FURUTECH ADL Stratos. MM and MC phono preamplifier with USB-B output for PC and headphone amplifier

Known the world over as "the Swiss Army Knife of audio components" when it was introduced, the legendary and groundbreaking ADL GT40 revolutionized the home entertainment industry when it came to managing computer-based music systems. However, the innovative new ADL STRATOS is poised to raise the bar even higher with more features and even better performance.

ADL STRATOS is more than just a DAC, phono stage and headphone amp in one small, portable box. With STRATOS you get DSD (2.8M, 5.6M and 11.2M), USB (supports PCM 24~32bit/384kHz Max.) and ADC (24bit/192kHz Max.), so you'll be able to manage the largest music collections in your hard drive with ease and flexibility, and exceptional sound quality.

Whether you need to convert your LPs or other analog sources to digital or record audio streamed over the Internet, STRATOS offers a wide variety of options to help you get the best sound results. With its low-latency USB 2.0 audio controller that plays at 384kHz and records at 192kHz and its built-in high-performance MM/MC phono stage, you can easily record your favorite albums to hard drive via USB. Best of all, you'll enjoy Furutech's signature detailed, clear yet smooth sound when you use ADL STRATOS as the heart and soul of almost any desktop system.

If you're looking for a powerful headphone amp that can drive any pair of headphones on the market, STRATOS has it for you. Whether you're using the latest generation of headphones or the most revealing electrostatic audio speakers available, ADL STRATOS will let you venture out and explore deeper into recording than ever before. That's because every ADL product is built with the best materials, as well as the most innovative Japanese design principles. STRATOS may be small, but they pack an amazing amount of technology.

Additional features include analog L/R inputs, line or phono inputs (switchable MM/MC), optical and coaxial S/PDIF inputs, optical S/PDIF output (for USB, optical, coaxial), and a driver that supports ASIO and asynchronous STRATOS modes also use the best Furutech connectors to deliver high quality sonic results. In fact, STRATOS is much more than a classic GT40 with DSD capabilities: every square inch of STRATOS has been reconsidered and rethought using the latest technology and designs.

The original GT40 certainly shook up the audio world when it redefined the level of performance, flexibility, and audio features available at an affordable price. With the ADL STRATOS, however, a new revolution has begun. It certainly qualifies as more than just a new "Swiss blade of audio components." It is a completely new way of thinking.

Product specifications:

USB Playback Resolution: Support PCM 24~32bit/384kHz (Max)

USB recording resolution: 24bit / 192kHz (max)

Frequency response: 20Hz ~ 20KHz (+/- 0.5dB)

SN Ratio (A-WTD): >96dB/Line Out, >60dB/MC Out, >70dB/MM Out

Analog output level: 5.0 Vrms

Line input level: 2 Vrms S/PDIF input: 24 bit / 192 KHz (max.)

MC/MM input level: MC: 0.4mV / MM: 4.0mV

Input capacitance MC: 1000 PF - MM Input capacitance: 100 PF

Line Input Impedance: MC: 100 ohms / MM: 47K ohms / Line: 47K ohms

Balanced Output Level for Headphones (4-Pin XLR): 1% THD 1 kHz (max)

400mW (12 ohms), 800mW (16 ohms), 1200mW (32 ohms), 2200mW (56 ohms), 700mW (300 ohms), 350mW (600 ohms)

Unbalanced Headphone Output Level (1/4" stereo phone jack): 1% THD 1 kHz (max)

1100mW (12 ohms), 1400mW (16 ohms), 1000mW (32 ohms), 820mW (56 ohms), 190mW (300 ohms),

100mW (600 ohms)

Power Supply AC Adapter Classification: Erp step2 Compatible, 2-Wire AC Input Type,

Class II, AC/DC DC 15V/0.8A/12W switching adapter output

Dimensions: 215(W) x 180(D) x 64(H)mm

Weight: 1330g Approx.

STRATOS does not have any gain adjustment to match different impedance headphones.

We recommend using headphones with an impedance of 12 ohms to 600 ohms.

Integrated XMOS High Speed ​​USB 2.0 PHY providing 480Mbps data rates and USB Audio Class 2.

PCM 24 ~ 32 bit / 384kHz (max.) Sample rates supported. (*Note-32bit will not display on computer)

High speed USB 2.0 compliance with DSD (2.8M, 5.6M and 11.2M data supported), with the ability to sample at 44.1, 48, 88.2, 96, 176.4, 192, 352.8 and 384 kHz sample rates, indicated by LEDs on the front panel

ESS ES9018K2M SABRE32 Stereo DAC Reference: Audiophile Grade (DSD /2.8M, 5.6M, 11.2M compatible)

32-bit 384kHz DAC chip

Analog to Digital Converter - The STRATOS has a high performance CS5340 ADC chip for high resolution recordings via analog inputs including phono, AM/FM radio or other analog signals to PC or MAC hard drive

24bit / 192kHz max.)

Ultimate high-end linear volume control: 2-channel electronic volume that allows volume to be preset for each input (Phono, Line, USB).

Three powerful headphone amps: STRATOS has three powerful TI TPA6120A2 headphone amps: one pair drives the left and right channels of the balanced XLR (4-pin) output (unswitched), and the third feeds the stereo phone jack output of 6.3mm (changed). (TI TPA6120A2 drives 12 to 600 ohms at >120dB dynamic range)

ASIO (Windows); Plug 'n Play (MAC)

Line, ADC and DAC OPA: TI NE 5532 OP Amp, PHONO OPA: JRC NJM2068DD OP Amp

Coaxial and optical S/PDIF input: If the playback sample rate cannot be set at the source, the coaxial and optical LED will indicate so (maximum sample rates of 24-bit/192kHz are supported)

Optical S/PDIF output (for USB, optical and coaxial) Max. 24bit/192kHz.

Convenient clip signal toggle switch for recording attenuation: Adjust the recording attenuation to avoid any distortion during recording: -6dB, 0dB or +6dB (Rec/dB signal light turns on when input level exceeds circuit gain).

Phono Preamp - The STRATOS features a phono EQ for recording your precious LPs. Switch between moving magnet (MM) and moving coil (MC) or line input

Dual external power supply:

Power Supply: 1: 5 VDC from USB bus powered by USB chip only.

Power supply 2: external AC/DC switching adapter output DC 15V/800mA/12W

IMPORTANT NOTICE OF USE:

When connecting the STRATOS directly to a power amplifier or power speakers, a "pop" noise may be heard from the speakers when the STRATOS is turned on or off. To avoid "pop" noise and potential speaker damage, follow these instructions:

Turn off the STRATOS: First, turn off the speakers/power amps: second, turn off the STRATOS.

Turning on the STRATOS: First, turn on the STRATOS; second, turn on the speakers/power amp