Icon Audio Stereo 40 MkIV Integrated Amplifier

Here we have a Mk IV version of the Stereo 40 Integrated Amplifier from British company Icon Audio. The Stereo 40 has been around for a while now and available in a number of different incarnations with different valves. It comes in very good condition, with original factory packaging, remote control, manual, mains cable and our normal three month warranty.
Icon Audio Say….
Exceptional performance at a modest price!
The Stereo 40 MKI was our first model in 2001 and has always been a special product to us. Since that time we have substantially improved it over the years.
In its latest guise, the MK IV has several upgrades making it exceptional value.
Headphone Socket – Exceptional quality is provided by using separate HQ windings of the output transformer. Not attenuation is used to give a very open sound. Suitable for 8 to 500 Ohms. Giving greater flexibility of use.
Ultra linear or Triode? For sixty years hi fi fans have argued which sound is better. With the Stereo 40 IV you have the choice of both at the flick of a switch. It is like having two amplifiers in one!
In conjunction with our re-designed output transformers, the Ultra linear Power is now over 50 Watts. This gives greater instantaneous power available for heavy transients, and a more solid bass.
We know that majority of customers use the Triode Facility most of the time. The Triode power is now 30 Watts enabling use of all but the most inefficient speakers.
Using a “cascode” configuration for the first stage enables us to use the venerable 6SN7 valve for all the driver circuit functions. This gives better definition whilst improving the frequency response at lower volumes. This also simplifies valve replacement as the amplifier only uses two valve types.
Choke Regulated Power Supply – Working in conjunction with the smoothing capacitors the large choke gives super-smooth power regulation for a silent background.
Tertiary Transformers have an extra (third) winding which reduces distortion, using less global feedback. We believe our large handmade output transformers to be amongst the finest available. They are more expensive and difficult to make, but worth the effort.
Low Feedback – Too much feedback can spoil the sound of an amplifier. We only use a small amount in the Stereo 40 MK IV.
Remote Control – Useful to get exactly the right volume in your listening chair position. Allows fine adjustment of the right sound level.