# Sennheiser wired in-ear headset CX 300S — intraaural, 1.2 m cable, black

**URL:** https://aio.lv/en/product--sennheiser-508593--4257451
**Data updated:** 2026-03-07 11:12 (EET)
**Category:** Headphones
**Manufacturer:** Sennheiser
**Manufacturer code:** 508593
**EAN:** 4044155245066
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 42.49 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 35.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sennheiser-508593--4257451

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 9.89 EUR |

## Summary description

Sennheiser CX 300S is a wired in-ear headset designed for calls and music. It features intraaural ear coupling, a 1.2 m cable for stable wired connection, and a compact in-ear wearing style in black. Suitable for mobile devices and portable players, it offers reliable wired audio for everyday listening and voice calls.

## Long description

Sennheiser wired in-ear headset CX 300S is a compact wired in-ear headset designed for calls and music. The intraaural ear coupling provides close-fitting ear contact for improved isolation from ambient noise. With a 1.2 m cable and a standard 3.5 mm connection, the CX 300S offers a stable wired link to mobile devices and portable players. The headset is supplied in black and includes multiple ear adapter sizes to support a customized in-ear fit.
Advantages
The CX 300S includes a built-in microphone and remote that let you manage calls and control playback without reaching for your device. Its ergonomic in-ear design reduces external noise for more focused listening and clearer voice pickup during calls. The cable is designed to resist tangling and everyday wear, supporting reliable wired audio performance. Sennheiser transducer design delivers detailed sound reproduction and pronounced bass response while keeping a compact in-ear form factor.
Suitable for
 Listening to music on smartphones and portable players
 Making and receiving voice calls with the inline microphone
 Commuting and travel where ambient noise isolation is useful
 Everyday wired listening when battery-free operation is preferred
Key specifications
 Ear coupling: intraaural (in-ear)
 Connectivity: wired
 Cable length: 1.2 m
 Standard connector: 3.5 mm
 Nominal impedance: 18 Ω
 Sensitivity: 118 dB
 Included ear adaptor sizes: XS, S, M, L
 Weight: 12 g
How to use
Insert the ear adapters that best match your ear canal size for a secure, comfortable fit and optimal isolation. Plug the 3.5 mm connector into your device's headphone jack. Use the inline remote to answer or end calls and to pause or resume music playback. Position the cable so it lies comfortably over or behind your ears to reduce microphonics and cable noise during movement. After use, store the earphones and accessories in the supplied pouch to protect them from damage and tangling.
Usage recommendations
For best audio and call performance, select the ear adapter size that creates a snug seal in your ear canal. Keep volume at moderate levels to protect hearing and reduce distortion. When not in use, coil the cable loosely and keep the earphones in the storage pouch supplied to extend their service life.

## Specifications

### Headphones

| Feature | Value |
|---|---|
| Headphone frequency | 17 - 21000 |
| Headphone sensitivity | 118 dB |
| Impedance | 18 Ω |
| Ear coupling | Intraaural |
| Acoustic system | Closed |

### Ports & interfaces

| Feature | Value |
|---|---|
| Connectivity technology | Wired |
| Bluetooth | No |
| Microphone in | Yes |
| USB connectivity | No |
| 3.5 mm connector | Yes |
| 2.5 mm connector | No |
| 6.35 mm connector | No |
| RF connectivity | No |

### Performance

| Feature | Value |
|---|---|
| Cable length | 1.2 m |
| Product colour | Black |
| Total Harmonic Distortion (THD) | 0.5 % |
| Volume control | Buttons |
| Headset type | Binaural |
| Wearing style | In-ear |
| Sound pressure level (max) | 118 dB |
| Recommended usage | Calls/Music |
| Product type | Headset |

### Other features

| Feature | Value |
|---|---|
| Material | Rubber, Silicone |
| Pouch | Yes |

### Microphone

| Feature | Value |
|---|---|
| Microphone frequency | 100 - 10000 |
| Microphone sensitivity | 44 dB |
| Noise-canceling | Yes |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 12 kg |

### Packaging content

| Feature | Value |
|---|---|
| Accessories included in set | 4 sizes silicone eartips |

## FAQ

### How much does the Sennheiser CX 300S wired in-ear headset cost, and is it available for purchase?

The price is 42.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 01.07.2026 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: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### 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 Sennheiser 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 Sennheiser 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, weight, product colour, wearing style, 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/4257451/51372634_large.webp