Soundstream Technologies 405 User Manual

REFERENCE

405

Power Amplifier

OWNERS MANUAL

AND

INSTALLATION GUIDE

SOUNDSTREAM@

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CONGRATULATIONS

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You now own the REFERENCE405 Amplifier, the product of an

uncompromising design and engineering philosophy. Your Soundstream
REFERENCE amplifier will outperform any other amplifier in the world.

between the circuit board and the heatsink in a design called
to ensure cool, efficient amplifier operation.

Staggered Asymmetrical Electronic Crossover - Continuously variable

crossover with 24 dBloctave low pass and 12 dB/octave high pass.

ChassisinkTM

To maximize the performance of your system, we recommend that you
thoroughly acquaint yourself with its capabilities and features. Please retain
this manual and your sales and installation receipts for future reference.

Soundstream amplifiers are the result of American craftsmanship and the
highest quality control standards, and when properly installed, should provide
you with many years of listening pleasure. Should your amplifier ever need
service or replacement due to theft, please record the following information,
which will help protect your investment.

Model and Serial

Dealer’s Name
Date of Purchase
Installation Shop
Installation Date

#

CAUTION!

Prolonged listening at high levels may result in hearing loss.
new Soundstream REFERENCE amplifier sounds better than anything you’ve
ever heard, exercise caution to prevent hearing damage.

Even though your

DESIGN FEATURES

Uncompromising Design and Construction including mil-spec glass
epoxy circuit boards and high current custom gold-plated solid brass
connections that will accept up to 4 gauge power/ground wire.

High Power/High Current Capability (Subwoofer channel)
Soundstream’s exclusive circuit which permits customization of your
amplifier to its particular application--high current, low impedance loads
(multiple subwoofer, 1 ohm or less) or high power, higher impedance loads
(greater than 1 ohm).

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PowerGrid

located near one another, connected by thick, wide PCB traces, which
ensures rapid high current delivery. The entire power supply section is
isolated on one side of the circuit board while the audio stage is located on
the other, guaranteeing minimal noise.

Ultra-Low ESR Capacitance Bank - Multiple small input power capacitors

are used to provide a lower ESR (Equivalent Series Resistance), which
means the capacitors are able to provide more current, faster.

Smart Thermal Rollback Power Supply - Most amplifiers shut off when

they get too hot. In the unlikely event the REFERENCE405 reaches
it will roll back average power output capability (without affecting the
dynamics) until the amp cools off, when full capability is restored. If
overheating should continue, a second thermal sensing protection circuit
will shut off the amplifier if the heatsink reaches

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Unregulated Power Supply - 4 ohm power ratings are measured at 12

volts, which means substantially greater output in the real world when the
vehicle is running, where voltages range from 13.2 to 14.4 volts. Dynamic

capability of the loosely regulated power supply is much greater than that
of a tightly regulated power supply.

Fault Monitor LED on the front panel notifies you of blown power supply
fuses.

112 Ohm Drive Ability - The REFERENCE405 subwoofer channel is
designed to drive nearly any load--all the way down to a

Five Dual Discrete Class A Drive Stages - Over six times the drive

current of most amps, which maintains performance into low impedance
loads.

Drive Delay

completely eliminates any amplifier-related turn-on/off noises.

Power Supply Design - All power supply components are

95OC.

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Ohm load!

TM

Muted Turn-on/off Circuit - A unique circuit which

85OC,

ChassisinkTM

the output section incorporates several output transistors instead of a few
to deliver more power, faster. The transistors are directly sandwiched

Darlington Power Array - Soundstream’s “over-building” of

Flexible Input Sensitivity accepts input voltages from 100 mV to 2.5 V,

which permits maximum output from amplifier with virtually any source unit.

Balanced Input Design for added immunity to noise caused by component

and vehicle electrical system interaction.

2

SYSlEMDIAGRAVI# 1

SYSTEM

DlAGRAM#

2

Channels of input: 4

Bridged

Subwoofer

High

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Channels: none

Channel Impedance: 2 ohms

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Connections

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Current

Ming:

High

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REFERENCE 405

Channels of input: 2
Bridged Channels: none

Subwofer

High

Channel Impedance: 4 ohms

Powrmigh

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Current Setting: High Power

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