Stereo Power Amplifiers
Page 3
NOTE: Ensure that the amplifier is not continually
driven into clipping. Prolonged use in the clip mode
could cause permanent damage to connected speakers.
Volume controls should be adjusted so the “clip”
LED’s rarely illuminate.
Trouble Shooting
If amplifier fails to deliver the rated performance, see
below:
NO POWER
(Power LED light does not illuminate) Check mains fuse.
Only replace with the correct fuse, as stated on the rear
panel of the amplifier.
DISTORTED OUTPUT
Check that the speaker type is correct for the output that you are using. Measure speaker impedance.
DO NOT CONNECT 100V LINE SPEAKERS TO THIS AMPLIFIER
VERY LOW OUTPUT
Make sure that the input is the correct level (check for shorted connectors). Check for any short circuits on the
speaker line.
AMPLIFIER KEEPS ON CUTTING IN & OUT
Make sure that there is adequate ventilation around the amplifier. Ensure the vent slots on the case are not
covered or blocked. Check also the speaker types, ratings and for any short circuits on the speaker line.
PROTECTION LED LIGHT ILLUMINATES
Make sure that there is adequate ventilation around the amplifier. Ensure the vent slots on the case are not
covered or blocked. Check also the speaker types, ratings and for any short circuits on the speaker line.
S
PECIFICATIONS
*Specifications subject to change without notice
POWER OUTPUT
A 4154
100W RMS into 8
Ω
per channel
170W RMS into 4
Ω
per channel
A 4156
200W RMS into 8
Ω
per channel
350W RMS into 4
Ω
per channel
A 4158
300W RMS into 8
Ω
per channel
450W RMS into 4
Ω
per channel
Distortion: ........................................................................................
≈
0.04%
Frequency response: ..............................................10Hz - 50kHz, -1.5dB
Speaker outputs: ............................................................................4 – 8
Ω
.
Input Sensitivity: ................................................................................0.77V
Signal to noise ratio: ........................................................................>90dB
OUTPUT CONNECTORS
Speakers: ............Binding posts, 4 pin Heavy duty speaker connectors,
6.35mm Jacks.
INPUT CONNECTORS
Inputs: ................................................6.35mm jacks, or RCA connectors.
240V AC power: ......................................................IEC power connector
CONTROLS
Volume: ..................................................................Channel 1, Channel 2
Power: ..................................................................................On/off switch
Indicators: ................................................................Power, Protect, Clip.
Power supply: ..............................................................................240V AC
Fuse protection:
A 4154: ..........5A 250V Fast Blow
A 4156: ..........8A 250V Fast Blow
A 4158: ........10A 250V Fast Blow
Weight:
A 4154: ................................9.5Kg
A 4156: ..............................11.5Kg
A 4159: ................................13Kg
Dimensions: ..................................430 W X 300 D X 85 H (standard 2U)
Colour: ..............................................................................................Black
+
+
+
4
Ω
Min
Stereo
(Binding Post)
+
4
Ω
Min
Channel 1
Channel 2
+
+
+
4
Ω
Min
Pin 1+
Stereo
(Speaker Connector)
Pin 1-
+
Pin 1+
Pin 1-
4
Ω
Min
Channel 1
Channel 2
Connect to binding post or speaker connectors as desired. Ensure
load is correct.
4Ω minimum.
