Denon New Retail Home Theater Series Models: High-Value, High-Performance

Denon’s Retail Home Theater Series line for 2010 provides discriminating consumers with a host of upgraded features and capabilities at affordable prices. The line now features three 7-channel models (AVR-791, AVR-891, AVR-991), as well as two 5-channel models (AVR-591, AVR-391). All five offer many of the same high-quality features and capabilities that distinguish Denon receivers in the marketplace, including some of those found in the company’s CI models. Notably, the AVR-991 features Audyssey DSX with Front Height or Width Channels with Sirius Satellite Radio Ready capability, as well as being the least expensive Denon AVR with advanced networking that adds an RJ-45 Ethernet Port for third-party controllers, Mac/PC audio streaming, Internet Radio, Pandora, Flickr, a Web browser function and more. All models feature 24-bit/192-kHz Analog Devices DACs, and Audyssey Dynamic Volume, Audyssey Dynamic EQ and Audyssey MultEQ. All include analog-to-HDMI video conversion, while AVR-791 and higher feature 12-bit video processing and scaling from Anchor Bay Technologies (ABT).

Bridge Amplifiers Stereo to Mono Double Power Amp Subwoofer

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.

The load impedance can be lowered, but if the load happens to be a pair of standard loudspeakers this is not viable, since the impedance is set by the drivers themselves. Increasing the power supply voltage is generally a bad idea, since most commercial amps do not have a wide safety margin with component ratings, and will probably be destroyed if the voltage were to be raised sufficiently to obtain even 50% more power.

DIY Audio CMoy Headphone Amplifier Circuit Pocket Amp

CMoy is very simple portable headphone amplifier. The amplifier was originally posted by Chu Moy on headwize.com. The best source of information about this amplifier is article How to Build the CMoy Pocket Amplifier. If you use Google, you will find many pages and pictures about CMoy. Few months ago I decided built this amplifier also. In my post you can find my experience with creating this simple but very good amplifier.

Denon AVC-A1HD AV Surround Amplifier 7.1-Channal Power Amplifier

Denon AVC-A1HD AV Surround Amplifier 7.1-Channal Power Amplifier specifications

• THX Ultra2 certified 150W x 7ch power amplifier
• All new circuit layouts that shorten audio and video signal paths for best picture and sound
• Discrete Devices for ultimate performance in each circuit block (D.D.S.C.-HD)
• Dolby TrueHD and DTS-HD Master Audio decoders
• To preserve original sound quality for the room's acoustics at any volume level, Audyssey Dynamic EQ loudness correction technology

Hi-Fi Pre-Amplifier with Bass Treble Tone Control Circuit

The preamp featured is very straightforward to make on the PCB, and has an innovative tone defeat function. Rather than completely disable the tone controls, they are massively de-sensitised, and when "defeated" have a maximum range as shown in below. This can be increased if desired, so you can have two tone control settings, one with the normal 10dB boost and cut, and the other with a very subtle 3dB boost and cut - this will be enough (surprisingly) for very minor adjustments such as you might need for day-to-day listening.

Hum Filter Remove AC Line Noise Pre Amp Circuit for Hi-Fi Amplifier Audio Systems

That hum noise is produced by electronic device with improper design, yes you’re right. And you might choose to solve the trouble maker, the source. You begin to check the grounding, the cabling, casing, and many more things you can do to eliminate the hum heard from your amplifier.

You might put yourself into a trouble if the hum can’t be eliminated and you don’t realize that the source is not come from your equipment that you have the access to fix it. For the source come from mp3 player powered by you AC to DC adapter, you might check for the ripple from your power adapter and fix it by adding a good regulator.