Cloud VTX 4120 Manuel d'utilisateur télécharger pdf

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CLOUD VTX POWER AMPLIFIERS

MODELS VTX4120, VTX4240 & VTX4400

Cloud Electronics Limited

140 Staniforth Road, Shefeld, S9 3HF. England. Telephone: +44 (0)114 244 7051 Fax: +44 (0)114 242 5462 Web: www.cloud.co.uk Email: [email protected]

General Description

The Cloud VTX range of four-channel power ampliers are

intended for commercial and industrial public address and sound

reinforcement applications where unquestionable long-term

reliability is the primary consideration.

There are three models in the range:

MODEL POWER

VTX4120 4 x 120 W

VTX4240 4 x 240 W

VTX4400 4 x 400 W

The ampliers are designed to deliver their full rated power into

loads down to 4 ohms for long periods of time. The circuit design

includes clip limiting and switch-on delay, together with DC, thermal,

short-circuit and reactive load protections. All models are built in

a very solid steel 2U chassis, and employ variable–speed forced-air

cooling.

Pairs of channels may be operated in Bridge Mode; rear panel

switches are provided to enable this. Bridge Mode operation allows

power outputs of double the normal rating to be delivered to a load

of 8 ohms (minimum).

In addition to the power switch, the front panel is tted with a set of

four LEDs for each channel, conrming power status, signal presence,

peak level and activation of amplier protection circuitry. Rear panel

controls are provided for individual channel gain trims, input routing

(to congure the ampliers for mono, dual stereo or four channel

operation), Ch1/2 and Ch3/4 bridge mode, and per-channel high pass

lters. The inputs are electronically balanced.

Standard options are the Cloud RL-1 remote volume control plates

and Bose® EQ cards, either or both of which may be tted to any

or all channels. A further option is the VTX-WM1 web monitor card,

which permits continuous external surveillance monitoring of the

amplier’s performance on any computer via a standard Ethernet

connection. See VTX-WM1 datasheet for full details.

• High power multichannel ampliers for “install-and-forget”

applications

• 4 x 120 W (VTX4120), 4 x 240 W (VTX4240) and 4 x 400 W

(VTX4400) into 4 ohms

• Extensive protection against short-circuit and reactive loads,

clipping, DC and overheating

• Chs1 & 2 and/or 3 & 4 may be operated in Bridge Mode

• Per-channel, front-panel LEDs for power status, signal presence,

peak level and protection

• Balanced line level inputs with gain trim

• Congurable for 4 channel, dual stereo or mono use

• Per-channel switched hi-pass lter (18 dB/oct below 65 Hz)

• Optional VTX-WM1 card allows amplier monitoring from any

standard web browser

• Optional remote volume control (per-channel)

• Optional Bose® EQ cards (per-channel)

• 2U 19” rackmounting unit

• Forced-air cooling

• Five year warranty

VTX Power Amplier (tted with optional VTX-WM1 web monitor card)

PEAK

SIGNAL

POWER

1 2 3 4

PROTECT

CHANNEL

VTX 4120

4x 120W Amplifier

PEAK

SIGNAL

POWER

1 2 3 4

PROTECT

CHANNEL

VTX 4240

4x 240W Amplifier

PEAK

SIGNAL

POWER

1 2 3 4

PROTECT

CHANNEL

VTX 4400

4x 400W Amplifier

CHANNEL 2CHANNEL 1 CHANNEL 3

CHANNEL 4

CH3 CH4

CH2

SPEAKER OUTPUTS

CH1

CH2

CH3

CH4

OFF

BRIDGE

1-2

OFF

BRIDGE

3-4

4 OHMS - MIN

BRIDGE

3-4

BRIDGE

1-2

POWER ~ 40-60Hz

10%

1 2 3 4

Résumé du contenu

Page 1 - CLOUD VTX POWER AMPLIFIERS

Clearly better soundCLOUD VTX POWER AMPLIFIERSMODELS VTX4120, VTX4240 & VTX4400Cloud Electronics Limited140 Staniforth Road, Shefeld, S9 3HF.

Page 2 - Input Routing

Clearly better soundInput RoutingThe input routing switches of the VTX range permit mono, stereo or 4-channel operation without any external para

Page 3 - System Examples

Clearly better soundGraphsVTX4400 CH1 Frequency response, 4 Ohm load, 400W Ouptut-10+10-9-8-7-6-5-4-3-2-1-0+1+2+3+4+5+6+7+8+9dBr20 20k50 100 200 500

Page 4 - Technical Specications

Clearly better soundArchitect’s and Engineer’s SpecicationThe power amplier shall have four identical channels, and shall be available i

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