Power Amplifier Kits
 World Designs 2022

World Designs offers two power amplifier kits for use with high quality Pre Amplifiers like the Pre3. Choose between the easier to build KEL84 integrated

(15W) or the more powerful KT88 model (35W). They are based on the integrated amplifiers, without input switching. Both are available with our XL

upgrade option which adds audiophile components where they matter most. Our designs use auto bias for ease of set up and long valve life. For built

versions please visit our Build Service page.


KEL84 Power 15W

The KEL84 features a pair of EL84 valves in push pull configuration, providing 15 watts per channel into an 8 ohm load. The output transformers are Ultra Linear keeping distortion down to a minimum. This kit amplifier is  configured with a single line level input with a high quality volume control. An ideal low cost introduction to valve amplifiers. For those who want the ultimate performance from this amazing amplifier there is an XL option which includes high performance Vishay HT supply capacitors, Schottky Rectifier Diodes for lower noise heater supply, Soniqs polypropylene coupling capacitors and Soniqs ICT interconnect cable for internal audio signal wiring. Read the full review in Hi-Fi World May 2012 edition, where it was awarded full marks or see the summary on our Reviews & Gallery page. External dimensions with valves: W301 x D310 x H153mm. Weight: 9kg

Standard version £745

XL version £835


Power Amplifier Kits

KT88 Power 35W (Class A)

This is our flagship amplifier and is an asset in any music system. A perfect blend of power, control and subtlety makes

this an amplifier that you forget is there. Combining the inherent musicality of Class A operation with high quality components, the KT88 outclasses many much more expensive rivals. This amplifier is powered by KT88 Kinkless Tetrodes in a Class A Push Pull Ultralinear  configuration. The KT88 valve was designed by GEC as a high quality audio power valve, and this is an excellent example of how to get the best from that valve. Read the full review of this amplifier in Hi-Fi World November 2012 edition, where it was awarded top marks or see the summary on our Reviews & Gallery page. External dimensions with valves: W406 x D343 x H180mm. Weight: 16.5kg

Standard version £1340

XL version £1550