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THANK YOU!
We would like to thank you for choosing our PrimaLuna ProLogue Two vacuum tube integrated
amplifier as the heart of your music system. The ProLogue Two is the second member of a new family
of affordable, high-quality tube products. The designers and builders of the PrimaLuna equipment all
have a long history in high-end audio. We feel that it's time to offer a range of affordable audio
instruments that can easily compete with today's most expensive brands.
We firmly believe that our quality level will be a difficult standard for other products in the market to
match.
This PrimaLuna ProLogue amp features:
• Hand-made construction with the finest point-to-point wiring, using workmanship that is equal to or
better than any product you can buy at any price.
• A heavy gauge steel, fully vented chassis with a five coat finish. Each coat is hand-rubbed and
polished.
• Premium parts: toroidal transformer for power supply; custom designed -in conjunction with one of
the most prestigious transformer designers in the USA- encapsulated output transformers for
lowest hum; wide bandwidth for great bass and extended highs; ceramic tube sockets; ALPS
volume control; Nichicon and Solen capacitors; superfast Philips-diode-circuitry; gold-plated
heavy duty WBT style speaker terminals; gold-plated, panel-mounted input jacks.
• SoftStart™ circuit for extended life of sensitive components, plus a reduced chance of tube failure
from thermal shock.
• Adaptive AutoBias™ exclusive to PrimaLuna. This circuit monitors and smoothly adjusts bias
constantly and instantly, reducing maintenance and increasing performance due to the dramatic
reduction in distortion.
• Tube plate fuse to protect the amp output stage. Other amplifiers might need a trip to the shop if a
tube fails; not this one- just plug in a new tube, fuse, and go.
Premium tubes are available from us and other parties if you wish to upgrade. In USA, Upscale Audio's
inventory of New Old Stock tubes is the largest you can find. Elsewhere, independent suppliers can
assist you to make your best choice.
We hope that the PrimaLuna ProLogue Two amplifier will make you want to follow our next steps in
expanding this new range of products. If you have any questions or comments, don't hesitate to
contact us. You can also share your thoughts with others at www.audioreview.com or other review
sites. On the www.primaluna.nl website you will find links to these and other websites. Our prices are
kept low by using word-of-mouth and customer feedback, and we would appreciate hearing what you
have to say about our product. If you need service during or after the warranty period, contact us.
Thanks again for your support!
Herman
van
den
Dungen
DUROB
AUDIO
BV
PrimaLuna
®
ProLogue
Two
Troubleshooting
Some tips:
• No output. Power is on, but power LED is off and tubes do not light up.
Mains fuse is out. Replace fuse as per instructions on page 9.
• No output. Power LED is on and tubes do light up normally.
Plate fuse may be out. Replace fuse as per instructions on page 9.
If the new fuse goes out immediately after replacement, contact us for further assistance.
• Noise coming from one channel.
Noisy tube. First swap the 12AX7 tubes left to right. If noise follows tube swap, than you have
found the problem tube. If noise does not follow, swap the 12AU7 tubes left to right.
• Hum coming from one channel.
Possible bad output tube. Swap the KT-88 tubes in pairs from right to left. If hum follows the swap,
swap the far left and far right tubes. If the hum returns to the original problem channel, you have
found the problem tube. If not, swap the inside KT-88 tubes left to right.
• Noise/distortion coming from both channels.
Tubes may be in need of replacement. Read page 8 for tube basics and replacement options.
If you try these possible solutions and problems persist, contact us or your local distributor for further
investigation.
PrimaLuna
®
ProLogue
Two