How to Bias a Marshall 1986 50w Bass

Learn how to Bias a Marshall JMP 1986 50w Bass amplifier.

If you want to learn how to bias your Marshall 1986 500 Bass you’ve certainly come to the right place!

PLEASE NOTE: I’m guessing that you’ve probably noticed already. There ‘s absolutely loads of free information on the web about how to bias Marshall amplifiers. That’s great. Unfortunately, most of it is plain wrong and in many cases, it’s even dangerous.

We are dealing with very high voltages here so there’s no room for error or amateur electronics. It is mainly written by well-meaning amateurs and amp enthusiasts who have gained a little knowledge along the way – so just enough knowledge to make them, and you, dangerous!

So we’ve put together the definitive comprehensive bias manual for this Marshall amplifier.

It will take you step-by-step through every stage of the process and how to perfectly bias your Marshall Super Bass 100 amplifier. The important thing is that it is written by a senior electronics engineer who has over 40 years of experience in the amplifier industry. He has repaired and modified thousands of amplifiers in his career. So this is the ultimate guide for your amp – all made extremely clear and simple.

To get your superb 15-page copy of How To Bias a Marshall JMP 1986 50w Bass amplifier simply click on the ‘add to cart’ link above.

How to bias Marshall amplifiers correctly: The Definitive Expert Guide.

We kindly ask for a small fee to cover the many hours it took to produce this document and photograph the entire process for you.  The good news is you will receive an email receipt straight away along with a download link.

This download link means you can download the PDF directly to your computer straight away. So there’s no waiting for the postman to turn up or missing copies in the post – you just download your copy immediately. This also means we can produce it at a very low price as we don’t have printing or shipping costs.

So to download your bias manual, simply click on the product name that appears in blue and underlined when you receive your invoice. This is the link for you to download your personal copy.

So order your bias manual today and get your amp sounding better than ever. If you have any questions don’t hesitate to drop us an email. Also, do take a look at our FAQ section. Here we answer all the most popular questions we get asked each week. You will also find lots of hints and tips on upgrading your valves.

Questions we often get asked about the JMP 1986 50w bass amp.

Q. “What’s the difference between the Marshall 1987 lead circuit and the Marshall 1986 bass circuit?
How much do these two 50 watt amps differ in tone for guitar use?”

A. The 1987 amp will be brighter and break up a little earlier. Naturally, it will also be more aggressive.”