In the box is says Lifetime warrenty, is that correct?

In the UK the lifetime warranty is honoured by Hama UK. You need to return the item at your own cost and pay £5 for return postage and handling. I just returned my headphones for the second time in 9 years - first time the plug became temperamental and this time one of the units stopped working. They don't repair, they send replacement.

Are these headphones suitable for heavy metal music (thrash/progressive metal in particular)?

Hi ElvenLord : Sorry, I'm too old to give a specific answer for that genre. I can report on excellent results with old school such as Dark Side of the Moon and Tangerine Dream "The Sorcerer" but make sure your playback has a graphic equaliser app or feature. Also be aware that the range of size headband adjustment is ok but not marvellous.

Do I get the Koss lifetime warranty, if i buy these from you as oppose to the home site?

Hama offer repairs in the UK and will do it under the lifetime warranty... I think you just need proof of purchase and a £5 handling charge

are these suitable for a kindle fire?

Yes they work fine with my own kindle fire hd (2nd generation) as they both use 3.5mm stereo jack. This also means they will support most devices such as MP3 players and mobile phones.

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"Porta Pro" Stereophones (3.5 mm Jack) for iPhone/iPad/iPod/MP3 Players/Samsung/Smartphones - Black | Silver

Product ID: 48335941

Details

Brand
Koss
Colour
Black/Silver
Connectivity technology
Wired
Ear placement
On Ear
Form factor
On Ear
Headphone jack
3.5 mm Jack

🎧Dynamic 20Hz-20kHz sound

🔄Retractable cable for tangle-free use

🎚️On-ear volume control

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Description

🎧 Elevate your everyday audio—classic comfort meets modern convenience.

ICONIC DYNAMIC SOUND - Experience rich, full-range audio from 20Hz to 20kHz that keeps your playlist alive.
ERGONOMIC ON EAR COMFORT - Lightweight over-ear cups designed for all-day wear without fatigue, perfect for marathon work sessions or commutes.
SEAMLESS DEVICE COMPATIBILITY - Plug and play effortlessly with any 3.5mm jack device—iPhone, Samsung, MP3 players, and more.
TANGLE FREE RETRACTABLE CABLE - Say goodbye to cable chaos with a sleek retractable design that fits your on-the-go lifestyle.
INTUITIVE WIRED VOLUME CONTROL - Adjust your sound instantly with easy-access touch controls—no fumbling, just flawless focus.

The Koss Porta Pro Stereophones deliver legendary dynamic sound quality with a wide 20Hz-20kHz frequency range, housed in lightweight, ergonomic on-ear cups. Featuring a retractable cable and wired volume control, these headphones offer seamless compatibility with any 3.5mm jack device, making them the perfect blend of retro style and practical functionality for professionals who demand both performance and portability.

Specifications

ASIN	B00001P4ZH
Age Range Description	Adult
Antenna Location	Indoor/Outdoor
Audio Driver Type	Dynamic Driver
Best Sellers Rank	621 in Headphones & Earphones 1,186 in Portable Sound & Vision Accessories
Box Contents	earbuds
Brand Name	Koss
Cable Features	Retractable
Carrying Case Material	Cardboard
Colour	Black/Silver
Compatible Devices	[Wide Range of] Compatible Devices
Control Method	Touch
Control Type	Volume Control
Controller Type	wired controller
Customer Package Type	Standard Packaging
Customer Reviews	4.4 4.4 out of 5 stars (14,230)
Earpiece Shape	over_ear_cups
Enclosure Material	Plastic
Frequency Range	20 Hz - 20,000 Hz
Global Trade Identification Number	00021299147764, 00719040115079, 04007249270429
Headphone Form Factor	On Ear
Headphone Jack	3.5 mm Jack
Headphones Ear Placement	On Ear
Impedance	60 Ohms
Is Autographed	No
Item Weight	0.4 Pounds
Manufacturer	Koss
Model Name	Porta Pro
Model Number	6303157
Network Connectivity Technology	Wired
Noise Control	None
Number of Items	1
Product Features	Wired
Sensitivity	60 Ohm
Specific Uses For Product	listening to music
Style Name	Porta Pro
UPC	719040115079 021299147764 212991477642 021299101384
Unit Count	1.0 count
Water Resistance Level	Not Water Resistant
Wireless Technology Type	Bluetooth

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S/.382

Duties & taxes included

In stock

Sold byAmazon PeruDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Peru.

Secure transaction

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