The Engl Victor Smolski LTD E646. The kits we offer here are the most distinctive in tonal character, forged from many years of research. Every kit is configured to provide a specific sound/experience.
These are 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 default power tubes for all the Engl Victor Smolski kits are the JJ 6L6GC’s. The JJ 6L6GC 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. They have a great high end presence and a very warm full tone. Right in-between the JJ 6L6GC and the JJ 6V6S in power.
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 Quad of JJ 6L6GC’s by default, one Balanced JJ ECC83S for the phase inverter (V4, farthest from the input jack), along with three Standard JJ ECC83S’s for V1 – V2 – V3.
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 Quad of JJ 6L6GC’s by default, one Balanced JJ ECC83S Gold Pin for the phase inverter (V4, farthest from the input jack), along with three Standard Gold Pin JJ ECC83S’s for V1 – V2 – V3.
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 Quad of JJ 6L6GC’s by default, one Balanced High Gain JJ ECC83S for the phase inverter (V4, farthest from the input jack), along with three Standard Handpicked High Gain JJ ECC83S’s for V1 – V2 – V3.
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 Quad of JJ 6L6GC’s by default, one Balanced JJ ECC83S for the phase inverter (V4, farthest from the input jack), two Standard JJ ECC83S’s for V2 – V3 and one Standard JJ ECC803S for V1 (closest to input jack).
The Gold Pin ECC803S V1 Option Retube Kit uses the Long Plate Gold Pin 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 Quad of JJ 6L6GC’s by default, one Balanced Gold Pin JJ ECC83S for the phase inverter (V4, farthest from the input jack), two Standard Gold Pin JJ ECC83S’s for V2 – V3 and one Standard Gold Pin JJ ECC803S for V1 (closest to input jack).
Note: Engl uses a non-traditional numbering system for tube locations. We have taken the liberty of using a traditional numbering system for the tube chart below with V1 being the input tube.


