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

12 not thumping why?


Post ReplyPost New Topic
< Prev Topic Next Topic >
96gtp 
Member - Posts: 16
Member spacespace
Joined: July 20, 2007
Location: Canada
Posted: July 26, 2007 at 5:39 PM / IP Logged  
Ok finally got it all wired and installed today. The amps come on fine, well they light up. The speakers sound amazing being pushed through the amps. I am loving it. But my SUB is not thumping. The amp light is on. No fuses are being blown. I have the gain set to normal. I opened up the sub box and rewired the subs the same way they were only cleaned it up a bit. When the stereo is going you can hear and feel (with my hand) a very small amount of thumping, but I mean really little.
Here are the specs of my system
SPECS:
ALPINE CDA-9885 HeadUnit
CEA-2006 Power Rating (4Ohm@14.4 V =1% THD+N), S/N 80dBA (Ref: 1W into 4Ohm): 16W x 4
Max Power Output: 45W x 4
Alpine Type R 6x9 SPR69C
RMS Power Output: 100W
Peak Power Output: 300W
Alpine Type R 5.25 SPR13C
Max RMS Power Output: 90W
Peak Power Output: 270W
Alpine Type R 12" Dual Voice Coil SUB
Power Handling Capacity (RMS): 500W
Power Handling Capacity (Peak): 1500W
Alpine V-Power Mono Power Amplifier (for Subwoofer) MRP-M350
700W x 1 (Max)
• 350W x 1 RMS [2 Ω @14.4V (1%THD)]
• 200W x 1 RMS [4 Ω @14.4V (1%THD)]
• Bass Engine (Variable LP Crossover, Bass EQ)
Alpine V-Power 4/3/2 Channel Power Amplifier MRP-F240
- 4/3/2 Channel power amplifier
- Built-in Crossover
- Blue Power Status LED
- 75Wx4 (MAX)
- RMS 14.4V Power
- 100W x 2 [4Bridged (0.3%THD)]
- 50W x 4 RMS [2(0.3%THD)]
- 40W x 4 RMS [4(0.08%THD)]
installerman23 
Copper - Posts: 53
Copper spacespace
Joined: July 08, 2006
Location: United States
Posted: July 26, 2007 at 5:51 PM / IP Logged  
Checked the RCA's? Worth a try, sometimes its easy to get the polarity wrong.
installing, one day at a time..
96gtp 
Member - Posts: 16
Member spacespace
Joined: July 20, 2007
Location: Canada
Posted: July 26, 2007 at 6:33 PM / IP Logged  
installerman23 wrote:
Checked the RCA's? Worth a try, sometimes its easy to get the polarity wrong.
Ok I went out and switched them around. I now have some sound and movement. But the sub is giving off alot of cracking. And it shuts down as if it turns off at about level 15 on the Volumn. But the light is still on the AMP and no blown fuses.
Does this sound like the sub is shot?
Alpine Guy 
Platinum - Posts: 2,478
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: October 18, 2003
Location: Canada
Posted: July 26, 2007 at 7:35 PM / IP Logged  
Is your sub output on the head unit turned to on?
2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.
96gtp 
Member - Posts: 16
Member spacespace
Joined: July 20, 2007
Location: Canada
Posted: July 26, 2007 at 10:34 PM / IP Logged  
Alpine Guy wrote:
Is your sub output on the head unit turned to on?
Yup that was the first thing I did with the HU. I also turned off the internal AMP
aznboi3644 
Gold - Posts: 2,600
Gold spaceThis member consistently provides reliable informationspace
Joined: May 01, 2006
Location: United States
Posted: July 27, 2007 at 2:20 PM / IP Logged  
how is the sub wired?? What impedance??? How is your gain set?? Boost??
willdkartunes 
Copper - Posts: 250
Copper spacespace
Joined: February 01, 2006
Location: United States
Posted: July 27, 2007 at 10:22 PM / IP Logged  

aznboi3644 wrote:
how is the sub wired?? What impedance??? How is your gain set?? Boost??

The answer to these questions would really help us narrow in on the problem... I too am curious to hear what you consider setting the gain to "normal" is.

Do whatever makes you happy in life without diminishing the happiness of others
96gtp 
Member - Posts: 16
Member spacespace
Joined: July 20, 2007
Location: Canada
Posted: July 27, 2007 at 11:15 PM / IP Logged  
aznboi3644 wrote:
how is the sub wired?? What impedance??? How is your gain set?? Boost??
I can answer some of these questions.
The sub is wired like this: there are 4 terminals on the sub. the black terminals are individually wired to one red terminal then they are wired to a box connector then on the outside of the connector to the AMP.
Since it is wired this way I would suspect 2 ohms impedance? I dont know about it though as I am just getting into car stereos. The gain is set on the NORMAL setting. There is a min 4v setting then a normal setting and then one more higher. Everything else I have set to just above the MIN settings on the dials.
dwarren 
Platinum - Nominee - Posts: 1,811
Platinum - Nominee spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: December 03, 2004
Location: California, United States
Posted: July 27, 2007 at 11:29 PM / IP Logged  

My money is on the deck, the sub setting isn't right. Change it to sub system two. I think every time I've had to install an Alpine deck with a sub, I check everything, and it's always that stupid setting.

96gtp 
Member - Posts: 16
Member spacespace
Joined: July 20, 2007
Location: Canada
Posted: July 27, 2007 at 11:47 PM / IP Logged  
dwarren wrote:

My money is on the deck, the sub setting isn't right. Change it to sub system two. I think every time I've had to install an Alpine deck with a sub, I check everything, and it's always that stupid setting.

Like I said I turned the subs output to on and turned it all the way to 10 out of 15. If you have the sub output turned off you can not adjust the sub setting cause it does not show up.
But I dont know what you mean by sub system two.
Page of 3

  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
Wednesday, January 26, 2022 • Copyright © 1999-2022 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