Crown Micro-Tech MT-1000 Informations techniques télécharger pdf (Page 18)

Page 18

Micro-Tech 600/1200/2400 Power Amplifiers

A better approach is to fuse each driver independently.

This allows you to apply the most appropriate protec-

tion for the type of driver being used. In general, low-

frequency drivers (woofers) are the most susceptible

to thermal damage and high-frequency drivers (tweet-

ers) are usually damaged by large transient voltages.

This means that your loudspeakers will tend to have

better protection when the woofers are protected by

slow-blow fuses and high-frequency drivers are pro-

tected by high-speed instrument fuses.

3.4 AC Mains Power Requirements

All

Micro-Tech

amplifiers are shipped with an appropri-

ate line cord and plug. The standard cord and plug for

each model are listed by country (or region) in Fig-

ure 3.16. When possible, use a power receptacle on a

dedicated circuit, and always make sure it will provide

the right voltage with sufficient current. We do not rec-

ommend operating your amplifier with voltages greater

than 10% above or below the unit’s rated voltage. For

example, an amplifier rated for 120 VAC operaton

should not exceed 132 VAC. See Section 7 for power

requirements under a variety of conditions.

3.3.6 Additional Load Protection

Micro-Tech

amplifiers can deliver very high power lev-

els, so it’s a good idea to add some protection if its not

already built into your loudspeakers. Loudpseakers are

subject to thermal damage from sustained overpower-

ing and mechanical damage from large transient volt-

ages. In both cases, fuses may be used to protect your

loudspeakers.

Thermal protection and voltage protection require dif-

ferent types of fuses. Slow-blow fuses are used to pre-

vent thermal damage because they respond to thermal

conditions like a loudspeaker. High-speed instrument

fuses like the Littlefuse 361000 series are used to pro-

tect loudspeakers from transient voltages. The nomo-

graph in Figure 3.15 can be used to select the correct

fuse for thermal or voltage protection.

There are two common ways to install the fuses. One

approach is to put a single fuse in series with each

output. This is easy because there is only one fuse per

channel to install. But if the fuse blows, power is re-

moved from all of the connected loads.

All specifications in this manual were measured using

120 VAC, 60 Hz power mains unless otherwise noted.

Specifications are derived using a mains voltage that

is accurate to within 0.5% with THD less than 1.0%

under all testing conditions. Performance variations

can occur at other AC mains voltages and line frequen-

cies. In addition, line regulation problems will directly

affect the output power available from the amplifier.

Fig. 3.15 Loudspeaker Fuse Nomograph

Fig. 3.16 AC Mains Cords and Plugs

Country or Region

Micro-Tech

600

Cord Plug Cord Plug

Australia, New Zealand

Brazil, Guam, Hong Kong,

Jamaica, Japan, Peru,

Phillipines, Singapore,

Tahiti, Taiwan, Thailand,

Venezuela

NEMA

5-15P

14/3 SJT NEMA

5-15P

12/3 SO NEMA

5-15P

1.5 mm

AS 3112

10 A

14/3 SJT

BS 546

BS1363

1.5 mm

BS 546

BS1363

1.5 mm

BS 546

BS1363

1.5 mm

Central America,

North America

NEMA

5-15P

14/3 SJT NEMA

5-15P

12/3 SO NEMA

5-20P

14/3 SJT

India, South Africa

Ireland, Norway,

United Kingdom,

United Arab Emirates

1.5 mm

AS 3112

10 A

1.5 mm

Micro-Tech

1200

Cord

AS 3112

15 A

Argentina, Austria, China,

Denmark, Finland, France,

Germany, Greece, Holland,

Indonesia, Italy, Korea,

Malaysia, Portugal, Spain,

Sweden, Switzerland,

Turkey

1.5 mm

CEE 7/7 1.5 mm

CEE 7/7

Plug

Micro-Tech

2400

1.0

1.2

1.4

1.6

2.5

1.5

.15

.08

3000

2000

1500

1000

800

600

400

300

200

150

100

1.5

LOUDSPEAKER IMPEDANCE

(ohms)

FUSE

(amps)

LOUDSPEAKER RATING

PEAK MUSIC POWER

(watts)

(Typically 4 times the continuous average power)

Answer: Fuse = 1.5 A

Example:

Impedance = 8 ohms.

Peak Power = 75 W

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 38 39

Commentaires sur ces manuels

Pas de commentaire

Crown Micro-Tech MT-1000 Informations techniques Page 18

Commentaires sur ces manuels

Produits connexes et manuels pour Amplificateurs audio Crown Micro-Tech MT-1000