4-channel Stereo AmplifierModel: XM-GS4High-Resolution Audio compatibleUp to 100 kHz frequency range70 W x 4 RMS rated power outputPremium components for superior performanceLow and high pass filters for accurate sound4 Channel Stereo Power AmplifierThe XM-GS4 4-channel amplifier is engineered to enhance every track-including High-Resolution Audio files-thanks to an ultra-wide frequency range that extends up to 100 kHz. A range of premium circuit components work together for ultimate efficiency and pitch-perfect sound reproduction, so you can give every road trip the soundtrack it deserves.High-Resolution Audio for uncompromising soundExperience digital music to the fullest with High-Resolution Audio. By capturing music at a higher rate than CD, increasing both audio samples per second and the bitrate accuracy of each sample, High-Resolution Audio offers an uncompromised rendition of an artist's music. Savor every breath and subtle movement for a truly emotional experience.Ultra-wide frequency response for full-range soundThe XM-GS4's wideband frequency range-ranging from 10 Hz to 100 kHz-is designed for today's broad variety of music styles. The lower end of the frequency range offers more than enough latitude for even the deepest sub-bass notes. At the high-end, you'll be able to feel subtle sub-harmonies, giving your music more life and realism.4 channels create a versatile sound stageWith a 70 W x 4 RMS power output, this 4-channel stereo amplifier gives you a broader range of options as to how you set up your in-car sound. Using bi-amplification, you can separate bass frequencies from highs or ultra-highs, eliminating distortion that occurs when they play through the same channel. You can also independently adjust the volume of different frequencies to find the perfect balance for each song.Schottky-barrier diodes for smooth, stable soundConventional diodes have a voltage drop of between 0.6 and 1.7 V, whilst Schottky-barrier diodes tend to have a maximum drop of 0.45 V. This means that they can deliver faster switching and high-efficiency operation, so you'll enjoy consistently stable power without noise from internal interference.MOS FET transistor for efficient power deliveryThe metal-oxide-semiconductor field-effect transistor (MOS FET) is engineered to deliver a high output from a low-current input. This allows it to provide power to the amplifier's circuits quickly and efficiently, for more responsive operation.Dedicated control section for fine-tuned audioThe amplifier's control section, located just under the external cover, provides users with the ability to manually adjust aspects of their in-car sound - including resistance and the level of power flowing through each individual component. The XM-GS4's carefully selected components are highly reliable and noise-resistant, minimizing unwanted distortion. The twisted wire structures help to further cancel in-car noise, providing a cleaner overall sound.Aluminum case absorbs external vibrationsThe heavy duty, heat sink integrated aluminum body of this amplifier is designed to prevent external vibrations, for jitter-free sound that stays true to the source. SPECIFICATIONS Details Bass Boost: Frequency (0 - 10 dB) 40 Hz, 0–10 dB Current drain (A) - rated output power at 4 ohm 33 A Gold Plated Connectors Yes Line In: Input Sensitivity 0.3–6 Load Capability (ohm) 2 ohm (Yes) MOSFET Power supply (Yes) Speaker Level Input Yes Subsonic High Pass Filter Yes CTA Power output 70 W x 4 CTA SN Ratio 93 dBA Amplifier Channel Configuration 4ch/3ch/2ch High Pass Filter 50–300 Hz (Variable) High-Pass Filter Slope 12 dB/oct Low Pass Filter 50–300 Hz (Variable) Low-Pass Filter Slope 12 dB/oct Size & Weight Dimensions (W x H x D) 272 x 51 x 202 Weight 5.95 lb General Features Frequency Response 10-100 kHz Signal to Noise Ratio 100 dB Tolerance +0.5/-3 dB Total Harmonic Distortion at 1 kHz (%) 0.05% Rated Output Power, RMS 20 - 20000 Hz Max. Channel Configuration at 2 ohm (W) / THD (%) 80 W x 4/1.0% (1 kHz) Max. Channel Configuration at 4 ohm (W) / THD (%) 160 W x 2/ 1.0% (1 kHz) Maximum Output Power (1 kHz) Max. Channel Configuration at 4 ohms BTL (Bridge-Tied Load) 350 W x 2 Max. Channel Power Configuration at 2 ohms 175 W x 4 Max. Channel Power Configuration at 4 ohm 150 W x 4