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The AT-PHA55BT wireless headphone amplifier is a compact but powerful tool that will help you get the most out of your headphones – wherever you go.

Audio-Technica Wireless Headphone Amplifier

The AT-PHA55BT wireless headphone amplifier is a compact but powerful tool that will help you get the most out of your headphones – wherever you go. Utilizing Bluetooth® wireless technology and supporting LDAC, aptX, AAC and SBC audio codecs, the amplifier processes the digital transmission from your Bluetooth device and faithfully converts it to an analog signal via an ESS Technology ES9118 HiFi System-On-Chip (SoC). Offering up to eight hours of continuous use and a max output level of 50 mW + 50 mW, the AT-PHA55BT has the power to drive your headphones to their full potential.

Additionally, the amplifier features an output mode switch that allows you to select between two output impedance levels – one suitable for headphones with dynamic drivers, the other for headphones with balanced armature drivers – ensuring you get the best sound possible. The amplifier is designed to suppress wireless jitter and reduce acoustic resonance, and allows for fine audio tuning through its 32-step multilevel digital volume control.

The AT-PHA55BT is equipped with LED indicators that display the battery level, pairing and charging status, and the codec currently in use. The amplifier also includes a microphone so you can take calls from a paired smartphone, and comes with a belt clip and a 30 cm (1') USB charging cable.

*The Bluetooth® word mark and logos are owned by Bluetooth SIG, Inc. and any use of such marks by Audio-Technica Corporation is under license. Other trademarks and trade names are those of their respective owners.

Compact Bluetooth headphone amplifier with powerful technology to deliver high-quality wireless sound to your headphones

50 mW + 50 mW high-output amplifier drives connected headphones to perform at their maximum potential

Supports high-quality LDAC, aptX and AAC audio codecs

Output mode switch allows selection of output impedance suitable for dynamic or balanced armature drivers

32-step multilevel digital volume selection

LED status indicators display the currently connected codec, the pairing and charging status, and the remaining battery level

ESS Technology ES9118 HiFi System-On-Chip (SoC) ensures faithful reproduction of the original sound

Jitter is suppressed by controlling the clock from the wirelessly transmitted input signal side, resulting in crisp, clear audio quality with high transparency

Built-in microphone allows you to take calls from a paired smartphone

Aluminum housing reduces unwanted resonance

Includes belt clip and 30 cm (1') USB charging cable

Audio-Technica® AT-HA5050H Hybrid Headphone Amplifier

All headphones are not the same. Each model has its own character, its own sonic signature. That’s why we’ve created a headphone amp that lets you choose from four different output impedances (two outputs each of 0.1, 33, 82 and 120 ohms) to experience a sound that best suits you and your headphones.

The AT-HA5050H is a hybrid Hi-Res Audio headphone amplifier – hybrid because it employs a pair of tubes at the preamp stage and transistors at the power amp stage. Having tubes in the preamp adds warmth and depth to the music, while the bipolar transistors provide distortion-free Class A amplification that is powerful enough to drive headphones of varying impedances without any problem. To further optimize power supply in the amplifier, each part of the amplifier is fed by individual power supply units with fast recovery diodes and regulating circuitry.

The AT-HA5050H is equipped with two analog inputs (L/R RCA line jacks and L/R balanced XLR jacks) and two digital inputs (S/PDIF digital coaxial input and USB input with selectable Asynchronous and Adaptive modes). The state-of-the-art DAC is optimized to be compatible with digital audio formats up to PCM 32-bit/384 kHz and DSD128. Additional features include classic analog VU meters with VU range selector switch, large volume control knob, and an input attenuator switch.

Two E88CC vacuum tubes are used in the preamp stage to achieve the warm, mellow sound you can only get from tubes

A pair of Toshiba bipolar power transistors provide strong, driving power and high-quality sound

Sifam VU meters provide precise metering with a classic feel that matches the warm, analog tone from the tubes

Custom-made R-Core transformer counters spikes and instability in the power line, providing consistent, high-resolution amplifier performance with distinctive hybrid sonic characteristics

Lundahl transformers, Nichicon electrolytic capacitors and WIMA polyester capacitors are used to provide the best sound quality possible

Eight headphone jacks with choice of four different output impedances (0.1, 33, 82 and 120 ohms x 2) give you control of the sonic presentation without the extra noise that might be introduced by an impedance selector switch

Two analog (unbalanced RCA and balanced XLR) and two digital (USB and SPDIF digital coaxial) inputs allow the amplifier to be used with a wide range of equipment

Audio-Technica® AT-HA5050H Hybrid Headphone Amplifier with Lundahl transformers and Nichicon capacitors

Audio-Technica® AT-PHA100 Portable Headphone Amplifier-AT-PHA100

Audio-Technica® AT-PHA100 Portable Headphone Amplifier

You don’t have to settle for wimpy, muddy sound just because you’re on the go. The AT-PHA100 Portable Headphone Amplifier is small (width and length comparable to a smartphone) but packs a powerful punch. Engineered using select audio components, and enclosed in all-aluminum casing to protect the circuitry, the AT-PHA100 gives headphones a rich, detailed boost throughout the sonic range with ultra-low distortion.

The AT-PHA100 is equipped with both analog and digital inputs (3.5 mm jack and USB micro-B, respectively) and 3.5 mm headphone jack. It also features a high/low gain switch, machined aluminum volume knob, and five-stage sampling indicator for digital input. The internal lithium polymer rechargeable battery lasts up to 14 hours when amplifying an analog signal, and up to 6 hours when amplifying a digital signal.

The amplifier comes with two rubber bands and a rubber mat for strapping the unit to a smartphone or other portable device, a 1.0 m USB cable (USB 2.0 to USB micro-B) and a 10 cm audio cable terminating in a 3.5 mm gold-plated stereo mini plug at each end.

Specially selected, discrete circuitry enhances the resolution throughout the frequency range

NJR MUSES 8832 pre-amp delivers rich, powerful sound from low to high frequencies

DAC ESS ES9018K2M circuit samples 384kHz/32-bit PCM, and DSD audio sources at 2.8/5.6MHz

Texas Instruments LME49720 op-amp suppresses distortion for crystal clear mid to high frequencies

Internal rechargeable lithium polymer battery lasts up to 14 hours

High/low gain switch and machined aluminum volume knob

Five-stage sampling indicator (for digital signal input)

All-aluminum enclosure protects delicate circuitry

Includes two rubber bands and a rubber mat for strapping amp to a portable device, a 1.0 m USB cable (USB 2.0 to USB micro-B) and a 10 cm audio cable with 3.5 mm mini plugs

Audio-Technica® AT-PHA100 Portable Headphone Amplifier with discreet circuitry and almunim volume knob

Klipsch® Heritage Headphone Amplifier with low distortion and audiophile digital to analog converter

Klipsch® Heritage Headphone Amplifier

Music Hall Headphone Amplifier

Music Hall Headphone Amplifier with signal to noise 70 dB and 30 ohm to 300 ohm headphone impedance

Music Hall Headphone Amplifier-Black-ph25-2

Music Hall Headphone Amplifier-Black

Music Hall Headphone Amplifier-Black with special low noise R-core power transformer and pre-amp output

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Audio-Technica Wireless Headphone Amplifier

Audio-Technica® AT-HA5050H Hybrid Headphone Amplifier

Audio-Technica® AT-PHA100 Portable Headphone Amplifier

Klipsch® Heritage Headphone Amplifier

Music Hall Headphone Amplifier

Music Hall Headphone Amplifier-Black

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