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Kronos AV
Kronos AV
Heed Audio
Creating something is a wonderful feeling. To witness the numerous pieces of electronic and mechanical parts being hand crafted to form a complete working device is delightful. Every single component receives exacting attention and is the perfect element to provide you with an unrivalled musical experience.From the hand soldering of the circuit boards to the fine adjustments of the volume knob, we ensure every process and incorporate only the highest quality components to make a Heed amplifier the best in class. Rigorous quality control provides the highest possible standard and reliability of our devices. Every single device meets our strict performance regulations but similar to twins, we know that each and every one produced is unique to you.

Heed Audio Thesis Lambda Pre-Amplifier with Analogue Inputs
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  • Regular price £2,395.00
  • Available Worldwide Shipping

The Thesis λ (lambda) is a preamplifier for the analogue-blooded fans. If you don't require the luxurious benefits of the α (alpha) preamplifier and have digital connectivity - or just want an exclusively analogue bias, the Thesis λ (lambda) is a partner you will want to live with. 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 (lambda) is the pure version of the Thesis α (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 (lambda) 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 (pi) power supply adds more clarity, more accuracy and a great bunch of smoothness to the presentation.

Like the Thesis α (alpha) preamplifier, the Thesis λ (lambda) is a preamplifier that has been lovingly assembled internally by the craftsman at Heed - it is also immaculate in conception in the flesh too. The casing is finished to the highest standard with the smoothest of black powder coated finishes and discrete wrapped sides. The extruded aluminium fascia fits onto the casing supremely and the source selection and volume controls are twinned to the fascia with a luxurious weighted feel. The front panel has black lit white indicators for an almost 'retro-futuristic' feel, akin to classics of the past and even an ornate art deco piece. The Thesis λ (lambda) also has remote control source and input selection and attentuation for volume control too.

The rear of the unit as outlined above has a plethora of analogue interconnectivity, all clearly defined and partitioned in black and white like the salient points of the most measured and well reasoned arguments. For dedicated analogue lovers the proposition to live in the music and become part of it has never been a simpler, clearer choice.  

Available in a black casing with aluminium fascia (and controls).

5 analogue inputs
Upgradeable analogue power supply (see Thesis Pi)
Fully remote controllable
High quality casing and fascia

Inputs: 5 x analogue
Outputs: 1 x preamplifier output / 1 x tape out
Power supply options: Internal / Thesis Pi
Max. consumption: 60 W
Dimensions (WxHxD): 22 x 8.5 x 36 cm

We are still delivering orders as normal. When your order ships you will still receive tracking details. For UK shipments, Our couriers have procedures in place to ensure deliveries are arriving as quickly & safely as possible. Drivers can now sign for your parcels, however will notify you that they have arrived, in order to ensure you receive your parcel. Signing for the parcel has now been stopped temporally for hygiene reasons. Drivers are also working with customer instructions, so you can ask them to leave the parcel in a safe place (doorstep etc...) if you prefer not to come into direct contact with the driver.

There has been no changes to deliveries with Brexit. All deliveries to the UK mainland, Northern Ireland and the Republic of Ireland are operating as normal. No VAT or charges are applicable. 

Express Deliveries

Express Delivery is FREE on all orders over £50. Express Delivery offers delivery in 24-72 hours from time of purchase. We use premium couriers for this service, mainly DPD & Royal Mail. DPD will offer you a one hour window for delivery to make sure someone is at home, or you can reschedule the delivery if no one is around. 

Standard Deliveries

Here at Kronos AV, we have vast experience with e-commerce sales. Making sure that your parcel arrives undamaged is a huge priority for us. That’s why at Kronos AV, we only use premium couriers for all our orders. All our parcels are shipped with DPD or Royal Mail and are always sent Signed For to make sure it gets to the right person. 

If for any reason your parcel does arrived damaged, please get in touch, and we will be happy to get everything resolved for you. We are always on hand to help!


Delivery is FREE on all orders over £50. In order to offer FREE delivery to UK customers, we use several premium couriers to ensure your delivery arrives safe.

Most large orders (over 2kg) ship using DPD or DHL courier and smaller orders (under 2kg) by Royal Mail signed for services.

The most appropriate courier will be chosen for the items ordered to ensure the quickest possible delivery.

We can offer very generous trade in offers across the majority of our product range. 

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If you have any question, please feel free to call us on 03435236169 or email