Stellar Industries SLA250 User's Manual
Contents
1. L R Input 2 Feed through 10 Power On Off Mode Select 4 L R Speaker Level Input 11 Speaker Pair A Output 5 Speaker Input Selector 12 Speaker Pair B Output 6 L R Master Level Control 13 IEC Power Line Cord Input 7 Stereo Bridged Selector 14 115 230VAC Power Selector 1 L R Line Input 1 priority Conventional line level input accepts signal from typical audio sources such as tape or CD players computer sound cards MP3 and similar portable devices television audio outputs or DVD players If this amplifier is to be connected to an existing home theater system to drive remote speakers this input should be connected to the home theater s TAPE or PREAMP output 2 L R Line Input 2 default Conventional line level input accepts signal from typical audio sources such as tape or CD players computer sound cards MP3 and similar portable devices television audio outputs or DVD players If this amplifier is to be connected to an existing home theater system to drive remote speakers this input should be connected to the home theater s TAPE or PREAMP output The amplifier automatically defaults to this input upon power up and will only be active when no Signal is present at the Line 1 Input As soon as a Signal is detected at the Line 1 input the amplifier will automatically switch to the Line 1 Input If silence is detected at the Line 1 Input it will switch back to the Line 2 Input If a signal is present at both in2. blades and a third ground prong The wide blade or third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet Protect the power cord from being stressed at the plugs convenience receptacles and where they exit the amplifier Only use accessories specified by the manufacturer Unplug the device during lightning storms or when unused for an extended time Refer all servicing to qualified personnel This device must not be exposed to water in any way No object filled with liquids should be placed on apparatus Congratulations on your purchase of this Stellar Labs SLA Series Stereo Amplifier This amplifier was designed specifically for use in distributed audio installations where high reliability and premium sound quality are a must Remote on off triggering and signal sensing allow these units to be set up in equipment racks with no further contact required Rear mounted master level controls keep installation safe from future tampering Two auto switching inputs allow automatic operation when used with more than one system This amplifier is warranted from defects for one year from the date of purchase Should your amplifier require service either within or beyond that warranty period please contact your MCM Sales Representative This unit includes a host of features along with an impressive list of specifications which are detailed over the
3. A Amplifier has no line level output such as a television or older stereo system This input is also useful if an existing whole house audio system is in place and it is desired to connect additional zones away from the central system Or if a room is added to an existing system that requires connection of a large high powered pair of speakers or a passive subwoofer This Speaker Level Input can be directed to either Input 1 priority or Input 2 default by use of the selector switch directly above the input 5 Speaker Input Selector Directs the Speaker Level Input to either 1 or 2 When in the 2 position the speaker level input will be provided at line level at the 2 Feed Through Output 6 Master Amplifier Level Control These independent Left Right controls act as the main volume control for this amplifier These are located on the rear to allow the installation contractor to limit the maximum volume level of the system The front panel volume control acts as a trim adjustment relative to the position of these rear controls 7 Stereo Bridged Mono Mode Selector This selector allows the amplifier to act as a stereo two channel amplifier or a single channel mono amplifier with the power of both channels added together This is useful when using the amplifier to drive a passive subwoofer When using the amplifier in bridged mode be certain to e Use speaker loads of 80hm or higher Speakers or combinations of speak
4. Stellar ape Two Channel Contractor Series Power Amplifiers SLA150 SLA250 SLA470 Stellar Labs www stellarlabs com MODEL 75W RMS x Two Channels 125W RMS x Two Channels 235W RMS x Two Channels Distributed Exclusively by MCM Electronics www mcminone com Safety Information CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN The lightning bolt To reduce the risk of electric The exclamation point within a triangle is shock do not remove cover of this within a triangle is intended to alert the device There are no user intended to alert the user to the presence serviceable parts inside Refer user to important of un insulated servicing only to qualified service operating and dangerous voltage personnel maintenance levels within the servicing product s enclosure instructions in the literature This voltage may be of accompanying the sufficient magnitude to appliance constitute an electric shock risk Safety Precautions Read and retain these instructions Follow all instructions and heed warnings Do not use this device near water If the surface becomes dirty clean only with dry cloth do not use solvents or thinners Install in accordance with the manufacturer s instructions Do not block ventilation openings Do not install near heat sources such as radiators heat registers stoves or other devices that produce heat Do not defeat the safety purpose of the grounded plug This plug has two
5. e care when connecting bare speaker wire to ensure that small strands to not short between adjacent terminals Left and right speakers should be connected as normal for stereo operation The B output is not to be used for bridged operation 13 Line Cord Input Fuse Holder This provides a standard IEC type AC power cord connection This removable type cord is convenient in certain installation applications as it allow the power cord to be routed into racks or cabinets at an early stage with connection of the amplifier later A 72 cord is included with each unit exact replacements are available at MCM Electronics or a variety of electronic electrical retailers Fuse Holder Amplifiers are shipped with preinstalled fuses that are the appropriate size for 115VAC operation If the amplifier is to be operated at 230VAC the fuse should be replaced with the proper size Fuses are In the event that that fuse blows only replace with a fuse of the same type and amperage rating MCM Electronics recommends Littelfuse 213 Series miniature 5mm x 20mm Slo Blo replacement fuses 115VAC 230VAC Model Operation Operation SLA150 4A 2A SLA250 6 3A 3 15A SLA470 10A 5A 14 Voltage Input Selector This selector allows use of the amplifier virtually any place in the world The default setting for use in North America is 115V switch in the up position However it is recommended to verify this prior to connecting power Note that improper power s
6. el SLA470 150W RMS per channel both channels driven into an 80hm load 235W RMS per channel both channels driven into a 4ohm load 470W RMS bridged mono into an 8ohm load Power requirements Selectable 115 230VAC 60 50Hz 1200W max Dimensions 5 1 4 H x 16 1 2 W x 14 D Weight 33 Ibs Front Panel Controls Power Provides manual on off control of the amplifier For this control to operate normally the rear Trigger Auto On Normal selector must be in the Normal position If using the Trigger or Auto On mode this switch must remain in the ON position On Standby Indicator Bi color lamp provides immediate indication of the amplifier status With the power switch OFF the lamp is not lit With the power switch ON and Trigger or Auto On in STANDBY mode the lamp is red When the amplifier is manually automatically signal sensing or externally triggered ON the lamp lights blue This allows the user to immediately know the exact status of the amplifier from anywhere in the room A B Speaker Selector Each A and B pushbutton operates independently Pressing the button in will engage the speaker pair for the designated output Pressing again will disengage that output With both pairs on the speaker outputs are parallel Balance This provides trim adjustment between the Left and Right audio channels of the amplifier Note that this is a trim control in that it provides for fine adjustment between the two channels Unli
7. election can cause immediate and permanent damage to the amplifier even if the main power switch is not turned on
8. ers that yield less than 80hms can damage the amplifier Only connect to the A speaker output Be certain to observe proper connections Your signal source should be connected to both Left and Right input channels Master level controls should be set at exactly the same level Front panel balance control should be set at the mid position 8 12V Trigger Input When the Power On Off Mode Selector is in the Trigger position the amplifier can be externally Switched ON and OFF from this input When supplied with 12VDC the amplifier immediately switches on When 12VDC is removed the amplifier immediately switches off This input is a two conductor 3 5mm connector positive tip polarity It should be provided with a 12VDC signal only 9 12V Trigger Output This output provides 12VDC 100mA to control external devices from the ON OFF operation of this amplifier When the amplifier is on 12VDC is immediately present and switches off immediately when the amplifier switches off This follows whether the Auto On 12V Trigger Input or manual ON OFF control are used to turn the amplifier on This allows the amplifiers Auto Power On function to control external devices This output is a two conductor 3 5mm connector positive tip polarity Caution Do not connect loads greater than 100MA to this output 10 Power On Off Mode Select This selector determines how the amplifier will be switched on and off Normal provides completely manual operation f
9. ke conventional balance controls on consumer audio equipment this control will not completely mute the opposing channel even when turned fully clockwise or counterclockwise Volume This provides volume trim adjustment simultaneously for the and right channels Note that the master volume level is set via the recessed Master Level Controls on the rear panel The front panel volume control is intended to provide fine up down adjustment from the preset level This is especially useful in distributed audio applications as it allows the Installer to set the overall amplifier limit while allowing the user only a limited range of adjustment This greatly reduces the risk of speaker and component damage from abuse or tampering after the installation is complete Caution Prior to connecting this unit to AC power Note the following critical information Power Source Selection Locate this switch on the right side of the rear panel directly next to the power cord 115V connection Make sure this switch is in the proper connection prior to connecting power Failure to do so could result in permanent damage to the amplifier and potentially create a hazard even if the amplifier is switched off Fuse Holder 230V Rear Panel Connections Controls Stellar ope Ara alana com MODEL SLAZ50 R L Be I all 1 L R Line Input 1 8 12VDC Trigger Input 2 L R Line Input 2 9 12VDC Trigger Output 3
10. next pages Please take the time to read this document completely prior to installation of this product Should you have questions regarding installation or operation of this unit please contact the MCM Technical Support Department Features Two sets of L R inputs each may be switched to accept line level speaker level signal Auto switching between inputs with adjustable delay Line level pass through output on input 2 Manual or auto sensing power control 12V trigger input allows power on command from external components 12V trigger output allows amplifier to trigger external components Stereo and bridged mono operation Heavy duty binding post speaker outputs Discrete output components Specifications all models THD lt 0 2 at 4ohm Crosstalk lt 65dB 1KHz Frequency Response 20Hz 20KHz 0 5dB S N Ratio gt 100dB Model SLA150 50W RMS per channel both channels driven into an 80hm load 80W RMS per channel both channels driven into a 4ohm load 150W RMS bridged mono into an 8ohm load Power requirements Selectable 115 230VAC 60 50Hz 450W max Dimensions 3 1 2 H x 16 1 2 W x 14 D Weight 21 Ibs Model SLA250 80W RMS per channel both channels driven into an 80hm load 125W RMS per channel both channels driven into a 4ohm load 250W RMS bridged mono into an 8ohm load Power requirements Selectable 115 230VAC 60 50Hz 700W max Dimensions 3 1 2 H x 16 1 2 W x 14 D Weight 26 Ibs Mod
11. puts the Line 1 Input will take precedence over the Line 2 Input The Delay Control will effect length of silence time required to pass prior to switching back to Input 2 This prevents unwanted switching during quiet passages between songs or in movie soundtracks Ideal application of these two inputs is as follows Use the SLA Amplifier to power several zones of speakers throughout the house Connect the Tape output from the Home Theater system to the Line 2 Input When the Theater System is powered on the SLA Amplifier will also power on sending the sound source throughout the home A secondary source such as a remote MP3 player connector iPod docking station or similar could be connected to the Line 1 Input When the portable device is connected to this input and powered on the amplifier will switch to this input and play throughout the home 3 L R Input 2 Feed through Output This output is provided as a convenience feed through from the Line 2 Input What ever source is connected to the Line 2 Input will play through this line level output This is ideal for daisy chaining multiple amplifiers to drive a large number of zones This output is unaffected by the auto switching of the SLA Amplifier as it will always feed from the Line 2 Input 4 Speaker Level Input This input is intended to accept a signal directly from the speaker output of another audio amplifier This can be useful if the audio source feeding the SL
12. rom the front panel Power switch Auto On senses the presence of an input signal at Input 1 or Input 2 Upon the detection of this signal the amplifier turns on immediately After approximately 10 minutes of no signal the amplifier will switch off This mode requires the front panel POWER button to remain in the ON position Trigger allows external ON OFF control of the amplifier through the 12V Trigger Input found immediately to the left of this selector This input looks for a 12VDC signal from an external device to turn this amplifier on and off This mode requires the front panel POWER button to remain in the ON position 11 Speaker A Output This binding post set provides connections for speakers controlled by the A pushbutton on the front panel Speaker Selector These binding posts accept banana plugs spade lugs or bare speaker wire up to 12AWG Use extreme care when connecting bare speaker wire to ensure that small strands to not short between adjacent terminals Left and right speakers should be connected as normal for stereo operation For bridged mono operation the two RED positive terminals only are used See the notation on the back panel for proper connection 12 Speaker B Output This binding post set provides connections for speakers controlled by the B pushbutton on the front panel Speaker Selector These binding posts accept banana plugs spade lugs or bare speaker wire up to 12AWG Use extrem
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