1)A NEW AUDIOPHILE VERSATILITY
The new HD 660 S lets you enjoy sophisticated audiophile sound in even more listening situations. The successor of the legendary HD 650 excels with the improved performance of its new transducer design. Thanks to its lower impedance, it delivers reference-class sound also when connected to hi-res mobile players, thus offering much greater versatility. The HD 660 S is an elegantly designed piece of high-quality engineering that indulges the demanding listener with aural precision and great wearing comfort.
2)SOUND FOR THE PASSIONATE MUSIC ENTHUSIAST
Made for the demanding listener, the HD 660 S surpasses the exceptional performance of its predecessor, the legendary HD 650. With a crisp bass, excellent mid-frequency response, and a gentle, pleasantly natural treble, the HD 660 S has an expressiveness that immerses you in every emotion and nuance of music. Still, it always stays exceptionally accurate and transparent.
3)CUTTING-EDGE SENNHEISER TECHNOLOGY
The HD 660 S features a new transducer design developed by Sennheiser. This results in improved control of the diaphragm movements thanks to a specially manufactured precision stainless steel fabric, which is adapted to the contour of the diaphragm. Extremely light aluminum voice coils ensure the highest impulse fidelity. The transducers are carefully selected and paired by hand to ensure consistently narrow (±1 dB) tolerances.
The HD 660 S has been created to enjoy music in supreme quality and from many different audio sources. Thanks to its low impedance it also offers reference-class fidelity with hi-res mobile players. Naturally, the HD 660 S reveals its full potential when it is connected to the balanced outputs of a dedicated headphone amplifier such as the HDV 820 or to the balanced output of a mobile digital audio player. Accordingly, it comes with a choice of cables for just about any occasion. All cables are made of highly conductive OFC copper, featuring very low handling noise and sturdy para-aramid reinforcement.
5)DESIGNED FOR HIGH-END COMFORT
Everything about the HD 660 S makes listening a pure pleasure – not least its strong yet lightweight open construction. The elliptical ear cups are shaped to follow the anatomy of the ear, while thick padding on the headband and the replaceable ear cushions guarantee hours and hours of listening in supreme comfort.
6)THE LOOK OF SOPHISTICATION
The pure and effortless sound of the HD 660 S is reflected in its new matt black and anthracite design. It is a high-end aesthetic that embraces both timeless elegance and contemporary style – uncompromising in its craftsmanship, like everything about the HD 660 S.
The Singxer SA-1 is a high-performance, full-featured headphone amplifier, and preamplifier based on Class A architecture and discrete, fully balanced circuitry. Completely analog, there is no EMI interference from digital control to disrupt the audio signal. ROHM input transistors provide very low noise and excellent performance. The output stage uses multi-stage current amplification, similar to that found in a high-power amplifier. Each channel has 2 pairs of 4A ON Semiconductor transistors to ensure low internal resistance and high output power. These circuits also incorporate a complete protection system against overcurrents, overloads, short circuits as well as thermal protection, DC protection, and switch-on delay.
This SA-1 also has a complete set of connectors. The input is asymmetrical RCA and symmetrical XLR. For the headphone outputs, the amplifier offers a 4.4mm jack and 4-pole XLR balanced, and a 6.35mm jack unbalanced. On the preamplifier output side, the SA-1 provides an unbalanced RCA output and a balanced XLR output.
In order to fit any type of headphones or earphones, whether they are high-sensitivity or high-impedance models, the SA-1 offers a choice of gain (low or high).
>Fully Independent Class-A Analog Amplification Circuit
Class "A" is a type of amplifier circuit that reproduces the whole signal wave resulting in a higher-fidelity output with no cross-over distortion. The Singxer SA-1 features a true four-way fully independent, fully discrete Class-A amplification circuit design. It is a pure analog circuit with pure analog control without any EMI(Electro-Magnetic Interference) caused by digital controls.
>Fully Balanced Output
The Singxer SA-1 is a fully balanced audio amplifier with balanced XLR signal inputs. The audio signal is then amplified using top-class amplification circuitry providing low-distortion and noise floor. For final output, the device features 4-pin XLR/4.4mm Balanced headphones output ports. For Pre-out the SA-1 is equipped with XLR balanced line-out too.
The SA-1 also features 6.35mm single-ended headphone output and RCA single-ended pre-amp line-out functionality.
>Super-Clean Signal Amplification
The Singxer SA-1 chipset features high-quality premium components that enable the device to provide a super-clean output with ultra-low harmonic distortion and noise ratings. The output has a THD+N rating of -120dB @ 1kHz A-weighted. The output has a super-low noise floor even with sensitive pairs of IEMs and Headphones there is no sign of distortion or noise. All you get is a pitch dark background where the minutest of musical details pop out making the output full of life.
Singxer has designed the internal audio circuitry of the SA-1 to provide protection against electrical issues like overcurrent, overload, overheating, short circuit, Start-up delay, and more. So users can enjoy their music without worrying about power causing any trouble to the device.
Sennheiser HD660s Specifications
Impedance 150 Ω
Connector 6.35 mm / 4.4 mm Pentaconn
Frequency response 10 – 41,000 Hz (-10 dB)
Sound pressure level (SPL) 104 dB at 1V 1kHz
Ear coupling Over-ear (circumaural)
THD + N, total harmonic distortion and noise < 0,04% (1 kHz, 100 dB) Transducer principle (headphones) Dynamic, open
Weight w/o cable Approx. 260 g (without cable)
Singxer SA1 Specifications
Product Type: Headphone amplifier / Preamplifier
Amplification Type: Class A
Inputs: 1x Balanced XLR / 1x Single-ended RCA
Outputs: 1x Balanced XLR / 1x Single-ended RCA
1x Balanced Jack 4.4mm headphone output
1x Balanced XLR 4 poles headphone output
1x Single-ended Jack 6.35mm headphone output
Output power: 6480mW @ 32Ω / 2000mW @ 120Ω / 380mW @ 600Ω
Power supply: 100-240V AC, 50/60Hz
Dimensions: 234 x 170 x 46mmmm
- 1)HD 660 S
2)Cable with 6.35 mm plug
3)Cable with 4.4 mm Pentaconn plug (balanced)
4)6.35 to 3.5 mm Adaptor