Dr. Z Therapy Amps

The Dr. Z Therapy Retube Kits.

All of our Dr. Z Therapy 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 Dr. Z Therapy kits are the Special Double Mica JJ 6L6GC-DM’s. The JJ 6L6GC-DM’s follow the classic 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. However you can use the Power Tube drop down to select the The JJ 5881’s these 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 an earlier breakup these are it.

These are all adjustable bias amps and all you need to check and adjust the bias is a bias probe and a Multimeter, or our all-in-one Eurotubes “Pro One” bias probe that reads both the plate current and the plate voltage simultaneously.

The Standard Retube Kit is very close to OEM. The kit includes one matched pair of JJ 6L6GC-DM’s by default, a JJ GZ34S Rectifier tube, one Balanced JJ ECC83S for the phase inverter (V2, closest to power tubes) and one Standard JJ ECC83S for V1.

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 to the Standard or High Gain option. 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-DM’s by default, a JJ GZ34S Rectifier tube, one Balanced JJ ECC83S Gold Pin for the phase inverter (V2, closest to power tubes) and one Standard JJ Gold Pin ECC83S for V1.

The ECC803S V1 Option Retube Kit uses the Long Plate JJ ECC803S in the V1 position. The JJ Long Plate ECC803S has a little lower gain with big thick mids and a little more sparkle in the highs. The kit includes one matched pair of JJ 6L6GC-DM’s by default, a JJ GZ34S Rectifier tube, one Balanced JJ ECC83S for the phase inverter (V2, Closest to the power tubes) and one Standard JJ ECC803S for V1 (closest to input jack).