JLM AUDIO

So I'm a bit of a newbie to this so I apologize if I sound way out of my depth here. I would love to make a stereo HPF and was wondering a few things before buying a few: 1) Is the 0V connection for the Sleeve of a T/S wire? I assume I'd connect both sleeves of the Input and Output wires? Yes both ...

UNDER CONSTRUCTION Ask any questions you have while building the kit here so I can add more info to help GEQ500 EDGE PCB BUILD MAP http://jlmaudio.com/builds/maps/GEQ500_Edge_map.html GEQ500 CONTROL PCB BUILD MAP http://jlmaudio.com/builds/maps/GEQ500_Control_map.html GEQ500 FILTER PCB BUILD MAP htt...

Joe sorry to bother you again. Jensen here in the US has no supply, backordered for long time on the JT-16-A. Could you let me know same info, RLoad, RZobel, CZobel for this model recommended substitute. https://www.jensen-transformers.com/wp-content/uploads/2014/08/jt-115K-e1.pdf Thanks, Joe JT-11...

Hi Joe, I'm planning on feeding (2) GAIN kits from (2) Jensen JT-16-A for MIC pre input. https://www.jensen-transformers.com/wp-content/uploads/2014/08/jt-16-a1.pdf Can you tell me what to fit for CZ,RZ,RLoad,CLoad? Thanks, Joe From the datasheet you linked to Rload is 6k19 = 6.2k Cload is not need...

I saw this PM2k on reverb recently and noticed the yellow labels applied to the modded eqs. Seems super clever. Before I sink some time into creating something like this, I thought I’d check to see if anyone already has a design they’re willing to share. @joe, it’d be amazing if the eq mod shipped ...

Hello, Just curious what is the difference and over all sound quality with this stereo rack version vs two LA500A link together. Besides the obvious of not taking two slots up on my lunch box, which is a good reason for me, lol and its $80 bucks or so more that two la500a's. I know that this rack v...

Hey Joe, 1. Is it possible to achieve an inverted output on one stereo pair by removing and bypassing an IC and it's associated input resistor? Yes each summing stage has an invert stage to return it to same output phase. So if you bypass the invert stage you will be 180 degree out of phase. 2. Is ...

Awesome, thanks Joe. Based on that I think I will do: Pin 1: Chassis Pin 2: 0v Pin 3: 24v Pin 4: 48v Seems like a plan. I always use 5 pin for power if multiple rails so I have power pins in the same place encase a power supply is swapped. A +V being a few volts higher or lower is usually not a pro...

Hi! Just received (and built) a Power Plant 2. Super easy assembly, good instructions, and after trimming the regulators I'm getting a beautiful steady spot on 24/48v on the outputs. Beautiful. I plan to install this into an external enclosure to lower risk of noise/hum in whatever gear I end up po...

Thank you for your input - I think you’re right regarding voltage sag and unregulated supplies. I will give this supply a try when I’ve got the time to open up this project. Thank you! Biggest thing is make sure you use the maths shown on the website to check the filament Watts and hv watts is tota...

Thanks. Went with the 48V power pack and 24v zener diodes in the end. I've used 4mm ply board for the front/back panels of an enclosure (which houses the dingo pup), could I use a metal DC jack given no continuity to the remainder of the enclosure? Yes that would work as long as your 48v power supp...

fragletrollet wrote: ↑

Thu Apr 13, 2023 11:04 pm

And another of the front

Wow that is an amazing build. That is a lot in one box but the layout makes it roomy enough to work on

Let me know if you need any help sorting the Ch 9,10 & 11,12 problem.

Thanks for the reply. Possible to change those zeners to 160V versions? Or add another 20V in series? You need to have some volts to regulate. So if you get 320v unreg (which will depend on the mains voltage where you are and the load on the hv rail) you could probably go to 310v by adding a 10v ze...

Hi folks Wondering if it’s possible to put the twenty 5 twenty op amps in the Peq500a. If so, how did it go? Happy results? The JLM99v opamps can be replaced with Twenty 5 Twenty opamps but it will remove a lot of the low end warmth due to the much faster and tighter tone of the Twenty 5 Twenty opa...

Ok! So I bought multiple GAIN PCB, so I did up another from scratch and works correctly. Thanks for your help with my 1st DIY. ***One question regarding connecting power to (2) units. Series or parallel from your: 48v 25w 520mA Switch Mode Power Supply. ?? Thanks! Joe You can only run multiple gain...