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One of, if Not BEST.... most amazing components we've ever heard - incorporates massive power supplies, Class A preamp Audiophile DAC
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Integrated Stereo Amplifier
The Digital Vanguard incorporates a 200-watt-per channel amplifier and a Class A preamplifier, enclosed in a chassis that borrows its design and construction from the new Krell Foundation preamp/processor, Connect stream player, Illusion preamp and iBias amplifiers. Digital support has been included with USB, HDMI, coaxial, and optical inputs as well as Ethernet audio and Bluetooth streaming.
The Vanguard’s amplifier incorporates a massive power supply with a 750 VA toroidal transformer and 80,000 microfarads of storage capacitance. The tremendous amount of energy on tap provides 200 watts per channel into 8 ohms and 400 watts into 4 ohms. Two quiet, thermostatically controlled fans permit the use of a surprisingly compact chassis.
The preamplifier section of the Vanguard borrows its balanced, fully discrete Class A circuit concepts from Krell’s top-of-the-line Illusion preamplifiers. Krell’s Current Mode technology is employed to assure unequaled signal bandwidth, easily enough to handle the latest high-resolution PCM and DSD audio sources without impacting high-frequency response and detail.
Packed with many of Krell’s most musical-sounding technologies, the elegant chassis is living-room-friendly. Yet it has enough power to achieve incredible, lifelike dynamics with any speaker.
The front-panel menu system provides configuration features such as input naming and input trim. Theater Throughput mode lets the Vanguard serve as the core of a surround-sound system without sacrificing two-channel sound quality. Analog Inputs include three stereo RCA and one stereo balanced XLR. High-quality WBT speaker cable terminals provide a secure, electrically ideal connection.
The Vanguard also offers features that make it perfect for custom installation, such as 3.5mm jacks for IR input and 12-volt trigger input and output, as well as optional rack-mount ears. Additionally, the unit can be controlled with home automation systems through its Ethernet connection.
A key feature for the Digital Vanguard is its digital module, which includes USB, HDMI inputs and output, coax and optical digital inputs; Ethernet music streaming controlled through dedicated iOS and Android apps: Roon, Tidal, and Deezer services* which can all be integrated into mconnect's Control app**; and Bluetooth wireless for convenient streaming from phones, tablets and computers.
The Vanguard also offers features that make it perfect for custom installation, such as 3.5mm jacks for IR input and 12-volt trigger input and output, as well as optional rack-mount ears. Additionally, the unit can be controlled with home automation systems or the Krell web server through its Ethernet connection.
*A subscription is required for these services. Updating the digital module software may also be necessary depending on the vintage of the unit (see the download area at the bottom of the page).
**Krell highly recommends that users of the mconnect Control app update to the latest version of the app (v2.4.1 or higher for Apple devices and v2.3.7 or higher for Android devices). This fixes a potential issue where getting a phone call while using the phone to play music to the Digital Vanguard or Vanguard DAC could result in a large increase in volume level.
Keeping the mconnect Control app up-to-date also ensures access to any new features and performance improvements.
Digital Vanguard Specifications
1 pr. balanced via XLR connectors
3 pr. single-ended via RCA connectors
1 USB(Front Panel)
1 RJ45 Network Port
1 pr. speaker outputs via WBT gold-plated binding posts
1 HDMI with ARC support
1 remote IR detector input via 3-conductor 3.5 mm connector
1 12 VDC trigger input via 2-conductor 3.5 mm connector
1 programmable 12 VDC trigger output (300 mA maximum current) via 2-conductor 3.5 mm connector
Balanced: 95 kΩ
Single-ended: 47.5 kΩ
20 Hz to 20 kHz +0, –0.01 dB
< 2 Hz to 150 kHz +0, –3 dB
> 90 dB, wideband, unweighted, at maximum gain, referred to full power output
> 97 dB, “A”-weighted
Single-ended or balanced: 160 mV RMS
Total harmonic distortion
< 0.015% at 1 kHz, at 200 W, 8 Ω load
< 0.13% at 20 kHz, at 200 W, 8 Ω load
200 W RMS per channel at 8 Ω
400 W RMS per channel at 4 Ω
113 V peak to peak
40 V RMS
16 A peak
< 0.066 Ω at 20 Hz
< 0.075 Ω, 20 Hz to 20 kHz
> 121 at 20 Hz, referred to 8 Ω
>106, 20 Hz to 20 kHz, referred to 8 Ω
Standby: 12 W
Idle: 70 W
Maximum: 1300 W
Standby: 41 BTU/hr
Idle: 239 BTU/hr
Maximum: 4436 BTU/hr
17.1 in W x 4.15 in H x 17.5 in D
434 mm W x 105 mm H x 445 mm D
Unit only: 39 lb [17.7 kg]
As shipped: 47 lb [21.3 kg]
Digital Module Specs
Coaxial and HDMI inputs support PCM up to 24-bit/192kHz. Optical input up to 24-bit/96kHz
HDMI inputs support DSD and 4K video content. HDMI output supports Audio Return Channel (ARC)
USB and Network streaming support MP3, AAC, WMA, WAV(PCM), FLAC, ALAC up to 192kHz
Bluetooth streaming supports A2DP, AVRCP, HFP, HSP