Specifications

Inputs

3CAST via 4-pin bayonet connectors

3balanced via XLR connectors

4single-ended via RCA connectors

Tape input

1balanced via XLR connector or

1single-ended via RCA connector, user configurable

Main outputs

2CAST via 4-pin bayonet connectors

1balanced via XLR connector

1single-ended via RCA connector

Tape outputs

1balanced via XLR connector and

1single-ended via RCA connector, buffered, connected to main input- selection bus

1balanced via XLR connector and

1single-ended via RCA connector, buffered, connected to a dedicated record-output bus

Control inputs

1RS-232 input via a 9-pin D-subminiature connector

1remote IR detector input via

a 3-conductor 3.5 mm connector

112 VDC trigger input via 3.5 mm connector

1 preamplifier link via an RJ-45 connector

Control outputs

2 individually programmable 12 VDC trigger outputs via 3.5 mm connectors

1 preamplifier link via an RJ-45 connector

Power output

1phono power output (±20 VDC) for KPE via a 9-pin D-subminiature connector

Input impedance

CAST: 35 Ohms

Balanced: 40 k Ohms

Single-ended: 20 k Ohms

Output impedance

CAST: >1 M Ohms

Balanced: 250 Ohms

Single-ended: 125 Ohms

Gain

12dB (CAST or balanced output)

6dB (single-ended output)

Volume control Balanced, current-mode,

16-bit, discrete R-2R ladder

Input overload

CAST: 11 mA RMS

Balanced: 9 V RMS

Single-ended: 18 V RMS

Output overload

CAST: 22 mA RMS

Balanced: 20 V RMS

Single-ended: 10 V RMS

Frequency response

20 Hz to 20 kHz ±0.01 dB

Balanced or single-ended inputs:

0.2Hz to 1.3 MHz +0, -3 dB CAST inputs:

0.2Hz to 2 MHz +0, -3 dB

Total harmonic distortion plus noise Balanced Output:

<0.003%, 20 Hz to 20 kHz, 4 V RMS CAST output: 4 mA RMS

Signal-to-noise ratio

4 V RMS balanced or 4 mA RMS CAST output

Wideband, unweighted: >97 dB

“A” weighted: >104 dB

Power consumption

Standby: 50 W

Power on: 80 W

Power on, with KPE: 90 W

Dimensions

Preamplifier only:

17.3in.W x 3.7 in. H x 18.5 in. D

43.8cm W x 9.5 cm H x 47 cm D

Power supply only:

17.3in. W x 3.7 in. H x 17.3 in. D

43.8cm W x 9.5 cm H x 43.8 cm D

Preamplifier channel:

17.3in. W x 7.3 in. H x 18.5 in. D

43.8cm W x 18.5 cm H x 47 cm D

Stereo pair:

17.3in. W x 14.6 in. H x 18.5 in. D

43.8cm W x 37.1 cm H x 47 cm D

Weight

Shipped: 69 lbs., 31.2 kg

Preamplifier only: 21 lbs., 9.5 kg

Power supply only: 31 lbs., 14 kg

56

Page 60
Image 60
Krell Industries EVOLUTION TWO MONAURAL PREAMPLIFIER manual Specifications, Control outputs

EVOLUTION TWO MONAURAL PREAMPLIFIER specifications

Krell Industries has long been a name synonymous with high-fidelity audio equipment, and their EVOLUTION TWO MONAURAL PREAMPLIFIER is a testament to this legacy. This premium preamp is designed to cater to audiophiles, delivering unparalleled sound quality and meticulous attention to detail.

At the heart of the EVOLUTION TWO lies Krell's commitment to superior audio performance. The preamplifier employs a fully balanced, differential signal path that minimizes noise and distortion, ensuring that the audio output is pure and true to the source. This architecture not only enhances sound quality but also integrates seamlessly with other high-end audio components in any setup.

One of the standout features of the EVOLUTION TWO is its advanced power supply design. Krell employs a toroidal transformer coupled with high-energy storage capacitors to provide stable, clean power. This allows for improved dynamics and transient response, helping to reproduce the complex nuances of music in a way that engages the listener. The preamplifier's power supply is designed to operate with extreme efficiency, ensuring consistent performance even during the most demanding listening sessions.

Additionally, the EVOLUTION TWO comes equipped with Krell's proprietary CAST (Current Audio Signal Transmission) technology. This innovative feature allows for a direct, impedance-matched connection between components, significantly reducing signal degradation over long cable runs. Audiophiles will appreciate the clarity and fidelity produced by CAST, revealing subtle textures and details in their favorite recordings.

The preamplifier also includes a range of inputs and outputs, catering to various audio sources and systems. Users can connect multiple devices, including digital sources, with ease, thanks to the EVOLUTION TWO's advanced input switching capabilities. The unit supports balanced XLR connections as well as unbalanced RCA outputs, providing flexibility for users with different equipment configurations.

Moreover, the EVOLUTION TWO MONAURAL PREAMPLIFIER boasts a stunning aesthetic, showcasing Krell's hallmark design philosophy. With its sleek chassis and elegant finish, the preamp not only sounds good but looks great in any audio setup.

In summary, the Krell Industries EVOLUTION TWO MONAURAL PREAMPLIFIER is a high-performance audio component that encapsulates cutting-edge technology and exceptional craftsmanship. With its balanced signal path, innovative power supply design, CAST technology, and versatile connectivity options, it is a remarkable addition to any serious audiophile's system, promising a listening experience that truly transcends the ordinary.