PrimaLuna EVO 400 Monoblock Power Amplifier (Pair)
Specifications
| Model EVO 400-4 for EL34 / KT88 / KT120 / KT150 | |
| Power Ultra-Linear: | 140 / 145 / 175 / 188 Watts Mono |
| Power Triode: | 82 / 88 / 94 / 109 Watts Mono |
| Frequency Response: | 9 Hz – 60 kHz +/- 1 dB8 Hz – 70 kHz +/- 3 dB |
| THD with AABB: | < 0.1% @ 1W; less than 2% at rated power |
| S/N Ratio: | 95 dB– 105 dB A Weighted |
| Input Impedance: | 100 kOhm |
| Input Sensitivity: | 1100 mV for rated power at maximum volume |
| Maximum Gain UL: | 27 dB / 26.5 dB / 26.5 dB / 26 dB; 30 dB / 30 dB / 30 dB / 30 dB |
| Maximum Gain TR: | 25.5 dB / 24 dB / 24 dB / 24 dB; 28 dB / 27 dB / 27 dB / 27 dB |
| Power Consumption: | 470 Watts / 480 Watts / 540 Watts / 550 Watts |
| Weight: | Net weight: 31 kg eachShipping Weight: 36 kg each |
| Dimensions: | 405 x 385 x 205 mm (L x W x H) |
| Shipping Dimensions: | 577 x 468 x 315 mm (L x W x H) |
| Inputs: | 1 pair Stereo RCA & XLR, 1 piece Mono RCA & XLR |
| Outputs: | 4, 8 & 16 / 2, 4 & 8 Ohm Speaker Taps |
| Tube Complement: | 8 x EL34, 6 x 12AU7 |
| Damping Coefficient: | 7 KD (1 kHz) |
Warranty
Shipping & Returns
We offer free shipping on any order over $150. For full details please see our Shipping Policy.
Our returns policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately, we may not be able to offer you a refund or exchange. For full details please see our Refund Policy.
PrimaLuna EVO 400 Monoblock Power Amplifier (Pair)
"Given a good source and loudspeakers, it’s the impressive centrepiece of a serious hi-fi system – one with a charm that many rivals conspicuously lack. A great affordable audiophile valve amp combination then, built to a high standard and with masses of upgrade potential"
Manufacturers Details:
REMOTE CONTROLLED TRIODE/ULTRA-LINEAR SWITCHING
Do you have some classic rock albums you used to love so much that have now ended up left on the shelf, un-played for years? How about jazz or classical recordings from the 60’s? Every audiophile has albums that they used to play, but stopped because they are harsh, brittle, or bright. There is a solution.
Triode and Single Ended Triode (SET) amps are popular for their warmer, fuller, and easy to settle into sound. But triode amps have limitations! Ultra-linear has more extension on the top and bottom, not to mention greater power. They have greater “pop” with a bigger difference between light and dark, and loud and soft. Having triode only is VERY limiting.
The best option is to have both triode and ultra-linear. PrimaLuna engineers in Holland designed an ingenious circuit that lets you change from triode to ultra-linear with a push of a button on the supplied remote control. No need to get up and stop the music. Make an instant comparison while you listen and choose what you like best for that song or album.
AC OFFSET KILLER - A PRIMALUNA EXCLUSIVE
AC Offset Killer 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.
BAD TUBE INDICATOR
PrimaLuna engineers wanted to make owning a tube amp so simple you would have no excuse not to have your tube dreams come true.
If a tube fails, Adaptive AutoBias will instantly put the amplifier into protection mode so no parts can get damaged. A red LED will light up in front of the tube that needs replacing. Simply plug in another tube, and listen. No guesswork. No smoking amp. No getting out the soldering iron or dropping your amp off at UPS.
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.
Engineered With Care:
STEREO OR MONOBLOCK OPERATION
It's as simple as flipping a switch, and PrimaLuna EVO Poweramps instantly switch from stereo to monoblock operation! Buy one, and as your budget grows your system can grow too. The benefit of monoblock operation is the amp now has dual output transformers for the best coupling with your speakers, and the addition of a 2-ohm speaker tap added to the 4 and 8-ohm taps. While all PrimaLuna amps are made for ribbons like Magnaplanars and electrostatics like Martin-Logan, you haven't heard anything until you have heard a PrimaLuna monoblock!
CUSTOM 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.
CUSTOM SUPER-WIDE-BANDWIDTH OUTPUT TRANSFORMERS
Output transformers are the most important part of any tube amp. They determine how low the bass will reach and how high the top end goes. 250 watts of power will have no top and bottom extension if the output transformers don't have the bandwidth. We use lower power to extend tube life, and bandwidth to give you slam. Transformers are the most expensive components in an amplifier, so manufacturers save money by using ‘off the shelf’ units available on the market. PrimaLuna output transformers are custom-designed, wound in-house, and massive. One reason why no other brand sounds like a PrimaLuna. "The flat tops and bottoms of these squarewaves correlate with the amplifier's extended low-frequency response; PrimaLuna's output transformers are of excellent quality." -John Atkinson, Stereophile Magazine
Key Features:
ADAPTIVE AUTOBIAS
What most companies call Auto Bias is actually "Cathode Bias"- A commonly used method that is cheap to make, and often found in guitar amps, but also $20,000 high end audio amps. It reduces the available power of the amp and runs the tubes hard, meaning shorter tube life and failures via "shorts".
PrimaLuna's Adaptive AutoBias is a true, smart technology employing an array of sensors to monitor tubes and make adjustments seamlessly in real time. More important, it is the ONLY circuit of its kind that is truly "adaptive" by addressing "tube pinch off" at higher volumes, therefore reducing distortion by over 50% and greatly extending tube life. Adaptive AutoBias is completely passive and NOT in the signal path. The result is low to no maintenance, long tube life, and the lowest possible distortion for amazing sound.
Adaptive AutoBias also provides unparalleled flexibility by allowing use of almost any tube on the market today. It even has a fine-tuning switch for EL-34 and KT88/KT120/KT150 tube types.
POINT TO POINT WIRING W/ SWISS MADE WIRE
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.
EVO 300 and EVO 400 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.
SMARTWATTS - EXTENDED TUBE LIFE
Tube life is simply a matter of how hard you run the tubes. That’s it. The only way to extend tube life is to run them as close to zero as you possible can, making sure it is not so low you go into crossover distortion. The life of a tube will depend on two things: Plate and screen voltage.
If the plate and screen voltage is high, you are more likely to get tube shorts when you turn the amp on and you get cathode stripping which greatly effects the cathodes ability to spit out electrons. Manufacturers that run the hell out of tubes to pump up their power ratings will never tell you what voltages they use. They’ll say it’s “proprietary” as if it’s some secret sauce. There is no such thing. But if they told you that they used 575, 600, or even 625 volts you probably wouldn’t buy. We proudly tell you our tubes run at just about 417 volts for the plates and screens.
PrimaLuna runs their output tubes at a minimum dissipation without going into crossover distortion. When you look at our amps, they provide less power from each tube. With KT-120’s as an example, a PrimaLuna will give you only 21 watts per tube. So running a pair of them you get 42 watts. That’s a lot of power, but the demands per tube are a fraction of some manufacturers that give you 100 watts from a pair of KT-120’s. It’s a cheap way to get big power, and it’s cheap. In fact, free. To get more power the right way is expensive. It requires bigger transformers, sockets, wiring, resistors, capacitors, and the tubes to do it. Which is exactly what PrimaLuna did. But we didn’t stop there.
Read this carefully: Power has nothing to do with sound quality. Or bass slam. You can buy a 200 watt receiver for $299, and it will even have surround sound. Do you think for a minute it will sound better than a 50 or 100 watts high end amp costing $10,000? Of course not. Only first-time buyers think that way. Experienced audiophiles know that for the majority of listening sessions, you use maybe 10 watts of power.
OUR AMPS ARE PERFECT. BUT YOUR SYSTEM MAY NOT BE
Ask any seasoned tube-head what the most musical output tube is and they will most certainly declare it the EL34. Other amp manufacturers would love to use it. Only PrimaLuna, through our proprietary output transformer designs, can give you EL34 midrange beauty with top-end air that goes on forever. And, bass extension with so much slam, our amps are used to power subwoofers.
However, every system is different. What if you bought a speaker with bass that overloads the room? Or, that is too dark? Or, too bright? What if you just want to have fun trying the different colors of sound from a vast pallet of tubes? With other manufacturers' products, you're stuck. They're a one-trick pony. How are you going to fine-tune your sound? Buy some different cables?!
With PrimaLuna, you get to choose. Go for it. 6L6G, 6L6GC, 7581A, EL34, EL37, 6550, KT66, KT77, KT88, KT90, KT120, even the monstrous KT150. A future-proof design, PrimaLuna is compatible with NEW tube types not even thought of today!
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NEED MORE GUIDANCE?
We are here to help
Check out some of our most commonly asked questions.
What do I need to play records?
Getting into vinyl? That’s awesome! We have some curated turntable Hi-Fi packs, with everything you'll need to get spinning right away. But if you want to build your own, read on for all the details.
First off, you'll need a turntable. It's the star of the show, so make sure it’s in good nick, with a decent cartridge and stylus (needle).
Next, there’s the phono preamp. Some turntables or amplifiers come with one built-in, but if yours doesn’t, you’ll need one as a bridge between your turntable and amplifier or powered speakers.
For the sound output, you’ve got two options. You can go with a traditional setup involving an integrated amplifier to take the signal from your phono preamp and power your passive speakers. Alternatively, you can opt for powered speakers, which have the amplifier built in – a handy all-in-one solution.
Speaking of speakers, good ones are a must for that rich, warm vinyl sound we all love. Whether you go for bookshelf or floorstanding speakers (or powered ones) depends on your space and budget.
And there you go! With these essentials, you’ll be ready to dive into your vinyl collection and enjoy that classic sound.
What can a wireless speaker do?
Wireless speakers are a game-changer for how you enjoy music and audio around the house. First off, they let you stream music wirelessly from your phone, tablet, or computer, so no more messing about with cables. You can easily play tunes from Spotify, Apple Music, Tidal or whatever streaming service you fancy.
If you’re into having music everywhere, many wireless speakers offer multi-room audio. You can sync them up to play the same music in every room or control what plays in each room individually, perfect for parties or just keeping the vibes consistent throughout your home.
Voice control is another brilliant feature. Many come with built-in assistants like Alexa, Google Assistant, or Siri. You can control your music with just your voice, ask for the weather, set reminders, or even control other smart home devices.
Sound quality? These little gadgets often pack a punch, delivering high-quality audio that can rival traditional wired setups. Some even offer 360-degree sound, filling the room with music from every angle.
In a nutshell, wireless speakers bring flexibility, convenience, and top-notch sound to your audio experience, making them a fantastic addition to any home. Whether you’re hosting a party, working from home, or just chilling out, they make listening to music a breeze.
How do you choose the right speaker & amplifier combination?
Deciding on a good speaker and amplifier combination is like putting together a perfect wine and cheese pairing—it’s all about balance and harmony. Here’s a conversational guide to help you through it:
First, consider your speakers. These are your main players, so you want to choose ones that fit your space and listening preferences. If you love deep bass and have a bit of room, floorstanding speakers might be your go-to. For smaller spaces or a more subtle look, bookshelf speakers are fantastic.
Now, onto the amplifier. This is where things get interesting. Your amp needs to match your speakers in terms of power and impedance. Check the wattage ratings on your speakers—your amplifier should provide enough power to drive them properly. Too little power and you’ll be missing out on sound quality; too much, and you risk damaging your speakers.
Next, think about the impedance (measured in ohms). Your amp and speakers should be compatible here too. Most speakers are rated at 8 ohms, but some can be 4 or 6. Make sure your amplifier can handle the impedance of your speakers to avoid any performance issues.
Another important factor is the type of sound you’re after. Some amps are known for their warm, rich tones, while others might be more neutral or even slightly bright. It’s a bit like choosing between a vinyl record and a digital stream or CD —each has its own charm. If possible, listen to different amp and speaker combinations to see what sounds best to your ears.
If purchasing online, note that at LE, we have made recommendations on speaker & amplifier combinations that we think sound wonderful together within each product listing.
Don’t forget about connectivity and features. Modern amplifiers often come with a host of options like Bluetooth, Wi-Fi streaming, and various inputs for all your devices. Make sure your amp has the inputs you need for your turntable, CD player, or streaming device.
Finally, consider your budget. Great sound doesn’t always mean breaking the bank, but be prepared to invest to get a quality setup that will last.
In the end, trust your ears. Listen to a few combinations if you can, and go with what makes your music sound the best to you.
Why do I need a headphone amplifier?
If you’re diving into the world of high-quality audio, a headphone amplifier can be a real game-changer. Think of it like this: most standard devices, like your smartphone or laptop, just don’t have the oomph needed to drive headphones properly. They might get the job done, but they won’t do your music justice. A headphone amp gives your headphones the power they need, ensuring you get the volume and clarity that really makes your music shine.
It’s not just about making things louder, either. A good headphone amp can significantly improve sound quality. You’ll get clearer highs, richer mids, and tighter bass, making your favourite tracks sound even better. You might notice details you’ve never heard before, especially if you’re listening to high-resolution audio files.
Premium headphones often have higher impedance, meaning they require more power than your typical audio source can provide. A headphone amp can handle this with ease, making sure your headphones perform at their absolute best. Plus, many amps come with extra features like bass boost, equalisation, and gain control, giving you more ways to tweak the sound to your liking.
In short, if you’re passionate about your music and want to hear it in the best possible way, a headphone amplifier is definitely worth considering. It’s all about unlocking the full potential of your gear and really getting the most out of your listening experience.
Where should I start when designing a home cinema?
Designing your own home cinema? That's awesome! We are here to help walk you through the process, but as a starting point, here’s what we would recommend and where to kick things off:
First up, pick your spot. For most people this is your existing lounge room, but if you have an underused garage, or spare bedroom, then you have an opportunity to create your very own true Home Cinema experience. Find a room that’s just right—not too cramped and ideally away from noisy areas. This sets the stage for that immersive movie experience.
Next, think about how you’ll set things up. Plan where your seats will go and where to place your projector screen for the best view from every angle. It’s all about creating that comfy, cinematic vibe.
Sound matters, too. Consider if you want a wireless system for simplicity or a full surround sound speaker system with AV receiver for that surround-sound thrill. Think about soundproofing or adding acoustic panels or thick carpets to really amp up the audio quality of the room.
Now, onto the screen. Decide between a crisp TV or a projector setup, depending on your room size and personal style. Maybe even throw in some dimmable lights or smart lighting to set the mood just right.
And hey, don’t forget comfort. Invest in plush cinema seating and think about the décor—whether it’s movie posters, blackout curtains, or popcorn machine & bar area, whatever gives you that true cinema feel.
Lastly, tech it up! Make sure everything—from your Blu-Ray player & Apple TV to your gaming consoles—is set to sync perfectly with your new setup.
With these steps, you’re on your way to creating a home cinema that’s not just a space, but an experience. Enjoy movie nights like never before!
