Soundstream Technologies 644s, 414s Installation Step, Auto High Currenttm Power Supply

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AUTO HIGH CURRENTTM POWER SUPPLY

The REFERENCE amplifier employs an extremely efficient Auto High CorrwP power supply (patent pending). This power supply circuitry automatically customizes your amplifier for optimum efficiency and power output into virtually any impedance load. When other brand amplifiers are driven at low impedances (i.e., 1 ohm or less). they shut down, squash dynamics and power output (called current limiting). or waste huge amounts of power (i.e., low efficiency). All of which reduce the “real world” power the amplifier can produce in the car. Soundstream’s Auto H;gh CurrentT” power supply allows the REFERENCE amplifiers to be one of two types of amps: either producing maximum power at higher impedances (perfect for satellites) or at lower impedances (usually with multiple subwoofers). This is done by letting the amplifier’s power supply continuously monitor the impedance of the load the amplifier is driving. If the impedance drops too low, the power supply will automatically switch into High Current mode. It will stay in this mode until the amplifier is turned off. The next time it is powered up, it will be in the High Power mode.

Unlike other amplifiers, Soundstream’s REFERENCE amplifiers can be configured to drive virtually any impedance and make maximum power! The major advantages of this power supply are:

•awesome dynamic power capabilities

•added continuous power with higher voltages

•increased amplifier efficiency and reliability

Because of the dynamic properties of most music; all audio components should be able to react accordingly. Thanks to their unique power supplies, the REFERENCE amplifiers can comfortably exceed their rated power for dynamic portions of the music.

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4 INSTALLATION STEP 1 1.

COHERENT STEREOTM /

MIXED-MONO / BRlDGED MONO

The REFERENCE amplifier has the ability to operate in any one of the following modes:

Coherent SiereOrM with identical left and right stereo channels for maximum fidelity. Best choice for satellite speakers. Use this mode unless Mixed-Mono is necessary.

Mixed-Monoin order to drive stereo and mono simultaneously; works well for center channels. It can be used anytime you need a summed mono channel. Somewhat sacrifices sonic accuracy as additional circuitry is introduced lo one channel. In Mixed-Mono, the left channel is inverted, see diagram below or

on the bottom of the amplifier.

Bridged MOllO for dedicated single channel operation; ideal for driving

subwoofers. It is also used when large amounts of power are necessary for single speakers. In bridged mono, on/vthe right channel inwt is active.

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COHERENT STEREO	BRIDGED MONO
+L. _R.	*L- -R+

1~Infocibudged mono, only the right channel input is active.

NOTE: If you intend to dfive a REFERENCE amp in mono but have stereo outputs from your crossover or source unit, you can pot the switch in Mixed-Mono but follow the normal wiring for Bridged Mono.

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