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Related Manuals for Soundstream Reference 705s
Summary of Contents for Soundstream Reference 705s
- Page 1 REFERENCE 705s 5/3 Channel Power Amplifier OWNERS MANUAL AND INSTALLATION GUIDE...
- Page 2 CONGRATULATIONS! You now own the REFERENCE705s Amplifier, the product of an uncompromising design and engineering philosophy. Your 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.
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Page 3: Table Of Contents
TABLE OF CONTENTS Features ... 4 - 5 REFERENCE705s Diagram ... 6 - 7 REFERENCE Power Supply Design ... 8 Setting High Power/High Current ... 9 Selecting Crossover Modes ... 10 Selecting Input Modes ... 11 Setting Coherent Stereo/Bridged Mono ... 12 Wiring (with Diagram) ... -
Page 4: Features
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 only) - Soundstream’s exclusive circuitry permits customization of your amplifier to its particular application—High Current, for ultra-low impedance loads (multiple subwoofers, less than 1 ohm) or High Power, for higher impedance loads (1 ohm and up). -
Page 5: Features
be stable into any impedance, down to 1/2 ohm. Six Dual Discrete Class A Drive Stages - Over six times the drive current of most amps, which guarantees maximum performance into any load. Drive Delay Muted Turn-on/off Circuit - A unique circuit which completely eliminates amplifier-related turn-on/off noises. -
Page 6: Reference705S Diagram
Reference705s... - Page 7 1. Fault LED - Indicates a blown fuse. 2. High Power LED - Indicates amplifier power on in "High Power" mode. 3. High Current LED - Indicates amplifier power on in "High Current" mode. 4. Main Fuse - Main power supply fuse. 5.
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Page 8: Reference Power Supply Design
REFERENCE POWER SUPPLY DESIGN The Reference705s employs an extremely efficient unregulated pulse-width modulated power supply. Like the rest of the REFERENCE amplifiers from Soundstream, the Reference705s is rated at 12 volts but is designed to take advantage of the additional voltage available when the vehicle is running. -
Page 9: Setting High Power/High Current
INSTALLATION STEP 1 HIGH POWER/HIGH CURRENT SWITCH The Reference705s’ subwoofer channel can be switched between “High Power” and “High Current” modes. This allows the Reference705s 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. -
Page 10: Selecting Crossover Modes
INSTALLATION STEP 2 SELECTING THE CROSSOVER MODES The Reference705s incorporates a sophisticated, fully adjustable electronic crossover for each of its two pairs of channels and subwoofer channel. The Reference705s can drive a full system without need of an outboard electronic crossover. Before installing the amplifier, make certain the switches on the bottom are set to the correct positions. -
Page 11: Selecting Input Modes
INSTALLATION STEP 3 SELECTING INPUT MODES The Reference705s can be driven with either one, two, or three pairs of stereo inputs. If your source unit has front and rear outputs, you can take advantage of its fading capability by driving the Reference705s in 5 channel mode with two pairs of inputs. When operated in the 5 channel mode with 2 pairs of inputs, the lowpass subwoofer channel will operate in a non- fading mode—it derives its signal from the front and rear inputs. -
Page 12: Setting Coherent Stereo/Bridged Mono
INSTALLATION STEP 4 COHERENT STEREO™ / BRIDGED MONO The stereo channels of the Reference705s have the ability to operate in either of the following modes: Coherent Stereo with identical left and right stereo channels for maximum fidelity. Bridged Mono for dedicated single channel operation; ideal for using the Reference705s in 3- channel operation. - Page 13 CIRCUIT BREAKERS/FUSES EXTERNAL Like all car audio amplifiers, the Reference705s must be protected with a fuse or circuit breaker located within 18” of the battery. This will prevent a fire in the event of a shorted cable. The value of the circuit breaker or fuse should be between 60 and 80 amps. INTERNAL The Reference705s is fused on its front panel with a 40 amp Maxi-fuse.
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Page 14: Installation And Mounting
INSTALLATION STEP 6 INSTALLATION AND MOUNTING 1. AMPLIFIER LOCATION The Reference705s employs highly efficient circuitry and Soundstream's unique Chassisink design to maintain lower operating temperatures. Additional cooling may be required if the amplifier is located in an area with poor air flow, or when driving especially low impedance loads at extremely high levels. -
Page 15: Level Setting
INSTALLATION STEP 7 The input levels are adjusted by means of the input level controls located on the front of the amplifier. This is a unique dual-stage circuit that adjusts both level and gain. This topology maintains better Signal to Noise ratios even with low output sources. In the ideal situation, all components in the audio system reach maximum undistorted output at the same time. -
Page 16: Crossover Adjustments
INSTALLATION STEP 8 CROSSOVER ADJUSTMENTS In most car audio installations, there is a tendency for a “midbass boom.” Because of their interior dimensions, most cars will resonate or ring at these midbass frequencies. If we design the system so there is less musical information in this region, the final response is very smooth and natural sounding. The Reference705s incorporates a continuously variable staggered asymmetrical electronic crossover. -
Page 17: Lse.q Subwoofer Equalization Circuitry
INSTALLATION STEP 9 LSE.Q amplifier. It is capable of both removing subsonic energy in program material and providing a variable boost at low frequencies. The circuit consists of two controls. One adjusts the frequency of operation, and the other adjusts the range of boost. With both controls adjusted fully counter-clockwise, no boost is applied and the amplifier is flat in response down to 20 Hz. -
Page 18: Sample Systems
SAMPLE SYSTEM #1 2-way front to rear fade with constant bass 4 channels of input 4 channels of 2-way high pass, sub channel in low pass... - Page 19 SAMPLE SYSTEM #2 3-way with midrange bandpass 2 channels of input 2 channels of tweeter high pass, 2 channels of midrange...
- Page 20 SAMPLE SYSTEM #3 3-way with midbass bandpass and subwoofer to midbass/satellite fading 4 channels of input 2 channels of midbass bandpass, 2 channels of high pass, sub channel in low pass (High Current; < 1 Ohm)
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Page 21: Sample Systems
SAMPLE SYSTEM #4 2-way in 3 channel mode with fading bass 4 channels of input 2 channels of bridged high pass, sub channel in low pass... -
Page 22: Protection Circuitry & Troubleshooting
Your Reference705s is protected against both overheating and short circuits by means of the following circuits: Main power supply fuses (Maxi-fuse at 40 amps) Smart Power Supply Thermal Rollback activating at 85°C. A fail-safe thermal protection circuit activating at 95°C. Self-resetting circuit breakers on channels 1,2,3 &... -
Page 23: Service
The Reference705s is protected by a limited warranty. Please read the enclosed warranty card. SATELLITE CHANNELS Stereo Bridged) 12 Volts 50 w x 4 Watts (100 w x 2) < 0.1% Signal to Noise > 100 dB Frequency Response 20 Hz to 20 kHz +/- 0.5 dB Bandwidth 15 Hz to 50 kHz Stereo Separation... - Page 24 SOUNDSTREAM TECHNOLOGIES 120 Blue Ravine Road Folsom lifornia 95630...