Sony XM-4ES | Mobile ES 4-Channel Power Amplifier
Product Overview
The Sony XM-4ES is an audiophile-grade 4-channel Class D amplifier from Sony's flagship Mobile ES™ Series. Designed to deliver uncompromising clarity and dynamic power, the XM-4ES is engineered with High-Resolution Audio compatibility to reproduce high frequencies up to 40 kHz with ultra-low distortion.
Clean Power & Audiophile Circuitry
Outputting a robust 100 Watts RMS x 4 at 4 Ohms (or 165 Watts RMS x 4 at 2 Ohms), this amplifier provides massive headroom for front/rear speaker upgrades. It is fully bridgeable to 330 Watts RMS x 2 at 4 Ohms, making it versatile enough to drive high-power component sets or a pair of subwoofers. It features independent ground circuits for the Class D stage and power block, oxygen-free copper (OFC) inductors, and high-capacity electrolytic capacitors to ensure precise, punchy bass and crystalline highs.
Seamless Factory Integration & Signal Summing
Integrating with complex factory sound systems is effortless thanks to the XM-4ES’s built-in signal summing feature. Modern OEM radios often split active crossover signals into separate tweeters, woofers, and mid-bass drivers. The XM-4ES automatically combines these separate factory signals back into a clean, full-range stereo signal.
Structural Integrity & Logical Controls
Built on a heavy-duty chassis with a $1.2\text{ mm}$ bottom plate and cross-braced press structure, chassis rigidity is increased by roughly 50%, shifting resonance away from harsh vehicle vibration frequencies. Solid gold-plated hex-key terminals accommodate up to 8 AWG speaker wire for maximum current transfer and reliability.
Sony XM-4ES Amplifier
CHANNEL CONFIGURATION
4-ch/3-ch/2-ch
HIGH PASS FILTER
Variable (500–5 kHz)
HIGH PASS FILTER SLOPE
12 dB/oct
LOW PASS FILTER
Variable (50–500 Hz)
LOW-PASS FILTER SLOPE
12 dB/oct + 24 dB/oct
Rated Output Power (14.4 V)
- 4 OHMS
- 100 W x4 at 1 kHz, 1% THD
- 4 OHMS - BTL (BRIDGE-TIED LOAD)
- 330 W x2 BTL at 1 kHz, 1% THD
- 2 OHMS
- 165 W x4 at 1 kHz, 1% THD
FREQUENCY RESPONSE
- 10 Hz–40 kHz
- TOLERANCE
- +0.5/-3 dB
TOTAL HARMONIC DISTORTION AT 1 KHZ (%)
Less than 0.05%
Details
CTA POWER OUTPUT
100 W x4
MOSFET
Yes (Power Supply)
SPEAKER LEVEL INPUT
Yes
GOLD PLATED CONNECTORS
Yes
Frequently Asked Questions (FAQ)
Q: What is the benefit of "Signal Summing" on the Sony XM-4ES?
A: Many modern factory car audio systems send pre-filtered signals (e.g., treble-only to dash tweeters and bass-only to door woofers). The XM-4ES signal summing feature takes those multiple split factory inputs and combines them back into a single full-range stereo audio signal, saving you from needing an expensive external line output converter (LOC) or DSP.
Q: Is this amplifier suitable for High-Resolution Audio playback?
A: Yes. The XM-4ES meets official High-Res Audio standards with an ultra-wide frequency response extending to 40,000 Hz. When paired with high-res audio sources and high-end component speakers, it renders intricate harmonic textures and instrument separation beyond standard CD quality.
Q: What gauge wire is recommended for powering the Sony XM-4ES?
A: A quality 4 AWG copper power and ground wiring kit is recommended for installation, along with an $80\text{A}$ inline fuse near the vehicle's battery.
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