PROLOGUE PREMIUM

Preamplifier

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“I’ve listened to the PrimaLuna ProLogue Premium preamplifier at great length and carefully studied its construction.
In even a very expensive system, it will not set limits on musical enjoyment. As I concluded my review of PrimaLuna’s ProLogue Premium power amp: Class A sound at a Class C price.”

- Herb Reichert, Stereophile Magazine June 2017

 

ProLogue Premium Preamplifier - $2199

 

Is it true?  Can you buy one of the finest tube preamps ever made…one that magazine critics actually use themselves… for under $2200?

Yes. It's true.

We say this with calm assurance: The ProLogue Premium is built better and will sound better than $5000 offerings from any of the big name brands. If you don’t believe us, call PrimaLuna at 909-931-0219 and tell us what other product you are considering. We will tell you exactly HOW it is better.

How can we offer such a value? First of all, we don't overcharge our customers. Don’t buy into the hype. Have you noticed that most companies making preamps for $3000-$5000 will tell you it’s a "miniature version" or it’s "inspired by" their $10-20K flagship model? Look inside and the designs are nothing alike. Listen to us when we tell you this: In the last 10-15 years manufacturers have decided to double their profit margins by putting fewer, less expensive parts in the box. Just a little bit cheaper made every year, so you don't notice it. The product will still sound good because making a preamp is easy, but is NOT worth what they want to charge you. We’re calling them out on this. That 13-pound preamp they want to sell you for $4500 should cost no more than $1999.

There has not been a new design in tube preamps for decades. There have been improvements in some areas, but they are all built in the following ways: Preamps with one or two tubes are either hybrid (cheap to make) or use a lot of feedback. If they have four or more tubes, they use one of several designs, many of which have been around since the 1940's.   

The top-tier, most expensive preamps selling for $10,000 or more will have tube rectification so they are "pure tube." Many of these "flagship" preamps will also be dual-mono, so they don’t share parts between channels, yielding better separation. They will have point to point wiring instead of thin printed circuit boards to carry the signal (though even some flagship preamps still use circuit boards). Then, they will use a high-quality analogue potentiometer volume control instead of a $2.50 volume “chip”.

PrimaLuna uses TWO 5AR4 rectifier tubes, one for each channel in a true dual-mono circuit that is all point-to-point wired using the highest quality parts including the awesome Alps Blue Velvet volume control. All things included in this incredible preamp weighing in at an amazing 37.5 pounds

PrimaLuna buyers are typically well-seasoned tube-heads, and they know all this stuff. If you are new to tube preamps, you can help yourself by doing two simple things: Take the name and model of the product you are considering, and put it into Google. Then, get the weight and click on “Images” so you can see exactly what you are getting inside. Funny, we do that type of investigation in most everything we buy, but only in high-end audio do we get influenced by fairy dust.

We don’t offer fairy dust. We offer world-class European engineering, the finest name-brand parts, and workmanship that’s been declared over and over by experts to be untouchable.

 

Dare to Compare

Compare PrimaLuna construction to any other brand, at any price. You'll be amazed.

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Dual Toroidal power TRANSFORMERS

Power transformers generate two types of noise, magnetic and acoustic. That's why toroidal power transformers are used in the very best audio products. Compared to standard transformers, toroids radiate about 1/10 the magnetic field that pollutes music and obscures detail. Additionally, the absence of an air gap typically means toroids have an 8:1 reduction of acoustic noise. As transformers are the most expensive components in any audio product, manufacturers will even house cheaper C-core and EI-core transformers in an outboard power supply box with an umbilical cable rather than upgrade to an expensive toroid. The increased cost is significant, but PrimaLuna doesn’t cut corners. All PrimaLuna products use massive, potted toroidal transformers. PrimaLuna transformers are enclosed in a metal housing and then potted in a non-microphonic resin to further reduce noise and to protect the windings from moisture and deterioration forever. They are massive, resulting in a preamp weighing a substantial 37.5 pounds.

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TUBE RECTIFIED

In the world of preamps, experts agree that tube rectification is the gold standard. It offers the most natural, textured, and vibrant presentation because the circuit is now pure tube. But because it is expensive to implement, you’ll only find it in the top of the line models typically costing  $10,000 or more. Finding a preamp using one rectifier tube is sweet. PrimaLuna goes even further using two 5AR4 rectifier tubes in a dual-mono design for incomparable sound.

JAPANESE ALPS BLUE VELVET POTENTIOMETER

The best tube preamps use analogue volume controls. Not volume control chips. Look inside the most well-known brand of tube preamps and you will see a chip called a DS1666-10 Digital Resistor IC. At Primaluna, we understand the temptation to use this chip as they cost $4 each (half that in quantity!). The preamp will sound fine and be quiet, but true to “chips” it will add an electronic “sheen” to the sound. PrimaLuna prefers analogue. And we use the Gold Standard in motorized potentiometers:  The iconic Alps Blue Velvet. Why? Because they track perfectly, stay quiet, and don’t sound like chips!

SuperQuiet Line Inputs

Input selector switches leak noise and signals from other sources, as they never turn off the other inputs completely. And, they deteriorate with age, requiring the use of cleaners. Many are mounted on the front panel requiring long runs of wires to the back panel inputs. These wires pick up stray noise from RF and EMI.

PrimaLuna has a better way. Instead of a switch, input selection is done using premium quality sealed relays mounted in the rear where you plug in your components. When an input is selected, that relay closes giving you the best connection possible. All the other relays are left open, so noise and signals from other sources can’t leak in. The signal path is now almost non-existent, so there are no wires to pick up noise.

POINT TO POINT WIRING

You spend a lot of money on interconnects. So why have the signal go right from the RCA jacks or speaker terminals into circuit boards with copper traces so thin you can hardly see them? What’s high-end about that?

PrimaLuna employs Point to Point Wiring on all products. The entire signal path, including resistors and capacitors, is painstakingly hand wired with heavy-gauge cable by craftsman.

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DUAL-MONO DESIGN

Expensive and exotic preamps always use a dual-mono design to achieve a level of imaging not possible otherwise. Most manufacturers don’t employ dual-mono because of expense. It requires two power transformersdouble regulation circuits, and in fact….everything is double. In effect, dual-mono means building two discrete and separate preamps into one box. It is so expensive to build, it’s a rarity even at the highest price pointsAll PrimaLuna preamps are dual-mono for the ultimate in stereo imaging and a sense of space that goes on forever.  

NEW FRONT-END CIRCUITRY

We chose 12AU7 tubes because there are more factories around the world making great ones today than any other tube, so you can try them and see if you prefer their "color." In addition, because 12AU7's have always been a popular tube, there are tens of thousands of vintage new-old-stock 12AU7's available everywhere from the greatest factories like Telefunken, Mullard, Amperex, Cifte, Siemens, and more. Tons of them. If you haven't "Tube Rolled," it's a gas, and how you get that last 10% of PERFECT tonal balance to YOUR tastes. 

SmartGain Design

A preamplifier is typically not required to add any gain to your system when you are using it. It is usually lowering gain from the source you are listening to. The number one complaint from audiophiles about preamp performance is noise. So why is it that so many manufacturers design preamps with 20 to 27dB of gain? And you wonder why there is "hiss", and why tubes go noisy or microphonic? PrimaLuna preamps use SmartGain. With a gain specification of only 12dB, you will find your PrimaLuna preamp is as quiet as a church mouse. If tubes are less than perfect, you may never know it because they are not amplifying as "loud". High efficiency speaker owner's rejoice!

PerfectMatch

Another exclusive PrimaLuna feature is PerfectMatch, a circuit designed to present a perfect 100K ohm impedance to your source components. This is vitally important especially for tube source components, such as phonostages and DACs to sound their very best.

ProLogue Premium Features Comparison
 

DiaLogue Premium

ProLogue Premium

Price
?
Don't Overpay!
We want you to know our prices. PrimaLuna represents the best value in the industry. Compare us to anyone.
Swiss Made Wiring
?
Swiss Made Wiring
DiaLogue Premium models use Swiss-made, silver-plated, oxygen-free continuous crystal (OCC) copper with a Teflon dielectric in the critical signal path for superior signal speed and increased clarity.
 
Takman Resistors
?
Takman Resistors
If you bought a lesser amplifier, you would pay hundreds to make this upgrade. Easy to identify through their pink color, these premium resistors from Japan are popular with those who rebuild and upgrade their gear. "Modders" love TAKMAN for their low noise, linearity, and musicality.
 
Mundorf Capacitors
?
Mundorf Capacitors
Made in Germany, Mundorf MCap EVO SilverGold capacitors are used in the critical signal paths and while they are expensive, the PrimaLuna team felt they could not be left out after careful listening comparisons with many different types.
 
AC Offset Killer
?
AC Offset Killer - A PrimaLuna Exclusive
DiaLogue Premium is about goose bumps. The ones you get when music comes out of a background so quiet, you may say to yourself “Just how is this possible?”

PrimaLuna custom-winds our own massive toroidal power transformers that are low in hum and EMI. But we wanted more. Our engineers designed the AC Offset Killer to lower transformer noise to a place no other manufacturer dreams of going, regardless of how bad your electricity is. The result? Sense of space. Texture. The resonance of an acoustic guitar or violin string that seems to trail on forever. The AC Offset Killer will amaze you.
 
SuperQuiet Inputs
?
SuperQuiet Inputs
Input selector switches mounted on the front panel requires long wires to run from the switch in the front to the rear RCA jacks, and they invite stray noise like RF and EMI. Additionally, audio quality degrades as the switch gets dirty and worn and they present crosstalk between the inputs. This crosstalk causes noise which obscures micro details in the music.
PrimaLuna has a better way. Instead of a switch, input selection is done using premium quality sealed relays mounted in the rear where you plug in your components. When an input is selected, that relay closes giving you the best connection possible. All the other relays are left open, so noise and signals from other sources can’t leak in. The signal path legnth is almost non-existent, so there are no long wires to pick up noise.
Dual Mono Topology
Vacuum Tube Rectified
?
Vacuum Tube Rectified - Dual Mono Design
In the world of preamps, experts agree that tube rectification offers the most natural, textured, vibrant presentation. That's why you find it in the best, top of the line models. Finding a preamp using one rectifier tube is sweet. But PrimaLuna uses two 5AR4 rectifier tubes in their dual-mono design. All PrimaLuna preamps are actually two preamps in one chassis. The result is obvious. Better imaging...like no other. That's where the weight comes from. And weight costs money because it means more and (in our case) better parts.
Point-to-Point Wiring
?
Point to Point Wiring
You spend a lot of money on interconnects. So why have the signal go right from the RCA jacks or speaker terminals into circuit boards with copper traces so thin you can hardly see them? What’s high-end about that?
PrimaLuna employs Point to Point Wiring on all products. The entire signal path, including resistors and capacitors, is painstakingly hand wired with heavy-gauge cable by craftsman.
Remote Control
?
Remote Control
DiaLogue Premium models feature a full function remote control. ProLogue Premium features a slim remote.
Dual Toroidal Power Transformers
?
Custom Potted Toroidal Power Transformers
Unlike standard EI transformers, toroidal transformers don’t radiate a magnetic field, which can is easily detected in preamp circuits as low-level "hash". Although expensive to manufacture, PrimaLuna power transformers are built huge and rated for 200% of their duty cycle. PrimaLuna transformers are also potted and enclosed to protect the windings from moisture and deterioration forever.
ALPS Blue Velvet Potentiometer
?
Japanese ALPS Blue Velvet Potentiometer
The ALPS Blue Velvet motorized volume control tracks better so a defined stereo image is established and doesn't collapse as you raise and lower volume. And it will stay quiet, adhering to PrimaLuna's guiding principle of "Built to last a lifetime". This part alone costs ten times more than a simple "chip" that we could have used.
Power Transformer Protection
Home Theater Pass-Through
Swiss Made Wiring
DiaLogue Premium models use Swiss-made, silver-plated, oxygen-free continuous crystal (OCC) copper with a Teflon dielectric in the critical signal path for superior signal speed and increased clarity.
Takman Resistors
If you bought a lesser amplifier, you would pay hundreds to make this upgrade. Easy to identify through their pink color, these premium resistors from Japan are popular with those who rebuild and upgrade their gear. "Modders" love TAKMAN for their low noise, linearity, and musicality.
Mundorf Capacitors
Made in Germany, Mundorf MCap EVO SilverGold capacitors are used in the critical signal paths and while they are expensive, the PrimaLuna team felt they could not be left out after careful listening comparisons with many different types.
AC Offset Killer - A PrimaLuna Exclusive
DiaLogue Premium is about goose bumps. The ones you get when music comes out of a background so quiet, you may say to yourself “Just how is this possible?”

PrimaLuna custom-winds our own massive toroidal power transformers that are low in hum and EMI. But we wanted more. Our engineers designed the AC Offset Killer to lower transformer noise to a place no other manufacturer dreams of going, regardless of how bad your electricity is. The result? Sense of space. Texture. The resonance of an acoustic guitar or violin string that seems to trail on forever. The AC Offset Killer will amaze you.
SuperQuiet Inputs
Input selector switches mounted on the front panel requires long wires to run from the switch in the front to the rear RCA jacks, and they invite stray noise like RF and EMI. Additionally, audio quality degrades as the switch gets dirty and worn and they present crosstalk between the inputs. This crosstalk causes noise which obscures micro details in the music.
PrimaLuna has a better way. Instead of a switch, input selection is done using premium quality sealed relays made by Fujitsu in Japan, mounted in the rear where you plug in your components. When an input is selected, that relay closes giving you the best connection possible. All the other relays are left open, so noise and signals from other sources can’t leak in. Relays open and close, so there is no selector switch wiper to get dirty, noisy, or wear out. The signal path is now much shorter. In fact it’s almost non-existent, so there are no long wires to pick up noise.
Point to Point Wiring
You spend a lot of money on interconnects. So why have the signal go right from the RCA jacks or speaker terminals into circuit boards with copper traces so thin you can hardly see them? What’s high-end about that?
PrimaLuna employs Point to Point Wiring on all products. The entire signal path, including resistors and capacitors, is painstakingly hand wired with heavy-gauge cable by craftsman.
Japanese ALPS Blue Velvet Potentiometer
The ALPS Blue Velvet motorized volume control tracks better so a defined stereo image is established and doesn't collapse as you raise and lower volume. And it will stay quiet, adhering to PrimaLuna's guiding principle of "Built to last a lifetime". This part alone costs ten times more than a simple "chip" that we could have used.
Custom Potted Toroidal Power Transformers
Unlike standard EI transformers, toroidal transformers don’t radiate a magnetic field, which can is easily detected in preamp circuits as low-level "hash". Although expensive to manufacture, PrimaLuna power transformers are built huge and rated for 200% of their duty cycle. PrimaLuna transformers are also potted and enclosed to protect the windings from moisture and deterioration forever.
Vacuum Tube Rectified - Dual Mono Design
In the world of preamps, experts agree that tube rectification offers the most natural, textured, vibrant presentation. That's why you find it in the best, top of the line models. Finding a preamp using one rectifier tube is sweet. But PrimaLuna uses two 5AR4 rectifier tubes in their dual-mono design. All PrimaLuna preamps are actually two preamps in one chassis. The result is obvious. Better imaging...like no other. That's where the weight comes from. And weight costs money because it means more and (in our case) better parts.
Remote Control
DiaLogue Premium models feature a full function remote control. ProLogue Premium features a slim remote.
primalunabg.jpg

ProLogue Premium Preamplifier Specifications

Price
Inputs
Outputs
Gain
Freq. Response (+/- 3dB)
THD
S/N Ratio
Input Sensitivity
Input Impedance
Output Impedance
Power Consumption
Standard Tube Compliment
Dimensions (WxHxD)
Weight