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ATI

ATI forsterker «American Muscle built by American muscle.

American Muscle
At ATI we make heavy-duty amplifiers with proven circuitry, meticulous assembly and rigorous testing designed to deliver state-of-the-art audio for years– all designed by us and built in our own US factory. It’s a simple story, «American Muscle built by American muscle.»No Shortcuts, No Compromises
We design, engineer, and assemble all ATI products in our 50,000 square foot Southern California factory. Everything is built completely to our specifications and we monitor every aspect of the process ourselves. We’re convinced, that our efforts pay off in dependability and sound quality. Our customers agree.

Here’s the Beef – Toroidal Transformers
At the heart of any amplifier is the power supply. Its foundation is the power transformer. To assure the highest quality, we wind our own. For the transformer’s core we use MOH with magnetic properties that increase efficiency 18% over conventional units. We wind the core two wires at a time, a technique called «bifilar winding» that ensures perfectly symmetrical transformers that maximize efficiency and reduce distortion Each amplifier channel gets not only its own set of transformer windings, but its own rectifier and storage capacitors, thus giving each channel its own separate power supply. Even if the left channel is pushed to the limit by, say, a loud car crash on a movie soundtrack, it does not affect the power available to the other channels.

Enclosures
We house our products in rugged chassis with powder-coated finishes that resist scratches and prevent corrosion. Our hardware is equally durable and rustproof, made from teflon-coated, 18-8 stainless steel. We use inserts instead of threading metal parts, resulting in a stronger unitized chassis.

Heat Sinks
Because we design our amplifiers for the home as well as the rigorous demands of commercial applications, we use substantial heat sinks for each channel. This results in amplifiers that are absolutely quiet and run as cool as possible. The result: there is no noise to mar the listening experience and the amplifier operates more efficiently for a longer life. Those over-size heat sinks eliminate the need for fans that add noise and introduce dust into the amplifier.

Circuit Boards
We use double-sided FR-4 glass epoxy circuit boards in all our products. Not only does a double-sided board handle twice the electrical current of a single-sided board, it produces much more solid connections to the components on the board. The solder joints that secure the components to the board over both surfaces of the board, plus the inside of the hole into which the component leads are inserted. As a result, our circuit boards are practically perfect, with nearly zero failures due to bad connections or cold-solder joints.The components we use on our circuit boards also add to the quality of ATI products. To insure that each and every circuit board functions exactly like the last, all of the gain stages in our products employ high-quality metal-film resistors with 1-percent tolerance.

Wiring
Open most multichannel power amplifiers and you will see a «rat’s nest»-dozens of wires running seemingly haphazard through the chassis. Open an ATI amplifier, though, and you will see a clean layout with wires wrapped neatly in fiberglass cloth tubing originally developed for the aerospace industry. The tubing protects the wire from both heat and accidental damage.

Chassis-Mounted RCA Jacks
The gold-plated RCA input jacks on our amplifiers are mounted directly to the rear panel and not to the circuit board. While this technique complicates assembly, it results in a more robust connection and the jack cannot be accidentally broken off by the tight-gripping RCA plugs used in some audiophile interconnection cables.Trouble-Free Circuit Breakers
Our higher power multi-channel amplifiers use magnetic circuit breakers to protect against AC overloads. If the breaker trips, it’s a simple matter to re-set it. Most amplifiers, however, use fuses for overload protection: if a fuse blows, you must have the proper value available in order to restore power to the amplifier.

Protection Circuits
ATI amplifier employ lightning-fast optically-coupled protection circuits that are completely removed from the signal path so they cannot affect the sound quality. These protection circuits sense electrical «shorts» in speakers or wiring and sense electrical «spikes». If triggered, the circuit instantaneously disengages the output, samples the affected circuitry every 10 seconds and automatically restores proper operation when the fault is corrected. This special feature minimizes the chance of your amplifier going out of service just when you’ve filled your home theater with expectant guests.

ATI - AT 1800 Serien

AT1800 Serien

The AT1800 shares key hallmarks with its larger siblings, the AT2000 and AT3000’s. The AT1800 is available in 6 configurations from the AT1802 2-channel model to the AT1807 7-channel version. Power is conservatively rated at 180 Watts RMS/channel into 8 Ohms from 20Hz to 20kHz with no more than 0.03% THD and I.M. distortion. Each model comes equipped with two toroidal transformers, a detachable IEC power cord, optically coupled protection circuits, soft-start circuit and convection cooling eliminating the need for fans. Units can even be upgraded at the factory to add additional channels (up to 7).

ATI - AT 3000 Serien

ATI - AT 4000 Serien

AT 4000 Morris Kessler Signature Amplifiers

Montebello, CA , October 14, 2015 – Amplifier Technologies, Inc., the prolific manufacturer of many of the high end audio’s best amplifiers today added a new series of amplifiers designed by their president and chief engineer, Morris Kessler. The AT 4000 series amplifiers, available with 2 to 7 channels, share the design philosophy and circuit sophistication of ATI’s award-winning 6000 Series amps with power output reduced to 200W RMS per channel at 8 ohms and 300 W RMS at 4 ohms. Furthermore, their “signature series” designation with a facsimile of Kessler’s signature on the main panel attests the special nature of these amplifiers.

Beyond Kessler’s personal identification, these amplifiers share these key features with the 6000 Series Signature amps.

1. Fully balanced, differential amplifier design with two output stages per channel but with only a single input stage. The advantages of balanced designs are retained and noise is further reduced by 50%.

2. Current feedback instead of the more common voltage feedback. The reason: current feedback amplifiers are faster with virtually unlmited slew rate and are better able to reproduce today’s best music and film.

3. Thermaltrak output devices: Unlike traditional designs where external diodes attached to the heat sink track the amplifiers operating conditions to adjust bias, Thermaltrak devices have the diodes in the same package as the transistors so bias is optimized in real-time.

4. Dual DC servos per channel to control DC offset.

5. Dual toroidal transformers with independent secondary windings. Electrically, each amplifier channel has its own transformer.

All the amplifiers in the AT 4000 series are rated at 200 Watts RMS from 20 Hz to 20 kHz with no more that 0.03% THD at 8 ohms with all channels driven and 300 Watts RMS at 4 ohms under the same conditions. Signal-to-noise ratio is typically 126 dB referenced to full output so each amplifier in the series is capable of playing back the full dynamic range available on today’s lossless recordings.

All ATI amplifiers are available in standard (17”) and rack-mount (19”) chassis with domestic (117V) of Export (220 to 240V) chassis and are covered by ATI’s 7-year transferrable warranty.

About Amplifier Technologies

Amplifier Technologies owns the ATI, Audioaccess, B&K, BGW and Theta Digital brands and designs and manufactures state-of-the-art audio components for its own and other brands in its facility in Montebello, CA. Guided by legendary amplifier designer Morris Kessler, ATI offers both performance and value in audio components.

ATI - AT 6000 Serien

AT 6000 Morris Kessler Signature Amplifiers

AMPLIFIER TECHNOLOGIES, INC INTRODUCES THE MORRIS KESSLER SIGNATURE AMPLIFIERS AVAILABLE WITH TWO TO 7 CHANNELS. THE PURE BALANCE™ DESIGN USES CURRENT FEEDBACK, THERMALTRAK OUTPUT DEVICES AND DC SERVOS FOR IMPROVED PERFORMANCE

Amplifier Technologies, Inc., the prolific manufacturer of many of the high end’s best amplifiers today introduced a new series of amplifiers designed by their president and chief engineer, Morris Kessler. The AT 6000 series amplifiers, available with 2 to 7 channels, are the company’s first new amplifiers in over a decade. Furthermore, their “signature series” designation with a facsimile of Kessler’s signature on the main panel acknowledges the special nature of these designs.

Beyond Kessler’s personal identification, these amplifiers are new in more significant ways.

1. As in Kessler’s previous top-of-the-line designs, these amplifiers are fully balanced, differential amps, but unlike his earlier balanced designs which were essentially balanced bridged amplifiers, the AT 6000 series uses only a single input stage with dual-differential output stages. The reason: the advantages of balanced designs are retained and noise is reduced by 50%.

2. The design uses current feedback instead of the more common voltage feedback. The reason: current feedback amplifiers are faster with virtually unlimited slew rate and are better able to reproduce today’s best music and film sound.

3. Kessler used Thermaltrak output devices for the AT 6000 series. Unlike traditional designs where external diodes or transistors attached to the heat sinks track the amplifiers operating conditions and use the details to adjust bias, Thermaltrak devices have the temperature sensing device in the same package as the output transistor. The results: bias is optimized in real-time.

4. The AT 6000 series use dual DC servos to track and maintain DC offset. The result: DC in the amplifier’s output is reduced to insignificant levels.

5. These amplifiers use a revised PCB layout. They are still modular with the complete amplifier including the power supply parts on a single card, but now the AC components are on one edge of the board and away from the signal input. The result: improved signal-to-noise performance.

6. All of the amplifiers in the series use dual toroidal transformers, dual power switches and dual line cords. The results: the AT6002 is now a complete dual-mono design and the amplifiers with many channels, as in the 7-channel AT6007, can be hooked-up to two independent 20 amp circuits for greater sustained output power than is possible from a single AC circuit.

All the amplifiers in the AT 6000 series are rated at 300 Watts RMS from 20 Hz to 20 kHz with no more that 0.03% THD at 8 ohms with all channels driven and 450 Watts RMS at 4 ohms under the same conditions. Signal-to-noise ratio is typically 128 dB referenced to full output so each amplifier in the series is capable of playing back the full dynamic range available on today’s lossless recordings.

All ATI amplifiers are available in standard (17”) and rack-mount (19”) chassis with domestic (117V) of Export (220 to 240V) chassis and are covered by ATI’s 7-year transferrable warranty.

ATI - Class D amplifiers

AMPLIFIER TECHNOLOGIES, INC. INTRODUCES NEW CLASS “D” AMPLIFIERS USING HYPEX N-CORE OUTPUT MODULES AND IN-HOUSE LINEAR POWER SUPPLIES AT52XNC: 200W RMS PER CHANNEL AT 8 OHMS WITH 2 TO 8 CHANNELS AT54XNC: 500W RMS PER CHANNEL AT 8 OHMS WITH 2 TO 4 CHANNELS