Soundstream Technologies 300SX User Manual

l

l

l

l

l

P

Lll

II

cr)

P

LLI

0

a

LLl

0

E

Z

3

Q

0

LLI

n

m

I---

CONGRATULATIONS!

You now own the REFERENCE Amplifier, the product of an
uncompromising design and engineering philosophy. Your

SoLndstream

REFERENCE amplifier will outperform any other amplifier in the world.

To madmize the

pedorrnance

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 01 American craftsmanship and
highest quality control standards, and when

properly

installed

will

the

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

Model

and Serial #

your

investment.

Dealer’s Name

Date of Purchase
Installation Shop

Chassisink”
the

output section incorporates multiple
for faster, stronger power delivery. The transistors
between the circuit board and

Darlington Power Array -

the heatsink

Soundstream’s

outpul

transislors instead of a few

“overbuilding” of

are

sandwiched

in a design called

Chassisir&TM

to ensure cool. efficient amplifier operation.

PowerGrid Power Supply Design -

All

power supply components are
located near one another. connected by thick. wide PCB traces. which
ensures rapid, high current delivery. The entire power supply is isolated on
one side of the

circuit

board while the audio

stage

is located opposite if,

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 more power

Smart

Thermal

In the unlikely event the

in and

auf

faster.

Rollback - Most amplifiers

REFERENCE300sx

shut

off when they get too hot.

amplifier reaches 85” C, it will
gradually roil back its average power (without affecting the dynamics).
Once the amplifier has cooled off, it returns to full power

oulput.

If
overheating should continue, a second thermal sensing protection circuit
will shut off the amplifier if the

heatsink

reaches 95” C.

Unregulated Power Supply 4 ohm power ratings are measured at 12
volts, meaning substantially greater oulpui in the real world when the
vehicle is funning, where voltages range from 13.2 to 14.4 volts.

l

Fautl

Monitor LED - on

the

top panel notifies you of blown power supply

fuses.

l

0e.e

DESIGN FEATURES

. Uncompromising Design and Construction - including

epoxy circuit boards and high

current

custom gold-plated solid brass

connections that will accept up to 4 gauge power/ground wire.

. Hlgh PowerRligh Current CapabIlity - Soundstream’s exclusive circuit

which permits customization of your amplifier to its particular
application-high current, low impedance loads (multiple subwoofers, less
than 2 ohms mono) or High Paver, higher impedance loads (2 ohms mono
and up).

. Coherent

StereoTYIMlxed

Mono - selection for either “pure” stereo

operation or mixed mono for simultaneous stereo and mono.

2

mil-spec

glass

l

l/2

ohm Drlve

virtually any load-all the way down to

l Dual Discrete Class A Drive Stages

most amps, which maintains

l Drive

completely eliminates any amplifier-related

l Flexible hput Sensitivity

penitling

l Differential Balanced input Design

,by

component and vehicle electrical system interaction when using

\Inbalanced

Abiiliy

-The REFERENCE amplifiers are designed to drive

l/2

ohm stereo (1 ohm mono).

.

Over six times the drive current of

DelayTH

Muted

perfomlance

Turn-oWofl

-

accepts voltages from 200 mV to 5.0 V,

into low impedance loads.

Circuit .

A unique circuit which

turn-on/off

noises.

maximum output from the amplifier with virtually any source.

-

for

added

immunity to noise caused

RCA inputs.

3

l

o.0

I

l

eoeo

0 0 0

““.a000

i

123

/-

d

Kev to Caiiouts

Fault LED - Indicates a blown fuse.

0000

I

0

0

\

I

1.
High Power LED - Indicates amplifier power on in “High Power’

2.
mode.
High Current LED - Indicates amplifier power on in “High Current”

3.
mode.

+12V -

4.

5.

6.

7.

0.

9.

IO. Main Fuse-Main power supply fuse.

11. Crossover

12. Amplifier Crossover - Select high pass, low pass or full range

13. Mixed Mono/Stereo/Bridge - Select “Bridge” for bridged mono

14. High Power I High Current Switch - Use HIGH CURRENT for

Connect to a fuse or circuit breaker, then to the batfery’s

positive post.

GND

-

Main ground connection.

the vehicle.

REM - Remote turn-on input from the head unit. Accepts
Speaker Output Connections - Left and right channels.
Input Level - independent Left and Right channel input level
controls.
Inputs - Right and left channel RCA (Differential Balanced ) inputs;
only right channel input is used in “Mono” mode.

value fuse.

S.1.P.s

-Crossover frequency settings for the amplifier.

See page 9 for more details.
amplifier operation.

operation (use right channel input). Select “Stereo” for coherent
stereo operation. Select “Mixed Mono’ for simultaneous stereo
bridged mono operation.

loads at or below 1 ohm stereo (2 ohms mono).
NOT SWITCH WHEN AMPLIFIER IS TURNED ON.

Bolt

to a clean chassis ground in

Heplace

only

with

the same

CAUTION: DO

+lZV.

I

/ :

.

0

SOTlOM

VJEW (PARUALJ

4

0

/

5