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Alpha Design Labs A-1 Portable Headphone Amp


Product Description

Our pricing for this product is the "MAP Pricing."  This means that the prices shown here are the "minimum advertised prices" permitted by the manufacturer.

Some digital enthusiasts require small, portable DACs and headphone amps because they’re always on the move from location to location. Others need flexibility with their digital gear, especially the ability to insert a headphone amp into virtually any system and achieve impressive sonic performance. The new ADL A1 headphone amplifier/ DAC is designed for both of these digital enthusiasts—even if they’re the same person!

The new ADL A1 is a high-resolution portable headphone amplifier and DAC that can be used with Android devices such as ADL’s own X1 and iDevices. The A1 is also DSD-capable when used with either Mac or PC. The high-resolution sound that can be achieved through the A1 makes it perfect for portable audio enthusiasts who use the highest quality headphones to delve deeply into a recording. It’s also ideal for those who want to run DSD 2X on either a laptop or a desktop.

While the ADL A1 is certainly small enough to be portable and convenient, it’s also loaded with innovative features such as:

• USB Mini-B socket for USB A output from a PC/Mac for music and to charge the battery

• USB A socket for Android music devices via OTG cable

• Optical and line out that combines a 3.5mm phone jack for line out with a mini-jack for optical output

• Additional 3.5mm jack for headphone output

• USB 2.0 high-speed compliance with DSD (2.8M and 5.6M data both supported), with the ability to sample 8, 16, 32, 44.1, 48, 88.2, 96, 176.4 and 192 kHz sampling rates, indicated by LEDs on the front panel

• Switchable between USB-A, USB-mini B and optical inputs

The portable audio enthusiast will also appreciate the A1’s long battery life. While the battery in the A1 lasts approximately 7.5 hours after a full charge, it can be completely recharged in around 5 to 5.5 hours. That provides an exceptional amount of flexibility for playback while on the go. Down time and scheduling concerns will be minimized.

The ADL A1 is a truly versatile portable headphone amplifier and DAC. It’s flexible enough to be used in a countless number of applications, it’s small enough to fit just about anywhere and the sound quality is extraordinary. You’ll appreciate the signature Furutech sound in every component offered by ADL—smooth yet detailed and focused. The ADL A1 is clearly an example of innovative Japanese design at the cutting edge of technology. Are you ready for it?


High-performance CIRRUS LOGIC CS4392K 24bit/192kHz DAC chip (accepts PCM data and DSD audio data )

Controller supports ASIO and Asynchronous mode

VIA VT1736 32bit/192kHz USB chip ,USB 2.0 High Speed compliant accepts DSD 2.8M or 5.6M signal & 44.1 /48 /88.2 /96 /176.4 /192 kHz sampling rates supported

TEXAS INSTRUMENTS TPA6130A2 Headphone Amplifier chip -TPA6130A2 high fidelity Stereo Headphone Amplifier with an SNR of 98 dB

OP AMP: TI- LME49726 High Current, Low Distortion, Rail-to-Rail Output Audio Operational Amplifier

Max Headphone Output Levels (at 1%THD 1KHz) : 70mW(12 ohm), 80mW(16 ohm), 65mW(32 ohm), 38mW(56 ohm), 9mW(300 ohm)

Charge Time: approximately 7 hours approx. (DC 5V, 0.5A USB bus power)

Charge Time: approximately 5~5.5 hours approx.(AC/DC 5V, 1.0-2.0A switching adaptor)

Music Playback Time: Up to 7.5 hours when fully charged

Size: 68(W) x 118(D) x 16.5(H)mm

Weight: 150g approx.


USB Mini-B socket: For USB A output from a PC/MAC for music and to charge battery

USB A socket : For Android Device music output via OTG cable (USB A to micro-B type)

Optical and Analog out : Combined 3.5mm phone jack for Analog out and mini optical jack for optical output (24bit/192kHz Max.)

A second 3.5mm phone jack for headphone output (12~300 ohm range)
(When using both 3.5mm headphone Analog out jacks simultaneously it is advisable to use near impedance headphones)

Optical Input: For digital signal from external device (24bit/192kHz Max.)

Line input : 3.5mm(4-pin) phone jack for analog input (switched/When headphones are plugged in there is no Android signal output)

Switchable between USB-A input (Android /Line in), Optical Input and USB-miniB (PC/MAC

Supports DSD64 (2.8MHz) and DSD128 (5.6MHz)

Digital inputs for Android, PCs, Optical (Optical out supports Android digital signal)

DD Converter (3.5mm TOSLINK optical output)

High-performance 24-bit/192kHz DAC chip

supports ASIO and Asynchronous mode

Low Jitter

Fits in the palm of your hand

Enjoy music anywhere, on your desk or on the go

Doesn’t draw power from connected Android Device battery

.Front Controls and Indicators:

. Headphone and Analog out-1 (4-pin) : 3.5mm phone jack for headphones output 

. 3.5mm Optical input jack: for SPDIF signal 24bit/192kHz Max. 

.Line input (4-pin): 3.5mm phone jack (switched) for analog source input (When 3.5mm Line In jack is used Android digital signal input is deactivated) 

.Volume: Rotary-type variable resistor with power on/off 

.Charging Indicators: Three colors: RED, GREEN and ORANGE LED RED indicates charging/GREEN indicates full charge/ORANGE indicates low charge 

. Line input and Headphone out-1 (4-pin): ADL A1 Headphone Out supports 4pin 3.5mm headphones and earphones with remote and mic when the source is connected to the Line In jack with a 4pin 3.5mm stereo cable 


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