Change of Plans
After completing one ASP I started looking seriously at purchasing the drivers. Between the higher cost for Orion drivers and upon reading further about the Linkwitz LX521 I decided to shift gears and build the newer system instead.
It's fascinating how initially I was put off by the appearance of the newer design and how quickly these objections were quashed by a few hundred dollars. Not that I was ever that excited about the appearance of the Orion either!
Here's a table I created for changing an existing Orion ASP to an LX521:
Value |
Location |
Jump |
R48, R308, R540 |
1.1k |
R37 |
1.62k |
Remove R217, Move to R309 |
3.48k |
R31 |
4.22k |
R214 |
2.37k |
R40, R217 |
1.33k |
R53 |
1.96k |
R69 |
2.87k |
R33, R49 |
5.62k |
R51, R55 |
14.7k |
R65 |
21.5k |
R304 |
19.6k |
R57, R58, R208, R211, R221, R222 |
38.3k |
R210, R213 |
31.6k |
R54, R302 |
147k |
R66, R67 |
4.7nF |
C306 |
10nF |
C35, C36, C48, C49, C50, C51, C52, C53, C54, C55 |
33nF |
C61 Remove C73 |
47nF |
Remove C400, Add C43, C47, C73, C208, C210 |
120nF |
C64 |
220nF |
C63 Remove C58 |
|
|
Note: There is a post buried within the resources forum that points out that the value of R40 on the ASP is 2.37k, not 2.87k as indicated in the bill of materials supplied with the documentation. The value is correctly marked on the schematic and mentioned on the Owner Support page.
Redesigned ASP Board
Rather than just complain about the PCB I decided to redesign it. The new board is designed to fit inside an enclosure also housing four power amplifiers - one box for each side.