Affordable, Quality Audio Repairs & Restorations
Phone:
519-513-1084
Email:
repairs@dnaelectronics.ca
Address:
15 Shaftsbury Dr. Kitchener, ON, Canada
Quality, Reliable Restorations by Experienced Father & Son Technicians. We Take Pride in our Workmanship.
Receivers | Power Amplifiers | Integrated Amplifiers | Preamplifiers | Tuners
D 'n A Topics & Resources
Restoration Information
Audio Specifications Database
Audio Picture Gallery
Our Testing Procedures
FAQ
Restoration Information
General information about our restoration work, and pricing information for various models.
Audio Specifications Database
We are compiling a database of audio equipment specifications gleaned from our annual equipment directory magazines, owner's manuals, service manuals, etc.
Audio Picture Gallery
Pictures of some of the equipment we've worked on, with occasional commentary.
Our Testing Procedures
We test the audio components we restore to ensure they perform at least as well as expected. This is both an overview of our measuring procedures, and an attempt to make clear exactly what is being measured.
FAQ
Answers to some frequently asked questions.
Sponsored Link
Pioneer SX-939 Gallery
The power supply board before rebuilding.
The original main power supply filter caps. Note that the one on the left has ruptured.
The replacement filter caps.
Sponsored Link
Pioneer has manufactured a plethora of audio components: power amplifiers, integrated amplifiers, preamplifiers, receivers, tuners, CD players, tape players, turntables, equalizers, loudspeakers, and more! Like other audio companies, Pioneer's golden era was arguably the 1970's, and Pioneer components from the 70's are very popular with audiophiles and collectors.
D 'n A Electronics is a Father & Son business located in Kitchener, Ontario, Canada. We specialize in restoring hi-fidelity audio power amplifiers, integrated amplifiers, preamplifiers, receivers, and tuners. We've been repairing vintage audio equipment since long before it was considered vintage! It is our goal, and pleasure, to reliably restore hi-fi audio equipment to original operating condition (or better!). We accept shipments from across Canada, and many customers from Kitchener, Waterloo, Cambridge, Guelph, Hamilton, London, Toronto and surrounding areas find us to be within convenient driving distance. Thank-you for visiting our website, we look forward to serving you!
Pioneer's 40 lb. (18 kg), 70 Watt per channel, SX-939 receiver. You can check out more of the SX-939 specs here.
The SX-939 has 4 output transistors per channel, which is a bit unusual for a 70 Watt receiver; most have only 2 outputs per channel. Like most popular receivers of the vintage (c. 1976), the SX-939 is well built.
If you have an SX-939 receiver that is in need of repair, call us at (519)513-1084, or email your enquiry to repairs@dnaelectronics.ca.
Note: Some pictures are from before the restoration.