New house, new HT ... - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

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
Thread Tools Search this Thread
Old 12th June 2007, 09:44 AM   #1
diyAudio Member
paulspencer's Avatar
Join Date: Sep 2003
Location: Melbourne, Australia
Default New house, new HT ...

New house, new HT ... with a new set of challenges!

The room is medium sized, approx 4.6m deep x 3.9m wide and 2.75m floor to ceiling.

Floor plan:

Click the image to open in full size.

System schematic:

Click the image to open in full size.

Speakers are Vifa P17 midbass and D25AG dome tweeter in MTM with a passive crossover on open baffle panels approx 400mm wide (Fequal ~ 200 Hz) with 2 x Rythmik Audio DS12 direct servo 12" sealed subs. The OB panels sit on top of the subs. Dimensions shown give cancellation of first front and rear wall reflection.

I have two problems:

1. Normally I have a small amount of hum which becomes a problem if I use the plate amp's high pass (low level outputs)

2. Midrange problem around 600 Hz where sustained notes seem to ring like crazy (I didn't have this problem in a previous room).

I find the ringing is mostly a problem with piano or with midrange horn sounds in the original. An opera singer hitting high notes (not my usual thing) is unbearable. I note that this problem doesn't seem to occur when I go up close to each panel, so this reinforces my thinking that it's a room problem.

Any ideas on how to fix either problem?
  Reply With Quote
Old 12th June 2007, 09:57 AM   #2
Did it Himself
diyAudio Member
richie00boy's Avatar
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Acoustic damping panel(s)?
__________________ my website for UK diy audio people - designs, PCBs, modules and more.
  Reply With Quote
Old 12th June 2007, 12:58 PM   #3
diyAudio Member
paulspencer's Avatar
Join Date: Sep 2003
Location: Melbourne, Australia
I tried a crude attempt. I used what I had on hand as wall treatment - large areas using quilts (3) and blankets draped over large panels. This made the room sound far too dead, the room sounds better bare. The damping didn't fix it anyway, but that may be because it wasn't effective in the midrange, not being thick.
  Reply With Quote
Old 12th June 2007, 03:04 PM   #4
herm is offline herm  United States
diyAudio Member
Join Date: Mar 2002
Location: Pasadena, CA USA
At 600 hertz, the wavelength is about 2 feet.

Are the speakers placed about 2 feet from the side wall AND
about 2 feet from the back wall?

Pull them out into the room a bit and listen.
  Reply With Quote
Old 12th November 2008, 02:50 AM   #5
diyAudio Member
ashok's Avatar
Join Date: Jun 2002
Location: 3RS
Hi Paul,
Did you solve the noise problem ?
Can you put up the crossover schematic for the Vifa MTM ?
  Reply With Quote


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
pcb fab house Bengali Parts 4 8th May 2008 08:30 PM
Any DJs in the house? Netlist Everything Else 23 8th March 2008 11:43 AM
Using a car amp in the house?? imperfectcircle Solid State 8 9th February 2007 04:25 AM
car sub for in house merlinx76 Subwoofers 6 27th February 2005 07:33 PM

New To Site? Need Help?

All times are GMT. The time now is 04:02 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2