Viola Systems Spirito Reference Series Preamplifier Uživatelský manuál stáhnout pdf (Strana 10)

STEREO POWER AMPLIFIER

CONCERTO

Housed in the same size billet Aluminum chassis as the Cre-

scendo, the Concerto delivers 125W into 8 ohms and 225W

into 4 ohms. Like all Viola power ampliers the Concerto

uses a choke input power supply. This reduces peak charging

currents that are prevalent in capacitor input supplies. This

minimizes intermodulation distortion on the power supply

rails on ground returns.

Concerto Audio Design

The Concerto is a Class AB biased push-pull amplier design.

The Concerto incorporates Motorola ThermalTrak™ into the

bias network. This provides fast thermal feedback information

without the thermal lag of other bias topologies. A center chas-

sis Venturi style heat sink provides cooling for the amplier.

Connections to loudspeakers are provided by a pair of WBT

nextgen™ connectors per channel.

Network

The Concerto can be connected to the Crescendo preamplier

via the CAN (Controller Area Network) connector. When this

is done Concerto status information including temperature and

line voltage are transmitted to the Wi-Fi remote application.

This also provides synchronization of the color displays and

standby modes.

Viola Concerto Specications

Output Power Stereo Mode

125W into 8 ohms

20Hz to 20kHz , THD < 0.25%

225W into 4 ohms

20Hz to 20kHz , THD < 0.5%

Bridge Mode

450W into 8 ohms

650W into 4 ohms

All power gures quoted are continuous average power

Inputs 2 x XLR

Outputs 1 pair of WBT terminals

Frequency Response 10Hz to 20kHz ± 0.15dB at 1W into 8 ohms

5Hz to 100kHz, -3dB at 1W into 8 ohms

Power Bandwidth 5Hz to 100kHz +0, -3dB

SN Ratio >85dB @ 1kHz 125W, C weighted

Dimensions 17.5’’W x 3.5’’H x 15’’D

44.5cm W x 8.9cm H x 38.1cm D

Weight 35 lbs. (15.9kg)

(Preliminary Speciﬁcations)

Warranty

Products of Viola Audio Labs are warranted to be free of defects

if used under normal conditions for a period of ve years from

the date of manufacture.

All specications are subject to change without notice.

Viola Audio Laboratories

446 Blake Street

New Haven, CT 06515 U.S.A. www.VIOLALABS.COM

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