Hi all! Custom amp builder in SoCal that just stepped into this world!

  • Okay, I didn't JUST step into this world. I saw the Kemper at NAMM a few years ago and thought "oh right, another amp sim", but on closer look, I found it fascinating and I confess I've been using you guys as the incubator/guinea pigs until I knew the KPA was as advertised.


    I'm a composer/music editor/engineer/guitarist, but not a gear junky, at least not a new-fangled gear junky. I've been building homemade amps for about 15 years. I have a habit of designing and building new amps and then after a year, out of frustration, I pull them apart to "rebuild them", but every single time I wish I still had that old 8xEL84 I built when I was 22 that kept crapping out on me on tour. So the Kemper is not just an amp and studio tool for me, but also insurance that I'll still have that sound 10 years from now, and that's priceless. Also, I've only had it four days and I'm already inspired to build more, just so I can profile, archive, and share with everyone.


    I expected there to be a steep learning curve, or at least a lot of trial and error with profiling, but the first amp I sent the aliens through I must have hit a bullseye. I actually couldn't believe it. I had to walk to and from the iso booth a couple times to be sure that Mr. Kemper wasn't lying to me. I've had so much fun the last couple days that I had to post here. And that's a testament, because I have a phobia of forums (I seem to always be posting in the wrong place or not searching properly before inquiries).


    I was still dubious. I thought maybe the gain and eq controls don't work very faithfully, and, well, they don't! But most of my workbench is covered with single volume minimal tone stack amps anyway, and the first sound I get out of a profile usually sounds right immediately. Once I go tweaking is when things start to get a little weird.


    And I was dubious yet still...thinking that maybe this is one of those pieces that sounds great in the box, but probably don't translate so well in the mix. So this evening just for fun I replaced all the guitars from one track with the kemper profiles of the same amps (that I had just profiled in the same room with the same mics). And, as a crusty old tube tech, it was hard to admit that I didn't have to do much mixing at all. All the tones were right there in my face.


    The one thing I notice, and maybe you guys can help me with this, is that it seems like the kemper is doing some kind of limiting. When I play lightly, the level is still loud (gain sounds fine), and if I transition into heavier thick power chords the level is the same. It sounds right on playback, but I can even see in the waveform display that I'm not getting much of a fade or swell (i.e. if I gradually play from soft to loud). There might be some sensitivity parameter that I still need to figure out.


    It won't replace an amp with a guitarist in the same room; there's just no way to get that nuanced feedback. But for amp-iso situations, which seem standard practice now anyway, it's -- *a-hem* -- perfect. So far. It will be a blessing when the next band comes through to redo guitars. I won't have to give them talk about how the amp won't sound the same because of el nino or because mercury is in retrograde.


    Anyway, thanks for welcoming me! I finally may own an amp simulator that doesn't make me throw up a little bit in my mouth. Might have to have to look at an LCD screen from time to time, but I'll live...


    Looking forward to sharing some of my frankenstein amp profiles with the unwary. If there are any tinkerers out there like me, please say don't be a stranger.

  • The one thing I notice, and maybe you guys can help me with this, is that it seems like the kemper is doing some kind of limiting. When I play lightly, the level is still loud (gain sounds fine), and if I transition into heavier thick power chords the level is the same. It sounds right on playback, but I can even see in the waveform display that I'm not getting much of a fade or swell (i.e. if I gradually play from soft to loud). There might be some sensitivity parameter that I still need to figure out.


    Hi and welcome jjbyron.
    it's not as crude as limiting :) the Clean Sense parameter INPUT section is probably >0dB
    this is actually a feature, since it is very desirable in a live context to be able to turn down the volume pot on the guitar or just pick lightly to get a cleaner signal, without sacrificing volume. If you don't want that - put the Clean Sense to 0dB.
    Also make sure that the Compression parameter in the AMPLIFIER section is at 0 - it does a similar thing.


    edit:
    a clean signal will pretty much always have higher peaks than a distorted one, while the distorted one will seem louder.


    It won't replace an amp with a guitarist in the same room;


    it already has in many, many instances ;) it's all about ampin the room vs. close mic'ed over a studio monitor. to get more amp in the room use the Pure Cab parameter (it's in the OUTPUT section - the tick box must be checked first), or switch off the CABINET and play the Profiler over a guitar cabinet.


    there's just no way to get that nuanced feedback


    why not? feedback is just about volume, proximity and position of the pickups to the speaker


    hope to see a few of your creation in the Rig Exchange! :)

  • Quote from jjbyron: “The one thing I notice, and maybe you guys can help me with this, is that it seems like the kemper is doing some kind of limiting. When I play lightly, the level is still loud (gain sounds fine), and if I transition into heavier…




    You are right, it might work fine with the desk monitors cranked loud enough. However, many guitarists I work with sound and play differently when they are standing next to their amp (on the floor) with the pickups moving around. I assume they get used to controlling those feedback sounds by the way they move, and I don't expect it to be the same in a monitoring environment. The interaction between guitarist, pickups, amp, and blasting cab all in close proximity seems like a difficult thing to replicate. But I will share whatever I find. I'll be pleasantly surprised if I can replicate that scenario.


    Thanks everyone for the warm welcome!

  • excellent story , it's always a pleasure to read how a guitarist got their 1st contact with the KPA, and how it feels to try a total game changer ...


    Anyway I understand you about the real amp interaction, and the fact that standing in front of a 4x12 is really reassuring in live venues.


    I had some very similar experience with my hollow guitar and my HS7 yams (very directional monitors) , I was able to control the feedback pretty well once I fount the right volume and angle , not as classy as Santana in front of his boogie, but fine enough to get some very good feedback pads. Another option is to use an ebow, much easier solution for controlled feedback.


    I have another great profiling experience with an humble G1on ( the 50€ device by zoom) , I was able to profile it and 'merge' it with my best cabs , the results went largely beyond my expectations , and somewhat impossible to reproduce on the G1. The G1 profile would clean up very well for instance , while the real G1 does not clean up at all , you'll just get a decreased volume lol ( check this thread for a trial, rigs are on the rigEX : 'Xmas pudding')


    The whole profiling is somewhat fascinating , since you'll end up with a profile that often tweaks like the original amp wouldn't ( the gain for instance).

  • And just to add, it's not the loud squealy feedback I'm really talking about. It's the nuances of upper harmonics that come through when the pickups are near the cab. Sometimes it is very subtle, just some of the microphonics of the pickups or strings resonating. A note played on a guitar next to a cab just sounds different than one played in the control room. Or often it's the player, just like you can't expect a violinist to play the same way in an anechoic chamber as a cathedral. Some players just play their best when their ears are bleeding, or maybe they have a such lusty relationship with their amp that can't stand to be out of arm's reach (please tell me I'm not the only one, that would be awkward...though it would explain why I'm still single).

  • Thanks for the warm welcomes. I have already started a database of profiles of homemade amps and speakers. It will really be some abused amps, damaged speakers, home built microphones, and odd rooms (I'd love to try my backyard). I trust the rig-exchange community to give me the 1 star ratings I deserve. All in the name of fun and experimentation. My girlfriend still won't understand why I have all that shit in the garage, but hopefully I'll at least be able to amuse some folks on this forum. Stay tuned and thanks for the support! I'll be posting in the 'free rigs and profiles' area.


    Here's a pic of the guts from one of the first 50w amps I built (that I still tour with, and has rarely given me problems believe it or not). Yes, it's chaos, but I was a teenager then. I don't mind getting flamed...my technique has come a long way since then. Profile coming soon for those who care the slightest.

  • Welcome, nice story. - I can totally relate to it though. even after well over 200 amps or so profiled, I still get the WOW factor.. of really? how does it do this! (despite the fact I know how) but thats not the point. - the point is, it does it, and it does it very well, the Kemper does indeed make you really think.. work with it for a while, and when you and the kempoer start working as a team, its a really wonderful thing..


    Here is another good story. - In my studio I record many styles (from blues/country/pop/rock) etc. - and most guitar players are like "dude, I don't like digital crap" I want the real amp tone.. as thats what they are used too.. right? - fair enough... - the most inspiring thing is what happens next!.. - you take there amp of choice/mic of choice to fit the song. - get it just right.. - profile it when they are on a smoke break.


    On the return, just don't tell them, and let them carry on regardless. - until they realise there amp is sitting behind us, unplugged. - you get that "WTF" and then explain.. and they cant _really_ believe it. Kemper then instantly becomes accepted as a real instrument and not just a toy.. with always the same response.. "Man you had me totally fooled"


    So yes, Kemper can be a game changer not just for you, but for all purposes in the recording world.


    Rock on!
    A

  • Thanks for the warm welcomes. I have already started a database of profiles of homemade amps and speakers. It will really be some abused amps, damaged speakers, home built microphones, and odd rooms (I'd love to try my backyard). I trust the rig-exchange community to give me the 1 star ratings I deserve. All in the name of fun and experimentation. My girlfriend still won't understand why I have all that shit in the garage, but hopefully I'll at least be able to amuse some folks on this forum. Stay tuned and thanks for the support! I'll be posting in the 'free rigs and profiles' area.


    Here's a pic of the guts from one of the first 50w amps I built (that I still tour with, and has rarely given me problems believe it or not). Yes, it's chaos, but I was a teenager then. I don't mind getting flamed...my technique has come a long way since then. Profile coming soon for those who care the slightest.



    That's some nice wiring!! Star-grounded - and star-everything else? ;)


    Looking very much forward to hearing some oddball profiles!!!!