Protection Circuitry; Specifications - Soundstream Reference Series 644S Installation Manual

CONGRATULATIONS!
You now own the REFERENCE644s Amplifier, the product of an
uncompromising design and
Soundstream REFERENCE amplifier will outperform any other
amplifier in the world.
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, will
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. Even
though your new Soundstream REFERENCE644s amplifier sounds
better than anything you've ever heard, exercise caution to prevent
hearing damage.
engineering philosophy.
2
Your REFERENCE644s amplifier is protected against both overheating and
Your
short circuits by means of the following circuits:
Main power supply fuses
Auto High Current™ power supply
Smart Power Supply Thermal Rollback activating at 85°C
A fail-safe thermal protection circuit activating at 95°C
Your amplifier also incorporates an innovative Fault Diagnosis system that
NOTE: If you experience blown main power supply fuses, it is likely that the
amplifier is seeing a dead short, either in the speaker wire or in the speaker
itself. Rectify the problem before blowing multiple fuses! DO NOT increase
values beyond the original fuse value! Doing so will void your warranty and
POWER
Watts
THD
Signal to Noise
Frequency Response
Stereo Separation
Damping
Input Sensitivity
Input Impedance
Crossover Output
Crossover Specifications
Low Pass: 30 - 120 Hz at 24 dB/Octave
High Pass: 60 - 240 Hz at 12 dB/Octave
Dimensions (W x D x H)
REFERENCE644s: 16.5" x 9.8" x 2.25"

PROTECTION CIRCUITRY

SPECIFICATIONS

4 Stereo 2 Stereo 1
(8 Bridged) (4 Bridged) (2
(12 Vdc)
75 x 4 150 x 4 160 x 4
(150 x 2) (300 x 2) (320 x 2)
<0.1%
>100 dB
20 Hz to 20 kHz
>90 dB
>200
200mV - 2.0V, or 500mV to 5.0V
10K ohms
340 mV output w/ 200 mV input (+4.5
dB)
23
Stereo 1/2 Stereo
Bridged) (1 Bridged)
160 x 4
(320 x 2)
0.5 dB