Dali Phantom CI AMP-4750 DSP handleiding

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8.9 GPIO Setup and Connection

The AMP-4750 DSP amplifier provides a GPIO socket

that enables remote control of volume, standby, mute

and trigger functions. The GPIO connector pin functions

are described in the [GPIO] Seings menu illustrated

in Diagram8N. The connection of GPIO based remote

volume control and standby/mute are illustrated in

Diagram8O and Diagram8P respectively.

NOTES

The GPIO connector must not be used for any

unintended purpose. Amplifier damage may

result from incorrect use of GPIO.

Shielded cable must be used when connecting

standby switches and potentiometers via GPIO.

GPIO Pin 8 has a low output impedance and is

able to supply a maximum current of 10mA.

GPIO Pin 1 and Pin 3 both oer ground

connections: Pin 1 is connected directly to the

amplifier chassis. Pin 3 is connected to the

chassis via a 220 Ohm resistor. The “so

ground” connection of Pin 3 is potentially useful for

managing ground loops that may cause audible hum.

Diagram8N

AMP CONFIGURATOR [GPIO] Seings Menu

Diagram8O

Potentiometer connections for remote volume control via GPIO

Diagram8P

Connections for remote standby/mute switch via GPIO

+3V3

Potentiometer

(>10kΩ)

Connect Wiper to

Pin 4, 5, 6 or 7.

Ground

Ground

Standby/Mute

Switch open or closed toggles

Standby or Mute depending on

options selected in the GPIO

Seings Menu

NOTE

Diagram6F illustrates use of the GPIO connector.

9. Specifications

DALI PHANTOM CI AMP-4750 DSP

Frequency range 12Hz – 20kHz

(+/- 1dB, 8 Ω load, 3dB below rated power)

Connection input(s) 4 × Analogue unbalanced, RCA

4 × Analogue balanced, Euroblock connector

1 × S/PDIF, RCA

Output channels 4 × Lo-Z loudspeaker (4 - 16Ohm)

2 × Hi-Z loudspeaker (70V / 100V)

1 × S/PDIF digital out, RCA

Maximum speaker cable cross section 2,5mm2 / AWG 14 (Euroblock standard)

Output power @ 4Ohm 4 × 750W (SE)*

2 × 1500W (BTL)**

Output power @ 8Ohm 4 × 400W (SE)

2 × 1500W (BTL)

Output power @ 70V 2 × 1200W (BTL)

Output power @ 100V 2 × 1500W (BTL)

Total system power 3000W

Power consumption 1100W

Output voltage SE: 85Vp / 170Vpp (unloaded)

BTL: 170Vp / 340Vpp (unloaded)

70/100V (Hi-Z)

Output circuitry UMAC™ Class D.

Full bandwidth PWM modulator with ultra-low distortion

Signal to noise-ratio >106dB

(A-weighted, 20Hz - 20kHz, 8 Ω load)

THD+N (pical) < 0.05 %

(20Hz - 20kHz, 8 Ω load, 3dB below rated power)

Other features Short circuit protection

DC protection

Undervoltage protection

Temperature protection

Overload protection

Rack mountable

Power supply UREC™ universal mains switch mode power supply with Power Factor Correction (PFC) and

standby converter

Operating temperature 0 - 40° C

Operating voltage/ frequency Universal mains

100V - 240V, 50 - 60Hz

Power ratings 1 % THD @ 120VAC and 230VAC

Standby consumption < 0.5W

Outer dimensions (H x W x D) 88 × 440 × 332mm

3.50 × 17.30 × 13.10inches

Weight 7.22kg

15.91lb

Shipping weight 9.34kg

20.59lb

Accessories 2 × Two channel balanced input connector

2 × Two channel speaker output connector

1 × GPIO socket connector

1 × Mains power cable

4 × Adhesive rubber feet

2 × Rack mount ears (mounted)

*SE – conventional, single ended output mode

**BTL – bridge-tied load output mode

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