PrimaLuna USA Stereo Amplifier ProLogue Five User Manual

PrimaLuna® ProLogue Five  
PrimaLuna®  
ProLogue Five  
Power Amplifier  
Serialnumber  
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PrimaLuna® ProLogue Five  
THANK YOU!  
We would like to thank you for choosing our PrimaLuna ProLogue Five vacuum tube power amplifier  
as part of your music system. The ProLogue Five is the second tube power amplifier of our 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 power 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 five coats of 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; 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 Five stereo vacuum tube power amplifier will make you want to  
follow our next steps in expanding this new range of products. If you have any questions or comments,  
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  
3
 
PrimaLuna® ProLogue Five  
Specifications  
Power  
36 Watts per channel  
Frequency Response  
THD with AABB  
S/N Ratio  
20Hz - 85kHz +/- 0,2dB at rated power; 4Hz - 110kHz -3dB @ 1W  
<0,1% @ 1W; <1% @ 10W; max 2% at rated power into resistive load  
89 dB (unweighted) ref 1W  
Input Impedance  
Input Sensitivity  
Gain  
100 kOhm  
600mV rms input for rated output power  
28x (29dB)  
Power Consumption  
Net Weight  
125W @ idle; 225W @ rated max. power  
37.5 lbs / 17 kg  
Shipping Weight  
Dimensions  
41.9 lbs / 19 kg  
15.5" x 11" x 7.5" / 395 mm x 280 mm x 190 mm (L x W x H)  
18.3" x 15" x 12" / 465 mm x 380 mm x 305 mm (L x W x H)  
1 pair RCA  
Shipping Dimensions  
Inputs  
Outputs  
4 & 8 Ohm Speaker Taps  
Tube Complement  
4 x KT-88  
2 x 12AX7  
2 x 12AU7  
4
 
PrimaLuna® ProLogue Five  
Warning  
To prevent serious injury, electrical shock or fire:  
Do not operate with bottom plate removed.  
Keep away from rain and moisture.  
Always disconnect all cable connections to and from amplifier before changing fuses and/or  
tubes.  
Do not replace fuses with any fuse other than the same type and rating as used by the factory.  
Do not replace tubes without reading instructions.  
Do not replace fuses or tubes if you have any doubt about your ability to do so. We accept no  
responsibility for any personal or material damage due to incompetent use or users.  
Package Contents  
ProLogue Five Amplifier  
Power Cord  
1
1
This Owner's Manual  
White Gloves  
1
1 pair  
Tube Complement  
2 x KT-88  
2 x 12AX7  
2 x 12AU7  
Main Fuse  
1 x 5Amp slow blow 5 x 20mm for 100-120VAC or  
1 x 3Amp slow blow 5 x 20mm for 200-240VAC  
Plate Fuse  
1 x 1Amp slow blow 5 x 20 mm  
Initial Setup  
Carefully remove the ProLogue Five from its packaging. Use the white gloves to prevent  
fingerprint smudges.  
Remove the tube cage by carefully pulling it up and away from the amplifier.  
Remove the protective foam surrounding the tubes.  
Tubes are already installed. Check that each tube is firmly seated in its socket. Use gloves.  
Replace cage back in its place if desired.  
Check to see the power switch is off (down).  
Connect your speaker wires: positive to positive; negative to negative. This unit is non-inverting.  
Plug the power cord into the wallsocket and into your amplifier.  
Switch the preamplifier on and wait for 1 minute to stabilize the circuit.  
Switch the poweramplifier on.  
The tubes will be warmed up and ready to use in about 30 seconds.  
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PrimaLuna® ProLogue Five  
Inputs and Controls  
Front Panel  
The front panel of the PrimaLuna models is made from machined aluminium, finished to match the  
blue metallic chassis. No controls are available from the front. The power switch is located on the left  
side of the amp, just behind the front plate.  
Rear Panel  
Looking at the rear panel, you will note you have one set of inputs and the pair of speaker terminals.  
Attach the positive (+) from your loudspeaker to the 4 or 8 ohm terminal that most closely matches the  
average impedance of your loudspeakers according to their manufacturer's specifications. The  
negative (-) from your loudspeaker attaches to the 0 Ohm terminal.  
Experiment using the 4 or 8 Ohm positive (+) terminal to find the best match for your speakers. Do not  
make any assumptions. Trust your ears.  
Some preamplifiers invert the audio signal. In that case you might want to connect the positive(+)-wire  
of your loudspeaker cable to the 0 Ohm terminal of the ProLogue Five, and the negative (-)-wire to the  
4 or 8 Ohm terminal; do so on both channels. When in doubt, consult the preamp's manual or ask the  
manufacturer of the preamp. Our ProLogue Three preamplifier is non-inverting.  
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PrimaLuna® ProLogue Five  
Adaptive AutoBias™  
Exclusive to PrimaLuna, this circuit monitors and smoothly adjusts bias constantly and instantly. The  
genius of this design is that the Adaptive AutoBias™ actually improves the overall sound quality and  
performance of the amp. Between 12 and 30 Watts, measured distortion levels drop by over 40%. In  
addition, tubes do not have to be matched, and there is no bias (re-)adjustments needed, ever.  
Furthermore, the PrimaLuna is equipped with Soft-start™ , which brings the amplifier on line slowly to  
prolong the life of internal components, including the tubes. This makes the PrimaLuna a joy to own  
and operate.  
While matched tubes are not a requirement, it is still recommended if you want to get the very best  
results. You can get the very best in replacement tubes as well as rare vintage NOS (New Old Stock)  
tubes from us and other parties if you wish to upgrade. In the 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.  
7
 
PrimaLuna® ProLogue Five  
Tube Basics  
The 12AX7 and 12AU7 tubes will have a life of about 5,000 to 10,000 hours. The lives of powertubes  
are more difficult to predict. This also depends on how "gently" or "roughly" you use your amplifier. In  
general -under normal conditions- you can say between 2,000 and 3,000 hours.  
Here are some tips on using tubes:  
Do not use treatments on tube pins or in sockets.  
If you decide to experiment with other tube types, it's best not to swap tubes in and out repeatedly,  
as you never want to cycle amplifiers on and off rapidly. They should be left off for at least five  
minutes. Further, every time you insert a tube, you stand a chance of loosening the tube sockets.  
It's okay to have fun, and we support that, but don't go crazy and swap tubes in and out twenty  
times in a day.  
Do not leave the amplifier on 24 hours a day. Just a short warm-up is required for the PrimaLuna  
to get into its groove.  
Break-in yields improvements. Every tube, when new, needs to be left alone for a little while. So,  
when your amplifier is new, or when you re-tube it, it may take a little time to settle in. There is  
however no fixed "time rule" for break-in.  
Please note that tubes can vary electrically, and by plugging in the wrong type of tube (i.e. 6922  
for a 12AX7) you can damage the amplifier and void your warranty.  
Common replacements:  
12AX7: ECC83, ECC803S, E83CC, 7025, CV4004. You can also use a 5751, but please note that  
the 5751 is a lower gain tube than a 12AX7 and the sound will be altered.  
12AU7: ECC82, ECC802S, E82CC, 5814, 6189, CV4003  
KT-88: 6550, KT-90. You may also use EL-34, 6L6GC, 7581A and KT66 though power will drop  
slightly.  
Topview picture of ProLogue Five  
8
 
PrimaLuna® ProLogue Five  
Fuse Protection  
A note on fuses: If "someone who knows" tells you to wrap fuses with aluminium foil to avoid wasting  
money on new ones, it's best not to take his advice. Fuses are safety valves. They should always be  
replaced with the exact same value and type.  
Warning: Never attempt to check or replace a fuse while the amp is plugged in. Turn it off and unplug  
all speakers, components and AC cords before continuing. Wait 10 minutes to let tubes cool down and  
the circuit to fully discharge.  
Plate Fuse:  
The plate fuse is located inside the amp, on top of the Adaptive AutoBias™ board. To replace it,  
remove the bottom plate using a Phillips #2-type of screwdriver. The fuse is located in a small plastic  
case on the end of the Adaptive AutoBias™ board. Refer to the pictures on this page. Remove the top  
cover. The fuse will be held on by the cover. Remove it by twisting the fuse out of the holder. Replace  
with a 1Amp slow blow 5 x 20 mm fuse. The cover will snap back into place. Re-install bottom plate of  
the amp.  
Mains Fuse:  
The mains fuse is located on the rear of the amplifier, just below the power  
cord socket (see picture on this page). The fuse rating is 5Amp slow blow 5 x  
20mm for 100-120VAC and 3Amp slow blow 5 x 20mm for 200-240VAC .  
Replace with the same type and value fuse! The fuse holder can be snapped  
out using a small slotted flat blade screwdriver.  
9
 
PrimaLuna® ProLogue Five  
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.  
10  
 
PrimaLuna® ProLogue Five  
Warranty Information  
Two-year limited warranty  
Six-month warranty on stock vacuum tubes  
Terms & Conditions  
1. Limited to original purchaser. This warranty is for the sole benefit of the original purchaser of  
the covered product, and may not be transferred to a subsequent owner.  
2. Conditions & Limitations. This warranty is subject to conditions and limitations, as follows. This  
warrantly is void and inapplicable if the product has not been used in accordance with the  
instructions found elsewhere in this manual, or if it has been misused, abused, damaged by  
accident or neglect, or in transport once in possession of purchaser. The warranty is also void if  
the product has been tampered or has been repaired or modified by anyone other than Durob  
Audio BV or its specifically authorized representatives.  
3. Remedy. If this product contains material, manufacturing, or workmanship defects, it must be  
packed in orginal packaging and returned to Durob Audio BV or its authorized representative via  
insured freight, at the owner's expense. Returned products must be accompanied by written  
description of the defect, and a return authorization number (available from Durob Audio BV or the  
authorized representative via e-mail). Upon receipt of the defective product, Durob Audio BV or  
the authorized representative agrees to repair the product without charge for parts (except  
vacuum tubes if the unit is more than 6 months old), or labor. The product will then returned via  
prepaid, insured freight, with carrier at the sole determination of Durob Audio BV or the authorized  
representative. This constitutes the purchaser's sole remedy.  
4. Design change. Durob Audio BV and its partners reserve the right to modify their products or  
change specifications at any time without obligation or liability to previous purchasers.  
5. Miscellaneous. Any implied warranties relating to the above product shall be limited to duration of  
this warranty. This warranty does not extend to any indentical or consequential costs or damages  
to purchaser or third-parties. Our liability will be no more than the amount you paid for the product  
that is the subject of a claim. This is the maximum amount for which we are responsible. This  
warranty gives you specific legal rights. You may also have other rights which vary from country to  
country and state to state.  
11  
 
PrimaLuna® ProLogue Five  
Herman van den Dungen: PrimaLuna in Italian language is "First Moon". My grandfather was the  
first "Herman". My grandmother, an aristocratic lady in a small Dutch village, had a special name for  
her husband: "Maantje", which means Little Moon (which is now also the name of our small dog),  
van den Dungen. The people in the village adopted that name, and having a strong accent, they soon  
called him "Maontje" van den Dungen. My father's first name was Cor, but in the village it was of  
course "Cor from Maontje van den Dungen". I was of course "Herman from Cor from Maontje van  
den Dungen" …… etc. That's why I thought of First Moon as a brandname and that's why the logo is  
how it is ……ꢁ  
Loris Arrigucci: PrimaLuna believe it or not ... I discovered a small town located 50Km north of  
Milano called Primaluna!!! Please get yourself a map from Italy. You'll find Primaluna town near the  
upper-right corner. It is located 50Km north of Milano near the Lake of Como. This should eliminate  
every doubt regarding "italian" origin of Primaluna name. I've read the "history" section of the  
Primaluna village web site and found the following (literally translated):  
One probable interpretation of the name of the village comes from latin "Primum Lumen", which  
means "First Light" of Christianism, since the very first evidence of Christianism in this region dates  
495 Annus Domini. "First Light" translates into "Prima Luce" in Italian and this seems very interesting  
to me: PrimaLuce (FirstLight) is the first light that we, hi-fi lovers with small budgets, can see in this  
world of darkness populated by way too expensive esoteric gears ……ꢁ  
Please contact us for registering your PrimaLuna ProLogue Five amplifier. We will keep you updated of  
upgrades or any other information related to your amplifier. If you wish to comment on your PrimaLuna  
ProLogue Five amplifier, please do. If you want to send us a review of your experience with the  
amplifier, you are more than welcome to. If you have any technical questions, please don't hesitate to  
contact us. We thank you upfront for your time and attention.  
Local distribution:  
Worldwide distribution:  
Durob Audio BV  
P.O. Box 109  
5250 AC Vlijmen  
The Netherlands  
 

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