heed audio thesis lambda review

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Heed Audio - Thesis Lambda - Preamplifier

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T he Thesis λ (lambda) is a preamplifier for analogue-blooded fans. You can choose between five of your analogue sources and adjust the volume with a remote control, but that is all you can get from the digital world by this clean-cut preamp. On the analogue side, however, it is the most refined preamplifier ever built by Heed.

The amplifier circuit of the Thesis λ is the pure version of the Thesis α’s (Alpha) analogue section. With the lack of digital circuitry, there is no reason to compromise anything. Aiming for the best possible sound quality, the Thesis λ offers an exceptional PCB design, unique to our Thesis line preamplifiers.

In a standalone mode, it is a very robust and capable device with its sturdy internal power supply. There is, however, an option to upgrade this remarkable performance to an even more astonishing level. The Thesis π (Pi) external power supply adds even more clarity, more accuracy and a wonderful smoothness to the presentation of music.

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Collections: Heed Audio , HiFi , Preamplifiers

Type: Preamplifier

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Immerse yourself in the enchanting world of music with the Heed Audio - Thesis Lambda - Preamplifier. This isn't just a device; it's an experience, a bridge to musical memories and new adventures. With its sleek design and unparalleled sound quality, it transcends being a mere piece of equipment. It's a statement, a lifestyle, a celebration of sound. Why hold back? Embrace the rhythm, live the melody!

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T he Thesis λ (lambda) is a preamplifier for the analogue-blooded fans. You can choose between five of your analogue sources and adjust the volume with an RC handset, but that is all you can get from the digital world by this clean-cut preamp. On the analogue side, however, it is the most refined preamplifier ever built by Heed.

The amplifier circuit of the Thesis λ is the pure version of the Thesis α’s analogue section. With the lack of digital circuitry, there is no reason to compromise anything. Aiming for the best possible sound quality, the Thesis λ offers an unexceptional PCB design, unique to our Thesis line preamplifiers.

In a standalone mode, it is a very robust and capable device with its sturdy internal power supply. There is, however, an option to upgrade this remarkable performance to an even more astonishing level. The Thesis π external power supply adds more clarity, more accuracy and a great bunch of smoothness to the presentation.

If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible.

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Do you offer international shipping? Currently, we only ship within Australia. We are working on expanding our shipping options to include international destinations in the future. What is your return policy? We offer a 30-day return policy on most items. Products must be in their original condition and packaging to be eligible for a return. Please refer to our Return Policy page for more details. How do I initiate a return? To initiate a return, please contact our customer service team with your order number and reason for return. We will provide you with instructions on how to proceed. Can I exchange an item? Yes, we offer exchanges for items of equal or greater value. Please contact our customer service team to arrange an exchange. Are your products covered by a warranty? Yes, all our products come with a manufacturer’s warranty. The duration and terms of the warranty vary by product. Please refer to the product page for specific warranty information. How can I get help with setting up my new equipment? Our knowledgeable support team is here to help! You can find setup guides and troubleshooting tips on ou Do you offer any discounts or promotions? Yes, we regularly offer discounts and promotions on various products. Sign up for our newsletter to stay updated on the latest deals and exclusive offers. **Q: Can I use multiple discount codes on a single order?** A: Only one discount code can be applied per order. Discount codes cannot be combined with other offers. --- If you have any additional questions not covered here, please feel free to contact us. We are always happy to assist!

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Nirvana Audio

THESIS LAMBDA

The Thesis λ (lambda) is a preamplifier for the analogue-blooded fans. You can choose between five of your analogue sources and adjust the volume with an RC handset, but that is all you can get from the digital world by this clean-cut preamp. On the analogue side, however, it is the most refined preamplifier ever built by Heed.

The amplifier circuit of the Thesis λ is the pure version of the Thesis α’s analogue section. With the lack of digital circuitry, there is no reason to compromise anything. Aiming for the best possible sound quality, the Thesis λ offers an unexceptional PCB design, unique to our Thesis line preamplifiers.

In a standalone mode, it is a very robust and capable device with its sturdy internal power supply. There is, however, an option to upgrade this remarkable performance to an even more astonishing level. The Thesis π external power supply adds more clarity, more accuracy and a great bunch of smoothness to the presentation.

Specifications

5x analogue

Max. consumption

Fully remote controllable

1x Tape out

Upgradeable power supply

THESIS PI (Optional)

Weight & Dimensions

Weight：9 kg

Dimensions：22 x 8.5 x 36 cm

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Heed Thesis Lambda

The Thesis λ Lambda is a preamplifier for the analogue-blooded fans. You can choose between five of your analogue sources and adjust the volume with an RC handset, but that is all you can get from the digital world by this clean-cut preamp. On the analogue side, however, it is the most refined preamplifier ever built by Heed.

The amplifier circuit of the Thesis λ is the pure version of the Thesis α’s analogue section. With the lack of digital circuitry, there is no reason to compromise anything. Aiming for the best possible sound quality, the Thesis λ offers an unexceptional PCB design, unique to our Thesis line preamplifiers.

In a standalone mode, it is a very robust and capable device with its sturdy internal power supply. There is, however, an option to upgrade this remarkable performance to an even more astonishing level. The Thesis π external power supply adds more clarity, more accuracy and a great bunch of smoothness to the presentation.

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Heed Thesis Lambda Preamplifier

$ 3,825.00

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T he Thesis λ (lambda) is a preamplifier for the analogue-blooded fans. You can choose between five of your analogue sources and adjust the volume with an RC handset, but that is all you can get from the digital world by this clean-cut preamp. On the analogue side, however, it is the most refined preamplifier ever built by Heed.

The amplifier circuit of the Thesis λ is the pure version of the Thesis α’s analogue section. With the lack of digital circuitry, there is no reason to compromise anything. Aiming for the best possible sound quality, the Thesis λ offers an unexceptional PCB design, unique to our Thesis line preamplifiers.

In a standalone mode, it is a very robust and capable device with its sturdy internal power supply. There is, however, an option to upgrade this remarkable performance to an even more astonishing level. The Thesis π external power supply adds more clarity, more accuracy and a great bunch of smoothness to the presentation.

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Features & Specifications

– 5 analogue inputs

– upgradeable analogue power supply (see Thesis Pi)

– fully remote controllable

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The Article

Heed’s thesis phono amplifier with supportive power supply…still, it’s all greek to me.

14th September 2016

Small in stature and promising superior sonics, Paul Rigby reviews the Heed Thesis φ (phi) phono amplifier and the supportive Thesis π (pi) power supply

You know, sometimes hi-fi companies can be a bit too clever for their own good. Yes, I know that manufacturers want to stand out and I encourage that. I also applaud those brands that infuse their products with imagination and add a twist to that branding but when you start naming your products after a Greek alphabet which then means that you then have to add, at some point, an explanation to that symbol in brackets afterwards, I wonder if the impact is lost a little? You also risk problems.

I could see two related issues, in terms of marketing and image, when Heed decided to send me a Thesis π (pi) power supply that feeds directly into the company’s own Thesis φ (phi) phono stage. And this before we even get to the sound quality or even the aesthetics.

The first issue is the reader’s thought process as the eye moves left to right across both of those names and their attendant bracket explanations and it goes something like this, “Thesis…ok, got that. What the hell’s that little squiggle? Oh, I see. Hmmm.” The name suffers from a major loss of impact and, hence, becomes a bit of a damp squib. If they had called the boxes the ‘Thesis Kevin’ and the ‘Thesis Fluffy Bunny Rabbit’, for example, then at least you would know where you were (plus every animal lover called Kevin would immediately be on your side).

Next? No-one likes to think of themselves as dumb or a fool and everyone hates to be patronised. So, either Heed lose half of their potential customers by only putting the symbol on its own and making those confused people scratch their heads in confusion (“Who do they think I am? A graduate of Classics from Durham University?”) or Heed add that explanation in brackets and risk patronising those knowledgable users who knew full well that φ is ‘phi’ (“You don’t have to tell me sunshine, I know perfectly well what ‘phi’ is, thank you very much.”)

Whatever your thoughts are in terms of branding, both products remain in a black chassis with an aluminium fascia occupying a small footprint of 9.5 x 7.5 x 22cm (phono stage) and 22 x 8.5 x 32.5cm (power supply).

The Thesis φ (phi) uses two independent – MM (moving magnet) and MC (moving coil) – amplifier circuits, so it is possible to use two record players connected simultaneously. Cartridge matching is customisable for gain and impedance on the rear panel of the unit by jumpers. They are not as fiddly as you might think and I prefer them to the oft produced DIP switch arrangement which can be confusing. For the record, the phono amplifier includes Moving Magnet outputs of 50 and 600 Ohms and Moving Coil outputs of 50 and 600 Ohms with MC gain levels of 44, 50, 56, 62, 68 and 74dB and MM gains of 33 and 48dB plus input impedance (MC) of 100, 220, 470 and 1000 Ohms plus input impedance (MM) of 47k and 150 pF.

As for the power supply? This is a flexible friend in terms of Heed kit, as it can feed the α or λ preamplifiers and the φ phono stage simultaneously. It has two independent sections, each with dual regulated power supply rails and uses “high-grade” components custom made to Heed’s specifications.

The only issue I have with the phono amp during use is the front mounted power light. There really isn’t one and, for a few moments, I wondered if the unit was broken when I first installed it. Then I realised that the dark grey brand name on the front of the unit ‘lit up’ to…light grey. It’s not the best power indicator. Subtle and great for evening viewing (who wants a bright blue power light bonding them at such times?) but I feel another solution is needed here.

SOUND TESTS

I began with a slice of slow jazz. Dakota Staton and ‘Round Midnight. This track features a quite complex orchestral backing with plenty of elements but the master itself is another challenge as it’s a tad ‘hot’. That is, the compression dares to edge into the red at times. It’s not an overly bright master, don’t get me wrong and the effect is quite subtle but Staton’s vocal can be ever so slightly strident at high volumes and during crescendos. Any quality phono amp has to address potential issues such as this: the idea is to widen the dynamics to make the sound more acceptable to the ear and to not make things worse.

I shouldn’t have worried because the sense of clarity and transparency that exuded from the Heed during the first few seconds reassured me that this was going to be a very enjoyable test indeed.

That clarity aided the lead vocal. For example, mid-song, Staton sings “Suppertime, I’m feeling sad.” This song suffers from sibilance problems (not a hi-fi issue but a mastering problem). A sub-standard phono amp would emphasis these rogue ’S’ emphasis issues to trigger pain in the ears whereas the Heed de-emphasised the problem to make the sibilance recognisable but not a listening concern. The piano was notable for offering a well formed and controlled presentation while adding a gentle swing. Pianos are a real issue for most hi-fi components because they can be chaotic in terms of dynamics but the Heed’s low noise aspect focused the piano, giving it great accuracy. Staying in the midrange, I was also happy to hear a real attack from the violins which would appear briefly to accent a lyric with emphasis. You really felt the bite of the bow on the violin at these moments.

This track doesn’t offer too much in terms of lower frequency but I was, nevertheless, impressed by the upright bass performance via the Heed pairing which added a measure of transient speed to the entire production.

Moving to more dynamic fare and Camel’s LP, Moondmadness with the track, Song Within A Song.

Two things impressed me about this rock presentation. Firstly, the bass was obviously powerful and meaty but it was restrained and remained within the master as opposed to dominating the entire soundstage. Thus, the music was powered by the bass and the bass was there to propel, it never swamped the master which would have overly warmed the mids. Hence, the balance of the sonic frequencies remained, allowing the upper mids to remain open and informative.

Secondly, the instrumental separation of the track, no doubt aided by the low noise design, meant that there was plenty of silence to encourage mini reverb tails and subtleties to protrude from the track. Noise can often mask music and is most effective at hiding the tiny nuances in a piece of music. Remove that noise and the music springs to life, giving you more detail and a greater sense of childish wonder at what you’re listening to. I got that from the Heed.

Finally, I gave Ultravox’s track, Sleepwalk, from the 1980 LP, Vienna , a brief listen. I wanted to hear how the Heed tackled this production with its punchy beats. Some phono amps see this track as a very ‘dry’ master but I was delighted to hear that the Heed decided to, instead, emphasise its more organic aspect. There was no sweetness in the presentation, the Heed didn’t move in the opposite direction but it did offer a greater degree of musical information. This allowed the track to sound balanced and more rounded, if you will.

Offering plenty of options, for the price, and a low noise output, the Heed Thesis pairing are both smooth performers that remove enough noise to allow your ear to dig deep into the master, accessing understated and elusive musical detail possibly for the first time.

HEED THESIS Φ (PHI) PHONO AMPLIFIER/THESIS Π (PI) POWER SUPPLY 

Tel: 01242 511133 

Website:  www.heedaudio.co.uk

GOOD: clarity, transparency, smooth mids, bass potential 

BAD: power light

REFERENCE SYSTEM USED

Origin Live Sovereign turntable Origin Live Enterprise 12” arm Transfiguration Proteus cartridge Icon Audio PS3 phonostage Aesthetix Calypso pre-amp Icon Audio MB 845 Mk.II monoblocks Quad ESL-57 speakers with One Thing mods Vertex AQ & Atlas cabling

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Thesis Lambda Pre-Amplifier

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PREAMPLIFIER

The Thesis Λ (lambda) is a preamplifier for the analogue-blooded fans. You can choose between five of your analogue sources and adjust the volume with an RC handset, but that is all you can get from the digital world by this clean-cut preamp. On the analogue side, however, it is the most refined preamplifier ever built by Heed.

The amplifier circuit of the Thesis Λ is the pure version of the Thesis α's analogue section. With the lack of digital circuitry, there is no reason to compromise anything. Aiming for the best possible sound quality, the Thesis Λ offers an unexceptional PCB design, unique to our Thesis line preamplifiers.

In a standalone mode, it is a very robust and capable device with its sturdy internal power supply. There is, however, an option to upgrade this remarkable performance to an even more astonishing level. The Thesis π external power supply adds more clarity, more accuracy and a great bunch of smoothness to the presentation.

It is far from us to lose you in technical terms. It is not our aim to teach you our profession or to provide you with numbers that are merely different from other devices. Electronic specifications and "correctness" are just one aspect and not enough to create perfect music reproduction alone.

Even so we ought to enlighten you about some of the specialties that make Heed products distinctive and stand out from the crowd. Naturally it is impossible to make a musical impression by words alone. Should you have the chance to listen to our creations then you can become acquainted with the relationships between the technical and sonic features of our products by studying the following chapters.

• 5 analogue inputs
• upgradeable analogue power supply (see Thesis Pi)
• fully remote controllable

SPECIFICATIONS

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Heed audio - thesis lambda - preamplifier, notify me when back in stock, lightning fast free delivery*.

Don't wait to start your audio adventure. With our lightning-fast delivery, your new high-fidelity audio equipment will be at your doorstep before you know it.

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Our services hit the high notes, but don't just take our word for it. Scroll down to read the rave reviews from our chorus of happy customers. They've heard the difference, and you can too.

Find out more on the Heed Audio Australia Website

T he Thesis λ (lambda) is a preamplifier for the analogue-blooded fans. You can choose between five of your analogue sources and adjust the volume with an RC handset, but that is all you can get from the digital world by this clean-cut preamp. On the analogue side, however, it is the most refined preamplifier ever built by Heed.

The amplifier circuit of the Thesis λ is the pure version of the Thesis α’s analogue section. With the lack of digital circuitry, there is no reason to compromise anything. Aiming for the best possible sound quality, the Thesis λ offers an unexceptional PCB design, unique to our Thesis line preamplifiers.

In a standalone mode, it is a very robust and capable device with its sturdy internal power supply. There is, however, an option to upgrade this remarkable performance to an even more astonishing level. The Thesis π external power supply adds more clarity, more accuracy and a great bunch of smoothness to the presentation.

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Heed Audio - Thesis Lambda - Preamplifier

Find out more on the Heed Audio Australia Website

T he Thesis λ (lambda) is a preamplifier for the analogue-blooded fans. You can choose between five of your analogue sources and adjust the volume with an RC handset, but that is all you can get from the digital world by this clean-cut preamp. On the analogue side, however, it is the most refined preamplifier ever built by Heed.

The amplifier circuit of the Thesis λ is the pure version of the Thesis α’s analogue section. With the lack of digital circuitry, there is no reason to compromise anything. Aiming for the best possible sound quality, the Thesis λ offers an unexceptional PCB design, unique to our Thesis line preamplifiers.

In a standalone mode, it is a very robust and capable device with its sturdy internal power supply. There is, however, an option to upgrade this remarkable performance to an even more astonishing level. The Thesis π external power supply adds more clarity, more accuracy and a great bunch of smoothness to the presentation.

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Heed Thesis Lambda

California Audio Show 2017 – Show Report One

Posted on August 1, 2017 April 9, 2020 Author Jack Leave a comment

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HEED AUDIO THESIS LAMBDA

Description.

The Heed Audio Thesis λ (lambda) is a preamp for analogue fans.

– 5 analogue inputs

– upgradeable analogue power supply (see Thesis Pi)

– fully remote controllable

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Heed Audio Elixir review

Heed's no-frills stereo amp gets the basics just right... tested at £750.

What Hi-Fi? Verdict

If you only need analogue inputs, this entry-level Heed is worth considering

Open, spacious soundstage

Bold, energetic listen

Fluid dynamics

Built-in phono stage

Lacks bass weight

Outclassed in subtlety

Marmite design

No DAC or Bluetooth

Why you can trust What Hi-Fi? Our expert team reviews products in dedicated test rooms, to help you make the best choice for your budget. Find out more about how we test.

After going upmarket with the high-end Thesis range , Heed Audio has returned to more humble pastures with its new Elixir: an analogue-only integrated stereo amplifier targeted at first-time hi-fi buyers.

More affordable than usual for the Budapest-based brand, it sits below the Thesis and Obelisk lines, but borrows the design principles found in Heed’s TransCap amps, like the 2012 Award-winning Obelisk si , and has a decent output of 50W per channel into 8 ohms (or 65W per channel into 4 ohms).

MORE: Heed Audio Thesis review

So what gives? Our first thought is that the Heed feels like a cheaper product than its price suggests.

Everything from the half-width casing (available in black or silver) and the front panel controls to the compact remote control feels a little too budget for our tastes, even if the build quality seems solid enough.

The simplistic labels that light up for each don’t help the Elixir’s cause, nor do the dodgy font choices.

Lined up next to its biggest rivals, including the Rotel A14, Audiolab M-One and Cyrus ONE , it’s almost certainly going to be your last pick.

There’s also the absence of a DAC, and unlike some of Heed’s higher-ranging models, it isn’t compatible with the brand’s separate DAC module.

Ergo, digital responsibilities will have to be taken care of by a CD player or streamer, which can connect to the Elixir’s four line-level inputs.

The Heed can welcome a turntable with open arms though, thanks to its built-in moving-magnet phono stage, based on the circuitry from Heed’s dedicated (and once multi Award-winning) Questar phono amp, and a Class-A headphone amplifier drives a 6.3mm jack found on the front panel.

There are two pairs of speaker connectors onboard, and a pre-amp output for adding to the Elixir’s output if you wish.

MORE: Best budget stereo amplifiers 2016

Thankfully, no such compromise has been made where sound quality is concerned, and it only takes a brief listen to the Heed to push any reservations we have about features and design to the back of our minds.

We ease our way in with Nina Simone’s Blues for Mama , but the Heed takes no such approach. Its easy-listening balance ­– authoritative and bold, but not too forward – captures the playful persona of the schmoozy blues track from the first note.

The perky piano, cymbals and distinctive vocal are all presented on a level playing field, the latter brimming with subtlety as the Elixir ensnares Simone’s intrinsically dulcet tone and hangs onto her every rasp.

MORE: Best hi-fi deals – CD players, amps, DACs and more

It ruminates just as much on Matt Berninger’s brooding delivery in The National’s Graceless , even if the Rega Elex-R gets under his vocal nuance more convincingly.

There’s enough space around it for the emotion and expression to come through, and that’s indication of the amp’s roomy soundstage.

It fills the space sensibly; detail retrieval is ample, which applies as much to the more inconspicuous piano notes and cymbals as the dominating drums, and dynamically it’s fluid and free.

MORE: Rega Elex-R review

It’s no slouch, either, driving the track’s propulsive rhythms with momentum and crisp, precise timing, and dovetailing the charged drumbeat and bass guitar into a logical whole.

But by sacrificing a little low-end weight and richness, the Heed doesn’t quite anchor the bassline as much as it should.

The case remains as we switch to Pink Floyd’s In The Flesh? on vinyl, but elsewhere we’re impressed with the Heed’s detailed articulacy and determination to afford as much energy and power to the track; good news indeed for vinyl enthusiasts.

MORE: Best stereo amplifiers 2016

By pitching itself as a beginner-friendly, analogue-only amp, the Heed Elixir puts itself somewhat on the back foot in terms of versatility, especially in the face of its many DAC-including, hi-res music-supporting rivals.

Still, it’s allowed Heed to focus on what really matters: sound quality. And it’s paid off. The Elixir is a simple machine but, for the right buyer, is no less attractive for it.

Buy the Heed Audio Elixir here from eBay

See all our Heed Audio reviews

What Hi-Fi?, founded in 1976, is the world's leading independent guide to buying and owning hi-fi and home entertainment products. Our comprehensive tests help you buy the very best for your money, with our advice sections giving you step-by-step information on how to get even more from your music and movies. Everything is tested by our dedicated team of in-house reviewers in our custom-built test rooms in London, Reading and Bath. Our coveted five-star rating and Awards are recognised all over the world as the ultimate seal of approval, so you can buy with absolute confidence.

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HEED - Thesis Lambda - Preamplifier

• 5 analogue inputs
• Fully remote controllable
• Upgradeable analogue power supply

The Thesis λ (lambda) is a preamplifier for the analogue-blooded fans. You can choose between five of your analogue sources and adjust the volume with an RC handset, but that is all you can get from the digital world by this clean-cut preamp. On the analogue side, however, it is the most refined preamplifier ever built by Heed.

The amplifier circuit of the Thesis λ is the pure version of the Thesis α’s analogue section. With the lack of digital circuitry, there is no reason to compromise anything. Aiming for the best possible sound quality, the Thesis λ offers an unexceptional PCB design, unique to our Thesis line preamplifiers.

In a standalone mode, it is a very robust and capable device with its sturdy internal power supply. There is, however, an option to upgrade this remarkable performance to an even more astonishing level. The Thesis π external power supply adds more clarity, more accuracy and a great bunch of smoothness to the presentation.

You may also like

Recently viewed.