CMoy / Grado RA-1 Headphone Amplifier

Mark is keeping busy on the hobby front and has completed another DIY Audio Project, a battery powered headphone amplifier. His DIY headphone amplifier follows the idea of the very popular CMoy headphone amp which is a basic non-inverting amplifier using an operational amplifier (op-amp). The amplifier circuit is contained on a basic IC protoboard, uses the Burr-Brown OPA2134PA op-amp and is powered by two 9-volt batteries.


The idea to house the DIY Headphone Amplifier in a wooden enclosure was taken from the Grado RA1 headphone amplifier which is contained in a beautiful mahogany box.


Mark is very pleased with the performance of this simple and inexpensive headphone amplifier project. For full details, including additional pictures and the schematic, see the DIY CMoy / Grado RA-1 Headphone Amplifier Project page.


Related Posts:

• Grado RA-1 Headphone Amplifier
• DIY CMoy Mint Tin Headphone Amplifier
• DIY CMoy (Grado RA-1 clone) Headphone Amplifier

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Zigmahornets with Fostex FE103E

Barry's first DIY Audio Project was a small pair of DIY DelSol Aura NS3-194-8E Bookshelf Speakers. He has since moved on to bigger and taller speakers! His latest are another pair of fullrange loudspeakers, the Fostex FE103E Zigmahornets. The original Zigmahornets were designed using the now discontinued Fostex FE103 driver. But like many others, Barry is reporting good results with the newer Fostex FE103E speaker driver.


In his short article, Barry shows us how simple this speaker project is and how you can easily build a great sounding set of speakers without your own table saw. Barry reports that the sound is clear and clean with good bass response from the small driver.

For additional information and pictures, see the complete page of Barry's Fostex FE103E Zigmahornets.

Related Fullrange Speaker Projects:

• DIY Fostex FE127E Sealed Bipole Speaker Project
• Jordan JX92S DIY ML-TL (Transmission Line) Speaker
• Fostex FX120 ML-TQWT Speaker Project

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DIY Speaker Cables and Photo Gallery

Adam's simple DIY Speaker Cables have been added to the DIY Audio Projects website. The cables are very simple, using 16 gauge wires that are braided together. The cables are finished off with TechFlex to produce that nice "Hi-Fi Shop" touch. Adam uses the cables with his DIY Hi-Vi 3-Way Tower Speakers.

In addition, a DIY Audio Projects Photo Gallery has been added to the site. Please feel free to upload photographs of your projects to share with other DIYers.

Related DIY Hi-Fi Cable Projects

• DIY Silver RCA Interconnect Cables
• Belden 89259 RCA Interconnect Cables
• DIY Shielded RCA Interconnect Cables
  
• Cross-connected Belden 89259 DIY Speaker Cables 
• DIY Low-Inductance Speaker Cables
• Belden 83803 DIY Mains Power Cable

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