Sirus I-Amp 4.500 User manual

I-Amp 4.500, I-Amp 8.150
Power Amplier
User Manual

Thomann GmbH
Hans-Thomann-Straße 1
96138 Burgebrach
Germany
Telephone: [phone]
Internet: www.thomann.de
19.07.2023, ID: 551990, 551992 (V2)

Table of contents
1 General information................................................................................................................................. 5
1.1 Symbols and signal words............................................................................................................... 5
2 Safety instructions..................................................................................................................................... 7
3 Features....................................................................................................................................................... 10
4 Installation and starting up................................................................................................................ 12
5 Connections and controls................................................................................................................... 15
6 Technical specications....................................................................................................................... 22
7 Plug and pin assignments................................................................................................................... 26
8 Cleaning....................................................................................................................................................... 27
9 Protecting the environment.............................................................................................................. 28
Table of contents
I-Amp 4.500, I-Amp 8.150 3
Power Amplier

4I-Amp 4.500, I-Amp 8.150
Power Amplier

1 General information
This document contains important instructions for the safe operation of the product. Read and
follow the safety instructions and all other instructions. Keep the document for future refer‐
ence. Make sure that it is available to all those using the product. If you sell the product to
another user, be sure that they also receive this document.
Our products and documentation are subject to a process of continuous development. They
are therefore subject to change. Please refer to the latest version of the documentation, which
is ready for download under www.thomann.de.
1.1 Symbols and signal words
In this section you will nd an overview of the meaning of symbols and signal words that are
used in this document.
General information
I-Amp 4.500, I-Amp 8.150 5
Power Amplier

Signal word Meaning
DANGER! This combination of symbol and signal word indicates an
immediate dangerous situation that will result in death or
serious injury if it is not avoided.
WARNING! This combination of symbol and signal word indicates a pos‐
sible dangerous situation that can result in death or serious
injury if it is not avoided.
NOTICE! This combination of symbol and signal word indicates a pos‐
sible dangerous situation that can result in material and
environmental damage if it is not avoided.
Warning signs Type of danger
Warning – high-voltage.
Warning – danger zone.
General information
6I-Amp 4.500, I-Amp 8.150
Power Amplier

2 Safety instructions
This device amplies electric audio frequency signals to operate passive speakers. Use the
device only as described in this user manual. Any other use or use under other operating con‐
ditions is considered to be improper and may result in personal injury or property damage. No
liability will be assumed for damages resulting from improper use.
This device may be used only by persons with sucient physical, sensorial, and intellectual
abilities and having corresponding knowledge and experience. Other persons may use this
device only if they are supervised or instructed by a person who is responsible for their safety.
Safety
DANGER!
Risk of injury and choking hazard for children!
Children can suocate on packaging material and small parts. Children can injure themselves when handling the device. Never allow
children to play with the packaging material and the device. Always store packaging material out of the reach of babies and small
children. Always dispose of packaging material properly when it is not in use. Never allow children to use the device without supervi‐
sion. Keep small parts away from children and make sure that the device does not shed any small parts (such knobs) that children
could play with.
DANGER!
Danger to life due to electric current!
Within the device there are areas where high voltages may be present. Never remove any covers. There are no user-serviceable parts
inside. Do not use the device when covers, safety equipment or optical components are missing or damaged.
Intended use
Safety instructions
I-Amp 4.500, I-Amp 8.150 7
Power Amplier

DANGER!
Danger to life due to electric current!
A short circuit could lead to a re hazard and risk of death. Always use proper ready-made insulated triple-core mains cable with a
safety plug. Do not modify the mains cable or the plug. In case of isolation damage, disconnect immediately the power supply and
arrange repair. If in doubt, seek advice from a qualied electrician.
WARNING!
Possible hearing damage due to high volumes on speakers or headphones!
With speakers or headphones connected, the device can produce volume levels that may cause temporary or permanent hearing
impairment. Over an extended period of time, even levels that seem to be uncritical can cause hearing damage. Do not operate the
device permanently at a high volume level. Decrease the volume level immediately if you experience ringing in your ears or hearing
impairment.
NOTICE!
Risk of re due to covered vents and neighbouring heat sources!
If the vents of the device are covered or the device is operated in the immediate vicinity of other heat sources, the device can over‐
heat and burst into ames. Never cover the device or the vents. Do not install the device in the immediate vicinity of other heat
sources. Never operate the device in the immediate vicinity of naked ames.
NOTICE!
Damage to the device if operated in unsuitable ambient conditions!
The device can be damaged if it is operated in unsuitable ambient conditions. Only operate the device indoors within the ambient
conditions specied in the “Technical specications” chapter of this user manual. Avoid operating it in environments with direct sun‐
light, heavy dirt and strong vibrations. Avoid operating it in environments with strong temperature uctuations. If temperature uc‐
tuations cannot be avoided (for example after transport in low outside temperatures), do not switch on the device immediately.
Never subject the device to liquids or moisture. Never move the device to another location while it is in operation. In environments
with increased dirt levels (for example due to dust, smoke, nicotine or mist): Have the device cleaned by qualied specialists at reg‐
ular intervals to prevent damage due to overheating and other malfunctions.
Safety instructions
8I-Amp 4.500, I-Amp 8.150
Power Amplier

NOTICE!
Damage to the device due to high voltages!
The device can be damaged if it is operated with the incorrect voltage or if high voltage peaks occur. In the worst case, excess vol‐
tages can also cause a risk of injury and res. Make sure that the voltage specication on the device matches the local power grid
before plugging in the device. Only operate the device from professionally installed mains sockets that are protected by a residual
current circuit breaker (FI). As a precaution, disconnect the device from the power grid when storms are approaching or it the device
will not be used for a longer period.
NOTICE!
Risk of re due to installation of a wrong fuse!
Using fuses of a dierent type than compatible with the device may cause a re and seriously damage the device. Only use fuses of
the same type. Observe the labelling on the device casing and the information in the "Technical data” chapter.
NOTICE!
Interference with nearby electrical devices due to magnetic elds!
The device generates strong magnetic elds that can interfere with the function of poorly shielded devices. The magnetic elds are
strongest directly above and below the Power Amplier. You should therefore never place sensitive devices such as pre-ampliers,
radio transmission systems, or tape decks directly above or below the Power Amplier. When placing the Power Amplier in a rack,
you should place it at the bottom thereof, and place any other equipment at the top of the rack.
Safety instructions
I-Amp 4.500, I-Amp 8.150 9
Power Amplier

3 Features
n4-channel installation amp, 4×250 watts @ 8 ohm, 4×450 watts @ 4 ohm, 4×800 watts @ 2
ohm (RMS), Class-D amplier
nBridge Mono mode: 2×1600 watts @ 4 ohm, 2×900 watts @ 8 ohm (RMS)
n8 modes: ABCD stereo, ABCD parallel, AB + CD bridged, AB + CD parallel, AB stereo CD
bridged, AB parallel CD bridged, AB stereo + CD Sub, AB stereo + CD Sub (Input AB)
nLow-noise and low-distortion due to high-current switching capacity
nProtection circuits such as thermal, short circuit, on/o muting
nLimiter, Euroblock input and output, gain on the front for easy access
nSignal, clip, protect and power LED, Euroblock contacts for deactivation, priority and error
status
nFrequency response 20 Hz…20 kHz, input impedance 20 k ohm balanced / 10 k ohm
unbalanced
nDimensions: (W × D × H) 483 × 360 × 44 mm, 19-inch rack size (1 RU)
nWeight: 6.3 kg
Sirus I-Amp 4.500
Features
10 I-Amp 4.500, I-Amp 8.150
Power Amplier

n8-channel installation amp, 8×130 watts @ 4 ohm, 8×70W @ 8 ohm (RMS), Class-D amplier
nIdeal for installations such as multi-zone applications
nProtection circuits such as thermal, short circuit, on/o muting
nLimiter, Euroblock input and output
nVolume control and mains switch installed on the back
nSignal, clip, protect and power LED
nFrequency response 20 Hz…20 kHz, input impedance 20 k ohm balanced / 10 k ohm
unbalanced
nDimensions: (W × D × H) 483 × 360 × 44 mm, 19-inch rack size (1 RU)
nWeight: 6.6 kg
Sirus I-Amp 8.150
Features
I-Amp 4.500, I-Amp 8.150 11
Power Amplier

4 Installation and starting up
Unpack and check carefully there is no transportation damage before using the unit. Keep the
equipment packaging. To fully protect the product against vibration, dust and moisture during
transportation or storage use the original packaging or your own packaging material suitable
for transport or storage, respectively.
Create all connections while the device is o. Use the shortest possible high-quality cables for
all connections. Take care when running the cables to prevent tripping hazards.
The unit has been designed for rack mounting in a standard 19-inch rack; it occupies one rack
unit.
The input signals are connected to the Euroblock terminals. The supplied sockets are used for
this purpose.
Sirus I-Amp 4.500
nUp to four input signals can be connected to the device (channel terminals [CHA]–[CHD]).
Sirus I-Amp 8.150
nUp to eight input signals can be connected to the device (channel terminals [INPUT1]–
[INPUT8]).
Rack mounting
Input signals
Installation and starting up
12 I-Amp 4.500, I-Amp 8.150
Power Amplier

nTo connect unbalanced input signals, use the [+] and [G] terminals of the respective
channel on the Euroblock.
nTo connect balanced input signals, use the [+], [-] and [G] terminals of the respective
channel on the Euroblock.
The device is equipped with two Euroblock terminals that can be used to connect four (4 Ω) or
two (8 Ω) speaker pairs, depending on the impedance of the speakers. The impedance per
channel must not exceed 2 Ω.
The input signals can be distributed to the connected speaker pairs, depending on the speaker
combination, by selecting a corresponding operating mode.
The device is equipped with nine operating modes that are selected by means of four DIP
switches. Select the required operating mode by setting the DIP switches.
The table below lists the combinations for DIP switches and the corresponding signal distribu‐
tion.
Mode DIP
1
DIP
2
DIP
3
DIP
MT
Explanation
1 OFF OFF OFF OFF [CHA]–[CHD]: Stereo
2 ON OFF OFF OFF [CHA]–[CHD]: Parallel
3 OFF ON OFF OFF [CHA] / [CHB]: Bridged; [CHC] / [CHD]: Bridged
Speaker connection
Sirus I-Amp 4.500: Operating
modes
Installation and starting up
I-Amp 4.500, I-Amp 8.150 13
Power Amplier

Mode DIP
1
DIP
2
DIP
3
DIP
MT
Explanation
4 ON ON OFF OFF [CHA] / [CHB]: Parallel; [CHC] / [CHD]: Parallel
5 OFF OFF ON OFF [CHA] / [CHB]: Stereo; [CHC] / [CHD]: Bridged
6 ON OFF ON OFF [CHA] / [CHB]: Parallel; [CHC] / [CHD]: Bridged
7 OFF ON ON OFF [CHA] / [CHB]: Stereo;
[CHC] / [CHD] / [SUB)]: Bridged; subwoofer mode, signal
input [CHC], lter control [CHA]–[SUB] active
8 ON ON ON OFF [CHA] / [CHB]: Stereo;
[CHC] / [CHD] / [SUB)]: Bridged; subwoofer mode, signal
inputs [CHA] and [CHB], lter control [CHA]–[SUB] active
9 OFF OFF OFF ON Mute amplier stage
Installation and starting up
14 I-Amp 4.500, I-Amp 8.150
Power Amplier

5 Connections and controls
$
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1 Mains switch. Turns the device on and o.
2[SIG] | Indicates the presence of an input signal. The higher the signal level, the faster the LED ashes.
3[CLIP] | Lights up when the channel is overdriven. In this case, reduce the signal level with the channel control until the
LED goes out.
4[PRO] | Lights up when one or more protective circuits have tripped or the device is defective. No sound is output. Make
sure that the vents of the device are free and that good ventilation is possible. Reduce the volume on the device. If the
problem is resolved, the protection circuits are automatically reset and the device is ready for use again.
5 Channel control for input signal gain.
Front of the Sirus I-Amp 4.500
Connections and controls
I-Amp 4.500, I-Amp 8.150 15
Power Amplier

6 Channel LED lights up green when the device is turned on. Channel LED lights up red when test signal priority is enabled
via the [PRI] Euroblock terminal.
7[BRI] | Lights up when the unit is operating in bridged mode.
Connections and controls
16 I-Amp 4.500, I-Amp 8.150
Power Amplier

-
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8[CHA]–[CHD] | Signal inputs, designed as Euroblock terminals
[+] | Balanced or unbalanced signal input (+)
[G] | Ground (GND)
[-] | Balanced signal input (-); remains free in case of unbalanced input signals
[FAIL] | Error status output: +5 V in normal operation; 0 V when a protection circuit trips
[DIS] | Control input for switching o the device; Switching to ground (GND) switches the amplier stage o.
[PRI] | Control input for switching the test signal priority; Switching to ground (GND) enables the test signal on the
[Test] signal output. Channel LEDs light up red.
Back of the Sirus I-Amp 4.500
Connections and controls
I-Amp 4.500, I-Amp 8.150 17
Power Amplier

[GND] | Ground (GND) for audio signal
[GND] | Ground (GND) for control signal
[Test] | Signal output for test signal priority; 0 V in normal operation; +5 V if test signal priority is enabled ([DIS] control
input switched to ground (GND))
9[CHA]–[SUB] | Cut-o frequency for the high-pass lters (CHA A, CHA B) and the low-pass lter (SUB). Control range
reaches from 50 Hz to 250 Hz.
10 [PRE-SET] | DIP switches for selecting the operating mode
11 [SPEAKER OUTPUTS] [CHA]–[CHD]/[SUB] | Euroblock terminals as speaker output. The upper and lower terminal rows
are parallel.
12 IEC chassis plug for power supply with fuse holder. Before connecting to the power supply, check that the voltage
selector on the bottom of the unit is in the correct position.
Should the fuse have blown, disconnect the unit from the power supply and replace the fuse with a new fuse of the
same type.
Connections and controls
18 I-Amp 4.500, I-Amp 8.150
Power Amplier

ö #
1 LED panel
[CLIP] | Lights up when the channel is overdriven. In this case, reduce the signal level with the [INPUT GAIN] control until
the LED goes out.
[SIG] | Indicates the presence of an input signal. The higher the signal level, the faster the LED ashes.
[PRO] | Lights up when one or more protective circuits have tripped or the device is defective. No sound is output. Make
sure that the vents of the device are free and that good ventilation is possible. Reduce the volume on the device. If the
problem is resolved, the protection circuits are automatically reset and the device is ready for use again.
2[POWER] | Lights up when the device is turned on.
Front of the Sirus I-Amp 8.150
Connections and controls
I-Amp 4.500, I-Amp 8.150 19
Power Amplier

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3[OUTPUT] [CH1]–[CH8] | Euroblock terminals as speaker output.
4 Input signal gain control.
5[INPUT1]–[INPUT8] | Signal inputs, designed as Euroblock terminals
n[+] | Balanced or unbalanced signal input (+)
n[G] | Ground (GND)
n[-] | Balanced signal input (-); remains free in case of unbalanced input signals
Back of the Sirus I-Amp 8.150
Connections and controls
20 I-Amp 4.500, I-Amp 8.150
Power Amplier