Our Team goes above and beyond expectations to deliver amazing service – that’s what doing the right thing means to us. Orin Orun AVL is committed to always giving more to our customers, our employees, and our community.

Sennheiser HD 660 S Overview

The HD 660 S Open-Back Dynamic Headphones from Sennheiser are headphones for the passionate audiophile and are crafted for the most demanding listener. Built with a transducer design that delivers lower harmonic distortion, they provide a natural, lifelike audio experience and can be used to produce crisp bass, transparent mid-frequency response, and a natural treble when connected to high-res players or portable audio devices.

With an impedance of 150 Ohms and a frequency response of 10 Hz to 41 kHz, the HD 660 S headphones are equipped with a choice of cables that feature both balanced (4.4mm Pentaconn) and 1/4" connectors. A 1/4" to 1/8" adapter is also included. This allows you to enjoy reference-class, high-fidelity sound with stationary and mobile audio players alike.

Audiophile Versatility

Enjoy the HD 660 S sound in even more listening situations. Thanks to a lower impedance than the previous HD 650 model, they deliver reference-class sound when connected to high-res mobile players. They indulge the demanding listener with aural precision and a comfortable fit.

Sound for the Passionate Music Enthusiast

Made for the demanding listener, the HD 660 S feature powerful performance with crisp bass, detailed mid-frequency response, and gentle, natural treble. These headphones immerse you in the emotion and nuance of the music. They are accurate and transparent.

Cutting-Edge Technology

Built with a transducer design that improves control of the diaphragm movements, the headphones are manufactured with precision stainless-steel fabric that adapts to the contour of the diaphragm. Aluminum voice coils ensure high impulse fidelity. Transducers are carefully selected and paired by hand to ensure consistently narrow tolerances (±1 dB).

Connectivity from Different Audio Sources

With their low impedance of 150 Ohms, the HD 660 S offer reference-class fidelity with high-res mobile players. They come with a choice of cables for just about any occasion. All cables are made of OFC copper, featuring very low handling noise and sturdy para-aramid reinforcement.

Designed for Comfort

The elliptical earcups are shaped to follow the anatomy of the ear, while thick padding on the headband and the replaceable ear cushions provide for hours of listening in comfort.

Nominal Impedance

A nominal impedance of 150 Ohms allows for direct connection to both stationary and mobile high-res Players.

Sennheiser HD 660 S Specs

Headphone

Driver Type	Dynamic
Design	Over-Ear (Circumaural)
Earcup Style	Open-Back

General

Frequency Response	10 Hz to 41 kHz
Impedance	150 Ohms
Maximum Sound Pressure Level (SPL)	104 dB at 1 kHz / 1 Vrms
Total Harmonic Distortion (THD)	0.04%

Connectivity

Audio Connector to Source	4.4 mm TRRRS
Connector Plating	Gold

Physical

Weight

9.2 oz / 260 g

Packaging Info

Package Weight	3.41 lb
Box Dimensions (LxWxH)	12.75 x 10.2 x 4.25"

Why Choose Us?

Do the Right Thing

We go above and beyond expectations to deliver amazing service – that’s what doing the right thing means to us. Orin Orun AVL is committed to always giving more to our customers, our employees, and our community.

Dedicated to Helping

Our team has grown significantly over the years, and our mission to do the right thing remains the same. We come to work every day with a common vision of delivering music makers, Pro audio and lighting users the best selection, service, and support in the world. Together, we make dreams come true.

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