Denon AH-MM400 Headphones

Denon AH-MM400 Headphones

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The AH-MM400 from Denon is the company's flagship headphone model, designed and constructed to reflect the company's dedicated to retaining the musical integrity of every source. They're professionally tuned for a flat EQ, in order to deliver a reference level standard of natural tonal balance, resulting in an unflavoured and totally true sound that reflects the nature of the original musical performance. 

The earcups are comprised of hand-carved and natural American walnut, acting as a high quality, anti resonant cabinet for the componentry within. The over-ear design allows for long listening periods, and also offers a better level of passive acoustic isolation, meaning that you're less likely to be disturbed by environmental noise and interference. 

These earcup housings are attached a lightweight and adjustable headband, connected by aluminium alloy die-cast hangers. These hangers utilise a resonance-free construction, and are highly rigid to ensure a durable result. They're also collapsible, allowing them to be placed into the supplied carrying pouch for optimal portability. 

The drivers themselves are 40mm in size, and are built with carbon/paper composite blent diaphragms, connected to high quality neodymium magnets - enhanced even further using Denon's specific Free Edge technology, allowing the headphone to extend its frequency response up to 40kHz.



 Weight  310 g
 Driver diameter 40mm 
 Driver type Dynamic
diaphragm + Free Edge) 
Sensitivity   32 ohm
Maximum power input   96 dB/mW
 Maximum power inpu 1000mW 
 Frequency response 10-40,000 (Hz)  

Providing your item is in stock, the order is usually dispatched within 24 hours. Please remember that postage and packing is completely free for orders over £50*. Out of stock items will be dispatched as soon as they become available, out of stock items can take between 4 to 21 days for dispatch.

Deliveries usually take 1-3 working days. The majority of orders are sent via our couriers'; Interlink Express on a next-day-delivery service. Smaller, low value or light-weight items are normally posted using Royal Mail Recorded or Royal Mail Special Delivery.

Once your product has been dispatched, you will be notified via email and sent a unique consignment number, you can use this number at to check the status of your delivery. If you have provided a mobile telephone number, Interlink's Predict service will notify you by text (and email) of a one-hour delivery window. If the window they suggest is inconvenient, you can change the date of delivery to a later one via text or email.

*We ship free of charge to mainland UK addresses, excluding the Scottish Highlands or 'Out-Of-Reach' Scottish locations. Please consult the post-codes below to see if your location falls within this category. If you are still unsure, please contact us on 01432 354921. We also ship to Northern Ireland, Channel Islands, Scilly Isles, Scottish Isles and Scottish Highlands, however delivery to these locations will incur a charge and can only be sent via a 2-day service.

Shipping CostsMainland UK (Next-Day)Offshore/Out-of-reach (2-day)Northern Ireland, Channel Islands, Isle of Man, Scottish Islands, Scilly IslandsRepublic of Ireland (2-day)
Under £50 Orders £7.50 £12.50 £15.00
Over £50 Orders FREE £19.99 £29.99
Surcharge Orders £50.00 £69.99 £79.99
Saturday Delivery £12.99 N/A N/A
Sunday Delivery £12.99 N/A N/A
Saturday by 12 Delivery £35 N/A N/A


Post codes exempt from the free delivery service include:

Scottish Highlands Post Codes: AB30-38, AB41-42, AB44-56, FK17-99, G83, IV1-28, IV30-39, IV52-54, IV63, KW1-14, PA21-33, PA34-40, PH15-26, PH31-41, PH49-50
Islands Post Codes: HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3
Northern Ireland: All BT postcodes
Channel Islands Post Codes: JE, GY
Scilly Isles Post Codes: TR21, TR22, TR23, TR24, TR25

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