“I am a big fan of quality integrated amplifiers, as they can provide a huge slice of state-of-art audio performance at a more accessible price point. All of Frank’s amplifiers are custom-built to order and are custom-tailored to an individual customer’s needs and preferences.””
Triode Lab 45 Evo Reference Integrated Amplifier
Years ago, our reference 45 integrated amps weren’t very popular - but things have changed since then ! The return of ultra high-efficientcy speakers - those with efficiencies of 99db and up — has led to our 45 amps quickly becoming one of our big sellers.
It starts off with a 45 design, but has the ability to use a 2A3 as well. Our advanced / non patent-pending Auto-Bias system =) , allows you to safely interchange two of the most famous direct-heated triode tubes, while getting a good sound out of both of these different animals. With the 45 tube in action, the 45 Evo puts out a flea-est but most adorable Class A 2W of triode bliss. This amp is a must have for speakers with a sensitivity over 100 db - it will turn your forward / thin sounding speakers back into proper HIFI units.
To get this result, we have paid special attention to the output transformers. The 45 EVO uses bigger HASHIMOTO output transformers from Japan than the 2A3-EVO, they also run at a higher primary impedance than those we use in the 2A3 EVO, which is now optimal for the 45 tube. As a result, they have a lot more bass and weight, as well as better inductance / damping character for ultra high efficient speakers. The more balanced top to bottom curve of the output transformer design has measured smoothly on our scope, and that will also mean a smoother sounding speaker.
Specifications
45 SET Integrated Amplifier
Class A Autobias 2W / 3W when using the 2A3.
2 Set of Inputs ( Quieter with the middle position of selector switch empty out for sound separation ) , It’s also free to by pass the selector and go straight to the volume control (a lot experienced tube user requests this).
Recommended Rectifier Tubes : 274B / GZ32 / 5V4 / 5T4 for best sound. It can also use 5U4 / 5Y3 / 5R4.
Input / Preamp Tubes 12AX7 (if fewer gain desired , 12AU7/5751 can be used as well) , 6SN7 / CV181.
0-8-16 Ohms Output via CMC USA Gold Binding Posts or CARDAS USA (Whichever available)
Overall gain @ approximately 21.7 db @ 8 ohms - For those who think they know. Input Sens. 350 mV @ Max Power
Coupling caps by Mundorf Germany’s Silver in Oil Caps
More information at:
www.triodelab.com/45-evo-integrated
www.finaleaudio.com/