Newbies questions

[gogsard]

guys, a noobie with a new DVC subwoofer.

according to my sub manual, its a 4 ohm dual voice coil and 300 W RMS. i got a 4 channel 4 ohm amp, 250 W RMS x 4, 500 W RMS x 2 channel. my amp cannot go to 2 ohm.

my question :

1. will it be sufficient to power the sub with only 250 W RMS (not bridge) ?

2. for a DVC, can I power each coil with different channel ? the first coil I will use the left channel and the 2nd coil the right channel.

3. my HU have a subwoofer RCA output. Is it OK if I split it into 2 then connect to the amp ? channel 1 and 2 will be bridge and same with 3 and 4. Then both bridge output I will connect to both DVC. I'm doing this to get the 500 W RMS output.

 

[cacin]

Originally posted by gogsard@Mar 27 2005, 23:14
guys, a noobie with a new DVC subwoofer.

according to my sub manual, its a 4 ohm dual voice coil and 300 W RMS. i got a 4 channel 4 ohm amp, 250 W RMS x 4, 500 W RMS x 2 channel. my amp cannot go to 2 ohm.

my question :

1. will it be sufficient to power the sub with only 250 W RMS (not bridge) ?

2. for a DVC, can I power each coil with different channel ? the first coil I will use the left channel and the 2nd coil the right channel.

3. my HU have a subwoofer RCA output. Is it OK if I split it into 2 then connect to the amp ? channel 1 and 2 will be bridge and same with 3 and 4. Then both bridge output I will connect to both DVC. I'm doing this to get the 500 W RMS output.

[snapback]845250[/snapback]​

Hi,
This is what I get from the net.
Maybe this will give you some idea/answers to your questions.

Dual Voice Coil Woofers:
Dual Voice Coil (DVC) woofers are simply speakers with two voice coils wrapped around the same voice coil former. This allows the speaker to be connected in 2 different ways. With the individual coils wired in series, the resulting impedance will be 2 times the impedance of each individual coil. Wiring the coils in parallel will make the impedance 1/2 the impedance of each individual coil. This means that a speaker with dual 4 ohm coils can be wired to 2 ohms or 8 ohms.

From this statement, it means that you will need to wire your sub in series (since you mention that your amp can't go for 2ohm).

go to www.bcae1.com and have a read on chapter 58.series/parallel Impedance.
Hope this helps.

 

[cacin]

Originally posted by gogsard@Mar 27 2005, 23:14
guys, a noobie with a new DVC subwoofer.

according to my sub manual, its a 4 ohm dual voice coil and 300 W RMS. i got a 4 channel 4 ohm amp, 250 W RMS x 4, 500 W RMS x 2 channel. my amp cannot go to 2 ohm.

my question :

1. will it be sufficient to power the sub with only 250 W RMS (not bridge) ?

2. for a DVC, can I power each coil with different channel ? the first coil I will use the left channel and the 2nd coil the right channel.

3. my HU have a subwoofer RCA output. Is it OK if I split it into 2 then connect to the amp ? channel 1 and 2 will be bridge and same with 3 and 4. Then both bridge output I will connect to both DVC. I'm doing this to get the 500 W RMS output.

[snapback]845250[/snapback]​

Answers for your question:
1. I do believe that the amp is able to power your woofer. The 300W RMS is the maks RMS W that the woofer can handle.

2. I do not think that this is possible. The only way to do this is to bridge the amp and wire the DVC sub properly.

3. I don't think it is necessary to split the RCA output from the HU. I believe the amp has a setting option for 2 / 4 channel input. You can just set it to 2 channel input and only feed the amp with the RCA out from the HU. The output of the amp can be bridged to power the DVC subs. However, I do not think the output will be able to go to 500W RMS as the DVC will be a 8ohm load to each bridged channel of the amp.

Chapter 107. System Diagrams on the www.bcae1.com might also help you on this.

Hope this helps.

 

[gogsard]

thanks cacin for the fedback. about question 3 im not that clear .. im assuimg that u thought I was wiring the DVC serially. and my amp cant go to 8 ohm either

here is a pic what I meant .. hopefully this show a better picture :D

assume its a 4 channel amp. split the rear RCA to 2 output connect to the amp. then i bridge 1 & 3 and 3 & 4 to connect to the DVC.

and thanks for the link .. very useful !

 

[DJThoRmented]

Originally posted by gogsard@Mar 28 2005, 10:48
thanks cacin for the fedback. about question 3 im not that clear .. im assuimg that u thought I was wiring the DVC serially. and my amp cant go to 8 ohm either

here is a pic what I meant .. hopefully this show a better picture :D

assume its a 4 channel amp. split the rear RCA to 2 output connect to the amp. then i bridge 1 & 3 and 3 & 4 to connect to the DVC.

and thanks for the link .. very useful !

[snapback]846256[/snapback]​

Nah http://www.crutchfieldadvisor.com/S-PXXyxNmDAly/learningcenter/car/subwoofers_wiring.html will help ya ;) it shows the wiring diagram answering your question

it did 4 me ;)

 

[cacin]

Originally posted by gogsard@Mar 28 2005, 10:48
thanks cacin for the fedback. about question 3 im not that clear .. im assuimg that u thought I was wiring the DVC serially. and my amp cant go to 8 ohm either

here is a pic what I meant .. hopefully this show a better picture :D

assume its a 4 channel amp. split the rear RCA to 2 output connect to the amp. then i bridge 1 & 3 and 3 & 4 to connect to the DVC.

and thanks for the link .. very useful !

[snapback]846256[/snapback]​

What I actually meant is...
First point:
There is no need for you to split the signals from the HU. I believe your amp has a setting to set whether the input is 2 channel or 4 channel.

Second point:
By referring to the link provided by DJThoRmented, it seems that you will need DVC subwoofers to have a 4ohm load per channel.
as per link DVC x 2.
I am assuming that the link above is only showing one channel.
As you can see, on option 2, the total impendance is 8ohm. Since you plan to bridge it, I think it will be ok.
Can you please provide the model of your amp so maybe we can review the specs and know what setting or configuration is better.

Hope this helps.

 

[lan evo]

start a new topic but no ppl reply so post reply here

my setup

kenwood 45x4 hu
adx 4 channel amp
audio control epic 150 pre amp
dls classis c6 2 way component
lightning audio 12inch

but want to ask some question

1:should i stick to the epic 150 or change to other preamp so can adjust with more flexibility
2:wat is low pass and hi pass?
3:what level shall the gain level set?
4:theres 2 knob at amp x over on/off,wats that?


thanks

 

[cacin]

Originally posted by lan evo@Mar 28 2005, 14:57
start a new topic but no ppl reply so post reply here

my setup

kenwood 45x4 hu
adx 4 channel amp
audio control epic 150 pre amp
dls classis c6 2 way component
lightning audio 12inch

but want to ask some question

1:should i stick to the epic 150 or change to other preamp so can adjust with more flexibility
2:wat is low pass and hi pass?
3:what level shall the gain level set?
4:theres 2 knob at amp x over on/off,wats that?


thanks

[snapback]847094[/snapback]​

1. I do not have answers for this.
2. Low pass means that frequencies below the cutoff point will be passed through. This is usefull for woofer. High pass means any frequency above the cutoff will be passed through. This normally applies for tweeters.
3. The idea is to set your gain to a level that will not cause your amp and speakers into distortion. Set it at a minimum before raising it up slowly until you can hear distortion. But, this is not that easy especially for woofers.
4. This I assume is to use the amp built in crossover. If you have an electronic crossover, there might be no need for you to use the amp's internal crossover. If you don't have one, this can be used as mentioned in answer 2. However, please be carefull as you don't want to send high frequencies to your woofer and low frequency to your tweeter.
Just read the manual (if it comes with one) to better understand the operation of your amplifier.

Hope this helps.

 

[lan evo]

Originally posted by cacin+Mar 28 2005, 19:37 -->
QUOTE(cacin @ Mar 28 2005, 19:37 )
--QuoteBegin-lan evo@Mar 28 2005, 14:57
start a new topic but no ppl reply so post reply here

my setup

kenwood 45x4 hu
adx 4 channel amp
audio control epic 150 pre amp
dls classis c6 2 way component
lightning audio 12inch

but want to ask some question

1:should i stick to the epic 150 or change to other preamp so can adjust with more flexibility
2:wat is low pass and hi pass?
3:what level shall the gain level set?
4:theres 2 knob at amp x over on/off,wats that?


thanks

[snapback]847094[/snapback]​

1. I do not have answers for this.
2. Low pass means that frequencies below the cutoff point will be passed through. This is usefull for woofer. High pass means any frequency above the cutoff will be passed through. This normally applies for tweeters.
3. The idea is to set your gain to a level that will not cause your amp and speakers into distortion. Set it at a minimum before raising it up slowly until you can hear distortion. But, this is not that easy especially for woofers.
4. This I assume is to use the amp built in crossover. If you have an electronic crossover, there might be no need for you to use the amp's internal crossover. If you don't have one, this can be used as mentioned in answer 2. However, please be carefull as you don't want to send high frequencies to your woofer and low frequency to your tweeter.
Just read the manual (if it comes with one) to better understand the operation of your amplifier.

Hope this helps.

[snapback]848016[/snapback]​

[/b][/quote]


thanks for your reply.one more noob question.what is distortion?bunyi pecah?

thanks

looks for more answer

 

[cacin]

Originally posted by lan evo@Mar 29 2005, 17:30
thanks for your reply.one more noob question.what is distortion?bunyi pecah?

thanks

looks for more answer

[snapback]851312[/snapback]​

Yes. In layman terms.
The technical explanation is driving your amp and speakers into clipping. Audio signal is like a sine wave. When you set the gain too high, the amplitude of the wave will be very high to a point where it clips. So, the output to the speakers is a clipped signal. Hmm... quite hard to explain here. Maybe you can go to Basic Car Audio Electronic for more information.

 

[lan evo]

will read more.thanks

 

[gogsard]

hi cacin & djtourmented,

i'm not sure it answer my question .. on im the slow ones .. :lol:

i hope this explains more of the setup

 

[cacin]

Originally posted by gogsard@Mar 29 2005, 20:49
hi cacin & djtourmented,

i'm not sure it answer my question .. on im the slow ones .. :lol:

i hope this explains more of the setup

[snapback]851780[/snapback]​

No problem....
Everyone starts somewhere. :)
Hmmm.... <_< I am not really sure that you can wire your DVC woofer with that config. That is like turning one DVC coil woofer into 2 woofer. I'll look some more and provide you another link when I find it. By the way, how many DVC woofer do you have and plan to use for the setup?

 

[cacin]

Originally posted by cacin@Mar 30 2005, 16:10
No problem....
Everyone starts somewhere. :)
Hmmm....

[snapback]853863[/snapback]​

Found it :)

Go to the link and you will have your answers :)

DVC wiring

 

[gogsard]

I'm using single DVC. I actually manage to get the answer after digging in the Audio Bahn website FAQ. Its a 10" AudioBahn sub.

http://www.audiobahn.com/frame2004.html

Here I quote from the FAQ.

Q: Is it ok to run the voice coils of a DVC (Dual Voice Coil) sub to different channels of an amp?
A: It is acceptable to run the coils off of different channels of an amp. You will need to make sure that you are receiving a mono signal to both inputs on the amplifier; otherwise the sub will be trying to play 2 different signals. This can eventually lead to permanent damage.

looks like, I need bridge channel 1&2 .. 3&4 with the same signal (spliting my rear output into 2). im using a cap ayam amp btw.

 

[gogsard]

Originally posted by cacin+Mar 30 2005, 16:20 -->
QUOTE(cacin @ Mar 30 2005, 16:20 )
--QuoteBegin-cacin@Mar 30 2005, 16:10
No problem....
Everyone starts somewhere. :)
Hmmm....

[snapback]853863[/snapback]​

Found it :)

Go to the link and you will have you answers :)

DVC wiring

[snapback]853897[/snapback]​

[/b][/quote]

thanks a lot for the link man ! it definetly explains everything .. so noowwww .. i need to get a monoblock or 2 channel 2 ohm stable amp .. :huh: more moneyyy ...

 

[cacin]

Originally posted by gogsard@Mar 30 2005, 16:21
I'm using single DVC. I actually manage to get the answer after digging in the Audio Bahn website FAQ. Its a 10" AudioBahn sub.

http://www.audiobahn.com/frame2004.html

Here I quote from the FAQ.

Q: Is it ok to run the voice coils of a DVC (Dual Voice Coil) sub to different channels of an amp?
A: It is acceptable to run the coils off of different channels of an amp. You will need to make sure that you are receiving a mono signal to both inputs on the amplifier; otherwise the sub will be trying to play 2 different signals. This can eventually lead to permanent damage.

looks like, I need bridge channel 1&2 .. 3&4 with the same signal (spliting my rear output into 2). im using a cap ayam amp btw.

[snapback]853900[/snapback]​

Did you manage to get a wiring diagram as well?

This is what I get form JL audio.

http://www.jlaudio.com/tutorials/wiring/

 

[gogsard]

yep .. got it. wheeww ! good thing i ask .. if just go ahead and install might burn the sub or amp ..

should i go for monoblock or 2 channel ? and I believe monoblock is expensive rite ?

 

[cacin]

Originally posted by gogsard@Mar 30 2005, 17:00
yep .. got it. wheeww ! good thing i ask .. if just go ahead and install might burn the sub or amp ..

should i go for monoblock or 2 channel ? and I believe monoblock is expensive rite ?

[snapback]854018[/snapback]​

Yes, I do believe monoblock is quite expensive.
I was just wondering, is it not possible to bridge 2 of the amp channel to power your DVC woofer? Wire the woofer in series and then bridge it. If I am not mistaken, when it is wired in series, you will get a total of 8ohm. Then, when you wire it in bridged mode, it will become 4ohm. Correct me if I'm wrong though. Still learning too. :)

 

[gogsard]

from what i understand, the 8 ohm (serial) or 2 ohm (parallel) value will remain the same if connected to a bridge output. my amp will only have the current to push the 4 ohm coil