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Stereo Integrity SIQ 200.2 Amplifier: Purity and Power in Two Channels The Stereo Integrity SIQ 200.2 brings true high-fidelity audio engineering back to mobile sound systems. Built by audiophiles for the most discerning listeners, this powerful 2-Channel Class A/B amplifier prioritizes signal integrity above all else. Its design features zero filters, zero crossovers, and zero EQ, delivering a full bandwidth signal (5 Hz to 150,000 Hz) that is clean, precise, and uncompromised. This is the foundation for an accurate soundstage and breathtaking sonic detail. Uncompromised Audiophile Construction Every component in the SIQ 200.2 was selected based on its acoustic performance and long-term durability: Output Transistors: Utilizes audiophile-grade TO-3 output transistors for clean, linear power delivery. Internal Circuitry: Features high-quality UPC4570 op-amps, IRFPO64N power supply transistors, and sand cast resistors throughout the construction. Aesthetics: Protected by a thick extruded aluminum chassis with a copper anodized shielded transformer cover to minimize electromagnetic interference, all visible through a large plexiglass viewing window. High Power, Ultra-Low Distortion Performance The SIQ 200.2 delivers robust power with unmatched fidelity, validated by Audio Precision measurements: Rated RMS Power Output (2 Channels): 200W RMS x2 @ 4Ω High Current Output: 400W RMS x2 @ 2Ω Bridged Monoblock Power: 800W RMS x1 @ 4Ω Total Harmonic Distortion (THD): 0.03 % (Exceptional clarity) Signal-to-Noise Ratio (SNR): 92 dB Installation and Specifications Purity Control: Features a discrete gain knob per channel for precise level matching. Connections: Premium Tiffany-style RCA connections accepting inputs up to 16 Volts. Dimensions: Compact size at 14 x 8 x 2 Inches. Current Draw: Maximum current draw of 85.6 amps. The SIQ 200.2 is the ultimate 2-channel solution for audiophiles seeking true, powerful sound reproduction in their vehicle.   Amplifiers Specifications Frequency Response Minimum 5 Hz Frequency Response Maximum 150,000 Hz Signal-to-Noise Ratio (SNR) 92 dB Total Harmonic Distortion (THD) 0.03 % Dimensions (W x H x D) 14 x 8 x 2 Inches Rated RMS power output into all 4 channels at 4 ohm 200 Watts Rated RMS power output into all 4 channels at 2 ohm 400 Watts Bridged RMS power into 2 channels at 4 ohm 800 Watts Power Idle Current Draw 1.3 amps Maximum Current Draw 85.6 amps   Connections RCA Input Maximum 16 Volts

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Stereo Integrity SIQ 200.4 Amplifier: Purity and Power in Two Channels   The Stereo Integrity SIQ 200.4 brings true high-fidelity audio engineering back to mobile sound systems. Built by audiophiles for the most discerning listeners, this powerful 2-Channel Class A/B amplifier prioritizes signal integrity above all else. Its design features zero filters, zero crossovers, and zero EQ, delivering a full bandwidth signal (5 Hz to 150,000 Hz) that is clean, precise, and uncompromised. This is the foundation for an accurate soundstage and breathtaking sonic detail. Uncompromised Audiophile Construction Every component in the SIQ 200.4 was selected based on its acoustic performance and long-term durability: Output Transistors: Utilizes audiophile-grade TO-3 output transistors for clean, linear power delivery. Internal Circuitry: Features high-quality UPC4570 op-amps, IRFPO64N power supply transistors, and sand cast resistors throughout the construction. Aesthetics: Protected by a thick extruded aluminum chassis with a copper anodized shielded transformer cover to minimize electromagnetic interference, all visible through a large plexiglass viewing window. High Power, Ultra-Low Distortion Performance The SIQ 200.4 delivers robust power with unmatched fidelity, validated by Audio Precision measurements: Rated RMS Power Output (2 Channels): 200W RMS x2 @ 4Ω High Current Output: 400W RMS x2 @ 2Ω Bridged Monoblock Power: 800W RMS x1 @ 4Ω Total Harmonic Distortion (THD): 0.03 % (Exceptional clarity) Signal-to-Noise Ratio (SNR): 92 dB Installation and Specifications Purity Control: Features a discrete gain knob per channel for precise level matching. Connections: Premium Tiffany-style RCA connections accepting inputs up to 16 Volts. Dimensions: Compact size at 14 x 8 x 2 Inches. Current Draw: Maximum current draw of 85.6 amps. The SIQ 200.4 is the ultimate 2-channel solution for audiophiles seeking true, powerful sound reproduction in their vehicle.   Amplifiers Specifications Frequency Response Minimum 5 Hz Frequency Response Maximum 150,000 Hz Signal-to-Noise Ratio (SNR) 92 dB Total Harmonic Distortion (THD) 0.03 % Dimensions (W x H x D) 27.25 x 8 x 2 Inches Rated RMS power output into all 4 channels at 4 ohm 200 Watts Rated RMS power output into all 4 channels at 2 ohm 425 Watts Bridged RMS power into 2 channels at 4 ohm 875 Watts Power Idle Current Draw 2.6 amps Maximum Current Draw 176 amps   Connections RCA Input Maximum 16 Volts

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Stereo Integrity SIQ 75.4 Amplifier: Purity at its Finest for Your Soundstage   The Stereo Integrity SIQ 75.4 signals the return of true high-fidelity audio engineering to the mobile sound space. Built by audiophiles for the most discerning listeners, this 4-Channel Class A/B amplifier prioritizes signal integrity above all else. Its core design features zero filters, zero crossovers, and zero EQ, delivering a full bandwidth signal (5 Hz to 150,000 Hz) that is clean, precise, and uncompromised. This is the foundation for an accurate soundstage and breathtaking sonic detail. Uncompromised Audiophile Construction Every component in the SIQ 75.4 was selected for its acoustic performance and durability: Output Transistors: Utilizes audiophile-grade TO-3 output transistors for clean, linear power. Internal Circuitry: Features high-quality UPC4570 op-amps, IRFPO64N power supply transistors, and sand cast resistors throughout. Connections: Equipped with premium Tiffany-style RCA connections accepting inputs up to 16 Volts. Chassis: Protected by a thick extruded aluminum chassis with a copper anodized shielded transformer cover to minimize electromagnetic interference, all visible through a large plexiglass viewing window. Clean Power, Ultra-Low Distortion Performance The SIQ 75.4 delivers precise power with unmatched fidelity, validated by Audio Precision measurements: Rated RMS Power Output (4 Channels): 75W RMS x4 @ 4Ω High Current Output: 120W RMS x4 @ 2Ω Bridged Power: 120W RMS x2 @ 4Ω Total Harmonic Distortion (THD): An ultra-low 0.03 % Signal-to-Noise Ratio (SNR): 90 dB Installation and Specifications Purity Control: Features a discrete gain knob per channel for precise level matching. Dimensions: Compact size at 14 x 8 x 2 Inches. Current Draw: Maximum current draw of 66 amps. The SIQ 75.4 is the ideal solution for audiophiles seeking true sound reproduction for their front and rear stage speakers. Amplifiers Specifications Frequency Response Minimum 5 Hz Frequency Response Maximum 150,000 Hz Signal-to-Noise Ratio (SNR) 90 dB Total Harmonic Distortion (THD) 0.03 % Dimensions (W x H x D) 14 x 8 x 2 Inches Rated RMS power output into all 4 channels at 4 ohm 75 Watts Rated RMS power output into all 4 channels at 2 ohm 120 Watts Bridged RMS power into 2 channels at 4 ohm 120 Watts Power Idle Current Draw 1.2 amps Maximum Current Draw 66 amps   Connections RCA Input Maximum 16 Volts

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Going along with the budget friendly trends in the industry, We decided it was time to play along. Introducing the “Sundown Full Bridge” line of amplifiers, “SFB” for short. These amps pack a huge punch in a fairly small footprint. Due to the full bridge technology, these amplifiers are not strappable however you can line up multiple amps together to create a massive powerhouse in the same, if not smaller, footprint of your standard half bridge predecessors for a fraction of the cost. All of the SFB 4ch amp’s power ratings are listed at the 1ohm rating. For instance, the SFB-500.4 is 500Wrms at 1ohm per channel. This allows you to run many more speakers together in a multitude of different wiring configurations than using a standard Class A/B/D half bridge design. These are the perfect amplifiers for large systems where you have a plethora of pro drivers in multiple doors or line arrays. All SFB mono amplifiers are full range. This not only allows you to run subwoofers as you would most mono amps, but you can also run a large arrays of mids/highs on these amps as well. The crossovers on the mono SFB amps can attenuate from 15hz all the way up to 20khz. This allows you to set bandpass crossover points and dial in whatever frequency you desire for your setup no matter the type of speaker you are using. The SFB series amps are considered to be a “Brazilian Style” of amplifier. This technology is not new and has been around for quite a while however, the use of them has surged dramatically in the past few years. These little amplifiers are known to be the best bang for your buck. If you are looking for raw power on a budget, look no further than the SFB Series from Sundown Audio. Product Manual Features Digital Class-D Mono Block Amplifier Dual MOS-FET PWM Power Supply 1 Ohm Stable Load 12 dB/Octave – Variable Low Pass Filter 12 dB/Octave – Variable High Pass Filter 9 dB/Octave – Variable Bass Boost 4 Way Protection Ciruit (Thermal, Voltage, Speaker Short, DC Offset) Specifications 1 ohm Mono RMS 5000W 2 ohm Mono RMS 3200W 4 ohm Mono RMS 2200W Recommended Fuse Rating 220A x 2 Low Pass Filter (Variable) 80Hz-20kHz High Pass Filter (Variable) 15Hz-80Hz Bass Boost @ 50Hz 0-12dB Input Sensitivity 5V Max S/N Ratio 100dB Working Voltage 10.5v-15.5v Dimensions 9.00" x 11.50" x 2.75"

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