what size amp for DPL 12 wired for 4 ohm? - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 14th January 2005, 08:02 AM   #1
diyAudio Member
 
crippledchicken's Avatar
 
Join Date: Dec 2003
Location: south east mo.
Default what size amp for DPL 12 wired for 4 ohm?

hi, i have a DPL 12 from Adire in a 142.5 L EBS box with 4" pvc port tuned to 16hz. i was planning on getting the PE #300-804 240 watt amp into 4 ohm and 150 watt into 8 ohm to drive it with. i've been told 150 watts is about all i should push it with due to excursion reasons and that i should run on one coil for 8 ohm load to be safe from over excursion. my question is, would it be safe enough to run both coils for 4 ohm load for a little more spl and extra headroom as long as i'm careful not to over drive the sub? ps. i don't listen at high volume levels any way. thanks for any advice, crippledchicken
  Reply With Quote
Old 14th January 2005, 08:29 AM   #2
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Running just one coil will change the T/S parameters. You would be better off with your suggestion of running both and simply keeping an eye on excursion.
  Reply With Quote
Old 14th January 2005, 08:37 AM   #3
diyAudio Member
 
crippledchicken's Avatar
 
Join Date: Dec 2003
Location: south east mo.
hi there and thanks for your reply. the person i talked to was on another forum and told me that if the second coil was shorted out with jumper, the T/S parameters would remain unaltered? this is my first sub project so, i'm a little confused he he. thanks, crippledchicken
  Reply With Quote
Old 14th January 2005, 06:08 PM   #4
simon5 is offline simon5  Canada
diyAudio Member
 
Join Date: Nov 2004
Location: Québec, Québec
It's me that recommended you to stay below 150W RMS.

I think you should drive the two voicecoils anyway and watch out excursion like richie00boy said.

Driving one voicecoil and shorting the other with a jumper will change the T/S parameters.
__________________
DIYaudio for President !
  Reply With Quote
Old 14th January 2005, 06:54 PM   #5
diyAudio Member
 
crippledchicken's Avatar
 
Join Date: Dec 2003
Location: south east mo.
hi simon5, i'll sure do that and what i'll do is run the sub upside down at first and observe the excursion on various sources before i decide the safest level. i've always been into audio as my main hobby for about 30 years so, i can usually judge when a speaker is being over driven or, getting close. i know those sudden bursts of LF is what needs close attention mainly. i don't listen loud any way and it's mostly music. i thought i would try running the sub off my adcom gfp 565 preamp, using the normal outputs so, i can use the tone controls on the sub which the bass control is at 20hz which might also come in handy to help reduce the chance of over excursion by cutting back on the control if needed especially, on HT. on music, i dont think it will be quite as prone to over excursion. thanks for your help, crippledchicken
  Reply With Quote
Old 14th January 2005, 10:15 PM   #6
diyAudio Member
 
Join Date: Oct 2004
Location: t-dot, canada
Send a message via MSN to xstephanx
I would definately reccomend that amp, i just recieved mine and im very happy. It also has a rumble filter just below the tuning of the EBS shiva, so it should help control excursion too. Using a rheostat across the second coil and leaving one open would allow you to dial the ts parameters very close to that of a dpl being driven with two coils, but it would be very difficult to calculate just how much resistance it would need.

Good luck with that sub! Im sure it will turn out GREAT!

BTW something you may want to look into, some recievers have a built in peak subwoofer voltage limiter, may want to look into that.
  Reply With Quote
Old 18th January 2005, 02:08 AM   #7
diyAudio Member
 
crippledchicken's Avatar
 
Join Date: Dec 2003
Location: south east mo.
Quote:
Originally posted by xstephanx
I would definately reccomend that amp, i just recieved mine and im very happy. It also has a rumble filter just below the tuning of the EBS shiva, so it should help control excursion too. Using a rheostat across the second coil and leaving one open would allow you to dial the ts parameters very close to that of a dpl being driven with two coils, but it would be very difficult to calculate just how much resistance it would need.

Good luck with that sub! Im sure it will turn out GREAT!

BTW something you may want to look into, some recievers have a built in peak subwoofer voltage limiter, may want to look into that.
hi xstephanx, finally got my pc up and running again and noticed your response. yeah, i think i'll be satisfied with the amp and it should arrive tomorow so i guess i'll soon find out. between the rumble filter and, the +/- 10 db. bass control on the preamp at 20hz, along with my normal conservative listening levels, i should be able to control the excursions with no problems. should have it going tomorow i'll let you know the results. thanks, crippledchicken

  Reply With Quote
Old 20th January 2005, 12:10 AM   #8
diyAudio Member
 
crippledchicken's Avatar
 
Join Date: Dec 2003
Location: south east mo.
Quote:
Originally posted by xstephanx
I would definately reccomend that amp, i just recieved mine and im very happy. It also has a rumble filter just below the tuning of the EBS shiva, so it should help control excursion too. Using a rheostat across the second coil and leaving one open would allow you to dial the ts parameters very close to that of a dpl being driven with two coils, but it would be very difficult to calculate just how much resistance it would need.

Good luck with that sub! Im sure it will turn out GREAT!

BTW something you may want to look into, some recievers have a built in peak subwoofer voltage limiter, may want to look into that.
hi there, youre right! the #300-804 from PE is a pretty decent amp. i finally got the sub all together and it seems to be doing a pretty good job. i plan to get the Adire PR15 to go with it latter, and see how that goes. cheers, crippledchicken


  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ill be getting wired here now... phluffy Introductions 2 4th May 2009 04:42 PM
FS: Squeezebox 2 (wired) loddie Swap Meet 0 8th January 2008 04:22 AM
is this wired right? shooto Instruments and Amps 1 17th July 2006 03:47 AM
Deck Outputs Wired Together?? PrecisionAudio Car Audio 2 22nd December 2005 05:51 AM
SE UL OT - primary wired in reverse benny Tubes / Valves 0 29th May 2004 05:10 PM


New To Site? Need Help?

All times are GMT. The time now is 02:50 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2