Technics Tech Tips

DO NOT “INTERNAL GROUND MOD” YOUR TURNTABLES .

It’s a bad idea, don’t do it!

To put it basically, it introduces the possibility of ground loop issues depending on your set-up and also makes your equipment less safe to use. If your Technics turntable has been ‘internally grounded’ and then has a major electrical fault (from drink spills and other misuses), you can destroy other equipment in the chain such as an amplifier. There are other technical issues that can arise too. The engineers at Technics designed their turntables to have a separate ground wire for a reason.

But my RCA cable is grounded when it gets to the mixer, so why should it matter?

The chassis ground and the audio ground must not be connected UNTIL it reaches the mixer (or any other phono pre-amp). The fact that the audio and chassis grounds are connected within the mixer/pre-amp does not mean they should be connected outside of it. There are capacitance and inductance effects which result from doing an “internal ground mod” which can cause interference and reduced audio quality (mostly a reduction of high frequencies).

For more information download the article about the issues with internal grounding from Richies Technics 1200/1210 Servicing here: Internal Grounding Info

We re-install missing or broken ground wires on every Technics turntable service at no extra fee.

USE A SURGE PROTECTOR FOR YOUR PRECIOUS TECHNICS TURNTABLES

Voltage spikes and surges can damage the major IC (Integrated Circuit) components on your turntables. These parts have been discontinued for the SL-1200MK2 etc. (also found on some other models such as SL-1600MK2 and SL-1800MK2) and supplies are diminishing. Spares for other models that use different IC’s are not available at all.

Make sure that you use a good quality power board with surge and spike protection for your turntable, this will greatly reduce the chance of these components inside your precious Technics turntables failing.
If you’re on a budget, name brands like HPM and Belkin are fine. Just look for a surge board with the highest Surge Protection rating (in joules). A good example is the HPM D105TVAV8BL 8 outlet board with a 3,150J rating (approx. $60).
If you’ve got a higher budget you can go for a higher quality surge board such as the THOR A12BF SMART BOARD 8 (approx. $330).