# Headphones Sennheiser HD 660S2

**URL:** https://aio.lv/en/product--sennheiser-4260752330374--11531538
**Data updated:** 2026-03-11 13:38 (EET)
**Category:** Headphones
**Manufacturer:** Sennheiser
**Manufacturer code:** 4260752330374
**EAN:** 4260752330374
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 477.99 €
**Prices and availability valid until:** 2026-08-09 23:59
**Price without VAT (21%):** 395.03 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sennheiser-4260752330374--11531538

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 28.07.2026 | free |
| Pickup points | 31.07.2026 | 1.89 EUR |
| Courier delivery to door | 31.07.2026 | 4.99 EUR |

## Summary description

The Sennheiser HD 660S2 headphones feature an open-back design, delivering natural sound with excellent detail and clarity. They have a comfortable fit with plush ear pads and a lightweight design. The headphones are equipped with high-quality transducers for a balanced sound profile, making them ideal for audiophiles and music enthusiasts. The detachable cable allows for easy replacement and customization.

## Long description

The Sennheiser HD 660S2 is an open-back, over-ear headphone designed to deliver natural, detailed audio reproduction. With high-quality transducers and a balanced sound profile, these headphones emphasise clarity across frequencies while maintaining controlled bass and smooth treble. The HD 660S2 features a lightweight construction and plush ear pads for extended listening comfort, and a detachable cable for easy replacement or upgrades.
Advantages
Open-back acoustics provide a wide, airy soundstage and accurate imaging for critical listening. The transducers are tuned for neutrality and detailed resolution, suitable for both instrumental and vocal content. Comfortable ear cushions and a lightweight headband reduce fatigue during long sessions. The detachable cable adds versatility and simplifies maintenance or customization.
Suitable for
 Audiophile home listening and critical music evaluation
 Studio reference monitoring in treated environments
 Enjoying detailed acoustic, classical, jazz, and vocal-focused recordings
 Listening sessions that prioritise soundstage and imaging over isolation
Key specifications
 Open-back, over-ear design for natural soundstage
 High-fidelity dynamic transducers tuned for a balanced frequency response
 Lightweight headband and plush ear pads for extended comfort
 Detachable cable for easy replacement and compatibility with aftermarket cables
How to use
Connect the detachable cable to a suitable headphone output on your amplifier, DAC, or audio interface. Position the ear cups over your ears so that the ear pads form a comfortable seal without excessive pressure. For best results with open-back headphones, listen in a quiet, acoustically treated or low-reflection room to fully appreciate the soundstage and imaging. Adjust source volume to a moderate level before prolonged listening.
Usage recommendations
Use with high-quality headphone amplifiers or DAC-equipped sources to achieve optimal dynamics and detail. Avoid using open-back headphones in noisy or public environments where sound leakage or lack of isolation may be undesirable. Store the headphones in a dry place and disconnect the cable when not in use to extend component life.

## FAQ

### How much does the Headphones Sennheiser HD 660S2 cost, and is it available for purchase?

The price is 477.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 9 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 28.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Headphones Sennheiser HD 660S2 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 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

## Image

https://aio.lv/img/cache/product/11531538/66541802_large.webp