Soundstream Technologies REF2.370, REF4.400, REF1.500 manual

8Balanced Signal Inputs – Using our BLT Balanced Line Transmitters, you can achieve balanced, noise-free signal transfer. This is a MUST and no-brainer for any audiophile, sound quality competitor, or anybody serious about their music.

9CH1&2 Signal Mode – There are two options here for the signal processing. You can either choose CH1&2 HP/FR for High Pass or Full Range operations, or you can choose COPY CH3&4 making channels 1&2 receive the same processing as channels 3&4. This is handy if you want channels 1&2 to be identical to 3&4 or if you need low pass or band pass signal. Understand that this bypasses EVERYTHING so that the front channels are iden- tical to the rear channels.

10Phase Switch – This switch changes the phase of the woofer from 0 to 180 degrees.

11Subsonic – Part of the Hawkins circuit, this is a patented circuit developed by Soundstream many years ago. Haw- kins has 2 controls but 3 functions. One of the controls is the boost and it is from 0-10dB. The second control is the frequency. Whatever frequency you select will be the frequency that is controlled by the adjustable boost. The third function is a tracking subsonic filter. Once the boost frequency is set, all frequencies below that point are blocked to prevent damage to the speakers. For example, your subwoofer starts to lose output at 50Hz. You can set the frequency to 40Hz and boost up to 10dB, but you do not have to worry about super low fre- quencies damaging your speakers because no music material below 40Hz will go to the subwoofers. Or, let’s say your subwoofer plays just fine, but at 20Hz tones it starts to flutter and get distorted. Hawkins can be set at 25Hz and not use the boost, but still take advantage of the subsonic filter subwoofer protection.

12Remote Control – This the port for the Remote Control so you can use the supplied unit to control the gain from the front of the vehicle.

13Input Mode – When in 4CH mode, all 4 channels of signal are required and fadability is in effect. When in 2CH mode, only 2 channels of signal are required and CH1&3 get the same signal, and CH2&4 get the same signal. Fadability is lost in 2CH mode.

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