John R. Frondelli has written a new “How To” DIY article on Hot-Rodding the new Fender Champion 600 amp. John takes you through the entire project with easy step by step instructions. Hot-rod parts kits are available from dBm Pro Audio. Make your Champion 600 come to life with this DIY article. You can find [...]

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    Last year, Fender did the unthinkable…they commenced tube amp production in China. Many players first thought was “Oh God, what IS this world coming to?” After all, tube amps are an AMERICAN thing, right?
As someone on the inside of the industry, I can assure you that Fender is NOT trying to upset the balance [...]

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 300guitars.com is proud to announce the launch of a new page called “Spotlight”. A tech, artist, manufacturer or the like will be featured periodically with an in-depth look and interview. Our first Spotlight features John R. Frondelli the Technical Services Director of dBm Pro Audio in NYC. In his interview he talks about the repair and restoration [...]

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John R. Frondelli is the Senior Technician and General Manger at dBm Pro Audio in NYC. During his 35 years as a technician he has worked on numersous pieces of musical equipment and dealt with many different types players including some celebrities. Every player is different and every project is challenging and rewarding at the [...]

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 We are a world in crisis. The inherent greed and gluttony has been turned inward on us. This time however, it is not the collapse of the Roman Empire at stake, but the destruction of our life-supporting ecosystems. Mother Nature is trying to say that she’s had enough.The electronics industry has always employed the use [...]

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 Tremolo…..it almost seemed like it had disappeared for awhile during the whole boutique “less is more” amp craze. Then Cesar Diaz released his famous Texas Tremodillo pedal, and tremolo was reborn. Soon, tremolo was popping up again in every manufacturer’s amp line. What I will unlock here is the “mystery” behind the tremolo circuit, what [...]

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Of all the circuits in a tube amplifier, the Phase Inverter, also known is the Phase Splitter, is the most difficult to understand by even some experienced techs. Its function is relatively simple: take a signal input, and create two outputs, one that is identical (e.g. in-phase) to the original, and another that is a [...]

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