JBL MPA1100 Скачать руководство пользователя страница 10

9

AC Power Connection

AC Connection is made through a standard Schuko or NEMA grounded plug. While
all models meet Safety Agency requirements for current consumption of less than 12
amp, 120 Vac during “normal” operation, peak current consumption can be higher
on the MPA1100 or MPA750.

The amplifiers can be wired for 100, 120, or 220–240 Vac, 50–60 Hz. 

Some background on AC ratings is necessary to fully understand the limitations

on current draw. Essentially, there are three ratings of interest: (1) the legal operating
current as measured by the Safety Agencies, (2) the maximum expected average
under worst-case program material, and (3) the peak current draw at full output
power. 

All major safety agencies around the world measure amplifier current and

temperature rise under the same “normal operating conditions” using a pink noise
signal with an average power equal to one eighth of maximum power. This was in
response to industry complaints that the former test level of one third power was
unrealistic for high-quality professional amplifiers. To put these levels in perspective,
music played at one third average power will be in a state of constant clipping, and
this power level is about the greatest one can obtain without completely obliterating
the program under clipping. The one eighth power level is about as loud as you can
play music while making some attempt to avoid obvious clipping. 

We had to satisfy the following conditions:

1. Meet the safety agency requirements for “normal” current draw.

2. Remain within the functional limits of the plug for “severe program levels.”

3. Avoid unsafe conditions at full output power. 

The AC consumption for each power level and load impedance is shown in

Table 1 and Table 2 (see pages 9 and 10).

The safety agencies are concerned with the current levels shown under the one

eighth power column. This is because building codes prohibit the connection of a
single load which exceeds 80% of the capacity of the branch circuit. 

JBL Engineering standards call for ability to operate at one third power, in order

to meet the demands of “worst-case” heavily compressed, clipped program material.
This will use the AC current shown in the one third power column. The amplifier’s
protective circuits will not permit long-term operation at full power into 2 ohms.

Installation

Содержание MPA1100

Страница 1: ...P r o f e s s i o n a l A m p l i f i e r Clip 10dB 20dB Signal Present Clip 10dB 20dB Signal Present Power Protect 1 CHANNEL 2 18 10 8 6 4 12 14 24 0 2 48 18 10 8 6 4 12 14 24 0 2 48 Clip 10dB 20dB...

Страница 2: ...HE RISK OF ELECTRIC SHOCK DO NOT REMOVE THE COVER NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL VORSICHT UM DAS RISIKO EINES ELEKTRISCHEN SCHLAGES ZU VERMINDERN ABDEC...

Страница 3: ...peaker Outputs 5 Figure 5 Typical Unbalanced Connection 6 Figure 6 Portable Balanced System 6 Figure 7 Installed Balanced System 6 Figure 8 Ground Bus Connection 6 Figure 9 Jumper Positions for XLR Po...

Страница 4: ...ort within the rack must be used in portable applica tions Open Input Architecture Slots Provided with each MPA Series amplifier is a standard input module This module and the upper input cover panel...

Страница 5: ...6 7 13 23 22 23 22 25 29 24 27 28 26 30 31 31 25 29 24 27 28 26 30 31 31 Figure 2 Rear and Front Panel for 2 Space High Models MPA275 MPA400 MPA600 Figure 3 Rear and Front Panel for 3 Space High Mode...

Страница 6: ...ce is 20 kilohm balanced 10 kilohm unbalanced as is typical of JBL amplifiers The input jacks are located on a removable panel which has a toggle switch for 1 bridged mono 2 normal stereo or 3 paralle...

Страница 7: ...ld at the source with no connection to pin 1 at the amplifier If after wiring the input as shown above any hum or buzzing is present connect the GND terminals of all amplifiers together This bus shoul...

Страница 8: ...the rear panel 5 Install the input ribbon cable and remount the Standard Input Module securely To Parallel the Inputs 1 Locate the selector switch adjacent to the CHANNEL 1 input XLR connector and se...

Страница 9: ...MIN CH 2 CH 1 DUAL CHANNEL OUTPUT CONNECTOR STEREO 4 OHM MIN PER CH CONNECT ONE SPEAKER LOAD ONLY Use Either Binding Posts or Stereo Speakon but not both 2 2 1 1 BRIDGED MONO MODE CAUTION Output volt...

Страница 10: ...hese levels in perspective music played at one third average power will be in a state of constant clipping and this power level is about the greatest one can obtain without completely obliterating the...

Страница 11: ...1400 x 2 56 0 A 23 4 A 11 8 A 8 8 510 x 2 18 6 A 9 8A 4 8 A MPA750 4 4 760 x 2 30 0 A 14 8 A 6 8 A 0 8 A 2 2 1000 x 2 39 4 A 21 4 A 10 6 A 8 8 425 x 2 13 6 A 8 6 A 3 6 A MPA600 4 4 610 x 2 23 0 A 13 4...

Страница 12: ...A 2 2 1400 x 2 28 0 A 11 7 A 5 9 A 8 8 510 x 2 9 3 A 4 9A 2 4 A MPA750 4 4 760 x 2 15 0 A 7 4 A 3 4 A 0 4 A 2 2 1000 x 2 19 7 A 10 7 A 5 3 A 8 8 425 x 2 7 8 A 4 3 A 1 8 A MPA600 4 4 610 x 2 11 5 A 6 7...

Страница 13: ...proaches maximum tempera ture Illuminated steadily plus flashing during thermal muting Illuminated steadily during non thermal muting Typical Power Up Operation Power Down Behavior When the amplifier...

Страница 14: ...bnormal PROTECT may flash too CLIP flashing at full LEVEL display indicates the amp has reached full power clipping and the limiter is acting to prevent severe overdrive A steady CLIP glow after the f...

Страница 15: ...hose models rated at 2 ohms see Specifications the LEVEL 10 display should not be on more than about half the time with only occa sional clipping Protection Circuits The essence of high efficiency lig...

Страница 16: ...f 15 dB If this does not arrest the temperature rise in case of an output short or blocked ventilation the amplifier will finally enter full muting which causes full shutdown of the output bias circui...

Страница 17: ...oad grounding relay with internal fault fuses Complementary linear high efficiency outputs 3 step on MPA1100 2 step on MPA750 MPA600 MPA400 1 step on MPA275 100 120 220 240 Vac 50 60 Hz See Charts on...

Страница 18: ...720 650 700 750 500 550 600 350 375 400 225 250 275 900 1000 1100 480 510 550 400 425 450 275 290 300 180 190 200 740 770 800 700 760 825 550 610 675 400 425 450 275 300 400 1000 1100 1200 900 950 100...

Страница 19: ...1 THD 1 dB 50 Hz AC Power Mains 220 VAC 230 VAC 240 VAC 660 690 720 220 VAC 230 VAC 240 VAC 650 700 750 500 550 600 350 375 400 225 250 275 220 VAC 230 VAC 240 VAC 900 1000 1100 220 VAC 230 VAC 240 VA...

Страница 20: ...TECT display is visible amplifier has muted due to extreme overheating Fan should be running at full speed and unless ventila tion is blocked operation should resume within one minute B The amplifier...

Страница 21: ...speed 50 60 C Fan Speed rises gradually from slow to full 75 C PROTECT LED starts flashing 85 C PROTECT flash rate increases and CLIP starts to glow steadily The limiter will begin to reduce amplifie...

Страница 22: ...ty without prior authorization You may obtain that authorization by contacting the factory or repair facility directly Please ship amplifiers in original packing materials or equiva lent to prevent fu...

Страница 23: ...Part No TD 007500 OB PS137 2 A Harman International Company JBL Incorporated 8500 Balboa Boulevard Northridge California 91329USA...

Отзывы: