The JVC 4VN-990 Integrated 4 Channel Quadraphonic Amplifier, a vintage gem, is recognized for its prowess in handling quadraphonic audio signals. Its strong points include a robust power output, delivering approximately 60 watts per channel, providing ample power for quadraphonic sound reproduction. Designed for the quadraphonic era, it supports four-channel audio, delivering a spatial and immersive listening experience. Featuring comprehensive controls for balance, tone, and channel adjustments, it allows users to tailor the sound to their preferences. Equipped with a variety of inputs, including a phono stage, it offers flexibility for connecting different audio sources. Regarded for its capability to decode and amplify quadraphonic signals, the 4VN-990 stands as a testament to JVC's commitment to audio innovation during the quadraphonic era. Only one of the 4 VU meter light up. The other 3 lights will be fixed before the amplifier is send out. Beside that the amplifier is in very good condition. The front looks great with minimal usage marks, the sides got some scratches tough.  . Featuring a fully discrete component power amplifier design, a patented 4-channel joystick-style remote control, and patented OCL circuitry ensuring the safety of both your speakers and valuable output transistors, this unit boasts top-notch engineering. The front end is governed by a patented sound effects amplifier, meticulously designed for optimal sound enhancement. It offers versatile functionality, serving as both a 4-channel power amplifier and a pre-amplifier to cater to various audio setups. Specifications: Power output: 88W/ch into 8? (stereo), 35W/ch into 8? (quadraphonic) Frequency response: 10Hz to 50kHz Total harmonic distortion: 0.5% Damping factor: 50 Input sensitivity: 2.5mV (MM), 250mV (DIN), 150mV (line) Signal to noise ratio: 65dB (MM), 75dB (line) Output: 200mV (line), 30mV (DIN) Speaker load impedance: 4? to 16? Dimensions: 13 x 42x 39 Weight: 16 kg Voltage: 220V Working condition: Fully Working (See pictures for the cosmetic condition of this lot) Missing or damages: medium Usage Marks  -We ship worldwide. ''We offer combine shipping (EU 30KG max, NON EU 20KG max) for all our listings, ask us for details''   -Shipping in the EU up to 30 KG (max) -Shipping outside of the EU up to 20 KG (max) Picking up the item is also possible. It can either be picked up in Alkmaar or Soest on appointment  Delivery is also possible in some cases. Please reach out to us for more information about deliveries

This circuit is the audio amplifier circuit has a very all the rage single.This is a down-to-earth circuit. miniature pieces of equipment. ...

This is Amplifier circuit diagram using TDA7377. this circuit for 60 watts. right side is 30 watts and left side is 30 watts.

Find out how to build a great sounding audio amplifier (with bass boost) from the LM386 IC, and learn what makes this amplifier sound better than the rest.

We discuss the different audio amplifier classes, going over the real meanings behind Class A, B, A/B, G, H, and D and the pros and cons of each design. Which amplifier is best? Read on.

Product highlights: converts a digital audio signal to analog stereo for connection to an amplifier with analog inputs only supports devices with Toslink optical or coaxial digital outputs, like streaming media players supports PCM stereo and multi-channel digital audio signals supports audio resolutions up to 24-bit/96kHz provides noise-free signal transmission front-panel switch for toggling between optical and coaxial digital sources compact design makes for an easy installation 5V DC power supply included warranty: 1 year 60-day returns MFR # CS-DAC2 Item # 120CSDAC2 California customers: Please click here for your Proposition 65 WARNING.

The RA180 is a state-of-the-art integrated amplifier using the latest innovative technologies. Power damping and dead times were reduced to 1/10 or less. Linearity was dramatically improved to create a near-perfect sound that transcends the boundaries between digital and analog. Enjoy the pure sound of nature provided by the RA180. New Concept Class AD AmplifierThe amplifier has developed from Class A to AB to Class d. Class AB was developed to improve the high hear generation and low efficiency of A. Class D has higher efficiency and higher output than AB, and also significantly improved S/N and THD characteristics compared to A and AB. However, the sound quality has been evaluated as inferior to A/AB due to the limitations of the digital circuit.The GaN class AD amplifier developed by HiFi ROSE has dramatically improved the problems of the existing Class D by applying innovative new materials. Class AD AmplifierClass D amplifiers have a topology that theoretically provides a perfect linear output at 0% distortion and 100% power efficiency. In order to achiece this, the switching action requires high speed and accuracy. However, previous products were weak compated to Class A/AB in the linearity aspect due to the limitations of silicon FET, which had couldn't produce a smooth and natural sound. In the RA180, a new material, GaN FET, was used instead of Silicon FET to solve this problem. The dead time was dramatically improved to 1/10 or less, and a nearly perfect linear output was realized with a switching speed close to zero. this linearity goes beyond the Class D limits and produces a smooth and natural sound, like an analog amplifier. FEATURES Class AD Amplifier with next generation GaN FET Multi Output Component Designed to play up to the Super Twitter Realm Balanced Power Supply PHONO Amplifier with Variable EQ TECHNICAL SPECS Amplifer Output 4Ω: 200W x 4ch 8Ω: 200W x 4ch BTL Mode On: 400W x 2ch Input Sensitivity Balance Input: 2,000mV Unbalance (line 1,2,3) Input: 1,000mV Phono (MM/MC) Input: 5mV/0.5mV Impedance Input Balance Input: 44kΩ Unbalance (Line 1,2,3): 47kΩ Phono (MM/MC) Input: 47kΩ Bandwidth Speaker Output: 10Hz ~ 100kHz H/F Speaker Output: 10Hz ~ 100kHz Frequency Respond Speaker Output: 10Hz ~ 100kHz H/F Speaker Output: 10Hz ~ 100kHz THD Measure Balance & Unbalance (Line 1,2,3) Input: 0.006% (50W) Damping Factor Speaker & F/H Speaker Output: >150 Signal to Noise Ration Measure(S/N) Balanced, Unbalances / Phono MM: 108dB / 106dB / 79dB(MM) Impedance Output Speaker Output: 53mΩ Subsonic Filter with On/Off Switch -3db: 50Hz Tone Control with On/Off Switch Bass(100Hz) / Treble(10kHz): ±15dB Size: 430 X 350 X 110mm (Including feet: 430 X 391 X 130mm) Weight: 37lbs Power Power: SMPS 800W Voltage: AC100-240V, 50/60Hz

The AudioAmp 4 Click Board™ is a low-power audio amplifier with digital volume control. It is equipped with the LM4860, an audio amplifier IC capable of delivering up to 1W of continuous power to an 8Ω load. Available from Debug Store UK.

Mono high power amplifier circuit is actually powerful, output about 1400 W , but if this high power amplifier circuit is doubled and yo...

When designing the V3 Two-Channel Integrated Amplifier, Fosi Audio tried something a bit different than most Amazon brands, they asked some...

From Feliks Audio, a company in Poland, and HIFIMAN, a company in China, comes a combination made in heaven: the Feliks Audio Envy 300B Tube Headphone Amplifier and HIFIMAN Susvara Planar Magnetic Headphones. The combination will set you back $14,000, and you get what you pay for: a very, very unique sound. Although they have […]

The polar response will reveal the sound directivity. No matter how good the design is, speaker lobing will be present to some degree.

This solar tracking system starts following the sun right from dawn, throughout the day till evening, and starts all over again from the dawn next day.

Audio Amplifier Circuit Using Mosfet Transistor: How to make an audio amplifier using just one mosfet transistor An audio power amplifier (or power amp) is an electronic amplifier that strengthens low-power, inaudible electronic audio signals such as the signal from radio receiver or electric gui…

After pictures of my Electro-Voice EV Fours and crossover.

ST-S730ES Tuner (1988) TA-E80ES Preamplifer (1991) DTC-87ES DAT Deck (1991) CDP-X77ES CD Player (1990) TC-K950ES Cassette Deck (1990) TA-N80ES Power Amplifier (1991)

This is the circuit diagram of 2000W class AB power amplifier uses 7 pairs MJ15003 and MJ15004 transistors for the final amplification block. The circuit operated with 90V DC symmetrical (dual pola…

This audio limiter circuit is easy to build, works with BA741 8pins or 4pins so pay attention and uses a symmetrical power supply. When the audio input

Merk Yamaha di Indonesia yang terkenal adalah Motor dan Audio. Rahasia audio Yamaha terletak pada skema schema Tone Control nya

IWISTAO 6N4 Vacuum Tube Preamplifier Finished Board Maratz 7 Circuit 12AX7 pure tube preamplifier finished board and adopts tube 6z4 as rectification,

A collection of odd and fascinating stuff to check out.

Natural moveable amplifier made from ceramic for smartphone. The curvy form permits the Saxo-phone to amplify the sound output from the audio system of the smartphone. Handcrafted in Italy of glazed ceramic, along with amplify the music with simply the acoustic properties of the fabric and type, in an unique method adorn the area. Made …

After six years from the introduction of the first grandiose Aida, Sonus faber pushes the envelope and presents the new Aida, the brand’s flagship speaker poised at the pinnacle of its product range. OVERVIEW At a first glance, there’s no difference when comparing the Aida II to the 2011 edition. Instead, the 6 years separating the two editions are evident in some important stylistic choices: above all, the introduction of the Wenge wood finish, so indiscriminately appreciated by the high end and home decor lovers, treated according to the highest tradition of Sonus faber, with maple wood inlay and our signature hand polishing process. Don’t let the familiar face fool you, however! The new Aida has been completely overhauled utilizing the most advanced electroacoustic developments, even if the outer appearance is relatively unaltered, with all its timeless class and elegance. THE VOICE OF SONUS FABER New combination of tweeter and midrange creates the “Voice of Sonus faber,” the iconic configuration of driver technology capable of maintaining the effortless, warm, and involving timbre that has become Sonus faber's trademark. This is thanks to the 28 mm tweeter with silk dome and “Arrow Point” DAD (Damped Apex Dome, the dampening system to avoid counter phase vibrations of the dome) as well as the midrange with cellulose pulp cone and Neodymium motor system. STEALTH ULTRAFLEX SYSTEM Patented system that allows a big reduction of the THD (Total Harmonic Distortion) and a better bass extension while minimizing distortion and eliminating spurious vibration coming from the air passage inside the reflex duct. Aida Stealth Ultraflex system has a high ratio between width and height and allows reducing the dimensions of acoustic chambers. TUNED MASS DAMPER The TMD (Tuned Mass Damper) is a device normally used in the world's biggest skyscrapers and consists of suspended masses placed inside of the speakers. While vibrating in antiphase, the TMD erases main vibrations and allows a clearer bass reproduction and a better silence reproduction. ZERO VIBRATION TRANSMISSION The purpose of this technology is decoupling the loudspeaker system from the ground, avoiding spurious vibrations from spreading in the listening environment. Springs and elastomers are placed on the base; their decoupling compliance is carefully calculated by the weight of the speaker and allows a more powerful performance of the down firing infrawoofer and a perfect tuning of the entire loudspeaker system. FEATURES SYSTEM “3 and 2/3” way, “Sound field Shaper technology”, “Zero Vibration Transmission” technology, para-aperiodic vented box “Stealth Ultraflex” system and staggered low frequency floor standing loudspeaker system. TWEETER Sonus faber “Arrow Point” DAD (Damped Apex Dome, synthesis of the classic dome and ring transducer) H28 XTR-04. A Sonus faber designed 28 mm moving coil driver, with Sonus faber’s vibration optimized mechanical interface. The ultra-dynamic linearity is given by the Neodymium motor system. Implemented with a natural wood acoustic labyrinth rear chamber, a mechanical anti-resonator designed for this application. MIDRANGE Sonus faber M18 XTR-04. A Sonus faber designed 180 mm Neodymium magnet system ultra-dynamic linearity midrange. CCAW wire is used on a composite former “eddy current free” voice coil. The dynamically linear magnetic field motor incorporates triple Kellog/Goeller rings. A special custom diaphragm is made with a real-time air dried non-pressed blend of traditional cellulose pulp, Kapok, Kenaf and other natural fibers, developed according to the most natural sound. To further inhibit any residual cone coloration, we are using a transparent viscous surface damping coating. The basket is thoroughly optimized to eliminate any resonance, fully CNC machined from solid billets of Avional and Gunmetal. The combination of the two different metals allows eliminating any mutual resonance. The same way as the tweeter, the midrange is decoupled from the main baffle board and designed synergistically with its optimized “acoustic chamber”. A special coaxial anti-compressor is used, designed to remove cavity resonances and distortions. WOOFERS Sonus faber W22XTR-12. A pair of Sonus faber designed 220 mm Neodymium magnet system woofers, lightweight “sandwich” cone structure (high-tech syntactic foam core and two external surface skins of cellulose pulp) woofers. Each of them is integrated in its own acoustically amorphous “stealth reflex” chamber. Designed to blend perfectly with the special midrange and, at the same time, to have absolute definition in their range: the sandwich structure with outer paper pulp skins has the same sonic character of the midrange cone. A powerful long stroke motor system with a 2” controlled “eddy current” voice coil is implemented for high speed, performance and linearity. INFRA WOOFER Sonus faber SW32XTR-08. A Sonus faber designed 320 mm Neodymium magnet system infra woofer, sandwich cone structure with high-tech syntactic foam core and two external surface skins in Nano Carbon Fiber for maximum rigidity and light weight. An impressive 4” voice-coil, inside and outside winding design to take advantage of the magnet field strength and to control the Lorentz currents proportionally to the excursion obtaining this way the tightest available lows. To perfectly match the low-end performance to different listening rooms it is possible to adapt the SPL of the infra woofer. SOUND FIELD SHAPER The patented “Sound field Shaper” technology, allows the control of the direct/reverberant radiation ratio of the Aida. The sound field shaping module can be SPL optimized. SOUND FIELD SHAPER TWEETER Sonus faber “Arrow Point” DAD 29XTR2. A Sonus faber designed 29 mm moving coil driver. The ultra-dynamic linearity is given by the new Neodymium motor system. SOUND FIELD SHAPER MIDRANGE Sonus faber M8XTR. A pair of Sonus faber designed 80 mm ultra-dynamic linearity midrange. CCAW wire is used on a controlled “eddy current free” voice coil. The dynamically linear magnetic field motor has focused field geometry. A special custom diaphragm is made with a blend of traditional cellulose pulp, Kapok, Kenaf and other natural fibers. A special coaxial anti-compressor is used, designed to remove cavity resonance and distortions. CROSSOVER Non-resonant crossover, optimized amplitude/phase response for optimal space/time performance. “Paracross topology” for maximum transparency. The impedance at low frequencies is controlled for a clear and friendly amplifier performance. Double staggered transfer function low frequency/room interface optimized filter. Highest quality is used in terms of the components: last generation Mundorf Supreme Evo, Aluminium Oil and Silver/Gold/Oil capacitors, Mundorf Supreme resistors and Jantzen Cross-coils inductors. Cross-over frequencies: 55Hz - 150 Hz - 200Hz - 3000. SPECIFICATIONS FREQUENCY RESPONSE: 18 Hz – 35.000 Hz, Stealth Ultraflex included. SENSITIVITY: 92 db SPL (2.83V/1 m). NOMINAL IMPEDANCE: 4 ohm. POWER HANDLING: 100W – 1KW, without clipping. DIMENSIONS: 1725mm x 482mm x 780mm (HxWxD). WEIGHT: 330 Kg per pair – net weight / 550 Kg per pair - est. shipping weight

Introduce an FM radio receiver to your design by using the FM Click Board™! This add-on board is a complete FM radio tuner that employs a Si4703 IC. It also features two LM4864 audio amplifiers and an onboard 3.5mm audio connector. Available from Debug Store UK.

Here is a simple AF amplifier project based on 77 TBA820M IC. which can deliver 2W output power with 8 ohm speaker using a 12V power supply.

The Blomley amplifier was designed over forty years ago, is an alternative power amplifier design that suffers virtually no distortion, and provides a sound which has the presence often lacking in conventional amplifiers.

High quality fully assembled CMOY headphone amplifier kit. This amplifier is constructed with only high quality components. Not all cmoy kits are created equal, others use cheap low quality parts and circuit boards. Alps volume control with built in switch, Japanese made, very high quality TI TLE2426 rail splitter virtual ground for stable performance even …

How to Use an Audio Mixer (soundboard): In this instructable I am going to go through all the control features found on most mixers (mixing consoles, mixing desks, audio consoles, soundboards - they all refer to the same thing). I will start with the absolute basics: What is a mixer? A mi…