Input B-2 on the Monitor switch uses only the non-inverted signal. Therefore, if you are feeding a balanced signal into B-2, there will be a 6 dB difference in level between B-2 on the Select switch and on the Monitor switch. The level on the Select switch will be the higher one.

Note: Be careful not to create a feedback loop between the KBLan tape recorder. This can happen by selecting the tape recorder output on the Select switch and having the tape recorder set on "source". This set-up takes the output of the tape recorder to the KBL, through the Record output, back to the tape recorder inputs, and out the tape recorder outputs to the KBLagain. Whendoing Tape/Source comparisons always use the Monitor switch for the tape recorder output and do the Tape/Source switching on the tape recorder.

Use the Gain switch to adjust the overall gain of the KBL. The Low

position is 9 dB of gain; the High position is 15 dB. The LEDindicator is illuminated whenthe switch is in the High position. The switch can be changed during listening at low and moderate listening levels. During high level listening it is advisable to lower the volumebefore adjusting the switch.

Use the Phase switch to reverse the absolute phase of the Main outputs. The switch is functional for both the single-ended and balanced outputs. The LEDindicator is illuminated when the switch is set for phase reversal.

Whentwo KBLsare used, the Phase switch on one KBLcan be used to reverse the phase of one channel in relation to the other.

Many recordings have had their overall phase reversed during the various processing stages. When the absolute phase and phase relationship between channels is correct there are improved transients and dynamic detail.

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1. One KBLOueratin~ in StereQ

Whena single KBLis used for stereo operation the function of the Symmetrycontrol is like a conventional balance control. Use it to adjust for small level differences between channels. There are four 1 dB steps of attenuation and an Off position for each channel.

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Krell Industries KPA, KBL owner manual
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KBL, KPA specifications

Krell Industries, a name synonymous with high-fidelity audio, has made significant strides in the high-end audio equipment market with its KPA and KBL models. These amplifiers epitomize Krell's commitment to exceptional sound quality, advanced technologies, and innovative design, catering to audiophiles who seek unparalleled listening experiences.

The Krell KPA, a cutting-edge power amplifier, showcases Krell’s renowned high-performance design. One of its standout features is the use of an ultra-linear, class-A amplification topology. This design principle not only enhances audio fidelity but also ensures lower distortion levels, allowing music to be reproduced with incredible detail and clarity. The KPA is also engineered to deliver substantial power output, with sufficient reserves to drive even the most demanding speaker loads, making it an ideal choice for dynamic music genres.

Another noteworthy aspect of the KPA is its sophisticated thermal management system. The use of oversized heatsinks and intelligent fan control keeps the amplifier cool during extended listening sessions, thereby preserving performance and longevity. The KPA also includes advanced connectivity options, including RCA and XLR inputs, which cater to a variety of system configurations, ensuring versatility in integration with other high-end audio components.

Conversely, the Krell KBL, a preamplifier model, is designed to complement the power capabilities of the KPA. The KBL's main features include a fully balanced design and multiple gain stages that contribute to its exceptional signal-to-noise ratio. This ensures that the audio signal remains pristine, free from interference and distortion, resulting in a true-to-life reproduction of recordings. The preamplifier also offers an impressive array of inputs, including analog and digital options, allowing users flexibility in their source selection.

Both the KPA and KBL incorporate Krell's proprietary technologies, such as the Cast™ technology, which facilitates a three-dimensional soundstage and unrivaled musical character. This technology seamlessly enhances the relationship between components, creating a cohesive sound that many audiophiles strive for. Furthermore, the build quality of both models is exceptional, with premium materials and craftsmanship that reflect Krell's dedication to performance and aesthetics.

In summary, Krell Industries' KPA and KBL models combine innovative technologies, remarkable power, and unmatched audio quality, making them ideal choices for serious music lovers. Their features, performance, and elegant design showcase Krell's unwavering commitment to the pursuit of audio excellence, setting new standards in the high-end audio luxury market.
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