| No. |
Power Amplifiers & Accessories |
Description |
Flags |
| 03 | 60W / 8 Ohm Power Amplifier |
My old faithful power amp design - For the latest (and much better version), see Project 3A |
07Dec
 |
| 10 | 20 Watt Class-A Power amp |
True Class-A power amp for low power systems or tri-amping |
20Feb |
| 12 | Simple Current F/B Amp |
An update of a very old 60W / 8 Ohm design (formerly incorrectly referred to as 'El-Cheapo' |
12Apr |
| 12a | El-Cheapo |
This is the real El-Cheapo - presented more or less as originally published (1964). 30W / 8 Ohm design |
12Apr |
| 19 | Single Chip 50W Power Amplifier |
Using the National Semiconductor LM3876 Power IC. |
|
| 23 | Power Amp Clipping Indicator |
A fast and accurate indicator to show an amp is clipping (Updated) |
05May |
| 33 | Loudspeaker Protection & Muting |
Protect speakers from turn-on and turn-off transients and amplifier faults. (See important updates to this project)
| 22Jan
|
| 36 | Death Of Zen (DoZ) |
An ultra simple, high performance Class-A power amp. A lot of people have now built this amp, and all seem very pleased. Revision-A boards are now available. |
2005
|
| 3A | 60-100W Hi-Fi Power Amp |
Updated version of Project 03. Capable of up to 100W into 4 or 8 ohms (with different supply voltages), this amp should satisfy nearly everyone. It has excellent performance, is easy to build, and is a very solid and reliable amplifier. One of the most popular ESP projects. |
30Jul
|
| 3B | 25W Class-A Hi-Fi Power Amp |
A modified/updated version of Project 3A. Capable of around 25W into 8 ohms, this amp should satisfy those who prefer the idea of a Class-A approach to audio. |
23Jan
|
| 53 | Output Power Limiter |
Just the thing for hire equipment, or if you want to limit the amplifier power to stop the kids from blowing up your speakers. A simple limiter that can be set to the required power with a trimpot, and no amount of overdrive will exceed the preset power limit. |
|
| 56 | Variable Impedance |
The DoZ project promised the ability to vary the output impedance of the amp, but this is applicable to any amplifier. Here are the details. Is it trivial - NO! Is it worth the effort? ABSOLUTELY. You will never know the possible benefits (or otherwise) until you try it. |
22Apr |
| 61 | 55W Hi-Fi Power Amplifier |
This design is now retired at the author's request |
25Oct |
| 68 | 300W 500W Subwoofer Amplifier |
By far the biggest (serious) power amp I have published, this amp is designed especially for subwoofers, and is ideally suited for electronically equalised systems. Updated - Now up to 500W! |
07Jan
|
| 72 | 20W/Ch Stereo IC amplifier |
Based on the versatile LM1875 from National Semiconductor, this amp is ideal for PC speakers, surround sound, or tweeter amps in triamped systems. |
13Jan
|
| 76 | Opamp Based Power Amplifier |
This is a contributed project, and has some interest value - especially as a learning exercise. It is simple to build, and will make a good first project. |
17Aug |
| 83 | MOSFET Follower Power Amplifier |
Another contributed project that will be of great interest to those who value simplicity and good performance. Like Project 76, it is simple to build, and will make an excellent first project. |
16Nov |
| 101 | MOSFET Power Amp |
This MOSFET power amp has the highest performance of any similar design I have tested, with vanishingly low distortion and wide bandwidth. It is also simpler than most, but lacks nothing as a result. |
01Feb
|
| 111 | PIC Based Speaker Protection |
While P33 has been a very popular project, it does have some limitations. This new version is more versatile, and provides many additional functions. It is of academic interest only at this stage, but PCBs will be made available if there is sufficient interest. |
10Oct
|
| 114 | Class-D Amplifier |
Complete details for building a stereo (or even a multi-channel) amp or subwoofer amp, using the new ColdAmp BP4078 Class-D amplifier modules. These modules are available from ESP. |
20Dec
|
| 115 | GainClone Amplifier |
This article is in two parts, and describes with photos and drawings how to build a very nice looking GainClone chassis. Using the P19 and (optionally) P88 +P05 boards. Depending upon demand, the chassis may be made available as a product. |
01Feb
|
| 116 | Class-D Subwoofer amp |
This describes a complete 'plate' amplifier for subwoofers. Using the P84 equaliser, and either P48 or P71 sub-resonance sub controller. Power is from a ColdAmp BP4078 Class-D amplifier module. These modules (and all PCBs) are available from ESP. Article includes all chassis details. |
Feb06
|
| 117 | 1.5kW Power Amp |
Insanity! This project is designed specifically for those who think that one can never have too much power. Hopefully, after reading this, the constant requests for more power will stop. It is capable of destroying any loudspeaker connected to it, regardless of claimed power rating. |
Apr06 |
| 120 | Crowbar Protection |
A crowbar loudspeaker protection circuit is the last resort, but if it saves an expensive loudspeaker it will have paid for itself many times over. |
Jun07 |
| 127 | TDA7293 Power Amp |
A simple to build dual channel power amp, using the TDA7293 Power Opamp ICs. The board for this is very small, making it easy to fit into tight spaces if necessary. |
Nov09 |
Update Information: 20 Mar 2002 - modified page layout./ 12 Apr 05 - added real El-Cheapo details./ 03 Sep 05 - P36 Rev-A./ 20 Dec 05 - P114./ June 07 - P120
