SA-8 v.3 In Development : Getting Close ! - Realm of Excursion



Reply
Old 10-27-2014   #1 (permalink)
Sundown Audio Rep
 
Join Date: Nov 2006
Age: 38
Posts: 1,618
Rep Power: 310
sundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossible
Default SA-8 v.3 In Development : Getting Close !

Got my first prototypes in for the v.3 revision of the SA-8 -- it took quite a bit of consideration to figure out how to make some improvements to the design but I think we are on the right track :


* Newly tooled surround with an improved shape / slightly bigger overall size... this is a new shape I have been testing with for a while that is a bit more linear than the old shape. It allows a small but noticeable amount of extra throw.


* We removed the vent ring to reduce the total depth by 10mm -- since this reduces the cooling capability a bit we added gap vents (next photo). I did use appropriately sized drilled vent holes to maintain a degree of pressure in the under-spider cavity to help push air to the gap vents and keep velocity high. I tweaked and tuned the vent hole size on the SD-2 8" model already.

* A second but major benefit is this will help improve QC pass rates by reduced spider to top plate distance; thus reducing the chance for coil tick (fewer yard sale units thus steadier inventory).

* The magnet stack increased to 50mm from 40mm -- and we reduced the back plate from 25mm to 15mm (removed the 10mm bump) to keep overall motor depth the same. A marginal increase in BL will be seen.

* New magnet boot isn't tooled yet but will be for production.


* It's a tight fit in this motor due to the thick shorting ring... to get the surface area I wanted I used 16 gap vents @ 2.5mm each as wider vents wouldn't fit between the pole and shorting ring. Also each vent is flared to keep the flow quieter.

----------

There are a few other tweaks to the way the suspension goes together, standard XL leads, and a few other little tricks in the motor that you cannot see -- all in all should be a nice little upgrade to the SA-8 driver.

I still need to tweak the stiffness a bit as it ended up a bit too stiff on the first two prototypes... so that is still under-way. I expect them to come out some time around the end of the 1st quarter next year (so end of March or so). Until then the v.2 will be in full stock and shipping as normal.
__________________
- Jacob
- Owner,
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
sundownz is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 10-27-2014   #2 (permalink)
Sundown Audio Rep
 
Join Date: Nov 2006
Age: 38
Posts: 1,618
Rep Power: 310
sundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossible
Default Re: SA-8 v.3 In Development : Getting Close !

Woops... brain fart it's actually only 5mm total shallower -- too many protos on the mind! Still a small reduction

Took a photo side by side to show the surround difference too:



__________________
- Jacob
- Owner,
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
sundownz is offline   Reply With Quote Quick reply to this message
Old 11-11-2014   #3 (permalink)
Sundown Audio Rep
 
Join Date: Nov 2006
Age: 38
Posts: 1,618
Rep Power: 310
sundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossiblesundownz has the highest rating we can give - To make it this far is  nearly impossible
Default Re: SA-8 v.3 In Development : Getting Close !

I measured a production v.2 and a newly re-built v.3 with the final compliance side-to-side with the same amount of play time (neither is fully broken-in). Just to compare... looks like we nailed the stiffness based on FS... and we see a drop in Qts due to the higher BL (also higher sensitivity) :


BL^2/RE = 70.17


BL^2/RE = 85.78

-----

I don't trust the Woofer Tester as an "end all be all" of spec measurement either so don't read too far into it... but comparing on the same day back-to-back I can tell if my design goals are being met

The spec on our web-site for the SA-8 v.2 was done with a Klippel machine after full break-in for reference.
__________________
- Jacob
- Owner,
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
sundownz is offline   Reply With Quote Quick reply to this message

Reply

  Realm of Excursion » Vendors » (Sundow

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Realm of Excursion forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Better or close to Fi Btl 15 inch huh_uneedmorebasss Subwoofers 10 04-05-2011 08:30 AM
Draggin gets close to...Dragging... dRaGGin loW Build Logs 19 09-24-2009 10:55 PM
Box too close? swayaudio Subwoofers 12 01-25-2009 11:15 PM
too close? CookinAnBangin Accessories & Electrical 3 05-06-2007 06:14 PM
trunk wont close.. Scarrell Vehicle Discussion / Performance / Modification 3 05-04-2006 10:00 PM

» Amps
A/d/s/
Advent
Alphasonik
Alpine
American Bass
ARC Audio
Atomic
Audio Art
Audio Gods
Audiobahn
Audiocontrol
Audiopipe
Audison
Aura
Autotek
Avionixx
Bazooka
Beyma
Blaupunkt
Boss
Boston Acoustics
Bravox
Cadence
Cascade (CAE)
CDT Audio
Cerwin Vega
Clarion
Clif Designs
Concept
Coustic
Critical Mass
Crossfire
Crunch
DB Drive
DC Audio
DC Power
DEI
Denon
Diabolo
Diamond
Digital Designs
Directed
DLS
Dual
DYnamat
Dynaudio
Earthquake
Eclipse
Elemental Designs
ESX
Eton
Farenheit
Fi Car Audio
Focal
Fusion
Genesis
Ground Zero
Hafler
Helix
Hertz
Hifonics
Hushmat
Image Dynamics
Infinity
Interfire
JBL
Jensen
JL Audio
JVC
Kenwood
Kicker
Knu Konceptz
Kole Audio
Kove Audio
Lanzar
Lightning Audio
Linear Power
MA Audio
Magnat
Marantz
Massive Audio
MB Quart
McIntosh
Memphis
Metra
MMATS
Mobile Authority
Morel
MTX
Nakamichi
Niche Audio
O2 Audio
Ohio Generator
Optima
Orion
Oxygen Audio
OZ Audio
PG Audio
Phase Linear
Phoenix Gold
Pioneer
Polk
Power Acoustik
Powerbass
Powermaster
Precision Power
Profile
Pyle
Pyramid
RadioShack
Rainbow
Rampage
RE AUdio
Rockford Fosgate
Scanspeak
Scosche
Seas
Sony
soundstream
Sparkomatic
SPL Dynamics
Stinger
Sundown Audio
Swiss Audio
Targa
TC Sounds
TREO Engineering
TRU
Tsunami
Ultimate
US Acoustics
US Amps
Velodyne
Vifa
Viper
Visonik
Xtant
Zapco
Zed Audio
Powered by vBadvanced CMPS v3.2.3

Links
Buy car audio
buy & sell car audio stereo equipment. Purchase used amps, subs speakers for sale and buy classified listings for 12 volt amplifier and subwoofer sales forum
Car Audio Forum
Buy car audio, Sell mobile audio, Wholesale 12 volt, automotive community forum, sub sub woofer, speakers, amplifier, amps, car audio forum
DIYMA
diymobileaudio.com is the DIY car audio install forum for automotive quality and spl stereo bass. 12 volt audio installation wholesalers buy amps, subs, double din car audio head unit electronics and ipod blue tooth car alarms at discounted prices
Sound Deadener
Sound deadening, vibration damper, cld tile, damping mat. Anti vibration pads for automotive insualtion damping, CDL mat, sound damping, noise killer, vibration damper sound deadener


All times are GMT -7. The time now is 10:48 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.6.0 ©2011, Crawlability, Inc.
ABMM Powered by Syrian Medical Society
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.