At $1,999, the Technics HA-507 is a pure analog headphone amplifier and preamplifier with a balanced/dual mono configuration. Although TEAC’s Reference 500 series includes UD models that combine both ...

Hardcore audiophiles are generally immune to sticker shock for high-end audio gear like $50,000 speaker-based rigs. But now you can get the same level of sound for a lot less if you build a sound ...

We published a design for a stereo microphone preamplifier with balanced inputs and a phantom power supply. The heart of this circuit was a special Analog Devices IC, the SSM2017. Unfortunately, this ...

In a balanced op-amp circuit, the op-amp inputs see equal impedances looking into the circuit. Balanced circuits provide better performance by cancelling some input errors and have a simple R F /R I ...

Monoprice’s Desktop Headphone Amplifier delivers high performance, rich features, and high value for the demanding audio enthusiast. It might be disappearing from smartphones, but plenty of home and ...

The single op-amp differential amplifier shown in Figure 1 is often used as an audio balanced line receiver. Obtaining high common-mode rejection is a critical requirement that requires four ...

Rega's new flagship preamplifier and power amplifier have been an open secret: the brand has been showing off the new Mercury and Solis products at trade shows over the last year – we caught our first ...

The Andover SpinStage really shines when used with higher-priced cartridges, but this phono pre-amp can enhance any turntable’s sound, and it can grow with upgrades to your home-audio system. Andover ...

This new Bryston pre-amplifier incorporates Salomie input circuitry – named through its development with the late Ph.D. engineer Dr. Ioan Alexandru Salomie – which can be found in the company’s Cubed ...

The SingXer SA-1 Headphone Amplifier isn’t very sexy but it might be one of the best headphone amplifiers below $600 right now. SingXer started in 2011 and its initial focus was on fixing what they ...