Do these use same speakers as Porta Pros?

Officially, I have never seen Koss admit that Kph40 and Porta Pros have the same driver. But having both, I tested them on a Steely Dan song "Lunch with Gina" and I can't tell any difference in the sound. So I think it comes to which head band you prefer, the folding Porta Pros or the single band 40.

Where can you buy a balanced cable for the KPH40 utility headphones?

Just got mine KPH40 and checked the cable. It seems that 2.5mm TRRS socket is indeed balanced, but configured in 3.5mm standard (T: R+, R: L+, R: L-, S: R-). So it's NOT compatible with 2.5mm balanced output (like FIIO BTR5) using "straight" cable. You would have to use crossed cable for this setup (haven't found one yet), or use device with 3.5mm balanced standard.

Does anyone know when these will be back in stock? I would love to get a pair! :-)

I Believe these are Quite available now (compared when 1st introduced !) either through Amazon- or Koss Factory Direct.

Koss should make a bluetooth ‘pendant’ for the utility series. that would be the icing. does any know of a bluetooth receiver with 2.5 mm termination?

There are none. The problem here is you need to convert the 2.5mm trrs configuration with a wire. You can get any wire which fits hd598 either balanced or unbalanced. Then only connect to a Bluetooth pendant.

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Koss KPH40 Utility On-Ear Headphones, Stealth Grey, Interchangeable Cord

Product ID: 379307046

Details

Brand
Koss
Color
Stealth Black
Ear Placement
On Ear
Form Factor
On Ear
Impedance
60 ohm

🎧Open-back design for immersive sound

🔄Interchangeable 3.5mm cord for versatile use

⚙️Stainless steel chassis for durability

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Description

🎧 Elevate your sound game with retro flair and modern durability!

AUDIOPHILE GRADE SOUND CLARITY - Experience ultra-wide frequency response up to 25kHz for crisp highs and deep lows.
RETRO STYLE MEETS MODERN UTILITY - Stealth grey open-back headphones combine vintage aesthetics with contemporary performance.
PLUG PLAY AND SWITCH EFFORTLESSLY - Detachable 3.5mm cable lets you customize your setup and stay connected anywhere.
BUILT TO LAST WITH PREMIUM MATERIALS - Stainless steel adjustable headband ensures a perfect fit and long-lasting durability.
FEATHERLIGHT COMFORT FOR ALL DAY WEAR - Ultra-lightweight design (0.11 kg) with soft foam ear cushions keeps you focused, not fatigued.

The Koss KPH40 Utility On-Ear Headphones deliver audiophile-quality open-back sound with an ultra-wide frequency response of 25,000 Hz. Crafted with a stainless steel chassis and adjustable headband, these ultra-lightweight headphones (0.11 kg) offer all-day comfort with soft foam ear cushions. Featuring a detachable 3.5mm cord, they provide versatile connectivity for any device, wrapped in a sleek stealth grey retro design.

Specifications

ASIN	B09KZC94X1
Additional Features	Lightweight
Age Range Description	Adult
Antenna Location	Everyday Use, Traveling, Exercising, Recording
Audio Driver Type	Dynamic Driver
Best Sellers Rank	#7,354 in Electronics ( See Top 100 in Electronics ) #162 in On-Ear Headphones #528 in Earbud & In-Ear Headphones
Brand Name	Koss
Built-In Media	Cable
Cable Features	Detachable
Color	Stealth Black
Compatible Devices	Devices with 3.5mm audio jack, USB-C port, or Lightning port
Connectivity Technology	Wired
Control Method	Touch
Control Type	Media Control
Controller Type	Wired
Customer Package Type	FFP
Customer Reviews	4.3 4.3 out of 5 stars (1,353)
Earpiece Shape	Rounded, flat or slightly curved surface
Enclosure Material	Stainless Steel
Frequency Response	25000 hertz
Headphone Folding Features	On Ear
Headphone Jack	3.5 mm Jack
Headphones Ear Placement	On Ear
Impedance	60 ohm
Item Weight	0.11 kg
Manufacturer	Koss
Model Name	KPH40 Utility Parent
Model Number	KPH40 Utility Parent
Noise Control	None
Number of Items	1
Sensitivity	101 db
Style Name	open-back
Theme	Retro
UPC	021299197455
Unit Count	1 Count
Warranty Description	Limited Lifetime Warranty
Water Resistance Level	Not Water Resistant
Wireless Technology	Bluetooth

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12485 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered 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 Kyrgyzstan.

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TrustScore 4.5 | 7,300+ reviews

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