Posts by LiamThompson

    Nice, you must have had them do something special in the neck, as the GG Charvel is unlike any strat neck I've ever played. It's not as wide as a Ibanez neck for sure, but I prefer more rounded necks. The Suhr Even C being the perfect fit for me.

    I get what you mean and agree with Sam too. It's wider than what I prefer to be classed as perfect for me but it's not near as wide as an RG. I like the width on my EVH and Axis which will be exactly the width you like too.

    No, they are to monitor what the profiled amp might sound like with say the EQ in the front end.


    Say you have a EQ active in slot D, this will feed the EQ to the amp's input as if you have an outboard EQ pedal plugged in but because it isn't an outboard effect placed after the entire Kemper, the EQ isn't "profiled" with the amp.


    As soon as you click to start the profiling process, the EQ is removed from the profiling process.


    Once you have captured the profile and you are ready to refine the EQ is switched back on so you can monitor again with the EQ added. Once you start refining it is removed again........and then turns back on after refining to monitor again.


    Once you are happy and save the profile, the EQ is still present in the RIG and can be switched in or out but is NOT part of the profile of the amp.


    I hope I explained that well!

    I can't remember exactly where in the settings this is, maybe under SYSTEM settings, possibly RIG settings but this option was introduced a number of firmware ago to address this exact issue. I'm at work at the minute so don't have the Kemper in front of me but rest assured the option is there unless you are on a quite old firmware.

    I’m wondering if anyone can help as I think I may have noticed a bug here?


    First of all I’ll explain my routing:

    • Guitar plugged into Kemper Input
    • Direct Out from Kemper to Marshall Head Input (Same as creating a profile)
    • Marshall Speaker Out connected to Suhr Reactive Load
    • Suhr Reactive Load/DI output to Kemper Return (Same as creating a Direct Profile)
    • STOMP D set as DISTORTION LOOP to insert the Marshall before the STACK SECTION on the Kemper
    • STACK SECTION is ON but AMP and EQ are DISABLED, CAB ON to provide my cab emulation
    • EFFECTS STOMPS ON for some delay etc after the Marshall Loop and Cab Emulation
    • KEMPER OUTPUT to PA/DAW

    Basically I’m trying to use the Kemper as a pre and post effects unit with my Marshall head but with cab emulation to send direct (ala Torpedo CAB)


    I’ve used a 4 cable method lots to output to a real cab with the entire STACK section disabled to use the Kemper only for effects pre and post amp using my amps effects loop and it works perfect.


    However when the output is set to include cab emulation and the full path is sent to DAW/PA or whatever the profile (as you have to select a profile as there is no “blank” profiles) I’ve selected colours the tone greatly even though the AMP and EQ section is off. For instance, a dark Orange type distorted profile with the AMP and EQ off still sounds dark and bass heavy whilst a bright clean Fender profile with the AMP and EQ disabled sounds really shrill and fizzy. How is this possible if the AMP and EQ is disabled or am I missing something?? I am also using impulse responses converted with cab maker not Kemper cabs that were part of a merged or studio profile and this is using the same impulse even when the CAB is locked.



    Any insight would be greatly appreciated.


    As quick and simple as I can explain it, 99% certain this is all correct (I think don't hold me to it) as I'm a keen modded Marshall enthusiast.


    • Mark Cameron is an amp tech who used to work in a guitar shop in the USA, the shop purchased a lot of amps from Jose Arrendondo's sister I believe after his death that were left in his shop or uncollected by rock stars after he'd modded them. Mark had a keen interest in the 80's hot rodded Marshall tone of his heros. To him this was like finding a goldmine of great information. He opened up these amps to see what magic was in there and traced/remembered/learned what made it all work. One amp in particular was a Marshall with the badge missing with Atomica sprayed on the front which sounded to him and everyone who heard it as a holy grail of EVH/80's Marshall tone. The rumours were that this was an amp Eddie was working on with Jose before his death that was never finished. Other rumours were it belonged to an LA band called Atomica. But obviously the EVH connection and story makes it all the better haha.


    • Jose Arredondo owned a shop called Arrco Electronics, which fixed electrical appliances like vancuum cleaners etc. He also modded and repaired amplifiers on the side.


    • A little known guy called Eddie Van Halen was friends with Jose and had him service (or mod depending on what you believe) his Marshalls. To help Jose out he "leaked" in a guitar magazine that Jose tweaked his amps.....next thing you know, every LA guitarist is down at Arrco asking for their Marshall's modded.
      Typical Jose mods included:
    • Pre amp tweaking for more gain and tighter more modern gain structure
    • Diode clipping via zenner diodes or transistors
    • Post phase invertor master volume
    • Valve fx loops
    • Insert loops before the cathode follower to be able to act as an extra gain stage if you inserted something like a cranked Lexicon Rack unit in there.
    • Negatve Feedback tweaks
    • Extra master volume control with zenner diode clipping volume positioned before the tone stack rather the typical Marshall post tone stack pre phase invertor


    • Mark Cameron then started to offer his own mods primarily based on Jose's work, giving guitarists the chance to obtain these tones again.


    • Now to your actual question - I'm pretty certain the "Aldrich Mod" is a Marshall JCM/JMP circuit with the pre amp tweaked for more gain and a 4th gain stage added by doing away with the cathode follower and using that side of the 2nd pre amp valve for the 4th gain stage. No cathode follower anymore in the circuit it is now a plate driven tone network. It also has a resonance control added. What I'm not 100% certain on is if it used any diode clipping. If the base for the mod is a non master volume Marshall Super Lead like I'm certain Doug's was the gain stages will need to be cascaded and a master volume added making it basically a JMP Master Volume/JCM 800 amp with tweaks. It is supposed to sound half way between a Mesa and a Marshall.
      There are also John Suhr and Martin Golub versions of the Aldrich mod, which I believe is slightly different, which Doug has used at different times. I think Golub's version uses and extra valve for the forth gain stage and keeps the cathode follower intact although I couldn't swear by this at all.