to give u msn messenger, ask

john_nading

Member - Posts: 6

Joined: April 12, 2005

Location: United States

Posted: April 12, 2005 at 8:54 PM / IP Logged

haha forbidden... i have that web page one my favorites already... im trying to understand it...and find out if i should wire subs together or seperate..

if you want me to give u msn messenger, ask

DYohn

Moderator - Posts: 10,741

Joined: April 22, 2003

Location: Arizona, United States

Posted: April 12, 2005 at 9:00 PM / IP Logged

The Rockford Fosgate Punch P3001 only has ONE channel. It does not matter which + and - connection on the amp you use.

And you're right, Rob, your's is nicer. Mine is bigger, though. ohm's question -- posted image.

Support the12volt.com

john_nading

Member - Posts: 6

Joined: April 12, 2005

Location: United States

Posted: April 12, 2005 at 9:07 PM / IP Logged

so should i use the other set of connectors at all?

if you want me to give u msn messenger, ask

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.