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PrimaLuna - DiaLogue HP


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Introducing the DiaLogue Premium HP Integrated Amplifer from PrimaLuna!
(HP means High-Power) 

This is an iconic product that is built to last a lifetime and you can see it in action at Len Wallis Audio. The key take away from this product page is to understand that, like all PrimaLuna products, the HP will be both relevant and desired decades later.

The PrimaLuna DiaLogue Premium integrated amplifier has been hailed by experts as the best you can buy.  

Sam Tellig loved it in his review for Stereophile magazine, giving it a Stereophile Class A Recommended Component rating.

Dick Olsher, a world expert on vacuum tube audio stated in his review for The Absolute Sound magazine said “It’s my current benchmark in integrated tube amplifiers.”

Merriam-Webster dictionary defines benchmark as, “Something that serves as a standard by which others may be measured or judged.”

Because PrimaLuna designs and proprietary output transformers, the 36 watt DiaLogue Premium has arguably better bass slam than 75 watt tube amps from the biggest names out there.
For customers with low efficiency speakers (84-86dB) that like to play their music loud and have a large room, they may want even more power.

PrimaLuna could have easily doubled the output power by simply doing what everybody else does: Run the tubes harder. We;'ve seen this all before. Two power tubes per channel running at the jagged edge, producing 75 or even 100 watts. Yes it's a great headline number. Yes it's making big sound. But it's also going to produce unhappy customers, who have to replace tubes every 12 months whereas PrimaLuna customers may go ten years before re-tubing.

A better, though much more expensive way to build, is to keep running the tubes easy, but add four more EL34s. That required enlarging the toroidal power transformer, adding a second Adaptive AutoBias board, and all the circuitry upgrades including the tubes, sockets, Swiss wiring, and Takman resistors.

This is the PrimaLuna approach and the result is the HP.

This is one of the most powerful tube integrated amps in the world. Delivering 70 watts per channel from EL34's, 80 watts from KT88's, 84 watts from KT120's, and 96 watts from KT150's. And like all PrimaLuna amps, the tubes are run so easy you can use it every day and just relax.

In addition the PrimaLuna HP is also an accomplished headphone amplifier. In fact some say this is one of the best headphone amps in the world. Come and experience this for yourself at Len wallis Audio's showroom at 64 Burns Bay Road, Lane Cove and you'll find that it's going to be hard to argue with this statement. 

Most tube integrated amps and preamps use a solid state op-amp chip for running headphones. Stand alone tube headphone amps will vary in quality like any other tube amp. Headphones are simply small speakers that require less power. Some will use smaller output tubes that groan to have enough dissipation to run power-hungry planar headphones. Other brands, including those costing $10,000 or more will use larger output tubes, then use a voltage divider network to drop the power down to an acceptable level for headphones.

This is how PrimaLuna designed the HP. They took advantage of the fact that this is the best tube integrated amplifier. Now you don't have to pay for a separate state of the art headphone amp. But unlike the other brands, the HP can run your headphones in Triode or Ultra-linear operation at the push of a button!

The key features of PrimaLuna HP Integrated Amplifier 

> Point to point wired with Swiss made cable. It's obvious that point to point wiring sounds better and lasts longer than wave-soldered thin printed circuit boards. It's what sets PrimaLuna apart and is part of our credo. In the new DiaLogue Premium we went a step further by using 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 preamp, you would pay hudreds to make this upgrade. Easy to identify through there pink color, these premium resistors made in Japan are popular with those who rebuild and upgrade there gear. 'Modders' love TAKMAN for their low noise, linearity, and musicality.

> SCR Tinfoil Caps. Made in France, these capacitors are used in the critical signal paths and while they are expensive, the PrimaLuna team they could not be left out after careful listening comparisons with many different types.

> AC Offset Killer. A PrimaLuna exclusive. This is another PrimaLuna 'magic bullet' design to 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'. It's job is to keep 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.

> New front-end circuitry. The DiaLogue Premium uses three 12AU7 tubes per channel. The result is even lower distortion and increased bandwidth. The change in dynamic range is stunning! Distortion levels in the first stage have dropped by a factor of five at low levels, and at least 20 at higher levels, above one volt. The four 12AU7’s on the outside are driver tubes. By using four instead of two, we can swing more voltage. The two tubes in the center are the input tubes, and that’s where you want to have fun later if you wish by experimenting with different tube brands.

> 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.' By contrast, a tube like the 6H30 tube is well-known for thin mids, and they are only made in one factory in Russia. If your equipment uses that tube, there is no way to fine-tune the tonal balance of your system trying different brands; you'd better like it as-is. What if that 6H30 factory has a problem, closes, or just decides to stop making them? 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.

> Remote controlled Triode/Ultra-linear Switching – Did you use to love listening to classic rock like the Stones, Neil Young, Hendrix, or The Doors, and some of it now ends up left on the shelf? How about jazz or classical recordings from the 60’s? Every audiophile has songs or albums that they used to love to listen to, but they stopped. Not because the music was bad; it was the best! The problem is, some older recordings sound harsh, brittle, or bright. It’s a shame that we buy a system that is designed to make music listening more enjoyable, and then the higher resolution stops us from playing the albums we love most. 

> Dedicated subwoofer output. If you're favorite sub only uses line-level inputs, such as the JL Audio subwoofers, the DiaLogue Premium Integrated makes it simple to use!

The DiaLogue Premium Series also includes the same innovative circuits found in the
ProLogue Premium series, that protect the amp and improve sound at every level:

> Primaluna's exclusive Adaptive AutoBias. Bias is very important, and before you buy anything you need the click that link (it's in red) to learn the basics. If anybody tells you that they have auto bias, ask them precisely how. It's 99% likely to be untrue. As with all PrimaLuna amps, you never have to worry about biasing your amp ever again, and the need for matched tubes is eliminated. You can run EL34, KT88, KT120, even KT150 tubes, as well as many others. AAB does the rest while improving sound quality. Tubes are constantly monitored and kept in their best operating range, reducing distortion by up to 50%!

> BTI-circuit. BTI stands for 'Bad Tube Indicator.' On the chassis’ deck in front of each power tube, is a small LED that lights up if the tube goes bad. The circuit then puts the amp into protection mode. With other brands, this may be when you have to break out the soldering iron to replace a plate resistor, and replace two or four tubes because your amp requires matched sets. With PrimaLuna, you just replace the tube it tells you to (no matched tubes required), and turn the amp back on. No hassles, no headaches.

> KT150 Compatible and designed for the future – In 2006 PrimaLuna introduced the original DiaLogue series; the first amplifiers designed to be as close to being future proof as humanly possible. Back then nobody imagined a tube like the KT120, let alone the KT150, which combines the sweetness of a 300B with bass and control never seen before. Now other companies are scrambling to make a product built to handle the demands of this incredible tube.

> All PrimaLuna DiaLogue Premium and ProLogue Premium amplifiers and integrated amplifiers are built with huge power transformers and filaments supplies needed to run KT150 tubes. And the ingenious design of our exclusive Adaptive AutoBias circuit means that PrimaLuna buyers from ten years ago don’t have to sell off their system to enjoy new tube developments.

> SmartWatts design with a tube life of up to ten years. When you buy any tube product, you need to think about the operational costs to own it. Many brands quote changing power tubes after 2000 hours. Not PrimaLuna. If an amp runs the tubes hard, its sound quality can start to degrade in 9 months and need to be re-tubed in a year. What’s fun about that? Understanding tube life is easy when you understand this.

> SuperQuiet Line Inputs.
Selector switches mounted on the front panel have two problems: First, there are often long wires that run from the switch in the front to the rear RCA jacks, and they invite stray noise like RF and EMI. Second, switches don’t make the best contact when new, and the quality degrades as the switch gets dirty and worn. Then, selector switches have crosstalk between the inputs. You’ve probably heard it yourself; you’re listening to a CD and the music ends, and you can hear a faint signal from your tuner. Or a slight hiss, hum, or buzz coming in to through inputs you aren’t using. The noise can be obvious, or so small that you can’t really identify it. The negative effect is the same: It obscures micro details in the music that allow you to make out things like the body of a guitar or the sense of space in a hall.

> 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 wiper to get dirty, noisy, or wear out. The signal path is much shorter. In fact it’s almost non-existent, so there are no long wires to pick up noise.
One last technical feature: 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.

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 wide bandwidth output transformers
No other brand can copy the PrimaLuna sound for one simple reason: PrimaLuna output transformers. Almost every manufacturer buys their output transformers off the shelf; with varying degrees of success. Transformers are the most important (and most expensive) ingredient in making an amplifier. Our output transformers are custom wound in-house. The designs are the result of collaboration between engineers in the Netherlands and the United States, and built to the same standards that you come to expect from the world’s authority on tube amplifier manufacturing.

That’s why PrimaLuna bass extension is deep and tight, the top end extended but without even a hint of grain, and that famous PrimaLuna midrange, which creates a sense of space and shape you won’t get anywhere else.|

PTP-circuit. If the power transformer should overheat, this 'Power Transformer Protection' circuit cuts primary power, allows the amp to cool down, then resets itself.

OTP-circuit. The 'Output Transformer Protection' circuit protects the output transformers in the event of a user error crossing speaker wires.

As with all PrimaLuna components, the DiaLogue Premium Integrated is made by hand with the finest point-to-point wiring and quality equal to—or better than—any product you can buy at any price. All packaged in a high-gloss, hand-rubbed finish.

Dialogue Premium HP Integrated Specifications 

Output Ultra-linear
(8 Ohms, 1% THD): 96 watts x 2 (KT150)
89 watts x 2 (KT120)
73 watts x 2 (KT88)
70 watts x 2 (EL34)

Output Triode

(8 Ohms, 1% THD): 54 watts x 2 (KT150)
51 watts x 2 (KT120)
42 watts x 2 (KT88)
40 watts x 2 (EL34)

Headphone Output: 11.4 watts (32 O, 1% THD)
6.56 watts (64 O, 0.70% THD)
3.05 watts (150 O, 0.60% THD)
1.58 watts (300 O, 0.60% THD)
0.82 watts (600 O, 0.60% THD)

Freq. Response (+/- 1dB):
7Hz-75kHz (KT120 & KT150)
7Hz-70kHz (KT88)
7Hz-65kHz (EL34)
THD (1W/1kHz):
< 0.1%

S/N Ratio: 93 dB (KT120 & KT150)
92 dB (KT88 & EL34)

Input Sensitivity: 360mV (KT120 & KT150)
320mV (KT88 & EL34)

Input Impedance: 100k Ohm
Power Consumption: 255 watts
Dimensions: 385mm x 205mm x 405mm (WxHxD)
Weight: 30 kgs 
Inputs: 5 pair RCA / 1 pair HT bypass
Outputs: 4 & 8 Ohm output taps
RCA Subwoofer output
1/4' Headphone output
Standard Tube Compliment: 6 - 12AU7, 8 - EL34


Contact Len Wallis Audio

Address: 64 Burns Bay Road,
Lane Cove NSW 2066,
Telephone: (02) 9427 6755