Sound Skulptor forums

Build help and troubleshooting => LA502 Optical Compressor => Topic started by: Stefan on September 06, 2023, 04:42:34 PM

Title: Two LA502 with different output levels
Post by: Stefan on September 06, 2023, 04:42:34 PM

Hello everybody,

some time ago I purchased an LA502 (2017 model) and now - because it sounds so great - I purchased another one (2021 model) over eBay. Both units seem to react equally with regards to the Peak setting but the new one has a significantly higher output level (Gain). As I haven't set the units up myself I'm curious to find out if and how I can trim the output level so that it's equal in both units. In the setup guide PDF I only saw the section "GR meter setup" but that doesn't seem to refer to the ouput level. 

Cheers,
Stefan

Title: Re: Two LA502 with different output levels
Post by: JPK on September 07, 2023, 09:03:15 AM

Can you tell me what are the revision number on both units? there have been some design changes over time.

Title: Re: Two LA502 with different output levels
Post by: Stefan on September 11, 2023, 09:33:49 PM

I have the revisions 1.3 and 1.4 (louder)

Title: Re: Two LA502 with different output levels
Post by: JPK on September 13, 2023, 08:58:10 AM

It is normal, the configuration of the gain stage has changed between these 2 versions.
I am sure it is possible to convert a REV1.3 into REV1.4 but it will require quite some tracks cutting and re-wiring.