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

custom 3 way design


Post ReplyPost New Topic
< Prev Topic Next Topic >
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: September 02, 2007 at 10:27 AM / IP Logged  
Im tired of trying to get pre built component systems to properly blend with any subwoofer built these days so im looking for advise here.
My plans: I have a 2003 Chevrolet Avalanche with a 15" TC-3000 that will be receiving 1500WRMS and want to cross it over to accept frequencies between 25hz-70hz, and now for the front stage I have space available to fit an 8" woofer in the front doors in a fiberglass pod, then will be running a 4" or 5" component set son axis in the A-pillars.
Im looking for recommendations on that elusive 8" woofer that can tackle 70hz up till the components kick in, which I still have not decided on a frequency cutoff yet. The woofer must not be too power hungry, and must be able to work in a small box since it will only been in a door pod which if im lucky will be 1/4-1/2 cu.ft sealed, unless there is a woofer out there that would work wonders in an open baffle??
Any recommendations on that 8" woofer??
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.
DYohn 
Moderator - Posts: 10,741
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: September 02, 2007 at 10:58 AM / IP Logged  
Does it have to be 8"?  How about 7"?
Support the12volt.com
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: September 02, 2007 at 9:19 PM / IP Logged  
Humm, I didn't think those were still available. Do you think the extremis will be able to handle the task im trying to achieve? Bass to midbass transition? Since my sub bass is really taken care of and the component system can take it from mid-high.
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.
DYohn 
Moderator - Posts: 10,741
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: September 02, 2007 at 9:59 PM / IP Logged  
Absolutely.  The Extremis functions pretty well as a SUB if you put it in the right enclosure.  It excels between 70Hz and 600Hz.   One problem using it ins a car is the mounting depth is almost 4".  I have used Scan Speak 7" woofers with outstanding results as well.
Support the12volt.com
haemphyst 
Platinum - Posts: 5,054
Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: September 02, 2007 at 11:19 PM / IP Logged  
Speaking from experience, YES, they'll do that well... I have them in my doors, powered by an Alpine PDX4.150 bridged to the pair, for 300W each, crossed at 65Hz, to my sub @ 48dB/octave, and the blend is SEAMLESS... The voice blend to the Vifa 4" mid is fantastic as well, and I'm doing that up at 220Hz, again, @ 48dB. You won't have to get rediculous like I did with your slopes, but it CERTAINLY can't hurt at all! All I'm saying is - "yeah, they'll do it!"
One of the best mid-woofers I have ever heard in my life. Before I put the subs in, I was actually running them as low as 45Hz, IN THE DOORS! You won't be sorry with them!
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
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: September 03, 2007 at 9:12 AM / IP Logged  
What size of enclosure can I run them in? I have heard great things from them in the past when Adire was the talk of the forums. What frequency should I cut the extremis off and let the component set start at? Im looking at either a 4" or 5.25" component set.
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.
DYohn 
Moderator - Posts: 10,741
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: September 03, 2007 at 10:45 AM / IP Logged  

Alpine Guy wrote:
What size of enclosure can I run them in? I have heard great things from them in the past when Adire was the talk of the forums. What frequency should I cut the extremis off and let the component set start at? Im looking at either a 4" or 5.25" component set.

They can  work without enclosures per se, but they work best between .5 and 1 cuft.  You can operate them as high as you like (I built a set of 2-way home speakers using Extremis crossed at 2800Hz - and those enclosures are ported at 32Hz with the Extremis doing all the low end work very nicely.)  The low end extension of your components is what you need to worry about.  Set the Xover point to whatever woofer you end up with based on what the component woofers do well.

Support the12volt.com
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: September 03, 2007 at 2:02 PM / IP Logged  
I just measured everything out and looks like it will have to be open air, I would get about 0.1 cu.ft if I sealed the woofer. Now, am I going to have to make my own crossover for this setup?
I came up with a crossover and drew it in PSpice and will try to attach it, will it work?
ZC7_crossover.jpg
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.
DYohn 
Moderator - Posts: 10,741
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: September 03, 2007 at 2:11 PM / IP Logged  
Uh, no, that won't work.  Check this page for some basics, and then this one.  I suggest as a minimum you include a HP section for your components at the same frequency knee as the LP you use for your new woofer.
Support the12volt.com
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: September 03, 2007 at 5:07 PM / IP Logged  
How about this one? I will be using the built in crossover in the amp to take care of the HP filter around 65Hz since it's adjustable, plan to do a 12db/octave at 500HZ LP so the woofer will see between 65Hz and 500Hz , then a HP 12/octave at 500Hz so the component crossovers will only see the majority above 500Hz. Thats what im trying to accomplish.
5C9_crossover.jpg
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.
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
Friday, March 29, 2024 • Copyright © 1999-2024 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