Hafler IRIS manual EPL Tape Loop Systems

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The EPL and

Tape Loop

Systems

The actual audio attenuation elements are passive optically- controlled resistors, arranged in a special CYBER-OPTIC control circuit (patent applications in progress) which allows a combination of very low distortion and stereo tracking accuracy (typically 0.1dB) not previously possible in a passive, continu- ous control system.

The BALANCE control produces approximately 13dB maxi- mum cut in one channel, while boosting the other channel by 3dB-to maintain constant music power during control panning.

This simplified signal flow diagram can be very helpful in understanding the discussion of the EPL and TAPE loops.

In IRIS, the EPL output jacks and RECORD output jacks are activated only when the related panel switch is engaged. This completely disconnects the inputs of unpowered accessories- often a cause of distortion. These buffer-fed jacks have 2.15k ohms output impedance.

The EPL (External-Processing-Loop) system consists of the EPL switch and the EPL output and EPL input jacks. When the EPL switch is engaged, you may use the EPL outputs to feed into an external accessory, and receive its returning output on the EPL input jacks. You can alternatively employ the EPL input jacks as an 8th HIGH Level input.

The tape system on IRIS comprises two pairs of TAPE input jacks, two pairs of RECORD output jacks and six related control switches.

Note that the TAPE input jacks are selectable either by the input selector KEYS, or by the tape MONITOR switches. These jacks receive the OUTPUTS of tape decks.

For PLAYING tapes you will likely prefer to use the tape KEYS for selection-particularly as these functions are accessible from the IRIS remote.

The four round buttons associated with tape functions are not needed for normal tape playback.

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Contents Hafler Iris Preamplifier Introduction Table of ContentsInstallation Phono Power ConnectionsSelection Input ConnectionsPage Operation Volume/ Balance SystemMuting System EPL Tape Loop Systems Iris Functional Block Diagram ONE Channel Shown KEY 1 if Recording SystemTape Monitoring Switches Balance V/B Command Transmissions VolumeAutomatic Transfer Control Remote V/B Resolution Record Security Umbilical Systems Sx Serial eXternal KEY Battery ReplacementInstructions Optional Cartridge LoadingImproper cartridge frequency-response Iris Specifications RMS Factory Service and Limited Warranty

IRIS specifications

The Hafler IRIS is a noteworthy advancement in the realm of audio technology, particularly designed for audiophiles and sound engineers seeking high fidelity listening experiences. This speaker system epitomizes the confluence of innovative design and high-performance engineering, making it a favored choice among sound enthusiasts.

One of the standout features of the Hafler IRIS is its utilization of advanced crossover technology. The IRIS employs a meticulously designed passive crossover network that ensures a seamless transition between different frequency ranges. This technology allows for crisp highs, detailed mids, and powerful lows, creating a well-balanced sound profile that can accurately reproduce even the most complex audio tracks.

The speaker design incorporates a unique enclosure that minimizes distortion and enhances acoustic performance. This sturdy construction not only mitigates unwanted vibrations but also provides an optimal acoustic environment for sound reproduction. The IRIS is crafted with high-quality materials, including dense MDF (Medium Density Fiberboard), which further contributes to its robust build and resonance-free performance.

Another significant characteristic of the Hafler IRIS is its driver configuration. The system typically includes a high-performance woofer, midrange, and tweeter, each meticulously selected to ensure compatibility and performance consistency. The woofer is designed to deliver deep bass response, while the midrange driver excels in delivering vocals and instrumental clarity. The tweeter is engineered to reproduce high frequencies with precision, ensuring that every note resonates with clarity.

Hafler has also integrated innovative technologies to enhance user experience. With features like bi-wiring capability, audiophiles can connect their amplifiers directly to the woofer and tweeter separately, allowing for improved control over each driver’s performance. This flexibility enables users to tailor their listening experiences to meet personal preferences and requirements.

Furthermore, the Hafler IRIS is designed to fit seamlessly into a variety of audio setups, whether in professional studios or home listening environments. Its sleek aesthetic allows it to complement modern décor, making it an attractive addition to any space.

Overall, the Hafler IRIS delivers a compelling mix of design, technology, and sound quality, making it a preferred choice for those who seek a sophisticated listening experience. Its commitment to high performance and user-centric design principles ensures that it stands out in the competitive landscape of audio technology.
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