Altronics Biema A 4158 Series Operating Instructions - Page 3

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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.

POWER OUTPUT

A 4154

A 4156

A 4158

Distortion: ........................................................................................≈0.04%

Frequency response: ..............................................10Hz - 50kHz, -1.5dB

Speaker outputs: ............................................................................4 – 8Ω.

Input Sensitivity: ................................................................................0.77V

Signal to noise ratio: ........................................................................>90dB

OUTPUT CONNECTORS

Speakers: ............Binding posts, 4 pin Heavy duty speaker connectors,

*Specifications subject to change without notice

PECIFICATIONS

100W RMS into 8Ω per channel

170W RMS into 4Ω per channel

200W RMS into 8Ω per channel

350W RMS into 4Ω per channel

300W RMS into 8Ω per channel

450W RMS into 4Ω per channel

6.35mm Jacks.

Stereo Power Amplifiers

Stereo

(Binding Post)

Channel 1

Channel 2

4Ω Min

Connect to binding post or speaker connectors as desired. Ensure

load is correct. 4Ω minimum.

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:

Weight:

Dimensions: ..................................430 W X 300 D X 85 H (standard 2U)

Colour: ..............................................................................................Black

Stereo

(Speaker Connector)

Channel 1

Channel 2

Pin 1+

Pin 1-

4Ω Min

A 4154: ..........5A 250V Fast Blow

A 4156: ..........8A 250V Fast Blow

A 4158: ........10A 250V Fast Blow

A 4154: ................................9.5Kg

A 4156: ..............................11.5Kg

A 4159: ................................13Kg

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