# Headphones Koss Pro4S

**URL:** https://aio.lv/en/product--koss-184474--1217639
**Data updated:** 2025-12-29 05:42 (EET)
**Category:** Headphones
**Manufacturer:** Koss
**Manufacturer code:** 184474
**EAN:** 021299184479
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 116.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 96.27 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--koss-184474--1217639

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Wednesday | free |
| Pickup points | 22.06.2026 | 1.99 EUR |
| Courier delivery to door | 22.06.2026 | 4.99 EUR |

## Summary description

The Koss Pro4S headphones are designed for stage and studio use, featuring a wired connection. With a frequency range of 10 - 25000 Hz and a cable length of 1.4 m, they provide excellent sound quality. The sleek black and silver design adds a professional touch to your audio setup.

## Long description

The Koss Pro4S Studio Headphone is a full-size, over-ear wired headphone designed for professional studio and stage use. Tuned with the new SLX40 element for reference listening, it delivers accurate, unbiased sound reproduction. The headphones use a D-profile earcup with memory foam cushions and aluminum cups wrapped in soft protein leather for a balance of durability and comfort. A detachable cord with dual-entry and pass-through capability, a fold-flat design, and included carrying case make the Pro4S suitable for mobile monitoring and daily professional use.
Advantages
The Pro4S offers studio-oriented sound from Koss SLX40 elements, a D-profile earcup that creates a consistent acoustic seal, and a rugged metal-on-metal assembly for increased durability. Comfort is provided by memory foam cushions and a padded metal headband covered in breathable mesh. The detachable cable with dual-choice entry enables flexible setup and pass-through listening, while the fold-flat design and carrying case support portability.
Suitable for
Studio monitoring and mixing
Stage and live sound monitoring
Critical listening and reference checks
Mobile engineers and musicians who need portable, durable headphones
Key specifications
Type: Full-size, circumaural (over-ear) headphones
Driver element: Koss SLX40 (studio reference tuning)
Connectivity: Wired, detachable cable with dual-entry
Frequency response: 10–25,000 Hz
Cable length: 1.4 m
Wearing style: Head-band
Colour: Black, Silver
Construction: Aluminum earcups, memory foam cushions, metal headband
How to use
Connect the detachable cable to the preferred earcup input; the opposite earcup then functions as an output for pass-through or daisy-chaining. Place the D-profile earcups over the ears to achieve a natural seal and adjust the headband for a comfortable fit. For studio or stage use, connect to your headphone amplifier, mixer, or audio interface using the appropriate adapter if required.
Usage recommendations
For accurate reference monitoring, allow a short break-in period and listen at moderate levels when comparing mixes. Store the headphones folded flat in the supplied carrying case when transporting to protect the earcups and assembly.

## Specifications

### Headphones

| Feature | Value |
|---|---|
| Headphone frequency | 10 - 25000 |
| Headphone sensitivity | 99 dB |
| Impedance | 35 Ω |
| Ear coupling | Circumaural |

### Ports & interfaces

| Feature | Value |
|---|---|
| Connectivity technology | Wired |
| 3.5 mm connector | Yes |

### Performance

| Feature | Value |
|---|---|
| Cable length | 1.4 m |
| Product colour | Black, Silver |
| Detachable cable | Yes |
| Wearing style | Head-band |
| Recommended usage | Stage/Studio |
| Product type | Headphones |

### Other features

| Feature | Value |
|---|---|
| Quantity | 1 |

### Microphone

| Feature | Value |
|---|---|
| Microphone type | Not available |

### Design

| Feature | Value |
|---|---|
| Foldable | Yes |

### Packaging content

| Feature | Value |
|---|---|
| Carrying case | Yes |

## FAQ

### How much does the Headphones Koss Pro4S cost, and is it available for purchase?

The price is 116.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 7 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on Wednesday at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Headphones Koss Pro4S be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Koss products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Koss service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: ear coupling, connectivity technology, cable length, wearing style, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/1217639/62259016_large.webp