Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

Altec Lansing
Altec Lansing
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 13th June 2018, 07:57 PM   #1111
jazbo8 is offline jazbo8
diyAudio Moderator
 
jazbo8's Avatar
 
Join Date: Jan 2011
Location: In Transient
Altec Lansing
@floyd carter - I fixed the post for you, but please don’t do it again, as it’s against the Forum Rules to post in all caps.
  Reply With Quote
Old 13th June 2018, 11:16 PM   #1112
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Quote:
Originally Posted by floyd carter View Post
This is my home made k horn = a pair. (actually electro voice georgean from their plans) speakers are altec vott== 15" bass and 511 horn. Outer cabinet is walnut plywood


GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 13th June 2018, 11:23 PM   #1113
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Quote:
Originally Posted by floyd carter View Post
....so I'm faster typing when I don't have to bother with the "shift" key.
Aren't we all! I got a virus, banned plus a bunch of 'hate'/'obscene' emails for doing it on my first internet posting on an audio BB back in '96 . No slack at all........

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 14th June 2018, 03:27 PM   #1114
kec is offline kec  United States
diyAudio Member
 
kec's Avatar
 
Join Date: Mar 2001
Location: SoCal
Quote:
Originally Posted by floyd carter View Post
Haw! I spent years typing on a military "mill". Keyboard is all caps, so I'm faster typing when I don't have to bother with the "shift" key.
then just type in lowercase
__________________
MSI E350IS mITX > Foobar > SPDIF > Denon A7100 preamp > Crown XLS1000 > ?
  Reply With Quote
Old 6th October 2018, 12:05 AM   #1115
gdmoore28 is offline gdmoore28  United States
diyAudio Member
 
Join Date: Apr 2013
Location: Arkansas
Quote:
Originally Posted by Marca7 View Post
The only objection I have at the moment is there seems to be a spike in the upper mid range that can be a little annoying on some music. This is not a cabinet issue since itís all from the HF section of the system, so I will have see if I can work on that next. Any suggestions are welcomed.
Hi Marca,

I'm seeing your post a little late in the process, but wanted to commend you on the job you've done on your build. It holds special interest to me because I just finished my own Altec build a few months ago. In my case, I moved my 416-8Z woofers, 511 horns, and 802D drivers into 6.5 cu. ft. mahogany corner cabs of my own design. I also added a Beyma CP-21F slotted super tweeter to extend the UHF range.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
I think you can eliminate the frequency response anomaly you've described by inserting the Altec 30923 CD equalization circuit between the hi frequency output and L-pad of your crossover network. This network worked perfectly for me, and was designed by Altec specifically for the problem you describe.

GeeDeeEmm
  Reply With Quote
Old 6th October 2018, 02:21 AM   #1116
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Hmm, I missed it too and without more info, all I can think of is that with loading caps there's a big peak at the XO point, so for HIFI/HT it's better overall to leave it off and maybe add an extra hi-pass cap to increase the XO's slope if high power handling is 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 16th December 2018, 07:02 AM   #1117
MrFried is online now MrFried  Australia
diyAudio Member
 
Join Date: Nov 2018
Location: Sydney, Australia
Default Living the dream

Hi All,

Glad I found this thread! I am a longtime Altec enthusiast based in Sydney who was brainwashed as a child by an old family friend of ours who is no longer with us, Brad Sheargold. Now in my 30ís and with money to spend, I am beginning my dream Altec build.

I have part of my dads original Altec setup - yum cha Santana style cabinets with 420-8Bís, reconed by Brad about 20 years ago when one of the voice coils was smoked. At the time dad got a hold of some 902-16B HF drivers and Mantaray horns to pair with the 420/416ís along with a crossover design Brad had written on the back of an old brochure.

I have since got my hands on and restored a pair of 511b horns and matched with a nice Vincent SV237 amp.

Even with the small sealed enclosures, the sound is ... adictive.

I need to build some new wife friendly enclosures to make the most of the 416ís and have been reading the internet over the past month or so. My shortlist at the moment is probably the Stonehenge V due to its narrow and tall profile, but am looking for some guidance on my cost-is-no-object build. The MLTL enclosures look very interesting but may be a bit on the large side for my room. I would mount the 511b on top.

Great to meet everyone and I will be definitely putting this all in a build thread as things progress.
Attached Images
File Type: jpg 2F947B53-7920-4CFE-8A40-E640B63FE3AB.jpg (993.8 KB, 49 views)
File Type: jpg FA70702E-9D23-4760-A1F0-54F983E76C0A.jpg (986.9 KB, 59 views)
  Reply With Quote
Old 16th December 2018, 08:19 AM   #1118
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Greets!

Welcome!

MLTLs don't have to be large per se, it's the driver's specs and owner's bass performance expectations that governs size. They do have to meet a 36" minimum internal height for its 1/4 WL TL pipe action to damp the vent, otherwise it's just a high aspect ratio reflex.

'We' already assume the cab will be at least as wide/deep as the horn and if you want physical VC alignment, then a bit deeper, so all that's left is height, which is normally based on the horn's centerline being at some [averaged] seated ear height or some folk's preference of placing the woofer at this location and angling the horn as desired.

If these are too tall, then what is max height to top of horn?

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 16th December 2018, 08:58 AM   #1119
MrFried is online now MrFried  Australia
diyAudio Member
 
Join Date: Nov 2018
Location: Sydney, Australia
Hi GM,

It is truly an honour to meet a legend such as yourself!

The main issue I want to design around is width, provided I keep a smallish footprint, say the width of the 511b’s, they should be quite versatile in terms of placement.

I have read up on most of the builds of MLTL and other types of enclosures, but the main thing I want to try and leverage is the experience of people like yourself who have been designing and building awesome Altec speakers for such a long time!

When I have a bit of time, I will definitely start a build log with good plans so others can hopefully gain from this experience. I have found a really good cabinet maker over in Western Sydney who used to make up Altec pro audio cabinets in the 70’s and 80’s so I am in pretty good hands.

I quite like the look of the Stonehenge enclosures, so was thinking about interpreting the design and leveraging MLTL characteristics like speaker placement and a slot vent at the bottom of the enclosure.

In terms of dimensions and height, the main thing for me is width, a lot of the MLTL builds I have followed online are really wide. I would be fine with them about 23”, the same *** the horns. They can be quite deep and tall to make up volume. Nice deep bass response is high on the list of positive attributes.

Very keen to hear your thoughts and feedback.

I am fairly lucky that my father inherited a lot of old altec PA gear a few years back. We have been going through it all and have a number of good 816(ish) enclosures with 421-8h and LF drivers, quite a few 511b’s, a pair of 604 duplex speakers and old compression horns like 288c’s and 290’s. Lots of the kit is well worn and in need of restoration, but it means we have kit to make up quite a few sets of nice speakers, as well as having stand-by gear for parties so our nice high end stuff doesn’t get destroyed.

As well as the dream setup for me, I am also going to build up enclosures for the 604’s.

Anyway, thank you for accepting my above mind tsunami and I definitely look forward to speaking further!

Cheers,
Christian

Last edited by MrFried; 16th December 2018 at 09:05 AM.
  Reply With Quote
Old 16th December 2018, 02:46 PM   #1120
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: SW Florida
Altec Lansing
Sounds like quite a collection you've got there. You'll be having some fun in years to come.
__________________
Take the Speaker Voltage Test!
  Reply With Quote

Reply


Altec LansingHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Altec Lansing 604-8L? GeorgeJ Multi-Way 4 21st March 2004 01:35 AM


New To Site? Need Help?

All times are GMT. The time now is 09:40 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki