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Stereo integrated amplifier with built-in DAC (Black)
Item #: 158UDA1B
This item is no longer available.
Our take on the Sony UDA-1 by Crutchfield's David Brown
Turn your computer into an audiophile-grade music source
Computers are great sources for music except for one glaring problem: they don't sound very good. That's where a high-quality digital-to-analog converter, or DAC, will help by transforming your digital audio files into sweet-sounding music. Sony's UDA-1 does just that, with all kinds of formats, including high-resolution DSD and FLAC files. Better yet, it's also an integrated amplifier, so it can power your speakers and accept other sources like CD players, an iPod® or other portable device, and even a turntable with a preamp. The UDA-1's small footprint makes it a great fit for a high-performance desktop system alongside your computer and bookshelf speakers.
Handles DSD and other high-res formats
There are lots DACs out there capable of decoding high-resolution files in formats like FLAC and AIFF. But the UDA-1 also offers full support for Direct Stream Digital, or DSD, a Sony-developed format first used in Super Audio CD. These high-resolution files offer sound that, for many listeners, is closer to analog than digital has ever come. With more record labels, including Sony Music, rolling out DSD downloads, this DAC offers the versatility to enjoy this exciting format as well as many others.
Make all your digital tunes shine
Besides DSD, the UDA-1 handles the most popular digital audio formats, from MP3s to CD-quality lossless and high-res files. The Digital Sound Enhancement Engine helps make even low bitrate files sound their best by digitally restoring high frequencies that are lost in file compression. So whether you're playing old MP3s downloaded from iTunes® or high-res downloads from sites like HDtracks, the UDA-1 will deliver them with rich detail and smoothness.
It's also an integrated amp
The UDA-1 makes a great standalone DAC as part of a hi-fi stereo system. But if you're setting up a desktop system with your computer, connect a pair of bookshelf speakers and let the UDA-1 also serve as an integrated amp. The dual-mono circuit layout minimizes interference between the left and right channels for faithful reproduction of your music. And the rigid chassis with aluminum top and front panels prevents vibration-induced distortion from creeping into playback. Need more power? You can use the UDA-1 as a preamp and connect it to a power amplifier to drive more demanding speakers.
What's in the Box:
- USB DAC Amplifier
- 6.5' AC power cord
- Remote control (RM-ANU182)
- CR2025 3V battery (installed in remote)
- 4' USB type-B to USB type-A cable
- Reference Guide
- Quick Start Guide
- Warranty Information
- Online Product Registration
- 20 watts x 2 into 4 ohms (20-20,000 Hz) at 10% THD
- built-in digital-to-analog converter decodes high-resolution digital music files, including DSD (up to 5.6448 MHz) and FLAC (up to 24-bit/192 kHz)
- compatible file formats: DSD (.dsf, .diff), WAV, AIFF, FLAC, ALAC (Apple Lossless), MP3, AAC, WMA, ATRAC, (unprotected, 2-channel files for all formats)
- Digital Sound Enhancement Engine (DSEE) restores high-frequency signals to compressed digital formats like MP3 for more natural, expansive sound (settings: On, Off, and Auto)
- asynchronous USB (Type B) input for connection to a computer (requires driver download)
- front-panel USB (Type A) input for connecting compatible smartphones, including an iPod or iPhone®
- frequency response: 10-100,000 Hz
- digital inputs: 1 optical, 1 coaxial
- 1 pair of stereo RCA inputs
- 1 pair of analog stereo outputs for connection to a separate amplifier
- binding-post speaker terminals
- full-sized (1/4") headphone jack
- detachable power cord
- remote control
- 8-3/4"W x 2-7/8"H x 11-15/16"D
- weight: 8.9 lbs.
- warranty: 1 year
- Our 60-day money-back guarantee
Features and Specs
|Watts RMS per Channel (8-ohms)||0|
|Watts RMS per Channel (6-ohms)||0|
|Watts RMS per Channel (4-ohms)||20|
|Minimum Impedance||4 ohms|
|Signal to Noise Ratio||Not Given|
|Digital Music Features|
|Built-in DAC (Digital to Analog Converter)||Yes|
|High-resolution Audio Playback||ALAC, AIFF, FLAC, WAV, DSD|
|Total Analog Inputs||1|
|Optical Digital Inputs||1|
|Coaxial Digital Inputs||1|
|Dimensions and Warranty|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
High Quality Construction: The Sony UDA-1 USB DAC Amplifier features solid aluminum (3mm thick) construction. The UDA-1 employs an acoustically tuned, custom block capacitor and concentrates all its audio signal paths into a single ground point to eliminate fluctuation of left- and right-channels, and contributes to dynamic sound.
Digital Sound Enhancement Engine (DSEE): When turned on, the DSEE offers natural sound with a spacious feel by restoring high frequency sound and the tail shape of the waveform that likely disappears during the audio compression process.
Analog FIR Filters: This digital-to-analog converter effectively reduces high-frequency noise in DSD signals. It features independent right and left channels, with four analog FIR (Finite Impulse Response) filters per channel producing a combined one-clock delay. FIR filters are ideal for D/A conversion of DSD signals.
USB (type-B) Port For Computer Audio: The Sony UDA-1 features an asynchronous USB (type-B) port which can be used to connect the USB DAC Amplifier to a free USB (type-A) port on your Windows or Mac computer for music playback. You'll be able to use any music player like iTunes, Windows Media player, Media Go, or Sony's Hi-Res Audio Player software to enjoy high-resolution music stored on your computer. Your computer must meet the following system requirements:
|OS||Version||Browser||Additional Driver||USB Port|
|Windows||8 (32/64bit), 7 (SP1-32/64bit), Vista (SP2-32/64bit), or XP (SP3-32/64bit)||Internet Explorer 8, FireFox, or Google Chrome||Requires additional driver||USB 2.0 Compliant|
|Mac OS X||10.6.8, 10.7.4, or 10.8.4||Safari ver. 5 or later, FireFox, or Google Chrome||Additional driver not required|
Note: The UDA-1 provides no control over your computer's music. You will continue to use the music player on your computer to navigate your music and view song/artist information.
Supported Audio Formats: The Sony UDA-1's built-in digital-to-analog converter decodes the following high-resolution digital music files with true sound closer to the original master.
- DSD DFF (2.8/5.6MHz): Direct Stream Digital-DFF is the professional, uncompressed 1-bit format used in recording and mastering Super Audio CDs.
- DSD DSF (2.8/5.6MHz): Direct Stream Digital-DSF represents a PC-friendly version of 1-bit DSD used to burn files onto DVD.
- PCM: CD audio quality recording (44.1k/48k/88.2k/ 96k/176.4k/192kHz, 16/24/32-bit).
- WAV: The Waveform Audio File Format captures music as uncompressed, linear PCM and is a mainstay of computer audio.
- FLAC: The Free Lossless Audio Codec saves space by compressing files while maintaining 100% bit-for-bit accuracy during playback.
- AIFF: The Audio Interchange File Format also records uncompressed, linear PCM and was developed by Apple.
- ALAC: The Apple Lossless Audio Codec also maintains 100% bit-for-bit accuracy while saving storage space.
- Others: MP3, WMA, AAC, ATRAC, and ATRAC Advanced Lossless.
Sony's Hi-Res Audio Player: Sony's Hi-Res Audio Player (for Windows or Mac) is player software that allows you to play back high-quality audio files stored on your computer through the UDA-1. You can play back high-resolution audio files, such as DSD files, purchased in music distribution websites, simply by connecting the USB DAC amplifier to your computer via USB. You'll be able to create, save, and edit playlists, and play your favorite music in any order.
Front-Panel USB Port (Apple & Sony Compatible): You can connect
select Sony or Apple devices to the USB (type-A) port on the front-panel of the USB
Amplifier using the USB cable that came with your mobile device and enjoy music playback from that device through the UDA-1's connected speakers or headphones. The UDA-1 will also charge your Sony or Apple device while connected. You will continue to navigate your music and view song/artist information from your mobile device. Compatible devices include (as of 1/22/2014):
- Sony: Xperia and Walkman (w/ Android 2.3 or later)
- Apple: iPhone (2G/3G/3GS/4/4S/5/5C/5S), iPod touch (1st/2nd/3rd/4th/5th gen), iPod classic (80/120/160GB), and iPod nano (3rd/4th/5th/6th/7th gen)
Note: The front-panel USB port does not support USB thumbdrives, computers, HDDs or other Android and Apple devices not listed.
Digital Inputs: The Sony UDA-1 is also equipped with one optical (toslink) and one coaxial (RCA) digital input for connection of a CD player, SACD player, DVD player, or Blu-ray player. The digital inputs only support 2ch PCM and do not decode 5.1ch (Dolby Digital/DTS).
Analog Inputs & Outputs: The USB DAC Amplifier features a stereo analog RCA input to connect an external analog audio source. A stereo analog RCA output lets you use the UDA-1 as an external DAC for your your home stereo system.
Two-Channel Class AB Amplifier: This analog 20W x 2Ch (in 4ohm) Class AB amplifier utilizes an EBT (emitter balance transistor) with a cutoff frequency of over 300MHz for the final transistor. The amp device features minimal phase variation up to the high range and excellent transient response. Its twin mono format with separate left and right channels eliminates left-right sound interference and ensures clear, high-quality sound reproduction. The resilient high range reproduces sound with rich musicality and a high degree of faithfulness.
Binding Post Speaker Terminals: The USB DAC Amplifier is equipped with a set of binding post speaker terminals to connect a pair of loudspeakers. The binding post speaker terminals will accept bare wire (up to 12-gauge), banana plugs (single/dual), or pin-connectors. The amplifier can accept 4-ohm to 16-ohm speakers.
Note: Switch the unit's rear-panel Equalizer switch to "Bypass" when you use speakers other than Sony's SSHA3 speakers (sold separately).
Headphone Output: When headphones are plugged into the full-size 1/4" jack on the front-panel, the speaker outputs are automatically muted.
Remote Control: The UDA-1 comes with an IR remote for wireless operation of the USB DAC Amplifier's input and audio controls. You will continue to navigate your music from your computer or mobile device.
Auto Standby: If you switch the Auto Standby switch on the rear-panel of the USB DAC Amplifier to "ON", when you are not using the USB DAC Amplifier or there is no digital signal input to the UDA-1 for 20 minutes, the unit will automatically turn off and enter standby mode to reduce the power consumption.
Protection Circuit: When an abnormal current is output to the speaker terminals, or when the internal temperature of the USB DAC Amplifier is too high, all the input indicator lamps flash for 5 seconds, and the UDA-1 turns off automatically.
Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.
5 questions already asked
I forwarded your question to an Advisor and they responded with the following: Yes it will. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy Sep 14, 2015 ] Staff
I forwarded your question to an Advisor and they responded with the following: The 158UDA1B is considered a stereo reference piece that is designed for 2-channel audio only. There is not a subwoofer preamp output on that unit. You could use the standard audio output or the speaker line out if your subwoofer supports that connection. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy Aug 26, 2015 ] Staff
I forwarded your question to an Advisor and they responded with the following: The Sony UD-A1 does have a set of RCA preamp outputs so that you can connect it to another amplifier and bypass the internal amplifier. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy May 14, 2015 ] Staff
As long as the powered speakers have standard inputs it can be used this way. You would use the stereo mini-jack (headphone) output to connect to powered speakers. Analog Output: A stereo analog RCA output lets you use the UDA-1 as an external DAC for your your home stereo system. [ Jeff Aug 12, 2015 ] Staff
1 answer The Total Harmonic Distortion is listed as 10%. I even found that figure on the Sony site: "Equipped with large, gold-plated screw terminals for solid connectivity with high-grade speaker cables and pin jacks, the UDA-1 can deliver 20 Watts (4 Ohms, 20 Hz - 20 kHz, THD 10%), stereo sound to a pair of speakers." TEN PERCENT???? Isn't that rather high? Has everyone lost a decimal point? [ R Aug 04, 2015 ]
No idea. I think I had a unit like that and it sounded okay. Why can't one get a DAC + AMP which is not made using slave labor (de facto if not de jure) where the toxic waste is poured into the villagers' community or just by the plant causing irreparable ham to women, children, workers and the environment? They should manufacture these here in the U.S. I'm Union shops abiding by the most stringent environmental and labor (OSHA) standards and LAWS. Sony et al cuts cists by poisoning those poor people, destroying magnificent and ancient lands and has the nerve to charge us as if those cists had not been displaced and saved! [ Patrick Aug 05, 2015 ]