Search found 2075 matches
- Wed Mar 28, 2012 9:33 pm
- Forum: JLM Audio Kits
- Topic: VU BUFFER KIT BUILD THREAD
- Replies: 66
- Views: 301289
Re: VU BUFFER KIT BUILD THREAD
1. i would like to add a second trimpot and ON-ON switch to select between 2 calibration level, -18dBFS = 0dBVU (mixing), and -6dBFS = 0dBVU (mastering), where and how should i put the second trimpot and the switch on the schematic? You would have to switch a second trim pot for the high gain setti...
- Wed Mar 28, 2012 9:06 am
- Forum: JLM Audio Kits
- Topic: VU BUFFER KIT BUILD THREAD
- Replies: 66
- Views: 301289
Re: VU BUFFER KIT BUILD THREAD
For unbalanced signals do you mean tie both the + and - inputs to the signal source, or should one be connected to the source and one to ground? +in to signal center conductor of unbalanced cable and -in to shield of unbalanced cable. If using the circuit with a dual PSU, obviously the half-rail bi...
- Thu Mar 22, 2012 9:43 am
- Forum: JLM Audio Kits
- Topic: 8PAKAMP & 12PAKAMP KIT BUILD THREAD
- Replies: 125
- Views: 391346
Re: 8PAKAMP KIT BUILD THREAD
Hi,... Can we cut/transform the 8pakamp pcb to 2x4pcb´s to a different boxes, for example? Thanks, Luís If you are very careful you could use a sharp Stanley / utility / box cutter knife to V score the top and bottom of the PCB against a metal ruler several times until the copper is cut and a good ...
- Tue Mar 20, 2012 8:10 pm
- Forum: JLM Audio Kits
- Topic: 8PAKAMP & 12PAKAMP KIT BUILD THREAD
- Replies: 125
- Views: 391346
Re: 8PAKAMP kit BUILD THREAD
Joe...This is great news...I'll be getting my order in post haste. I know you will busy updating this thread with details like transformer details and bridge specs needed. Likewise the hook up notes for bridging and inputs etc. I think the pricing is very reasonable, and from the looks of thing a l...
- Tue Mar 20, 2012 6:02 pm
- Forum: JLM Audio Kits
- Topic: 8PAKAMP & 12PAKAMP KIT BUILD THREAD
- Replies: 125
- Views: 391346
8PAKAMP & 12PAKAMP KIT BUILD THREAD
8PAKAMP kit is a 8 channel version of our popular 60W AMP kit. We originally designed the 8PAKAMP for a large Dolby Labs project we did a while ago. 8 x 75Watts of power configurable for making active monitors or full surround sound amp setups in lots of combinations on 184mm x 81mm PCB (eg 4 x 140w...
- Tue Mar 20, 2012 7:57 am
- Forum: JLM Audio Kits
- Topic: BAN Build Thread
- Replies: 132
- Views: 470131
Re: Switched resistors for gain
Joe, I have 24-position switches, and I'm thinking of implementing 2dB gain steps. Assuming 1% resistors, how well matched would gains be between channels? Thanks! Paul HI Paul Easy one. With all resistors 1% there are 2 gain stages so 4 resistors all with 1% tolerance so +/-4% error. We do find th...
- Mon Mar 19, 2012 8:32 pm
- Forum: JLM Audio Kits
- Topic: BAN Build Thread
- Replies: 132
- Views: 470131
Re: BAN Build Thread
Thanks Joe. That's all very clear. One last question: to cut on the gain attenuator steps (12 or so) I'd like to have a fine gain pot to cover inbetween (5-6 dB). I suppose this could be done tapping into the feedback loop of IC1 but, again, I'm not up to grasp if the DC present will play havoc wit...
- Mon Mar 19, 2012 12:27 pm
- Forum: JLM Audio Kits
- Topic: LA500 opto comp leveling amp BUILD THREAD 500/51X
- Replies: 223
- Views: 634681
Re: LA500 opto comp leveling amp BUILD THREAD 500/51X
Hello Joe, I've recently purchased an LA500 (used, built by someone else) and ran into issues with calibration. I followed the instructions you've outlined methodically. I used a 1kHZ sine tone generated by "Test Osc" in Logic Studio through my Digi 003 interface. When I set it to -18dBFS, which is...
- Fri Mar 09, 2012 10:28 am
- Forum: JLM Audio Kits
- Topic: JLM 60Watt Power AMP Kit
- Replies: 261
- Views: 744187
Re: JLM 60Watt Power AMP Kit
A pair of AMP kits can make a 140w amp for a sub but I do not have a sub filter PCB which should have a 12 to 24dB filter slope.slb1959 wrote:Hi,...
Maybe i need to make 2 or 4 mono amps, but first i like to "see" how sound looks.
Do you have the same pcb to a sub-woofer amp?
Thanks, Luis
- Fri Mar 09, 2012 7:12 am
- Forum: JLM Audio Kits
- Topic: JLM 60Watt Power AMP Kit
- Replies: 261
- Views: 744187
Re: JLM 60Watt Power AMP Kit
Hi,.. "Yes JLM Audio web shop excepts Paypal" Aceppts or excepts? Woops. Accepts Paypal The Dingo Pup is a good solution for the input module? Yes a dingo pup would allow for balanced in to unbalanced out for volume control and then unbalanced output of volume control to balanced out to drive amps ...
- Thu Mar 08, 2012 9:36 pm
- Forum: JLM Audio Kits
- Topic: INX5 BUILD THREAD
- Replies: 43
- Views: 138599
Re: INX5 BUILD THREAD
A little update to my last review. I´ve used the LA500 on sax last weekend at a show which I frequently mix ( http://www.michaeljacksontributeshow.de/ ). Creamy, easy to dial in and versatile is what I´d call that comp. It was the best sound I had with that player for ages! I´m going to sell my oth...
- Thu Mar 08, 2012 9:24 pm
- Forum: JLM Audio Kits
- Topic: BAN Build Thread
- Replies: 132
- Views: 470131
Re: BAN Details
Hi everybody. I’m interested in some BAN channels but I’ve got some questions, some of them probably pretty basic since I’m only a musician and unfortunately no EE. Sorry for weak English too. 1.Input transistors: I’m interested in jfets, a pair of 2SK389 would need to be matched? And what about 2S...
- Thu Mar 08, 2012 8:53 pm
- Forum: JLM Audio Kits
- Topic: BA BA2 BA4 BAD Dual99v Build Thread
- Replies: 376
- Views: 964236
Re: BA BA2 BA4 BAD Dual99v Build Thread
Hi Joe, Can the DI or it's ribbon cable have something to do with it? I looked at the ribbon and it seems kind of tight in there between the VTX and the back of the DI pcb... There seamed to be a tiny tiny hole pierced in the ribbon by the slightly protruding capacitor legs at the back of the DI pc...
- Thu Mar 08, 2012 8:49 pm
- Forum: JLM Audio Kits
- Topic: JLM 60Watt Power AMP Kit
- Replies: 261
- Views: 744187
Re: JLM 60Watt Power AMP Kit
Hi,... I hope that picture are with better resolution. OK looks right. But are you using the same box and woofers and tweeter as described a few pages back on this thread as this will only work for that exact configuration. Volume control can be done with normal dual 1k to 10k log pot. I can draw h...
- Wed Mar 07, 2012 6:11 pm
- Forum: JLM Audio Kits
- Topic: JLM 60Watt Power AMP Kit
- Replies: 261
- Views: 744187
Re: JLM 60Watt Power AMP Kit
Hi,.. Few weeks ago i repair a Active Speaker from a friend. The amp is a 3xlm3886. Two for the woofers and one for the tweeter. I like to make one pair or two for me. I gone by some of your pcb´s, but the shipping cost,.. :( No sure what you mean about shipping cost as it should only be about $10 ...