Power Amplifier Kits
 World Designs 2017

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 £670

XL version £730


Power Amplifier Kits

KT88 Power 35W

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. The KT88 outclasses many much more expensive rivals. Based around the classic KT88 valve in Push Pull Ultralinear configuration, this astonishing amplifier develops over 35 Watts of clean power with a beguiling musical performance. The KT88 valve has been used in many a classic amplifier since GEC developed it in the 1950s, and our implementation is a fine way to get the very best from the valve. The XL upgrade option features boutique components such as Schottky diodes for both main rectifier and heater supplies, Pi filter DC heater supply, Soniqs ICT signal cables, Soniqs SAX signal path and Rifa Low ESR Power capacitors. 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 £1200

XL version £1400