GAIN STAGE

A low noise NE5532 section (A1A) provides 26dB maximum gain. A linear control is used in a unique circuit configuration to provide a wide range logarithmic MASTER gain control characteristic in a variable gain stage with optimum noise performance. Output noise at unity gain is low enough to allow performance to exceed 16-bit digital dynamic range even at -10dBu nominal output. Unity overall gain is achieved at approximately 12 o’clock pot position.

LINE OUTPUT

The balanced output stage of the SUM100 utilizes a unique active balanced output driver IC, the Analog Devices SSM2142, that senses whether the connected load is balanced and floating or is unbalanced due to either side being grounded. A balanced output load will be driven with equal and antiphase levels on the HI and LO output lines.

An unbalanced (one side grounded) load will cause the driver IC to shut off the signal output to the grounded side of the load and double the output level applied to the other side, thus maintaining equal output to either type of load. The output stage provides 6dB gain and will drive loads of 600 ohms and higher. Nominal output is +4dBm with clipping at +22dBm (10Vrms) into 600 ohm balanced loads for 18dB nominal headroom. Maximum output is reduced to +20dBu (7.8Vrms) when driving an unbalanced load since the full output swing of only one driver is available. This still provides a very comfortable 30dB of headroom above the typical -10dBu nominal unbalanced signal.

POWER SUPPLY

The SUM100 requires 22 to 30VDC and are designed to share a common external 24VDC "Wall Wart" type power supply. A pair of loop-thru DC connectors on the rear of each module permits several units to be daisy-chained with P/N20602-1 DC power cables to a single power supply. The WA100-1 and WA100-2 (230VAC) are 400Ma supplies. The SUM100 draws 70mA. Any combination of amplifiers, which add up to less than the supply rating, can be powered by a single supply.

INSTALLATION

UNPACKING

Inspect the equipment. If there is any visible damage to the unit or to the box it came in, contact the factory but do not return anything to ATI without prior authorization and shipping instructions. It may be necessary to have the shipping

Audio Technologies Inc. 154 Cooper Road #902 West Berlin, NJ 08091 Voice 856-719-9900 Fax 856-719-9903 www.audio.com

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Amplifier Tech SUM100 manual Gain Stage, Line Output, Power Supply, Installation Unpacking
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SUM100 specifications

The Amplifier Tech SUM100 is a notable entry in the world of amplifiers, designed to meet the needs of both professional audio engineers and casual music enthusiasts. Renowned for its combination of power, efficiency, and sound fidelity, the SUM100 is making waves in various audio environments, from live performances to studio recordings.

One of the most striking features of the SUM100 is its robust power output. With a rating of 100 watts per channel at 8 ohms, it delivers sufficient power to drive a wide range of speakers, ensuring that the audio output remains clear and dynamic even at high volumes. Its power rating makes it a versatile choice for anyone looking to amplify their sound without compromising quality.

The SUM100 employs advanced Class D technology, which allows for significant energy efficiency without sacrificing audio performance. This technology enables the amplifier to produce minimal heat, meaning it can run for extended periods without the need for complex cooling systems. As a result, the SUM100 is ideal for both studio and live settings where prolonged use can occur.

An essential aspect of the SUM100 is its user-friendly interface, which facilitates easy adjustments and monitoring. The amplifier includes intuitive controls for volume, treble, and bass, allowing users to tailor the audio output to their specific preferences. Additionally, the front panel features LEDs that provide clear status updates, making it easy to understand the amplifier's operational state.

The SUM100 also boasts multiple input options, accommodating various sources such as instruments, microphones, and playback devices. This flexibility makes it a go-to solution for live bands, recording studios, and even home theater setups. The built-in protection circuitry ensures that both the amplifier and connected devices are safeguarded against potential damage from overloads or short circuits.

Moreover, the SUM100 is designed with durability in mind. Its sturdy construction and high-quality components ensure that it can withstand the rigors of frequent use, making it a worthy investment for any audio professional.

In conclusion, the Amplifier Tech SUM100 is a powerful, efficient, and versatile amplifier that stands out in today's audio landscape. With its advanced Class D technology, generous power output, and user-friendly features, it is well-suited for a wide range of applications, from live performances to studio recordings. Whether you are a seasoned audio professional or a passionate music lover, the SUM100 is sure to elevate your listening experience.
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