Amp Upgrades
Amp Upgrades
Want to add to an amp you already have? Want to add something to an amp you've just ordered? This is the place to do it.
Upgrades Info
NOS Mullard EL34 tube upgrade for ZOTL40 power amp or Z40 Integrated: Available for the ZOTL40 MkI and ZOTL40MkII One of the best mid-range tubes on the planet, improves everything over the stock tubes
Fern & Roby Case Upgrade for ZOTL40 or Ultralinear power amps: New chassis design, featuring low-resonance milled aluminum case designed by Fern & Roby
New Remote Control (2023): New remote control to replace the silver Apple remote control. The unit needs to be sent in for new hardware and/or reprogramming. No new functionality is introduced with this remote control. Available for: MZ3, MicroZOTL Preamplifier, Z10 Integrated, Ultralinear / Ultralinear+ Integrated, & Z40 / Z40+ Integrated
Shipping to LTA is paid for by customer. Return US shipping will be calculated at checkout. International customers, please contact us directly for a shipping quote.
No refunds / returns on upgrades. All upgrade sales are final.
Tubes
We only sell tubes to current LTA customers. If you have an LTA amp and need replacement tubes, please get in touch to see what we currently have in stock.