ART DTI Hum Eliminator
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Manufacturer: ART
Product SKU: ARTDTI
The DTI (Dual Transformer/Isolater) is a high-quality, totally passive audio interface that uses a pair of high-performance transformers to totally separate input and output signal grounds, thereby isolating two systems and reducing hum and ground-loop noise. The DTI's audio transformers have an extremely flat and wide frequency response and can handle high signal levels while maintaining an isolated balanced output.
Price: $70.00
Sale Price: $49.95
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Product Review:
The only thing I'd change would be to improve its physical stability. It's tiny footprint means that it overbalances easily, and falls off amps, tables, etc.; I usually just tape it in place.