Astell&Kern SP4000 Copper – The Ultimate Portable Hi-Fi Audio Player

Price: £3,999.00 | Stainless Version £3799
Free Shipping | Authorised Dealer | Limited Stock

Elevate Your Listening with the Ultimate Copper Flagship

The Astell&Kern A&ultima SP4000 Copper Edition is the definitive expression of portable high-resolution audio. Crafted from ultra-pure copper and built around Astell&Kern’s advanced Octa DAC architecture, this limited flagship digital audio player (DAP) is engineered for uncompromising sonic performance, enhanced shielding, and luxurious presence.

Designed for serious audiophiles and collectors, the SP4000 Copper Edition combines studio-grade performance, full Android streaming freedom, and a bold copper chassis that enhances both aesthetics and acoustic integrity.

Key Features at a Glance

True Octa DAC Architecture
Quad AK4499EX DACs paired with dual AK4191 digital modulators for exceptional channel separation and ultra-low noise performance

Ultra-Pure Copper Chassis
High-purity copper body for superior electromagnetic shielding and refined tonal presentation

High Driving Mode
Delivers powerful output for full-size headphones with authority and control

Full Android OS with Google Play Store
Install and stream directly from TIDAL, Qobuz, Apple Music, Spotify and more

Astell&Kern Direct Path (ADP) Technology
Bit-perfect playback by bypassing Android’s sample rate conversion

Snapdragon 6125 + 8GB RAM
Fast, stable performance for streaming, multitasking, and large music libraries

256GB Internal Storage + microSD Expansion
Expandable up to 1.5TB

LDAC, aptX HD, aptX Adaptive & Bluetooth Sink Mode
High-resolution wireless streaming and DAC functionality

6″ Full HD+ Display
2160 × 1080 touchscreen with Astell&Kern’s LP-inspired user interface

Quick Charge 3.0 & USB-C PD Support
Efficient charging for extended listening sessions

Premium Perlinger Leather Case Included
Handcrafted German leather, precision-fit for protection

Copper Engineering for Superior Shielding

The SP4000 Copper Edition features a high-purity copper enclosure that provides enhanced electromagnetic interference (EMI) shielding compared to standard stainless steel variants. Copper’s natural conductivity helps reduce internal noise and interference between digital and analogue stages, contributing to a quieter background and greater perceived depth.

Beyond performance, the copper chassis develops a unique patina over time, giving each unit a distinctive character.

Reference-Grade Sound Performance

The Octa DAC configuration provides true dual-mono separation and remarkable precision.

Performance Highlights:

Signal-to-Noise Ratio: Up to 131 dB
THD+N: As low as 0.0002%
Expansive dynamic range
Ultra-low noise floor
Enhanced micro-detail and spatial imaging

Enhanced Signal Alignment (ESA) optimises timing between digital and analogue stages, while Digital Audio Remaster (DAR) technology upscales lower-resolution files to enhance clarity and refinement.

The result is a rich, authoritative sound signature with exceptional transparency and control.

Streaming Without Compromise

The SP4000 Copper Edition delivers flagship streaming performance while preserving audiophile standards.

Full Google Play Store access
Bit-perfect audio routing via Astell&Kern Direct Path (ADP)
Native sample rate playback
Dual-band Wi-Fi (2.4GHz / 5GHz)
Bluetooth 5.0 with LDAC, aptX HD, aptX Adaptive and Sink mode

Stream directly from major platforms or use the player as a high-end Bluetooth DAC.

Luxury Build & Precision Craftsmanship

Ultra-pure copper chassis
Precision-milled volume wheel with LED illumination
Architectural A&ultima design language
Approx. 615g solid construction for internal stability and resonance control

This is a statement piece built for dedicated listening sessions and reference setups.

Connectivity & Outputs

3.5mm Unbalanced Output
2.5mm Balanced Output
4.4mm Balanced Output
USB-C (charging, data transfer, USB DAC support)
Dual-band Wi-Fi
Bluetooth 5.0

Supports high-resolution audio formats including FLAC, WAV, AIFF, ALAC, AAC, MP3, DSD512 and MQA.

Technical Specifications

DAC Configuration
Quad AK4499EX + Dual AK4191 (Octa DAC circuit)

CPU
Qualcomm Snapdragon 6125 Octa-Core

RAM
8GB LPDDR4

Internal Storage
256GB

Expandable Storage
microSD slot (up to 1.5TB supported)

Display
6″ Full HD+ (2160 × 1080)

Battery
6,780 mAh
Up to 10 hours playback
Qualcomm Quick Charge 3.0 / USB-C Power Delivery

Operating System
Android 11 with Astell&Kern Custom UI

Outputs
3.5mm / 2.5mm / 4.4mm

Weight
Approx. 615g

Dimensions
84.2 × 131.8 × 26.2 mm
(3.31″ × 5.17″ × 1.03″)

Why Choose the SP4000 Copper Edition?

Enhanced EMI shielding for lower noise performance
Reference-grade Octa DAC architecture
Powerful balanced output for demanding headphones
Full Android streaming flexibility
Luxury materials with collector appeal
Limited edition flagship status

What’s in the Box?

• Astell&Kern A&ultima SP4000 Copper Edition Player
• Premium Perlinger Leather Case
• USB-C Charging & Data Cable
• Quick Start Guide
• Warranty Documentation (2-Year Manufacturer Coverage)

The Astell&Kern A&ultima SP4000 Copper Edition is more than a portable music player — it is a flagship reference instrument crafted for those who demand ultimate sound performance, luxury materials, and uncompromising engineering in one extraordinary device.