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Hi-Fi audio shipped worldwide in 3-5 days via FedEx.

Innovative & User-Friendly Design

Minimal yet powerful—built for audiophiles.

True Studio-Grade Sound

Crystal-clear Hi-Res audio with LDAC and ESS DAC.

Crafted to Perfection in Korea

Precision engineering. Premium components. 100% Made in Korea.

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SLASH4

Name: SLASH4
Brand: DO
Price: 109.0 USD
Availability: InStock
Rating: 4.7 (26 reviews)

$109.00 USD

~~$109.00 USD~~ $109.00 USD

Free Worldwide Shipping via FedEx (3-5 Business Days)

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In Stock

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SLASH4

$109.00 USD

~~$109.00 USD~~ $109.00 USD

Product variants

Slash4 Hi-Fi Bluetooth DAC & Headphone Amp – ESS Quad DAC ES9219, LDAC/aptX Adaptive, Optical Output – Upgrades Car/Home Audio to High-Res Studio Quality

11 Years of Excellence in Audio | SLASH

1-Year International Warranty & Dedicated Support

Zero-Clutter Upgrade, Instant Connection

Pure Sound, Zero Hissing

Eliminates ground loop hum. Enjoy instant pairing and distortion-free audio.

Ultimate Portable Hi-Fi, ESS Quad DAC Technology

Studio Sound, Anywhere: 32-bit/384kHz Audio

Connect headphones via 3.5mm or home amps via Optical Out for studio-quality sound anywhere.

Hi-Fi Headphone, 3.5mm Headphone DAC

Your headphones can sound this good.

Plug into adapter or power bank, pair SL4, and play. Experience high-resolution headphone sound.

Optical Output, Connect to Amp or Car DSP

High-Res Audio via Optical Connection

Connect to your amp or DSP via mini-TOSLINK optical out. Pair Bluetooth for stunning high-res audio.

Hi-Fi Bluetooth Stream, Wireless Studio Quality

Stream Any Service in High Definition

Enjoy Spotify, Tidal, and more with premium Bluetooth quality. Crystal clear, dynamic sound.

Seamless Connectivity, Smart Auto-Reconnect

Instant Pairing, Ready to Play

Automatically connects to the last paired device the moment you enter. No setup required, just music.

Universal Codecs, For Android & iPhone

Supports All Major High-Res Codecs

Automatically detects and selects the optimal codec for high-resolution sound.

Pure Audio, Total Noise Isolation

ADVANCED Isolated DC/DC: Zero Ground Loop Noise

Isolated grounds block all hum and noise. Enjoy pure, high-end silence with no audio loss.

Premium Audio Solution, Pure Sound, No Distortion

Unrivaled Immersion, Core Hi-Fi Audio Tech

TI's OPA1692 delivers precise, original sound with ultra-low noise and zero distortion.

Bluetooth DAC, Beyond Hi-Fi

Qualcomm & ESS: The Pinnacle of Audio Performance

QCC5125 & ESS 9219, perfected by SLASH's proprietary circuit design. Delivering ultimate synergy.

LDO & LPF Tech, Immaculate Power & Signal

Double Filtering for Absolute Silence

LDO stabilizes power, LPF cleans signals. Discover pure audio with zero noise.

About this item

[TRUE HI-FI UPGRADE WITH ESS QUAD DAC] – Unlike generic receivers, Slash4 features the premium ES9219 DAC. It transforms standard car audio into a high-fidelity system, delivering wider soundstage and richer detail (24-bit/96kHz) that cheap dongles cannot match.
[SILENCE IS GOLDEN: NOISE ELIMINATION] – Stop suffering from alternator whine and hissing sounds. Our advanced LDO regulator and isolation technology physically block power noise, ensuring a pitch-black background for pure music enjoyment.
[TOP-TIER HIGH-RES WIRELESS] – Fully supports LDAC, aptX Adaptive, aptX HD, and AAC. Experience lossless, CD-quality streaming from both Android and iOS devices with superior connection stability and minimal lag.
[OPTICAL OUTPUT & HEADPHONE AMP] – Features a unique Optical Output for interference-free digital connection to home DSPs/Amps. Also functions as a powerful portable DAC to drive high-impedance wired headphones directly.
[DEDICATED CONNECTION FOR PURITY] – Deliberately designed for single-device pairing. Slash4 prioritizes maximum bandwidth and stability for High-Res audio transmission, eliminating the signal degradation often caused by multi-point connections.

Product Components

Dimensions	0.82"D x 2.83"W x 0.51"H (22mm x 72mm x13mm)
Advanced Noise Isolation	Blocks unwanted power noise for pure, uninterrupted audio in cars and homes.
Optical Output Support	Connects seamlessly to amplifiers and speaker systems for high-fidelity sound.
Powerful Headphone Amp	3.5mm Headphone Amp for Dynamic & Balanced Sound
LDO Noise Reduction	PCB design minimizes background noise for crystal-clear audio.
High-Performance Op-Amp	OPA1692 op-amp delivers precise sound with minimal distortion.

Hi-Res Bluetooth Audio	Features QCC5125 + ES9219 Quad DAC for premium wireless audio.
High-Resolution Streaming	LDAC, aptX HD, aptX Adaptive & More (24-bit Hi-Res)
Seamless Auto-Reconnect	Instantly reconnects to your last paired device for hassle-free playback.
LPF Noise Filtering	Removes unwanted noise for a clean and uninterrupted listening experience.
USB-A Power Supply	Provides stable and reliable power via USB-A.
Wireless Range	Stable Bluetooth Connection (Up to 15m/50ft)
Package Contents	Includes Slash4 Body, 3.5mm Cable, and User Manual.
Plug & Play for Car Audio	Plug into AUX, and it auto-reconnects when the engine starts.

Home Audio with Optical Input	Streams Hi-Res Bluetooth audio directly to your home system.

Our Premium Quality Audio Philosophy

We are committed to delivering the best Bluetooth audio quality by incorporating 11 years of real-world feedback from Slash customers. Our products are developed in collaboration with audio engineers who have over 20 years of experience and award-winning product designers. Crafted by these experts in Korea, the Slash series is a true reflection of premium audio mastery. You can enjoy it with complete confidence—100% made in Korea.

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SLASH4

Slash4 Hi-Fi Bluetooth DAC & Headphone Amp – ESS Quad DAC ES9219, LDAC/aptX Adaptive, Optical Output – Upgrades Car/Home Audio to High-Res Studio Quality