Modified HiFiMan HE400se with SuperGrills

(1 customer review)


Balanced HifiMan HE400se headphones

In stock (can be backordered)


We were very impressed with the price to performance ratio of the stealth magnet version of the HE400se and decided to see how much extra goodness we could squeeze out of them. After months of R&D it turned out they had a lot to give. We have improved the airflow which has given them deeper, punchier, more accurate bass. We also put a lot of work into the inside of the earcup which gives a much more open and airy sound with a much wider sound stage.

Frequency plot
Frequency plot for modified HE400se


As standard they will come with the original HiFiMan cable but we do also have the option for one of our braided litz cables which have balanced options for use with balanced amps.

Customer service and warranty

We know that you are paying a premium for our headphones and that they are a very important part of your life. Our headphones are made durable and reliable, but in the unlikely event that you do have an issue with them, please get in contact with us and we will make sure that we get you sorted out. We offer a full 2 year ‘return to base’ warranty, and we keep all of the spare parts in stock so that we can also send replacement parts if necessary. Outside of the warranty period we still offer repairs on all our products for a fair price.

International orders

Close to 70% of our customers are outside of the UK, so we have a lot of experience with international orders and worldwide shipping. All packages over £50 will have a form of international tracking.

– European packages normally take 4-6 days.
– US, AUS and Canada packages normally take 7-10 Days.
– Packages sent to the rest of the world can vary depending on local postal services.
– Packages shipping outside of the EU may be delayed in customs, but the tracking system should keep you updated of its progress.

Custom Cans UK VAT number: 141 987 390


Additional information

Weight 1.6 kg
Dimensions 27 × 31 × 19 cm
Cable Length

1m, 1.25m, 1.5m, 2m, 2.5m, 3m, 3.5m, 4m, 5m

1 review for Modified HiFiMan HE400se with SuperGrills

  1. Neil. Shrewsbury

    Over the years I have heard / owned plenty of planars, which are great with acoustic music , orchestral and jazz, but just sound a bit boring with rock music. Not any more, the modded HiFiman 400SEs are a great all rounder, with greater scale than most planars.

    I have not heard the OEM 400SE, so cannot compare them, but the Custom Cans version has the classic British neutral sound I prefer ( BBC sound anyone?) and work perfectly with pro amp & cables. That all makes for a great value headphone package.

    Downsides – you will definitely need an amp, probably one with a high gain setting as these are 32ohm/91 db. Plus they are heavier than similar sized dynamic headphones if you are sensitive to that.

    But for £150, Wow is the appropriate word.

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