Hertz ML-5400 D - 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 11th January 2005, 02:52 PM   #1
make72 is offline make72  Finland
diyAudio Member
 
Join Date: Jan 2005
Location: scandinavia
Default Hertz ML-5400 D

Can i made this woofer good(going down and loud) for ht? I have never make diy woofers so can some one help and give some advice?I want loud good woofer. http://www.bigdogaudio.de/pd561831531.htm
  Reply With Quote
Old 11th January 2005, 04:14 PM   #2
simon5 is offline simon5  Canada
diyAudio Member
 
Join Date: Nov 2004
Location: Québec, Québec
I think it will be good for HT, the problem is to power it since it's a 1 ohm driver...!
__________________
DIYaudio for President !
  Reply With Quote
Old 11th January 2005, 05:31 PM   #3
make72 is offline make72  Finland
diyAudio Member
 
Join Date: Jan 2005
Location: scandinavia
Yep i notice that afterward, but can that wired so that resistance is 2.2 ohm? What woofer module amp can take 2ohm?
  Reply With Quote
Old 11th January 2005, 05:58 PM   #4
simon5 is offline simon5  Canada
diyAudio Member
 
Join Date: Nov 2004
Location: Québec, Québec
It seems to be a dual 2 ohms voice coil, so you can drive it with a normal 4 ohms subwoofer amplifier if you plug the coils in series.
__________________
DIYaudio for President !
  Reply With Quote
Old 11th January 2005, 06:44 PM   #5
make72 is offline make72  Finland
diyAudio Member
 
Join Date: Jan 2005
Location: scandinavia
Of course 2ohm per voice coil, sorry.What shoul box be, vented or closed? Adn how much i can get max. spl@ 20Hz from that element and total max spl?
  Reply With Quote
Old 11th January 2005, 09:14 PM   #6
simon5 is offline simon5  Canada
diyAudio Member
 
Join Date: Nov 2004
Location: Québec, Québec
I think vented would match room gain better.

It needs a huge enclosure.

With 400 liters tuned to 19 Hz it looks right, 112,5 dB at 20 Hz without room gain. Maximum SPL is 120 dB without room gain at 100 Hz. You need 290W RMS.

You can put this enclosure smaller, you get a bit more maximum SPL but lose SPL at 20 Hz.

You could get even more SPL at 20 Hz if you build a larger enclosure and abuse with tuning frequency.
__________________
DIYaudio for President !
  Reply With Quote
Old 11th January 2005, 09:52 PM   #7
Hennie is offline Hennie  South Africa
diyAudio Member
 
Join Date: Nov 2004
Location: Pretoria
Unless you already have such a unit, I would not recommend the use of car woofers (even most high end ones) for home use, for the following reasons:

They are usually more expensive due to cosmetics
They are usually less efficient, although the one you linked to is an exception
Fs is often too high (designed for car cabin gain which kicks in much earlier than room gain)
Those that I have tested had much higher 3rd harmonic distortion than home units. I think this is sometimes done deliberately to give a punchier sound with peaky tuning in high SPL situations.
Upper bass response is often poor compared to home sub drivers.
  Reply With Quote
Old 12th January 2005, 08:09 AM   #8
make72 is offline make72  Finland
diyAudio Member
 
Join Date: Jan 2005
Location: scandinavia
Well its quite hard to beat diy woofer this: SVS PB12-Ultra/2 measurements with RadioShack spl meter(analog).
Subwoofer is placed in corner and measure was 3meters distance.
SVS has PEQ, i use it to get straight response as i can.
I use 25Hz tune to get maxim pressures and subsonic filter is 25Hz.


Hz dB Max dB

200 60 97
190 60
180 60
170 58
160 63
150 69 113
140 72
130 63
120 75
110 75
100 79 114
95 70
90 59
85 57
80 65
75 70
70 75
65 78
60 76
55 70
50 76 107
45 85 117
40 86 119
35 86 116
30 88 113
25 87 110
20 79 102
  Reply With Quote
Old 12th January 2005, 11:52 PM   #9
simon5 is offline simon5  Canada
diyAudio Member
 
Join Date: Nov 2004
Location: Québec, Québec
First, did you correct these measurements?

Second, a simple Adire Audio Tempest can beat these results if you build the box correctly. Also, it will go way lower. But then, you'll need a much more bigger box, that's a small compromise for me, but maybe not for you.
__________________
DIYaudio for President !
  Reply With Quote
Old 13th January 2005, 01:11 AM   #10
make72 is offline make72  Finland
diyAudio Member
 
Join Date: Jan 2005
Location: scandinavia
No i didn't so its goes little louder 121.5dB at 40Hz when corrected. Adire Audio Tempest is that good and what about Maelstrom? How much these can put spl? Any good links Tempest or maelstrom projekts?
Attached Files
File Type: txt rsmeter.txt (1.3 KB, 10 views)
  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
taking a W3-871S to 80 hertz Douwe Full Range 86 30th October 2009 07:08 PM
Help!...it hertz crick Full Range 9 2nd July 2007 09:34 PM
Zero hertz jaberwocky6669 Multi-Way 36 16th June 2007 04:59 AM
Difference between Hertz HS-200 and HX-200 FaZ72 Multi-Way 2 8th April 2004 02:34 PM
Hertz or Cycles? Bob2 Everything Else 10 10th June 2003 12:50 AM


New To Site? Need Help?

All times are GMT. The time now is 07:17 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