Continuous Amps 100 Watt Amplifier Draws Diyaudio

DIY Audio Projects - DIY Hi-Fi for Audiophiles

DIY Audio Projects

Do-It-Yourself (DIY) Audio Projects - projects for audiophiles, hi-fi enthusiasts, music lovers, electronic hobbyists, woodworkers and those who like to learn, build and listen to music. This site exists to promote the hobby of DIY Audio. There is nothing for sale here. All project documentation presented on this site is free for personal non-commercial use. If you have a DIY Audio Project that you would like to share with others through this site, or if you have any comments, contact us or post a message on the DIY Audio Projects Forum. Questions about a specific projects can be sent to the project author noted at the top of the project page. If you are new to DIY Audio but want to learn more, take a look at our DIY Audio Book recommendations.

Last update: 17 January 2022

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DIY Audio Projects

These are some of our featured DIY audio projects. For more DIY projects, use the navigation menu on the left hand side of the page.


High Fidelity Tube Junk Box Audio Amplifier High Fidelity Tube Junk Box Audio Amplifier - 10 November 2019USA Flag

Bruce Heran outlines the design and construction of a High Fidelity Tube Junk Box Audio Amplifier (JBAA). The schematic is similar to the PoddWatt design and able to use a huge variety of tubes. The JBAA tube amplifier can use a 12AX7, 12AU7, ECC82, ECC83, 5751, 12SL7 or 6SL7 in the driver position while 6V6, 6AQ5, 6005, 6Y6G, EL84, 6BQ5, 6F5P, 6P15P-EB, 6Y6GA, 6K6, 6W6, 6GV8, 6BM8, ECL82 or ECL85 can be used for the output tubes. The circuit is biased into Class-A, ultra-linear operation and output power will be dependent on the tubes utilized.




6EM7 Single-Ended Triode (SET) Amplifier 6EM7 Single-Ended Triode (SET) Amplifier - 29 June 2015USA Flag

Matt describes the design and construction of a Single-Ended Triode (SET) amplifier built around a pair of 6EM7 double triode tubes. The clean output power from the 6EM7 SET amplifier is about 2.2 Watts per channel with a frequency response that matches the audio output transformers. The single-ended 6EM7 amplifier is housed in a vertical wooden chassis that has been styled after early vacuum tube equipment of the 1920s. The 6EM7 SET amplifier uses a 6CA4 tube rectified power supply with excellent channel separation and which is very quiet. Matt reports that the 6EM7 amplifier sounds wonderful! The bass is well articulated without being boomy, mid-tones are clear and even, and the highs are crystal clear.


Fostex FE206En in Back-Loaded Horn Speaker Cabinets Fostex FE206En in Back-Loaded Horn Speaker Cabinets - 1 September 2014Australian Flag

Once again Mark tries on the Fostex FE206En high sensitivity fullrange driver, but this time the end result is a large elaborate back-loaded horn loudspeaker. The speaker cabinet plans are from the FE206En driver datasheet. The horn loudspeaker cabinets are made from 21 mm thick pine plywood and use a single FE206En fullrange driver and no crossover. Australian beeswax is used on the outside of the horn cabinet and heavy cedar oil was applied to the mouth of the horn. The sensitivity of the FE206En driver is greater than 96 dB / 1W / 1m, so the rear-loaded horn speakers are very well suited for use with very low power tube amplifiers. Mark reports that the horn speakers can draw an extremely accurate soundstage, sound excellent and have lead to a whole new listening experience with Paris, a 2.5W 6EM7 SET amplifier.






Speaker Projects Gallery - Parts-Express.com - [External Link]

Check out the Parts-Express.com Speaker Projects Gallery for a wide range of DIY Loudspeaker projects. The Speaker Projects Gallery features over 50 DIY speaker projects that have been built by other DIY audio enthusiasts. Each speaker project includes complete drawings to illustrate construction of the speaker enclosure, crossover schematics, a full parts list and photographs of the finished speaker project.

Shown in the photo to the left is the TriTrix MTM TL DIY speaker project. For those who are not great with woodworking, the TriTrix is available as complete kit.



Fostex FE206En Double Bass-Reflex Speakers Fostex FE206En Double Bass-Reflex Speaker Project - 17 September 2012Australian Flag

Mark has put together his second set of the Fostex FE206En double bass-reflex speakers. The speaker box plans are from the datasheet that was supplied with the drivers. The loudspeakers use a single Fostex FE206En fullrange driver and no crossover. The sensitivity of the drivers is about 96 dB / 1W / 1m, so the double bass-reflex speakers are well suited for use with flea and low power tube amps. The two chamber box design extracts good bottom end from these low displacement drivers. The speakers will be used in a home theater so for a non-reflective finish the speaker enclosures are painted with a undercoating paint for a stipple like finish and flat black paint. Mark reports that the speakers are an excellent mate for use with his 2.5W 6EM7 SET amp.


DIY Stepped Attenuator Volume Control DIY Stepped Attenuator Volume Control - 21 June 2012 USA Flag

In this DIY attenuator project Matt uses an inexpensive ladder type stepped attenuator to make a passive stereo volume control. The switched attenuator comes fully assembled and uses 1% precision metal film resistors on a make before break 2-pole (stereo) 24-position switch. Checking noise, Matt found that the stepped attenuator has a noise figure which is about 26dB lower than a PEC hot molded carbon potentiometer of the same value. This attenuator project is simple to build and should save you some money if you are in the market for a passive hi-fi volume control.


DIY Hi-Fi Phono Turntable DIY Hi-Fi Phono Turntable - 26 March 2012 Hungarian Flag

Nandor a very talented DIYer from Hungary has built this fabulous looking Hi-Fi record player. The DIY turntable project uses the platter and the direct drive motor assembly and controls from a Dual 701 record player. The tonearm is built from scratch following a magnetically Stabilized design which means that there are no fixed pivot points or bearings. The turntable plinth is made using stacked layers of plywood. A DIY record weight rounds out this challenging DIY record player project.


DIY Shielded RCA Interconnect Cables DIY Shielded RCA Interconnect Cables - 22 February 2012Germany Flag

Tom has put together an instructional guide to construct simple line-level RCA interconnect cables. The cables use shielded instrument wire and is very simple to construct requiring only some basic soldering skills. The required parts are easy to source and a pair of these shielded RCA cables can be built for as little as $10. Use these simple DIY cables to upgrade your stock and inexpensive interconnects.



DIY 12AU7 / IRF510 Headphone Amplifier DIY 12AU7 (ECC82) / IRF510 Headphone Amplifier - 12 April 2010USA Flag  Low Voltage

Rogers has built an improved version of his popular and simple low voltage 12AU7 / IRF612 Headphone Amplifier (5 Aug 2008). The new version allows novice builders to experience assembling and listening to their own headamp. The headphone amplifier is similar to the previous version in that a single 12AU7 (ECC82) vacuum tube is used for voltage gain and an IRF510 MOSFET follower stage is used to provide current to drive demanding headphones. The hybrid tube and MOSFET amplifier operates off a 12V SLA battery so there are no high voltage concerns. The main difference from the original version is that a LM317 regulator is used as a CCS to bias the MOSFET into class-A operation instead of a load resistor. The project includes PCB image files and can also be built on a protoboard. This simple headphone amp can be built for about $40-50.


Tang Band D4-1 DIY Back Horn Speaker Kit Tang Band D4-1 DIY Back Horn Speaker Kit - 10 March 2010Canadian Flag  KIT

The D4-1 DIY Back Horn Speaker Kit put together by Tang Band is very simple to build, sleek looking and sounds great. The DIY speaker kit comes complete with all the parts and tools required (except for a soldering iron) to build a great looking, little rear loaded single driver horn speaker system. There is no cutting or finishing (painting / staining) required to complete the speaker kit. The small horn speaker kit goes together much like ready-to-assemble furniture. The end result is an attractive and compact horn speaker that sounds great and is fun to build.


DIY 6L6 / 5881 Single-Ended (SE) Tube Amplifier DIY 6L6 / 5881 Single-Ended (SE) Tube Amplifier - 9 February 2010Thai Flag

This fantastic looking tube amplifier was put together by Mr. Chey in Thailand. The DIY enclosure is constructed from aluminum sections and the audio output transformer covers are built using copper clad board. The circuit is very simple, a single-ended output stage using 6L6 or 5881 tubes, driven by 6SJ7 or 6SD7 cutoff pentodes. Mr. Chey is very pleased with the results and has replaced his solid state amp with this beauty. Nice work!


DIY KT88 Push-Pull Monoblock Tube Amp Kit DIY KT88 Push-Pull Monoblock Tube Amp Kit - 30 November 2009Canadian Flag  KIT

A build and review of the Odd Block KT88 Series 1 Tube Amp Kits. The monoblock tube amp kit uses an SRPP input stage with 5751 driver tubes and a push-pull output stage with KT88 power tubes. A constant current source (LM317HVT voltage regulator) is used to force the output stage into class-A operation. A solid state power supply is used. The tube amp kit comes with a nice steel enclosure and the power output is about 25 watts. The amplifier circuit is very simple with minimal parts in the signal path. The result is a very nice sounding tube amplifier kit that performs well.


DIY Low-Inductance Speaker Cables DIY Low-Inductance Speaker Cables - 19 May 2009USA Flag  Recommended

Adam has put together another fine looking set of Do-It-Yourself (DIY) Speaker Cables for his DIY 3-Way Hi-Vi Tower Loudspeakers. The cables are very simple to construct and are comprised of 16 gauge wires that are twisted together in alternating directions. The cable geometry results in a very low-inductance speaker cable with an equivalent wire gauge 10 so insertion losses are also low. High quality gold plated banana plugs, TechFlex and a laser etched decorative Oak Sleeve round off a very nice looking cable that rivals the performance of high quality commercial cable offerings.


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Source: https://diyaudioprojects.com/

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