Tannoy floorstander progress - Page 2 - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

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
Reply
 
Thread Tools Search this Thread
Old 5th September 2006, 03:19 AM   #11
diyAudio Member
 
mpmarino's Avatar
 
Join Date: Jun 2004
Location: Crunchville, where I don't fit in.
Quote:
This must be the Tannoy used in monitor red? SRM 12?
Yes, this is my understanding.

hmm, I don't have a 1mh coil handy nor will I get one real soon. I see where you are going here....

Do you feel this driver should be suitable in this size closed box?
__________________
Crazy Yankee.
  Reply With Quote
Old 5th September 2006, 03:23 AM   #12
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Yes its ok. Please use 5cm thick absorptive material in the back only so to deaden the internal resonances somewhat. What is the input impedance of your bass amp? We can emply BSC by using RC filter in its input. Also give me the front baffle dimensions and the driver center distance from top of box face.
  Reply With Quote
Old 5th September 2006, 03:49 AM   #13
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
In any case a good starting point is to feed your bass amp with 220R//1.5uF in line with signal hot and 1uF from hot to cold just after the aformentioned RC. This will give you 4dB BSC. Reduce your HF amp output by 4dB and listen. See ya!
  Reply With Quote
Old 5th September 2006, 04:05 AM   #14
diyAudio Member
 
mpmarino's Avatar
 
Join Date: Jun 2004
Location: Crunchville, where I don't fit in.
Thanks for your time salas.

I will say that I often swap amps out so depending on the ip imp of the amp would be a mistake as a permanent solution. in fact I usually have balanced inputs. I currently have the Krell Ksa50 Klone in there which I believe to have a 23k input impedance single ended.


baffle:
990mm high
369mm wide

216mm center of driver to top of baffle.

thanks
marc
__________________
Crazy Yankee.
  Reply With Quote
Old 5th September 2006, 04:12 AM   #15
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Good. The values I gave will work. If single ended signal use one network. If balanced signal mirror it. Test. Good luck.
  Reply With Quote
Old 5th September 2006, 04:24 AM   #16
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
...
Attached Images
File Type: jpg bsc.jpg (21.1 KB, 504 views)
  Reply With Quote
Old 5th September 2006, 01:42 PM   #17
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Hi,
those T/S params you posted look very suspicious.

A DC Tannoy with a Qts=0.4 does not seem right, particularly in view of BL=22.

Most of the domestic range tend to have T/S of similar values with Bl=15 to 20 and Qts = 0.2 to 0.25

The 12inch may has a higher Fs but jumping up to 30 from the 22 of a 15inch again seems wrong.

I get the impression the params you have quoted are for a commercial small PA model not a DC type, where efficiency is gained at the expense of deep bass.
__________________
regards Andrew T.
  Reply With Quote
Old 5th September 2006, 02:38 PM   #18
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Quote:
Originally posted by mpmarino
thanks for chiming in GM, I was lonely

So, I'm flying by the seat of my pants. The people over at yahoo tannoy say it's a k3148/k3149
Greets!

You're welcome!

These specs are pure BS and I couldn't reconcile them enough with the extra ones here to be of any use with any degree of accuracy: http://www.hilberink.nl/codehans/tannoy61.htm , so unless I missed something, then without actual measurements the only way to get a tonally balanced FR is to use some form of EQ such as BSC to trade as much efficiency as required to get the desired BW whether sealed or vented. That, or build huge BLHs and damp them down as required.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 5th September 2006, 02:52 PM   #19
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
I don't think the issue is BSC, I've built loads of speakers without it and none were that bad. Also most budget speakers don't have it. Have you checked all drive units are wired for correct phase?
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 5th September 2006, 03:45 PM   #20
diyAudio Member
 
mpmarino's Avatar
 
Join Date: Jun 2004
Location: Crunchville, where I don't fit in.
Thanks all,

Salas, I tried your circuit. Unfortunately no appreciative improvement. I even tried my sony dsp processor's parametric with a slope boosting the lowest bass about 12db and sloping down from there...no good. 5"vifa territory This box can not make bass with this driver sealed up. Thanks so much.

Tried a couple of length vents in the rear baffle based on the TS parameters. More garbage

Andrew and richieboy, thanks I've hoped you would join in

Pulled the rear baffles off.

Except for the resonance it is exactly what I am looking for !

The bass is crisp and tight. The type you can feel in your chest. I dialed a little eq in similar to a LT and they really 'snap'. Although not very deep, I like it. Please remember a sub will come to play..crossed in low.


Plan X is to kill/minimise the resonance.

Other than cabinet mods that I am aware and that you good fellas will suggest, what do you think of a notch filter?



richie, yes all are in phase.
__________________
Crazy Yankee.
  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
Tannoy 609 compared with Tannoy 615 photomusicfreak Multi-Way 4 27th November 2008 10:27 PM
Floorstander Alexnick Multi-Way 11 16th December 2005 06:16 PM
$300 Floorstander bjackson Multi-Way 6 20th June 2005 01:50 AM
Subwoofer in a floorstander octopus Subwoofers 8 14th August 2003 01:13 PM
floorstander Guss Multi-Way 15 26th July 2003 02:00 PM


New To Site? Need Help?

All times are GMT. The time now is 04:52 AM.


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