Sonance 93378 User Manual

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IMPORTANT: ALLOWING THE AMPLIFIER TO OPERATE WITH ONE OR

MORE CHANNELS IN PROTECT MODE FOR AN EXTENDED PERIOD OF

TIME CAN DAMAGE THE AMPLIFIER.

Protection Circuitry and LEDs

TheSonampampliershaveamulti-stageprotectionsystemto

preventdamagetoyouramplierandspeakers.

Amplier Channel Protection DSP 2-150 MKII

If a channel encounters a short-circuit (in bridge mode the

protection circuitry will sense a short circuit across both positive

speaker terminals), or extremely low impedance will cause the

aectedchanneloutputstoautomaticallymute.Theoutputof

theaectedchannelwillremainmuteduntilthefaulthasbeen

corrected.Onlytheaectedchannelsoutputwillmute,allother

channels will continue to operate normally.

Amplier Channel Protection Indication DSP 2-150 MKII

OnthefrontpaneloftheSonampDSP2-150MKIIampliersare

dual color LEDs that illuminate to indicate the current operating

statusofeachamplierchannel.

When the LED blinks red this is an indication that the channel is

being over driven.

WhentheLEDlightsaresolidredthisisanindicationtheamplier

is in protect mode. While in protect mode the LED lights will

periodically light green to retest the output to determine if the short

has been removed. Protect mode could be caused by a short in

thewire,overheatingoftheamplierorpossiblyaninternalproblem

withtheamplier.

Iftheampliersensesaverylowimpedanceorashortonits

outputs, then it will mute its output and the protection LEDs will

turn red. The output will remain muted until the fault is cleared.

Check the rear panel block connector for shorted wire strands

or reduce the number of speakers connected in parallel to the

amplieroutputs.Sonanceampliersareratedfora4ohmloador

higher, such as two pair of eight ohm speakers.

Rack Ear Installation DSP 2-150 MKII

The DSP 2-150 MKII ships with two long rack ears for when the

amplieristobeusedaloneina1Uspace.Unscrewthefour

Phillips head screws (M4 x 0.7 pitch x 10mm long) found on each

sideoftheleftandrightforwardsectionofamplier.Usethese

screwstoconnecttheincludedrackearstotheamplier

(see Figure 15).

MKII

Figure15:RackEarInstallationDSP2-150MKII

Side View Right

Front View

Amplier Stacking

The DSP 2-150 MKII is capable of being directly stacked with the

feet removed for use in low to moderate output applications (see

Figure 16). For high-output applications, it is recommended to leave

atleast1Uspacebetweenampliersforincreasedventilation.

Itisnotrecommendedtostackmorethanthreeampliershigh

without spacing.

To place two Sonamp 2-100 or DSP 2-150 MKII in a single rack

unitorder:RackMountBracketforSonamp2-100&DSP2-150

MKII SKU# 93098 (see Figure 17).

MKII

1L 1R

2-100

MKII

Figure16:StackedCongurationDSP2-150MKIIx3

Figure17:RackMountBracketfor2-100&DSP2-150MKII

IMPORTANT: ANY TIME THE PROTECTION CIRCUITS ARE TRIGGERED,

UNPLUG THE AMPLIFIER’S POWER CORD FROM THE WALL OUTLET

BEFORE TROUBLESHOOTING.

Amplier Power Supply Protection DSP 2-150 MKII

Theamplieralsohasprotectionforthepowersupply.Ifthepower

supply heat sink temperature exceeds the design maximum, the

protection circuit will activate, disconnecting all channel outputs.

This is indicated by a blinking light on the front panel power switch.

NOTE: IF SHELF MOUNTING, ATTACH THE FOUR INCLUDED FEET BY

SCREWING THEM INTO THE THREADED OPENINGS ON THE BOTTOM

CHASSIS. NO TOOL IS REQUIRED.

Front View

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Sonance 93378 Sonamp DSP 2-150 MKII Amplifier

User Manual - Page 9