PrimaLuna ProLogue Five Stereo Power Amplifier (OPEN)

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  • Regular price $1,799.00
  • $1,619.00

PrimaLuna ProLogue Five

Sl. #: 05100582

This is my first journey into the world of tubes, and I am amazed at the difference between this tube amp and the solid state amp that was in my system. All of the music I have listened to through the PrimaLuna tube amp has had more punch and drive compared to my solid state amp, and the bass sounds incredible through the KT-88 tubes.



A limited quantity of new A-Stock/Sealed/Full-Warranty ProLogue Five in silver is now available. Act fast, the black-faceplate version has already sold out!

Want the ultimate? Classic Ultralinear all-tube sound, with all the body and glory that you could ask for. For an additional $250 over the EL-34 equipped Prologue Four, you will get an amplifier that has more power, better bass authority, and a little more air on top, but never edgy.

In addition, the ProLogue Five comes specially equipped with the following upgrades:

  • Upgraded Solen capacitors made in France. The result is an even better midband and wonderful clarity.
  • Fast Recovery Diodes. Resulting in increased definition and detail, especially when the music becomes complex.
  • KT88 Output Tubes. We use the current production copy of the legendary Genalex KT88. The tube sounds wonderful, with tremendous body and punch, while still giving you the warmth and humanity you'd expect from an all-tube amplifier.

The ProLogue Five starts with the same basic topology as the award-winning ProLogue Two integrated amplifier. Further improvements are realized from new driver and phase splitter circuitry. The result is no need for any negative feedback. This means even more natural tonality and better overall musicality.

Like all ProLogue amplifiers, it boasts:

  • Soft-start circuit Extends component and tube life by powering up the amp gently every time you turn it on.
  • Tube plate fuse Protects the amplifier output stage. Other amps may need a trip to the shop if a tube fails. Not this one. Just plug in a new tube and fuse, and go.
  • Adaptive AutoBias Exclusive to PrimaLuna, this circuit monitors and adjusts bias automatically. Each power tube is monitored to stay in a peak operating range. Improved performance and better sound, with distortion reduced by 40 to 50 percent over conventional designs. No need for matched tubes. No bias adjustments. Ever. It also allows you to experiment with different power tubes. Plug in virtually any power tube. Adaptive AutoBias will automatically adjust itself! In addition to EL-34s, you can use 6550, KT88, KT90, 6L6GC, KT66, 7581, EL37, and any of their equivalents.
  • Custom designed output transformers Encapsulated low hum, wide bandwidth for great bass and extended highs. Designed by Marcel Croese and one of the most prestigious transformer designers in the USA .
  • Premium parts . Fully vented chassis, chassis-mounted ceramic tube sockets, Nichicon and Realcap capacitors. WBT style speaker terminals. Gold plated input jacks.
  • Hand made with the finest point to point wiring, with workmanship equal to or better than any product you can buy at any price, period.
  • Chassis made of finely finished heavy gauge steel, and five step automotive quality finish. Each coat hand rubbed and polished. Removable tube cage included no charge.
  • Toroidal power transformer for low hum, and a front end that is dead quiet.
  • Conservative design runs tubes easy for long life.


Owner's Manual


Output: 36 W x 2
Freq. Response: 20 Hz-85 kHz +/- .5 dB
THD: Less than 1 % at full power
S/N Ratio: 89 dB
Input Sensitivity: 810 mV
Input Impedance: 100k ohm
Power Consumption: 225 W
Dimensions: 11" x 7.5" x 15.5" (WxHxD)
Weight: 37.5 lb
Inputs: 1 pair RCA
Outputs: 4 and 8 ohm speaker taps
Tube Compliment: 2 - 12AX7, 2 - 12AU7, 4 - KT88