Sample Ohms and Watts Chart Card


New Musician Guides from
Dave Zimmerman

Dave spent the past two years writing books and articles to help you get the most out of the gear you have. These guides will help you get the sounds you're hearing in your head using your current rig with just a few changes-- when you need it most--right when your amp starts acting up!

Domestic customers please place an order with amazon.com. To save shipping costs, international customers please order from amazon.co.uk.

ebooks are available at amazon's kindle store, Barnes & Noble and the iTunes store.






"There's a wealth of information here on biasing, impedance matching, speakers, tube saturation, and classic tube amps... this easy-to-understand guide is well worth the investment."

Art Thompson
Guitar Player magazine
October 2010, p. 30





  • Speaker Ohms and Watts Chart cards, $12.00

    The geekiest thing that you will be expected to understand as a guitar player is ohms. Ohms is simply a measure of how much a circuit resists or impedes the flow of current when a voltage is applied to it... and you can use it to mold your tone, but only if you know what impedance settings to select on your amp. This set of six business-card-size easy reference charts give you the correct impedance settings and wattages delivered to each speaker when connecting two speakers to 30, 50 and 100 watt amplifiers in both series and parallel. Never again calculate, or worse, guess the correct impedance setting again.



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