So Macs have good internal DACs, can someone comment on how much better this unit makes music sound while running off a Mac (I have a 2013 Mac Air)?

I disagree with KM. Haven't tried this AudioEngine DAC, but the NUforce Mac-specific DAC I own makes a noticeable difference, mostly in the clarity of the highs. It makes the Mac's built-in DAC sound shrill. On lower-end headphones it might not be detectable. And, of course, everyone's hearing is different. I can listen to Google Play streaming much longer on my Sennheiser HD280 Pro headphones through an external DAC than without one.

Will the analog outputs be bypassed if a headphone is connected at the same time?

Yes Zack. The analog RCA's are disconnected if headphones are plugged into the D1. I wish it was a bit more flexible but that's the way it is with this unit.

Does this DAC require LPCM or PCM in S/PDIF input signal. Most TV has option to output in PCM format but not all. My LG DU-37LZ30 has DTS/AC-3 output

From the FAQ on Audioengine's site:Q: The D1 is connected to the optical output of my TV but I'm not getting any sound. What can I do?A: In your TV menu verify that "PCM STEREO" is selected and "DOLBY DIGITAL" is off.So it presumably only supports PCM over S/PDIF.

I see the d1 has usb input. i don't have a sound card in my pc, do i still need to get one if i get d1 to improve the sound quality? thanks.

The D1 functions as a soundcard, so no, you do not need another sound card. Plug the D1 into the USB port on your computer, and an amplifier or headphones into the D1, and enjoy your music!

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Audioengine D1 Desktop DAC and Headphone Amplifier – 32-Bit USB DAC, Preamp and Headphone Amp for PC, Mac, Gaming and Music

Audioengine D1 Desktop DAC and Headphone Amplifier – 32-Bit USB DAC, Preamp and Headphone Amp for PC, Mac, Gaming and Music

Product ID: 1624207

Details

Brand
Audioengine
Maximum Supply Voltage
5 Volts (DC)
Minimum Supply Voltage
5 Volts (DC)
Mounting Type
Portable
Number of Pins
3

🎧32-bit HiFi DAC precision

📏Compact 4x3 inch footprint

🔄Seamless headphone/speaker switch

C$44716

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Description

🎶 Unlock your desk’s sonic potential with the Audioengine D1 — where pro-grade sound meets sleek simplicity.

COMPACT POWERHOUSE - Sleek 4x3 inch design keeps your workspace minimalist and clutter-free while delivering maximum audio impact.
STUDIO GRADE 32 BIT DAC - Experience pristine, CD-quality audio that elevates every track and game soundscape.
UNIVERSAL COMPATIBILITY - Plug-and-play with PC, Mac, laptops, tablets, and cellphones for versatile, on-the-go audiophile quality.
EFFORTLESS AUDIO SWITCHING - Toggle instantly between private headphone listening and shared speaker sessions without missing a beat.
BUILT TO LAST WITH CONFIDENCE - Durable metal chassis backed by a 3-year warranty ensures your sound investment stands the test of time.

The Audioengine D1 is a compact, metal-encased desktop DAC and headphone amplifier delivering 32-bit, 24-bit, and CD-quality audio. Designed for seamless switching between headphones and speakers, it supports PC, Mac, and mobile devices, making it ideal for gamers, music lovers, and professionals seeking premium sound in a minimalist footprint. Backed by a 3-year warranty, it combines durability with high-fidelity performance.

Specifications

ASIN	B006IPH5H2
Best Sellers Rank	#80,574 in Electronics ( See Top 100 in Electronics ) #140 in Headphone Amps
Brand	Audioengine
Brand Name	Audioengine
Compatible Devices	Cellphones, Desktops, Laptops, Tablets
Customer Reviews	4.4 out of 5 stars 1,001 Reviews
Global Trade Identification Number	00819955250039
Included Components	Quick Start Guide
Interface	USB
Item Dimensions L x W	3.75"L x 3.5"W
Item Weight	5 Ounces
Manufacturer	Audioengine
Material Type	Metal
Maximum Supply Voltage	5 Volts (DC)
Minimum Supply Voltage	5 Volts (DC)
Model	D1
Mounting Type	Portable
Number of Channels	1
Number of Pins	4
Part Number	D1
UPC	819955250039
Unit Count	1.0 Count
Upper Temperature Rating	95 Degrees Fahrenheit
Warranty Description	3 Year Warranty

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