I picked up a pair of Electro Voice SP 15's - Page 2 - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 26th November 2012, 07:35 PM   #11
diyAudio Member
 
Join Date: Nov 2012
Location: Repentigny, QC, CND
Hello Freddi, nice to read your post again here......
first i removed the brillance circuit that is 0,20mH and a 2,4uF those are in series with the wipper of the brillance pot connected to one side of the 2,4uF
The pot is 100ohms 5 watts.both sides of the pot are on the plus and minus of the SP15.
That done i knew i used the SP15 as a two way design.
My tweeter is a LPG 26N neodium magnet 92 dB/w/m eff.
Since the SP15 really shoouted stronger, i did use a series resistance with the SP15.
That plays two things, changes the QTS actually raises it, it's an Ok thing for open baffle and trim down efficiency to match my tweeter.
I know that the other way reversed, you trim or pad a tweeter/midrange to match an inefficient woofer, but here it proved to be the solution.
Ididn't wanted to have a 10cu.ft. boxes-i had Altec's 18's in the past- but use a very good driver in OB.
Franly it's great and a fraction of the cost of my PHY-HP.......
Crossovers had to be 6db/oct. for minimum phase error, so i did spread the filter points a bit.
SP15 low cut at 1KHz, and tweeter is 4KHz.
Yeah i see people read this and have questions, in fact the SP15 with the wizzer even so responded quite well to 2KHz.....That make some experimenting with inductors and caps a challenged.

With 845 SET's amps on 8 ohms taps it's so magical! This amp is sensitive to complex impedances curves.
Updated Dynaco ST70 really sings.

I also uses a Sonic Frontiers power2 at 130 watts per channel, only to have more control.
Low freq, responses go low about 45Hz.
With a good matched sub you have a great system.
Attached Images
File Type: jpg IMG_2072.JPG (450.0 KB, 52 views)
  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
Electro-voice SP-12B 12" full range drivers analogKidA Swap Meet 0 2nd October 2011 07:50 PM
Electro Voice SP12B's 503Timber Swap Meet 0 25th August 2011 10:49 PM
Up for Auction - Pair of Electro Voice EVM-12L wboyd Swap Meet 0 26th August 2009 09:39 PM
FREE Pair of Electro-Voice MC12A's HTRookie Swap Meet 1 29th February 2008 08:35 AM
Electro Voice dirtyk777 Subwoofers 1 29th July 2007 12:02 PM


New To Site? Need Help?

All times are GMT. The time now is 10:54 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