PROLOGUE PREMIUM

Preamplifier

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If you want the award-winning, giant-killing, heart-pumping, music-making DiaLogue Premium Preamplifier, but can’t afford $3199, there’s no reason to feel sad.

ProLogue Premium Preamplifier - $2199

 

Yes, the DiaLogue Premium gets all the reviews, but only because we can send a magazine only one model to review, so we send the most expensive one. This is what you need to know: The ProLogue Premium preamp is almost an exact DNA match with its big brother. It would take a real expert to tell them apart; either from reading the schematics and build sheet or from the incredible performance.

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 do that? 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, 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.

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Dual Toroidal power TRANSFORMERS

Why? For the lowest noise. The #1 reason for having an outboard power supply on a preamp is to isolate sensitive small signals from EMI and hum radiated from the typical EI transformers used by many companies. The best cure for this problem is to use toroidal transformers, as they don't radiate EMI outside the core. Transformers are the single most expensive part in audio equipment, and that usually means cutting corners. Toroidal transformers cost much much more than typical EI core, because they take a long time to wind. Instead of a machine making many at the same time, the best quality ones like we use at PrimaLuna are made one at a time in-house. They are massive, resulting in a preamp weighing a substantial 37.5 pounds.

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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.

Look at the interior photos and you will see that 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.

SuperQuiet Line 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.

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.

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. 

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.

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! 

 

RCA INPUT IMPEDANCE

Each input has a circuit designed to present a perfect 100K ohm input impedance to the components you are plugging in, assuring you that every piece of gear you listen to will sound its 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
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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
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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.
 
SCR Tinfoil Capacitors
?
SCR Tinfoil Capacitors
Made in France, these 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
This PrimaLuna technology helps make our products so quiet, you will get goose-bumps. PrimaLuna's parent company Durob Audio B.V. sells this as a stand alone item under the Ah! brand name. The fabulous company P.S. Audio sold something similar as a "Humbuster". AC Offset Killer keeps the main AC power transformer as quiet as possible. PrimaLuna custom-winds superb AC toroidal transformers that are low in hum. This circuit takes it a to a place no other manufacturer dreams of going. Adding this to your stereo would cost hundreds.
 
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.
SCR Tinfoil Capacitors
Made in France, these 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
This PrimaLuna technology helps make our products so quiet, you will get goose-bumps. PrimaLuna's parent company Durob Audio B.V. sells this as a stand alone item under the Ah! brand name. The fabulous company P.S. Audio sold something similar as a "Humbuster". AC Offset Killer keeps the main AC power transformer as quiet as possible. PrimaLuna custom-winds superb AC toroidal transformers that are low in hum. This circuit takes it a to a place no other manufacturer dreams of going. Adding this to your stereo would cost hundreds.
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

Dare to Compare

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