The Mesa Boogie Fillmore 50. Regardless of your style and application we have you covered!
All of our Mesa Boogie Fillmore 50 full Retube Kits are designed specifically for these amps. Every kit is configured to provide a specific sound/experience.
The default power tubes for all of our Mesa Boogie Fillmore 50 kits are the JJ 6L6GC’s. These tubes follow the classic 6L6GC sonic archetype with big lows, smooth mids and crystalline highs. What sets them apart is their low end clarity, mid-range detail and very clear highs without being overbearing or harsh. Other 6L6 family options include the JJ 5881’s. The JJ 5881’s are a Classic 23 watt 5881 in a traditional stubby bottle. “Jangle” for days and a very warm full tone. Right in-between the JJ 6L6GC and the JJ 6V6S in power. If you’re looking for that early-breakup “tweed” era character these are it.
These amps are fixed bias, there is no bias adjustment to be made. All our Mesa Retube Kits include power tubes that are hand selected to run perfectly in Mesa amps. We have extensive hands-on experience measuring the fixed bias points in these amps and what grade of tubes will achieve optimal performance.
The Standard Retube Kit is as close to OEM as possible. Maintaining the amps stock level of headroom and gain while providing a warm but even handed overall sound. The kit includes one matched pair of JJ 6L6GC’s by default, one Balanced JJ ECC83S for the phase inverter (V3, the third preamp tube away from the input jack) and four Standard JJ ECC83S’s for V1 – V2 – V4 – V5.
The Gold Pin Retube Kit uses the JJ ECC83S Gold Pin variants to provide a smoother, creamier, and more singing overall sound. This option is less aggressive and has less “teeth” when driven hard. If you like a classic raunchy gritty overdriven tone, we recommend looking elsewhere… If sweet, open, and more refined is what you’re after this kit will do it. The kit includes one matched pair of JJ 6L6GC’s by default, one Balanced JJ ECC83S Gold Pin for the phase inverter (V3, the third preamp tube away from the input jack) and four Standard JJ Gold Pin ECC83S’s for V1 – V2 – V4 – V5.
The High Gain Retube Kit uses our hand picked high gain selected JJ ECC83S’s. If you’re looking for maximum crunch and grind this is where you want to be. Sonically this setup is very similar to our Standard Retube Kit but with a little extra gain on tap. The kit includes one matched pair of JJ 6L6GC’s by default, one Balanced High Gain JJ ECC83S for the phase inverter (V3, the third preamp tube away from the input jack) two Standard ECC83S’s for V4 – V5 and two Handpicked High Gain JJ ECC83S’s for V1 – V2.


