7
INSTALLATION STEP 1
SETTING THE
HIGH POWER/HIGH CURRENT SWITCH
(applies to subwoofer channel only)
The Reference705’s subwoofer channel can be switched between “High Power” and “High Current” modes.
This allows the Reference705 to maximize power and efficiency at impedances ≥1 Ohm in “High Power”
mode, or down to 1/2 Ohm in “High Current” mode.
The circuit operates by selecting a set of power supply voltage rails best suited to your particular application.
One is a higher voltage “tap” optimized for high impedance applications while the other is lower voltage
designed to provide more current. Unlike other amplifiers, Soundstream’s REFERENCE amplifiers can be
configured to drive virtually any impedance and make maximum power!
To determine the setting for your application, follow the chart below:
4 Ω
12 Volts
2 ΩΩ
14.4 Volts
1 Ω
14.4 Volts
1/2 Ω
14.4 Volts
High Power
Watts
200
300 400 n/a
High Current
Watts
100 200 300 400
OTHER COMMENTS:
If you blow fuses with your Reference705, switch to the High Current mode. If
the problem persists, 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!
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