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 406 - 8Y
Altec 406 - 8Y
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 3rd August 2017, 02:54 AM   #21
steve jones is offline steve jones  United States
diyAudio Member
 
steve jones's Avatar
 
Join Date: Mar 2002
Location: Vancouver USA
Built an Econowave using the 890C Bolero 406 woofers PRs and cabinet with a $10 JBL CD horn and Selenium DT-220-T CDs on top. Worked like a charm. Did not miss my Model 19s in the livingroom.

"Driven with high output impedance" means a tube amp for optimum dampening for the low Qts woofer.

Last edited by steve jones; 3rd August 2017 at 02:58 AM.
  Reply With Quote
Old 3rd August 2017, 08:25 AM   #22
SMathews is offline SMathews  United States
diyAudio Member
 
Join Date: Sep 2002
Location: Southbury CT
Enclosure suggestion for Altec 406 - Techtalk Speaker Building, Audio, Video Discussion Forum

SMathews
  Reply With Quote
Old 3rd August 2017, 10:50 AM   #23
steve jones is offline steve jones  United States
diyAudio Member
 
steve jones's Avatar
 
Join Date: Mar 2002
Location: Vancouver USA
Just a note that info is for the Altec 406A woofer. Quite a bit different animal from the 406-8Y.

The 406A was a 2" VC, small Alnico slug motor and was crossed over in the 890A&B Speaker at 3Khz to an Altec 3000B multicellular tweeter.

The 408-8Y used in the 890C has s 3" VC, Altec 414 Alnico motor, and was used to 2Khz with a Hepner horn tweeter.

Pretty sure they do not measure the same.
  Reply With Quote
Old 3rd August 2017, 11:02 AM   #24
SMathews is offline SMathews  United States
diyAudio Member
 
Join Date: Sep 2002
Location: Southbury CT
Oops didn't notice they were 406As. Thanks.
SMathews
  Reply With Quote
Old 4th August 2017, 05:10 AM   #25
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Yes, huge difference in specs.......

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 7th August 2017, 08:25 PM   #26
Bobo65 is offline Bobo65  United States
diyAudio Member
 
Join Date: Sep 2011
Default Altec 406-8Y

Quote:
Originally Posted by steve jones View Post
Built an Econowave using the 890C Bolero 406 woofers PRs and cabinet with a $10 JBL CD horn and Selenium DT-220-T CDs on top. Worked like a charm. Did not miss my Model 19s in the livingroom.

"Driven with high output impedance" means a tube amp for optimum dampening for the low Qts woofer.
Hi Steve,

Thanks for sharing.

Did you use the existing Bolero cabinet? Is it the new compression driver that makes the difference? Is the horn/waveguide the same dimensions as the Heppner horn? Did you have to modify the crossover?

I would be driving with a Heathkit AA-151.

Best Regards,
Jeff
  Reply With Quote
Old 12th August 2017, 01:34 AM   #27
Bobo65 is offline Bobo65  United States
diyAudio Member
 
Join Date: Sep 2011
Quote:
Originally Posted by GM View Post
You're welcome!

Well, T/S specs says too low a Qts [< 0.312] for optimal venting, hence the PR, unless driven with a high output impedance to raise it [Qts'], so ideally would be in a large compression horn.

OB will work of course, though needs a helper [sub] woofer to fill in below its upper mass corner [fhm].

fhm = 2*Fs/Qts'

Qts' = Qts + any added series resistance: mh-audio.nl - Home

What I do, recommend for these type specs is a mass loaded [vented] TL = MLTL where net volume [Vb] = Vas, tuning [Fb] = Fs, which uses a TL to mass load the vent, improving the mid-bass some and allowing extension down to Fs, a real plus if driven with a high output impedance, so......

What are you going to use up high and assuming these will be used in a HIFI app, your average seated hear height or whatever height you want the HF at and I'll come up with a cab design.

GM
GM,

Your recommendation covered off on two of my criterion (lower bass, cleaner midrange). I really would be very interested if you could offer an ideal cabinet design for this woofer, and also a tweeter type/configuration, assuming a normal tweeter height for a floorstander (36-40"). My brother is a cabinet maker and could help me with the building of it.

Thanks,
Jeff
  Reply With Quote
Old 13th August 2017, 02:21 AM   #28
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Hmm, almost missed this, didn't get an email update . Sounds like my default 38" will work then........ I can work up basic dims, but no drawing.

How tall, wide, deep can you tolerate? Cab will be around 7 ft^3 based on 3/4"[19] mm BB ply.

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 August 2017, 03:15 PM   #29
Bobo65 is offline Bobo65  United States
diyAudio Member
 
Join Date: Sep 2011
Thanks again GM.Size is not an issue as these would be place in my downstairs listeneing room.Any comments regarding tweeter (types, etc)?Jeff
  Reply With Quote
Old 14th August 2017, 10:04 PM   #30
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
You're welcome! OK, will try to get it done sometime this week [got to do it longhand, don't have Excel loaded].

Not really, I don't keep up with the rapid changes in drivers, just that the little horn's diaphragm is fragile and now with the death of the man that made them, don't know if anyone will continue. I used the nice sounding paper tweeter on a number of small speakers, but there's no direct replacement AFAIK, just cheap knock-offs like found in 'white van' speakers.

If still available, Scan-Speak has/had an alum. dome tweeter that was the only one out of all that I auditioned at several Atlanta DIY Meets back in the early 2000s save a very pricy ribbon.

Anyway, alum. domes, whether horn loaded or not seem to tonally sound best overall to me with Altec components, though a ribbon's 'air' tends to sound good with anything, so these are what I would research if the need arose.

The big problem is the driver specs 95+ dB eff., so the tweeter will likely need to be at least 92 dB and maybe have to match it depending on the room's impact on its wide range performance.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote

Reply


Altec 406 - 8YHide 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
tube B 406 triode dick's cleo 4 suwaned Tubes / Valves 22 27th January 2013 03:29 AM
FS: PCB Accuphase E-406 + PRE HominisNocturna Swap Meet 7 1st November 2011 10:01 PM
WTB Altec 805B and some other altec stuff:) limono Swap Meet 9 11th October 2011 07:54 PM
Altec 811B horns and Altec 414z 12" Speakers xecluded Swap Meet 0 21st September 2008 05:21 AM
Any one here using altec ? Russellc Multi-Way 27 9th March 2003 11:15 PM


New To Site? Need Help?

All times are GMT. The time now is 05:26 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki