Icon Audio HP250D Valve Headphone Amplifier
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  • Regular price £2,999.00
  • Available Worldwide Shipping

We believe that Directly Heated Triodes bring you closer to the music!
Many audiophiles have discovered that a simple well designed valve amplifier can give greater purity and intimacy than more complex solid state designs. This is especially true of headphone amplifiers and the 1920s W.E. 205D is about as simple as a valve gets! Taking inspiration from our highly rated HP8 headphone amplifier and the remarkable WE 205D valve, we have designed a deceptively simple amplifier which has surpassed even our own expectations!

The 205D is a Directly Heated Triode designed by the Western Electric Co in the 1920s and is probably the oldest valve in current production! As a small power output valve it has all the right qualities for headphone use, being very linear in operation. High end headphones can be very revealing sounding clinical and overly bright with some amplifiers. Sonic presentation with the 205D and our output transformers has the highest definition and incredible dynamics but in nice way, more vivid and warmer sounding. Completely free of fatigue.

Headphones have the ability to convey incredible detail and insight into a recording so careful circuit design is called for. Like any valve amplifier the output transformers are crucial to the final quality and our own custom designed and wound transformers play an important part in this. Also an advanced design using Directly Heated Triodes such as this demands the highest quality power supplied by outboard power supply using a time honoured valve rectifier and choke circuit.
Although headphones have only a tiny power requirement of no more than one Watt, we have taken the same care and attention to detail that is required with any “high end” design, every component is chosen carefully to avoid negatively influencing the ultimate sound quality.

As in our other designs the HP205D is hard wired throughout (without using printed circuit boards) not only for better sound quality by using full size components and easier upgrades but for easy future service.

The 205D is driven by an ECC88 a modern valve which ideally complements the 205D technically and sonically.
The HP205D may be used as a stand-alone unit or as part of a hi fi system. The optional Bluetooth receiver make the HP 205D very versatile in use.

Built in Bluetooth option
• All hand wired point to point 
• No printed circuit board to ‘colour’ sound
• Japanese Blue ALPS volume pot.
• Class A, all Triode circuit
• Output impedance matching from 16 to 600Ω
• 2 x 205D for output 2x ECC88 input valve
• Psvane and Full Music upgrade valves available
• Signal to noise level -90db
• Freq response better than 20hz-20kHz +0 –0.2db
• High quality oversize resistors 
• SCR audio capacitors, upgrades available
• Custom hand wound output transformers
• Ceramic valve holders for minimum leakage
• Silver PTFE audio cable
• Gold plated Input/outputs
• Loop through facility
• 350mv input sensitivity.
• Comprehensive manual supplied
• 220/240volts 36 watts.
• 16cm W, 27 D, 16 H, 7kg 
• Carton 37Wx27Dx30H 7.0 kg
• C E, ROHS and WEEE compliant
(Provisional specifications subject to change)

Headphone amplifier designed for the highest quality headphones. Built as a “Single Ended Triode” amplifier.

We have several deomonstation areas in both of our branches. Please give us a call on 03435236169 or email support@kronosav.com to enquire about hearing products at your local branch. 

Please always contact us before to make sure the product(s) are available

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. 

Why not ask and see how much you HiFi is worth!

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If you have any question, please feel free to call us on 03435236169 or email support@kronosav.com