JLM AUDIO

ok, so I have the following setup: power supply V+ V- to respective V+ and V- on board. Live, Active and Earth to respective spots on the power supply I've got an input with the tip to L+ ring to L- (and an SPDT switch to switch the ring to R+ for when I plug a stereo signal in instead of balanced)...

Hi Joe, Build several of your kits over the years. Always a pleasure. Always delivered super quick too! Just trying to work out how to hook up my power supply. I'm using the SMPS 48v 315mA power. Trim pot turned down. Am I right in assuming that the V+ from the power supply is hooked up to the V+ o...

Stereolab kit PCB TOP Build Map http://www.jlmaudio.com/builds/maps/stereolabtopmap.html PCB BOTTOM Build Map http://www.jlmaudio.com/builds/maps/stereolabbottommap.html Stereolab schematic https://www.jlmaudio.com/Stereolab/STEREOLAB%20MP3%20schematic.pdf Power from +/-9vdc to +/-18vdc into V+ 0v V...

Wonderfull,Joe! Looking forward to see the AES/SPDIF options. Is it possible to build it analogue and add digital input-cards(?) later? Best regards from munich, Udo. HI Udo Yes the VUPPM500 edge card pcb can have the AES/EBU card and a few resistors added later to convert it. The module is just a ...

VUPPM500 KIT Build Thread (Under Construction. Build Photos coming in next few days) PCB Component Build maps Display PCB http://jlmaudio.com/builds/maps/VUPPM500_display_map.html MAIN CPU PCB http://jlmaudio.com/builds/maps/VUPPM500_map.html 500 EDGE PCB http://jlmaudio.com/builds/maps/VUPPM500edge...

Hello! Considering using the dingo as an alternative to CAPI`s 2S-LA for an auxilliary send module. How comparable are these two? I mean, both are balanced receiver + post fader gain makeup, right? Yes correct. I`m intruiged by the use of a VCA in the dingo. I am using the Expert Sleepers ES-3 syst...

Hi, sorry for the delay with better pictures. Here they go, hope you can see better. Wires seem to be correct but bad practice to solder the bare wire across the pcb like you have as it can short to other tracks or ground plane under the soldermask if heated to much. Best to stand the wire on to th...

Hi, Joe-- Just finished the BA500 that arrived a couple of days ago from you. The build was a breeze and everything works great! Cool great to hear :-) I purchased the sweepable HPF mini module along with the BA kit with the intent to integrate it in place of the unused DI. Can you throw me some su...

dtrnick wrote:Do you have any specs on the Freed input Transformer T1?

No only what is on the schematic

Joe, My CBS Audimax ll RZ mod is done, and works, but I think I'm running a little hot. At the junction of R39 and R35 I get 299V At the junction of R32 and R30 I get 76V Where R30 joins Pin 9 of J1 I get 61.5V Please advise. Nick Stevens Yes from memory we had to set the mains voltage setting on t...

Hello Joe, I received the parts and performed the mod. Thanks for the ground jumper I was missing! Everything seems to be OK, just wanted to ask if it’s normal for the compressor to take a few seconds to start working again after switching to the new slow attack position? Thanks. Not usually. Send ...

I'm doing the JLM mod on both of my CBS audimax units. All is going well, but I have one question; Your schematic calls for eliminating R34. That being done, does R35 now connect directly to C15C, or is that entire connection eliminated? Thanks, Nick Stevens, Downtown Recording Just R34 is cut out ...

The mod below makes a CBS Audimax II into a fully controllable Mu comp with remote threshold. The threshold and attack and release are in a external box that plugs into the old memory plug on the back panel. Release can be done as shown or with a fixed 3.3Meg resistor and switched capacitors from 1u...

Hello Joe, I received the parts and performed the mod. Thanks for the ground jumper I was missing! Everything seems to be OK, just wanted to ask if it’s normal for the compressor to take a few seconds to start working again after switching to the new slow attack position? Thanks. Not usually. Send ...

Hey Joe, Sorry for the delay. I was doing a bunch of tests. I think I have it figured out, but I want to run this by you. Here's what I observed: -On the right channel, both the PAD and Phase switched caused issues. Sometimes one would cut the signal, sometimes the other, and sometimes in combinati...