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Astell&Kern - A&ultima SP4000 – High-end Flagship Digital Audio Player – Black
£3,799.00
✓ 1 Year Warranty included
✓ Authorised UK Dealer
The Astell&Kern A&ultima SP4000 is a flagship high-end digital audio player engineered for uncompromising portable hi-fi performance. Featuring advanced audio architecture, high-resolution playback, and premium craftsmanship, it delivers extraordinary clarity, detail, and musical realism, allowing audiophiles to enjoy a truly immersive listening experience wherever they go.
Reference-Grade Sound Without Compromise
The Astell&Kern A&ultima SP4000 is designed for listeners who demand the very best in portable high-fidelity audio. Delivering exceptional clarity, dynamic range, and detail retrieval, it reveals every nuance of your favourite recordings with remarkable precision. Whether enjoying high-resolution albums or studio master recordings, it creates an immersive listening experience that faithfully captures the emotion and energy of every performance.
Advanced Audio Technology for Pure Musical Performance
Built with cutting-edge digital audio engineering, the A&ultima SP4000 is engineered to preserve the integrity of every recording. Its sophisticated circuitry and premium components minimise noise and distortion while maximising sonic purity and accuracy. From delicate acoustic performances to powerful orchestral arrangements, every track is reproduced with stunning realism, providing an authentic listening experience worthy of its flagship status.
Luxury Craftsmanship for Listening Anywhere
The A&ultima SP4000 combines reference-level audio performance with exquisite design and premium materials. Its elegant construction and refined finish make it as visually impressive as it is sonically capable. Designed for audiophiles who want exceptional sound wherever they are, this flagship portable music player seamlessly blends luxury, portability, and uncompromising high-resolution audio performance into one extraordinary device.
Included in the Box: 1× Astell&Kern A&ultima SP4000 player, 1× High-End Shrunken Calfskin Case, 1× USB-C to USB-C cable (1 metre), 3× screen protectors, 1× Quick start guide
Model: SP4000
Body Color: Black, Silver
Body Material: Stainless Steel 904L
Display: 6inch 2K (2160 × 1080) touch screen
Supported Audio Formats: WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF, MQA
Sample Rate: PCM: 8kHz ~ 768kHz (8/16/24/32 bits per Sample) │ DSD Native: DSD64 (1bit 2.8MHz) Stereo / DSD128 (1bit 5.6MHz) Stereo / DSD256 (1bit 11.2MHz) Stereo / DSD512 (1bit 22.4MHz) Stereo
Output Level: Unbalanced 4.1Vrms │ Balanced 8.2Vrms (Condition No Load)
CPU: Octa-core
DAC: AKM4191 ×4 + AKM4499EX ×4 (Real Quad DAC)
Decoding: Support up to 32bit / 768kHz Bit to Bit playback
Input: USB Type-C input (for charging & PC & MAC)
Outputs: Unbalanced Out (3.5mm), Optical Out (3.5mm), Balanced Out (2.5mm, only 4-pole supported | 4.4mm, only 5-pole supported)
Wi-Fi: 802.11 a/b/g/n/ac (2.4/5GHz)
Bluetooth: V5.0 (A2DP, AVRCP, Qualcomm® aptX™ HD, LDAC, LHDC, SBC, AAC)
Dimensions: 85mm (W) × 149.8mm (H) × 19.5mm (D)
Weight: About 21.7oz (615g)
Feature Enhancements: Firmware upgrade supported (OTA: Over-The-Air)
Frequency Response: ±0.006dB (20Hz~20kHz) Unbalanced │ ±0.006dB (20Hz~20kHz) Balanced │ ±0.06dB (20Hz~70kHz) Unbalanced │ ±0.06dB (20Hz~70kHz) Balanced
Signal to Noise Ratio: 129dB @ 1kHz, Unbalanced │ 131dB @ 1kHz, Balanced
Crosstalk: -136dB @ 1kHz, Unbalanced │ -145dB @ 1kHz, Balanced
THD+N: 0.0005% @ 1kHz, Unbalanced │ 0.0003% @ 1kHz, Balanced
IMD SMPTE: 0.0004% 800Hz 10kHz (4:1) Unbalanced │ Balanced
Output Impedance: Unbalanced Out 3.5mm (0.7Ω) │ Balanced Out 4.4mm (1.7Ω)
Clock Jitter: 25ps (Typ)
Reference Clock Jitter: 200 Femto Seconds
Battery Capacity: 6,780mAh 3.8V Li-Polymer
Continuous Playback Time: About 10 hours (Standard: FLAC, 16bit, 44.1kHz, Vol.50, LCD Off)
Charge Time: About 4 hours (QC3.0 Charging)
Built-in Memory: 256GB (NAND)
External Memory: microSD (Max. 2TB) ×1
Supported OS: Windows 10, 11 (32/64bit), macOS X 10.7
How will you send my item?
We ship to addresses within the UK using Royal Mail and DPD couriers.
How much does delivery cost?
Standard 2–3 working day delivery is FREE on orders over £50. Next working day delivery is available from £5.99, and is FREE on orders over £200.
For orders to UK non-mainland and international destinations, additional charges will apply at checkout. Please see below for more information.
How long does delivery take?
Depending on the delivery service you choose, delivery usually takes between 1-4 working days to mainland UK from the moment we despatch your order. Orders to UK non-mainland and international destinations can take longer.
When will you despatch my order?
Orders placed before 3pm are processed and despatched the same day (excluding bank holidays and weekends). Orders placed on weekends will be processed and despatched the following working day.
*Please note that international orders may require extra checks before we are able to despatch your order so timescales may vary.
Can I track my delivery?
Yes - Order tracking is offered as standard on all items, whether they are shipped via DPD or Royal Mail. You will receive your tracking information via email once we have despatched your order.
UK Non-mainland and International destinations.
Post Brexit some of our delivery partners have changed the way we ship to international and offshore destinations. This means that the cost of shipping to some locations has increased significantly and additional paperwork may need to be completed for some international orders.
Shipping for all items to UK Non-Mainland and International destinations will incur a charge at checkout. This charge is not final and additional postage may be required. Furthermore, this may incur additional delivery delays and also local customs charges which the buyer is responsible to pay.
Shipping to international destinations may require further security checks and I.D. to be provided by the cardholder. We reserve the right to cancel any orders where an order does not pass our security checks or the additional postage is not paid.
To avoid any confusion we would advise that you contact us before making your order.
What do you class as UK Non-mainland?
Rep. Ireland, N. Ireland, Channel Islands, Jersey, Guernsey, Isle of Wight, Isle of Man and Scottish Highlands. If you are unsure whether your address is classed as UK Non-mainland please feel free to contact us and an advisor will be happy to help.
For any further enquiries with regards to your delivery please contact us on 020 8561 9845 and one of our adviser's will be happy to help.
If you're not happy with your item or you've changed your mind.
Even though we're sure you'll be happy with your purchase, it's important that you are aware of how we deal with returns in the event that you need to send something back.
We understand how inconvenient it can be when you buy a product and aren't 100% satisfied with it. For this reason we have designed our returns policy to prevent any further inconvenience to you in these instances.
Under 30 days
- You can return your goods for a full refund or exchange as long as you inform us of your intention to return the goods within 30 days of receipt, starting from the day after you receive your goods (Exclusions apply, see below.)
- All return costs are down to the buyer and it is recommended that you return your items using a trackable method with appropriate insurance (if required).
- Once we have confirmed your return, please ensure that you return the item within 14 days.
- If a returns number is provided then please ensure that the parcel has this clearly marked.
- Items need to be returned in "as new" condition in their original packaging. We don't mind if you open the product to check it, however any used or damaged products will be subject to a 25% handling fee so please take care when opening your items.
After 30 days
- We will not offer a refund after 30 days of you receiving your delivery unless your product is faulty.
Exclusions from our returns policy
As we're sure you'll understand, there are some products that we can't offer returns on due to their nature. These include:
- Special order items and cables cut from a reel (priced per metre). These items will be clearly identifiable.
- In-Ear headphones due to health and hygiene reasons.
- Products that include software which require activation.
Please note : that these exclusions do not apply to items that become faulty.
If your product becomes faulty
We endeavour to get your items to you in fully working order, however in the event that your items do become faulty, please read below on what you should do next.
In a lot of cases with some products, faults can be fixed by performing some basic troubleshooting, so to prevent any further inconvenience to you we advise that you contact our Customer Service team who can guide you through some basic troubleshooting before sending items back.
Under 30 days
- If your items become faulty within 30 days of delivery you are entitled to a full refund or exchange. Please contact our customer service centre who will provide necessary returns details.
- Please send the items back with a cover note including a description of the fault and your original order number.
- Once we have fully tested the item and confirmed the fault, we will process the refund or exchange including cost of carriage back to us (within reason).
- If during our testing we cannot find a fault, no refund will be given and you will be charged for delivery of the item back to you.
After 30 days
- After 30 days you will still be able to get your faulty items repaired or replaced within the manufacturers warranty and we will be happy to assist you with this. Please contact our customer service team to find out the best way to get your items repaired or replaced. Please be aware that after 30 days we will not cover you for any carriage costs.
