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From low to high power and tube based audio amplifier

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A Passive Preamp Switchbox for the Desktop

A Passive Preamp Switchbox for the Desktop

One of the more frequently requested projects on HeadWize has been a switchbox for selecting multiple audio inputs.

http://headwize.com/projects/showfile.php?file=cmoy7_prj.htm

A Compact 50W Integrated Amplifier with Meier Headphone Section

A Compact 50W Integrated Amplifier with Meier Headphone Section

My reason for constructing this project was to develop a design for a compact integrated stereo amplifier suitable for use by a poor (but sound quality conscious!) student living in a university or college dorm.

http://headwize.com/projects/showfile.php?file=harrison2_prj.htm

Designing A Limiter For Headphone Amplifiers

Designing A Limiter For Headphone Amplifiers

When used with headphones - especially personal monitors, audio limiters (also called clippers) can help maintain safe listening levels. Without a limiter, large transients in audio signals could generate dangerous SPLs in headphones, although the average volume might be set at an acceptable level.

http://headwize.com/projects/showfile.php?file=limiter_prj.htm

Using A Headphone Console As A Balanced Line Distribution Amplifier

Using A Headphone Console As A Balanced Line Distribution Amplifier

The Model HC 6 Headphone Console is a six channel headphone amplifier, consisting of six stereo amplifiers, two master stereo inputs and six individual stereo inputs. The two master stereo inputs feed a separate left and right bus to each of the six headphone amps.

http://headwize.com/projects/showfile.php?file=balance_prj.htm

High Quality Audio Mixer

High Quality Audio Mixer

This project is probably the most ambitious so far, and can be expected to be very expensive. On the positive side, it is also capable of excellent performance, and can be tailored to suit your exact specifications. There are several different input modules in the series, the first being the microphone and line input.

http://sound.westhost.com/project30.htm

Subtleties count in wide-dynamic-range analog interfaces

Subtleties count in wide-dynamic-range analog interfaces

Transporting high-dynamic-range analog signals from one piece of equipment to another is not a trivial task. Even subtle design variations can make huge differences in the equipment's ability to reject interference from the ac power line and other sources when the equipment connects to a real-world system.

http://www.edn.com/archives/1998/060498/12df_03.htm

JT-11-BM High Level High Current Differential Output Stage with DC Servo

JT-11-BM High Level High Current Differential Output Stage with DC Servo

JT-11-BM High Level High Current Differential Output Stage with DC Servo.

http://www.jensen-transformers.com/as/as031.pdf

Single capacitor powers audio mixer

Single capacitor powers audio mixer

Micropower and low-voltage op amps allow you to build high-performance analog-signal processors that require no batteries or wall transformers. Instead, you can use a capacitor as a power source.

http://www.edn.com/archives/1997/031497/06DI_04.htm

Point to Point Versus PCB Amps

Point to Point Versus PCB Amps

Most PCB amps that have been produced have been poorer than tube amps, for reasons having nothing to do with the PCB. Like plastic bobbins in transformers, this does nothing to change the tone. The other poor practices that go with a cost-cutting attitude that were introduced at the same time may, but PCBs are unfairly indicted.

http://www.geofex.com/Article_Folders/pt-to-pt/pt-to-pt.htm

Bridging Adapter For Power Amplifiers

Bridging Adapter For Power Amplifiers

A stereo power amplifier is limited in its output power by two main factors - the impedance of the load and the internal power supply voltage. To obtain more power, one has very limited choices - other than the purchase of a more powerful amp.

http://sound.westhost.com/project14.htm


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