High Level

Inputs

(Oval Key

selected)

Main Outputs and Mono switch

The usual ground thumbscrew is provided for turntable-frame grounding via the extra ground wire provided on most turn- tables.

IRIS has seven pairs of main HIGH LEVEL inputs, selected by the seven (oval) KEYS to the right of the phono KEY. All of these inputs proceed at unity gain to the attenuator/line-amplifier system, which has a maximum gain of 20dB.

All of these basically identical inputs are selectable by the input KEY switches. The KEY switches activate a digital system which effects audio-signal selection by FET switches, followed by matched J-FET buffers.

Excepting phono, all input impedances, for the entire preampli- fier, are in the 15-28k ohms range.

To get you to the basic operation of IRIS as quickly as possible, we have deferred the discussion of EPL and TAPE loops to a later section.

The MAIN output jacks are used to feed the power amplifier. Their low output impedance of 316 ohms allows driving long cables if necessary.

The MONO switch effects a passive combining of the stereo channels into monaural, fed through the attenuator system to both line amplifiers. Although rarely used today, this switch is provided for the optimum reproduction of treasured mono recordings, and can be employed to check for exact system balance.

It is highly recommended that where you may have a constant monaural source, such as a mono TV, that you secure a “Y” splitter from an electronics store and feed both preamp chan- nels in parallel. This makes remote operation easier, and avoids accidentally leaving MONO engaged when you switch back to a stereo source.

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Hafler IRIS manual

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.