Checking out Joe Satriani’s Marshall Amp: JVM410JS
Should you have found yourself out of the loop some time ago guitar-mastermind Joe Satriani had been in the works with with Marshall amps to develop a new line of signature Satriani amps titled the JVM410HJS head which has been modeled after the JVM410H. It’s been a long process in development and the results are finally ready to see the light of day.
While it’s modeled after the JVM410H head Satriani set out to make it different enough and to work most appropriately for his needs. Enter the JVM410HJS head. A 100 watt, 4 channel, tube based head that gives the guitarist the option to select between an OD1, OD2, Crunch, or clean channel. Both OD1 and OD2 channels have a “mid shift” button permitting a shift in the mids to garner a more Satch-specified tone.
Also included are 4 separate noise gates, one per channel, and each with their own designated threshold instead of 4 reverb controls on the original model. The incentive behind Joe’s request to add noise gates was permitting more control in the studio and instead pushed the need for reverb to his pedal chain.
The clean channel also saw some tweaking in that it was designed to replicate the Marshal 6100 clean channel giving Satriani a more desired control over the tonality with distortion pedals. The Crunch channel is the same as the JVM410′s version of Crunch though it includes Marshall’s AFD circuit. The OD channels have been tweaked to push a bit less gain and share the same voicing. It is there that the aforementioned mid shift button comes into play toggling the tone between the new model and the original JVM410 the changes were built upon. The shifting range is naturally around 650khz while off and shifts down to 500khz when on.
It uses EL34 tubes for power, has two master volume knobs, comes with a footswitch to switch between channels and modes. An effects loop is built in and has full MIDI implementation. As of this writing pricing and the official date of availability to the public have yet to be divulged.
Compared To The JVM410H
There are several changes to the tonality and the way the JVM410HJS handles compared to the original. For the sake of it here’s a quick look at the shoulders the upgraded model was built upon.
The similarities include the EL34 tubes, the MIDI and effect loop. While it shares the 4 channels (OD1, OD2, Clean, and Crunch) the difference in them is the way they were wired and designed. From a control standpoint it works the same, but tonally it is different. Most noticeably would be the clean channel’s design not being based off the 6100 and the absence of the AFD circuit in the Crunch channel.
Since this is also the model that the JVM410HJS is based on the mid shift is absent and by extension presumably means the mids by default are closer to 500khz. In place of the 4 noise gates is 4 reverb controls each designated to a specific channel.