are these compatible with iphones (5 or 6) and samsung galaxy phones?

These are true studio monitor headphones! They have no inline controls and a long, straight, somewhat heavy cable with a heavy metal 1/4" phono connector. So, although they will work with ANY phone, they are not the best suited to portable use. They don't fold up and you'll need an adapter to plug them into your phone (they don't come with one, or anything else for that matter). They also have fairly flat frequency response; for most people this is experienced as cold, "sterile" sound with not enough bass! If you are set on these, might I suggest the MDR-7506 model. They are almost identical physically, but fold up, have a coiled (but still heavy) cord and a "warmer" more pleasing sound. They also come with an integrated mini phone adapter (just unscrew the 1/4" connector!) Still, not the most portable and no inline controls, but you'll save some money and probably like them better.

Is it possible that after 10-hour flight bass become weaker? Thank you.

Weaker? No. I have owned 3 pairs in my life over the last 2 decades. Highly doubt this will happen in a 10 hour time period but over time, the pads can flatten and therefore the drive becomes just a half-millimeter to one millimeter closer to your ear causing it to sound like there is less bass and more prominent mids and highs. I say this because when my pads deteriorate over time and I've bought new stock pads, It sounds like the highs become slightly recessed making it sound like there is more bass.

Mdr Cd900st Studio Monitor Stereo Headphones Japan Import

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1464.15 DT

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎶 Hear Every Detail, Own Every Beat.

EXTENDED REACH CABLE - 2.5m wired connection ensures freedom of movement in studio or workspace without compromise.
PRECISION STUDIO SOUND - Experience crystal-clear audio with a wide 5-30,000 Hz frequency range, perfect for professional monitoring.
POWERFUL DYNAMIC DRIVERS - 40mm dome-type drivers deliver rich, detailed sound with exceptional clarity and depth.
TRUSTED PROFESSIONAL STANDARD - Sony’s MDR-CD900ST is the go-to choice for audio engineers and creatives demanding accuracy.
ROBUST BUILD LIGHTWEIGHT COMFORT - Sealed dynamic design weighs just 200g (without cable) for all-day wear without fatigue.

The Sony MDR-CD900ST Studio Monitor Stereo Headphones are a Japan-imported professional-grade audio tool featuring 40mm sealed dynamic drivers, a broad 5-30,000 Hz frequency response, and a robust 1000mW max input power. Lightweight at 200g (without cable) and equipped with a 2.5m wired connection, these headphones deliver precise, high-fidelity sound tailored for studio monitoring and critical listening.

Specifications

ASIN	B000UPEJCU
Additional Features	Lightweight
Age Range Description	Adult
Antenna Location	Recording
Audio Driver Type	Dynamic Driver
Best Sellers Rank	#44,530 in Electronics ( See Top 100 in Electronics ) #656 in On-Ear Headphones
Brand Name	Sony
Built-In Media	Cable
Cable Features	Detachable
Color	Black
Compatible Devices	Wired Devices
Connectivity Technology	Wired
Control Method	Remote
Control Type	Touch Control
Controller Type	Volume control
Customer Reviews	4.3 4.3 out of 5 stars (1,488)
Earpiece Shape	Rounded or oval
Enclosure Material	Format: sealed dynamic driver unit: 40 mm, dome type (CCAW accepted) Maximum input 1000 mW, impedance: 63 Ω, sound pressure sensitivity: 106 dB/mW playback frequency: 5 ~ 30,000 Hz, cable length: (without cable) approx. 200 g: approx. 2.5 m, Connector: standard stereo plug, ground
Frequency Range	5hz - 30khz
Frequency Response	30000 hertz
Headphone Folding Features	On Ear
Headphone Jack	3.5 mm Jack
Headphones Ear Placement	Over Ear
Impedance	63 ohm
Item Weight	290 g
Manufacturer	Sony
Model Name	MDR CD900ST
Model Number	MDR-CD900ST
Noise Control	None
Number of Items	1
Series Number	900
Specific Uses For Product	Recording
Style Name	Modern" or "Contemporary
Theme	Music, Portability, Professional
Unit Count	1 Count
Water Resistance Level	Not Water Resistant

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