Icon Audio Stereo 25 MKII Valve Integrated Amplifier
Free Gift

  • Sale
  • Regular price £1,399.00
  • Available Worldwide Shipping

A “Simple Design” version of our award winning Stereo 40 at half the price!

Ideal first valve amplifier with plenty of valve power to drive most loudspeakers.!

In essence a simplified ST40 MKIII, yet no reduction in quality, this is our best value integrated amplifier. Features include the excellent 6SN7 and 6SL7 valves for improved sound, and a headphone socket with excellent performance.

Our simple bias circuit means that valve replacement of the same type requires no bias adjustment*. Yet retains the ability to use “tube roll” different valves, so the ST25 MK II is designed to use: 6L6, EL34, 6CA7, KT66, KT88, 6550.

If you are new to valves the Stereo 25 MK II is an excellent starting point. With ample power, its affordable price and excellent power make it an ideal “starter” amplifier to find out what valves can do for your system.

The inclusion of a dedicated headphone winding on the output transformers guarantees the best possible performance. Giving a closer intimacy than is possible that with solid state headphone amplifiers. 


Very “affordable” straightforward integrated amplifier based on the ST40 III with a first class headphone socket!

Low maintenance and easy to use.

(Typical conditions EL34 valves@ 240v 50Hz. 8 Ω)

  • 6L6/EL34/6CA7/KT66/KT88/6550 output valves
  • 6SN7/6SL7 double triode driver valves
  • Class A, all Triode front end
  • Ultralinear output circuit
  • Triode version by request 19+19w (no extra charge)
  • Hand wired point to point. No printed circuit board
  • 30w RMS per channel Ultralinear (EL34)
  • 4 and 8ohm loudspeaker output
  • Tertiary Wound Transformers
  • Frequency response 20-20khz +0 – 0.5db
  • THD typically less 0.5% 1kHz
  • Hand wound transformers
  • Attractive valve cover included in the price
  • Hi Fi quality Solen capacitors
  • Silver PTFE audio cable
  • Gold plated Input & speaker sockets
  • 3 line Inputs for CD, Tuner, Phono etc
  • 250 mv input for full output
  • 220/240volts, 100w (180w max)
  • 34cmW, 34D, 22H (overall) 17kg
  • CE, ROHS & WEEE compliant
  • Comprehensive manual supplied

*No bias adjustment if the valves are changed for the same type. However bias adjustment and test points are included to get the optimum performance from a wide range of output valves.

The driver circuit is inspired by the Leak Stereo 20/50/60

(Specifications subject to change, errors & omissions excepted. General July 2018)

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. 

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

To find out how much your HiFi is worth... Click Here

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