There’s been a lot of highly positive feedback of my work publicly posted on the Web. Here’s a selection of recommendations and feedback:
‘The upgrade work carried out to the WD Power, Pre and Phono has lifted the system beyond what I had wished for. David gives a reliable, knowledgable cost effective service with good communication and is very accommodating…. What more can you ask for?
The Custom built DACs, hand built and professionally finished in high spec casings are also of a very high standard and sounded utterly wonderful. A great alternative to inferior price point products available in the commercial HIFi world. No Middleman, no BS, No advertising and marketing…It just makes sense!
General Recommendations 2
General Recommendations 3
Ear Headphone Amp Upgrade
Goodmans Magister Restoration
DDDac see post 8 of thread
The picture below shows the completed upgrades. All electrolytics have been replaced. There’s 12 alone in the power supply, and many more across the pre and phono boards. Elena Silmics have been used where space permits, otherwise Panasonic FC and Nichicon Muze. None of these is in the signal path. The main input and output capacitors-originally metallised film have been replaced with foil /film types. All components were mounted as in the original preamp, with the exception of two in the phono stage which were mounted slightly above the board to allow for nearby warm running resistors.
This arrived recently in the workshop.A power supply electrolytic has blown, taking out the fuse. From a visual inspection that appears to be the sum of the problem. Electrolytic failure is very common in these sub woofer amps. A lot of heat in a small sealed box with low temp rated capacitors is a recipe for relatively frequent failure. Capacitors will be replaced with uprated ones.
This iconic preamp is in for upgrades and service. It’s beautifully designed and much easier to work on than many a piece of kit!
Here are the finished speakers. New mid and treble drivers were installed and new crossovers built. The original crossovers sent all the music signal to the bass driver with no filtering! The two photos show the finished speakers still wrapped in Cling Film for protection but sounding great after several hours running in. The first photo shows the old crossover that simply filtered the mid and treble drivers but not the bass. For comparison the components for the new crossover are shown alongside.
The tweeters used are Scanspeak R2604s and the mid range units Peerless NE123Ws. Crossovers were built using Jantzen Cross Caps, Jantzen inductors and Mundorf resistors.