Very good condition in original packaging.

A Portable Headphone Amp with Impeccable Sound Sweetwater is an Authorized Grace Design Dealer Genuine Open Box Item Sweetwaters 2-year warranty Grace Design m900 - Desktop DAC Headphone Amplifier 2-ch Headphone Amplifier with Stereo Unbalanced Analog Outputs, Digital Input via USB, TOSlink, and S/PDIF Coax, and Support for 44.1kHz-384kHz PCM and 64X-256X DSD Audio - Mac/PC A Portable Headphone Amp with Impeccable Sound Grace Designs m900 takes the stunning detail and flawless imaging of their flagship m920 headphone amplifier and packs it into a portable, bus-powered unit. But just because the m900 is portable, doesnt mean its lacking. Experience jitter-free computer audio playback, with support for up to 32-bit/384kHz PCM and 256x DSD. Dual zero-ohm output impedance headphone outputs deliver spacious and transparent performance, while stereo unbalanced analog outputs make connecting to your stereo monitor system easy. Either way, four different DAC filter settings provide personalized playback. At Sweetwater, we appreciate the m900s simple setup menu and easy-to-read 7-segment LED display, and its large rotary encoder makes volume control and menu navigation a breeze.Grace Design M900 Features: 2-ch headphone amplifier and top-shelf D/A converter Portable bus-powered unit is ideal for travel, desktop, or studio Jitter-free computer audio playback with support for up to 32-bit/384kHz PCM and 256x DSD Dual zero-ohm output impedance headphone outputs deliver spacious and transparent performance Stereo unbalanced analog outputs make connecting to your stereo monitor system easy Compatible with a wide variety of digital sources via USB, TOSlink, and S/PDIF coax 4 different DAC filter settings provide personalized playback Simple setup menu and easy-to-read 7-segment LED display Large rotary encoder for easy volume control and menu navigation SpecificationDetail Type Headphone Amp & DA Converter Input Channels Stereo Output Channels 2 Analog Outputs 2 x RCA (stereo) Headphones 2 x 1/4 TRS Digital Inputs 1 x Coax (S/PDIF), 1 x Optical Toslink USB 1 x Micro-B (high power), 1 x Micro-B (data, bus power) Form Factor Portable Power Supply USB bus powered Height 1.8 Width 4 Depth 5.25 RETURN INFORMATION We want you to be completely happy with your purchase from Sweetwater. If you are not satisfied with your product, you may return it for a refund of the purchase price within 30 days. If your purchase was eligible for Free Shipping, the shipping cost will be deducted from your credit or refund. Returns must be in the complete and original packaging with all accessories and complete documentation (Owners Manual, warranty card, quick start guides, etc.), show no signs of wear or use, and include a Return Authorization number or be subject to a restocking fee. Fast, FREE Shipping! Nearly every order received by 3PM Eastern ships the SAME DAY! FREE shipping to lower 48 states. Our central location reaches most states in 1-4 business days 99.95% warehouse accuracy We are proud to provide some of the fastest turnaround times on eBay. We use FedEx or UPS for most items, and USPS for smaller items. Residents of Hawaii, Alaska, and Puerto Rico should contact us for a shipping quote. PLEASE NOTE: We cannot ship large items to PO boxes, please provide an alternate address. If you have questions, feel free to contact us. Buy with confidence! Sweetwaters been selling on eBay since 2001, with 99.9% positive feedback! More than 30 years in business World-class customer service Fast, FREE shipping Free 2-year warranty on nearly every product Free tech support from audio experts

Grace Design M903 Referenz Kopfhörerverstärker mit DAC + Fernbedienung aus 12/2013 OriginalverpackungImmer noch ein wirklich gutes Gerät aus der professionellen Studiotechnik

Made in collaboration with Grace Design, a company known for its incredibly accurate, transparent studio gear, the Standard DAC sets a new standard in entry-level DACs. It applies Grace Designs pro-audio expertise to a simpler, more accessibly priced model that makes a great addition to any home or office system. Designed with the objectivist audiophile in mind, the SDAC delivers objectively good performance meant to meet or exceed the measurements of the popular ODAC while retaining many of its other benefits. Compact, capable, and easy to use, it could be all the DAC you need.

Excellent DAC/ AMP combo. Sounds really good. Accepts 1/4 and XLR connections, used both a various times with great results. NO box or instructions so you must be able to connect on your own, pretty easy though. Upgraded USB Cable (Audioquest) for connection from computer to unit, provided The only other connection is power from unit to outlet with supplied power cable. Just listened to my phone through RCA inputs and it sounded great. Usually listen via USB connection on my computer so it was good to know it works well both ways. Prefer computer setup. Great little system. Looks better in person, like me.

SPECS DAC Section Massdrop xGrace Design DAC chip: AKM AK4452 Audio formats: Up to 24 bit/96 kHz Frequency response, 20Hz20 kHz: +/-0.02 dB THD+N at 20 Hz -0.15 dBFS: 0.0013% THD+N at 100 Hz, -0.15 dBFS: 0.0013% THD+N at 10 kHz, -0.15 dBFS: 0.0024% IMD CCIF, -6.03 dBFS, 19/20kHz, 24/96k: 0.0005% IMD SMPTE -6 dBFS, 24/96k: 0.0015% Noise, A-weighted: -105 dBu Dynamic range, A-weighted: >114 dB Linearity, -90 dBFS: -0.07 dB Crosstalk at 1 kHz, -10 dBFS (3.5mm jack): -102 dB Sum of jitter components at 11,025 Hz, -1 dBFS: -133 dB Maximum output: 2.15VRMS USB controller: XMOS XU208-128-TQ64 Inputs: USB micro Output: RCA Power: USB Class 1 (no drivers required for Windows, Mac, or Linux) Amp Section Input: RCA, SDAC (when powered) Output: 6.35 mm Power: AC adapter included(purchase separately: plug adapter for your countrys outlet) Gain: 1.0x and 3.3x Frequency response: +/-0.1 dB (20 Hz20 kHz) THD (1 kHz, 150 ohms): 0.0016% IMD CCIF (15 ohms): 0.001% IMD SMPTE: 0.002% Noise (ref 400 mV): -105 dB Max output (33 ohms): 613 mW Max output (150 ohms): 355 mW Max output (600 ohms): 88 mW Output impedance: 0.54 ohms Crosstalk (15 ohms): -65 dB Channel balance (50% volume): 0.6 dB Physical Front in (6.35 mm)output Rear RCA input/output Rear microUSB Rear power Chassis material: Anodized aluminum Case dimensions: 4.12 x 3.87 x 1.12 in (10.46 x 9.82 x 2.85 cm) Weight: 9.28 oz (263 g)

SPECS DAC Section Massdrop x Grace Design DAC chip: AKM AK4452 Audio formats: Up to 24 bit/96 kHz Frequency response, 20Hz–20 kHz: +/-0.02 dB THD+N at 20 Hz -0.15 dBFS: 0.0013% THD+N at 100 Hz, -0.15 dBFS: 0.0013% THD+N at 10 kHz, -0.15 dBFS: 0.0024% IMD CCIF, -6.03 dBFS, 19/20kHz, 24/96k: 0.0005% IMD SMPTE -6 dBFS, 24/96k: 0.0015% Noise, A-weighted: -105 dBu Dynamic range, A-weighted: >114 dB Linearity, -90 dBFS: -0.07 dB Crosstalk at 1 kHz, -10 dBFS (3.5mm jack): -102 dB Sum of jitter components at 11,025 Hz, -1 dBFS: -133 dB Maximum output: 2.15VRMS USB controller: XMOS XU208-128-TQ64 Inputs: USB micro Output: RCA Power: USB Class 1 (no drivers required for Windows, Mac, or Linux) Amp Section Input: RCA, SDAC (when powered) Output: 6.35 mm Power: AC adapter included (purchase separately: plug adapter for your country’s outlet) Gain: 1.0x and 3.3x Frequency response: +/-0.1 dB (20 Hz–20 kHz) THD (1 kHz, 150 ohms): 0.0016% IMD CCIF (15 ohms): 0.001% IMD SMPTE: 0.002% Noise (ref 400 mV): -105 dB Max output (33 ohms): 613 mW Max output (150 ohms): 355 mW Max output (600 ohms): 88 mW Output impedance: 0.54 ohms Crosstalk (15 ohms): -65 dB Channel balance (50% volume): 0.6 dB Physical Front ¼ in (6.35 mm) output Rear RCA input/output Rear microUSB Rear power Chassis material: Anodized aluminum Case dimensions: 4.12 x 3.87 x 1.12 in (10.46 x 9.82 x 2.85 cm) Weight: 9.28 oz (263 g)

International Buyers Condition: UsedThis item works well.This is a used product, so there are some scratches on it. - Payment -The item will be shipped within 10 days after payment is confirmed. Shipping by FedEx or DHL.A tracking number will be provided. - Returns -Returns are accepted within 30 days of receiving the item.*However, return leg is the responsibility of the customer. Return Policy and 100% GuaranteeAny item that is defective beyond the description given on our site will be refunded.If the item delivered is defective, please contact us via email.However, you must return the item to us. - About us - Thank you for visiting my page.If you have any questions about this page, please feel free to ask.I will answer sincerely. -International Buyers -Import duties, taxes and charges are not included in the price of the item or the shipping cost. These charges are the responsibility of the buyer. Please check with your countrys customs office to determine how much these additional costs will be prior to bidding/purchasing. These charges are usually collected by the shipping freight (delivery) company or upon receipt of the goods. Please do not confuse them with additional shipping charges. Thank you:)

This is a Massdrop x Grace Design Standard Balanced DAC, purchased from Drop (Massdrop) upon its release. Great sound, perfect utility. Originally $150, this is a great way to get a balanced signal to an amp. Ships UPS Ground to continental USA. Thanks for looking!

SPECS DAC Section Massdrop xGrace Design DAC chip: AKM AK4452 Audio formats: Up to 24 bit/96 kHz Frequency response, 20Hz20 kHz: +/-0.02 dB THD+N at 20 Hz -0.15 dBFS: 0.0013% THD+N at 100 Hz, -0.15 dBFS: 0.0013% THD+N at 10 kHz, -0.15 dBFS: 0.0024% IMD CCIF, -6.03 dBFS, 19/20kHz, 24/96k: 0.0005% IMD SMPTE -6 dBFS, 24/96k: 0.0015% Noise, A-weighted: -105 dBu Dynamic range, A-weighted: >114 dB Linearity, -90 dBFS: -0.07 dB Crosstalk at 1 kHz, -10 dBFS (3.5mm jack): -102 dB Sum of jitter components at 11,025 Hz, -1 dBFS: -133 dB Maximum output: 2.15VRMS USB controller: XMOS XU208-128-TQ64 Inputs: USB micro Output: RCA Power: USB Class 1 (no drivers required for Windows, Mac, or Linux) Amp Section Input: RCA, SDAC (when powered) Output: 6.35 mm Power: AC adapter included(purchase separately: plug adapter for your countrys outlet) Gain: 1.0x and 3.3x Frequency response: +/-0.1 dB (20 Hz20 kHz) THD (1 kHz, 150 ohms): 0.0016% IMD CCIF (15 ohms): 0.001% IMD SMPTE: 0.002% Noise (ref 400 mV): -105 dB Max output (33 ohms): 613 mW Max output (150 ohms): 355 mW Max output (600 ohms): 88 mW Output impedance: 0.54 ohms Crosstalk (15 ohms): -65 dB Channel balance (50% volume): 0.6 dB Physical Front in (6.35 mm)output Rear RCA input/output Rear microUSB Rear power Chassis material: Anodized aluminum Case dimensions: 4.12 x 3.87 x 1.12 in (10.46 x 9.82 x 2.85 cm) Weight: 9.28 oz (263 g)

SPECS DAC Section Massdrop x Grace Design DAC chip: AKM AK4452 Audio formats: Up to 24 bit/96 kHz Frequency response, 20Hz–20 kHz: +/-0.02 dB THD+N at 20 Hz -0.15 dBFS: 0.0013% THD+N at 100 Hz, -0.15 dBFS: 0.0013% THD+N at 10 kHz, -0.15 dBFS: 0.0024% IMD CCIF, -6.03 dBFS, 19/20kHz, 24/96k: 0.0005% IMD SMPTE -6 dBFS, 24/96k: 0.0015% Noise, A-weighted: -105 dBu Dynamic range, A-weighted: >114 dB Linearity, -90 dBFS: -0.07 dB Crosstalk at 1 kHz, -10 dBFS (3.5mm jack): -102 dB Sum of jitter components at 11,025 Hz, -1 dBFS: -133 dB Maximum output: 2.15VRMS USB controller: XMOS XU208-128-TQ64 Inputs: USB micro Output: RCA Power: USB Class 1 (no drivers required for Windows, Mac, or Linux) Amp Section Input: RCA, SDAC (when powered) Output: 6.35 mm Power: AC adapter included (purchase separately: plug adapter for your country’s outlet) Gain: 1.0x and 3.3x Frequency response: +/-0.1 dB (20 Hz–20 kHz) THD (1 kHz, 150 ohms): 0.0016% IMD CCIF (15 ohms): 0.001% IMD SMPTE: 0.002% Noise (ref 400 mV): -105 dB Max output (33 ohms): 613 mW Max output (150 ohms): 355 mW Max output (600 ohms): 88 mW Output impedance: 0.54 ohms Crosstalk (15 ohms): -65 dB Channel balance (50% volume): 0.6 dB Physical Front ¼ in (6.35 mm) output Rear RCA input/output Rear microUSB Rear power Chassis material: Anodized aluminum Case dimensions: 4.12 x 3.87 x 1.12 in (10.46 x 9.82 x 2.85 cm) Weight: 9.28 oz (263 g)

SPECS DAC Section Massdrop xGrace Design DAC chip: AKM AK4452 Audio formats: Up to 24 bit/96 kHz Frequency response, 20Hz20 kHz: +/-0.02 dB THD+N at 20 Hz -0.15 dBFS: 0.0013% THD+N at 100 Hz, -0.15 dBFS: 0.0013% THD+N at 10 kHz, -0.15 dBFS: 0.0024% IMD CCIF, -6.03 dBFS, 19/20kHz, 24/96k: 0.0005% IMD SMPTE -6 dBFS, 24/96k: 0.0015% Noise, A-weighted: -105 dBu Dynamic range, A-weighted: >114 dB Linearity, -90 dBFS: -0.07 dB Crosstalk at 1 kHz, -10 dBFS (3.5mm jack): -102 dB Sum of jitter components at 11,025 Hz, -1 dBFS: -133 dB Maximum output: 2.15VRMS USB controller: XMOS XU208-128-TQ64 Inputs: USB micro Output: RCA Power: USB Class 1 (no drivers required for Windows, Mac, or Linux) Amp Section Input: RCA, SDAC (when powered) Output: 6.35 mm Power: AC adapter included(purchase separately: plug adapter for your countrys outlet) Gain: 1.0x and 3.3x Frequency response: +/-0.1 dB (20 Hz20 kHz) THD (1 kHz, 150 ohms): 0.0016% IMD CCIF (15 ohms): 0.001% IMD SMPTE: 0.002% Noise (ref 400 mV): -105 dB Max output (33 ohms): 613 mW Max output (150 ohms): 355 mW Max output (600 ohms): 88 mW Output impedance: 0.54 ohms Crosstalk (15 ohms): -65 dB Channel balance (50% volume): 0.6 dB Physical Front in (6.35 mm)output Rear RCA input/output Rear microUSB Rear power Chassis material: Anodized aluminum Case dimensions: 4.12 x 3.87 x 1.12 in (10.46 x 9.82 x 2.85 cm) Weight: 9.28 oz (263 g)

SPECS DAC Section Massdrop x Grace Design DAC chip: AKM AK4452 Audio formats: Up to 24 bit/96 kHz Frequency response, 20Hz–20 kHz: +/-0.02 dB THD+N at 20 Hz -0.15 dBFS: 0.0013% THD+N at 100 Hz, -0.15 dBFS: 0.0013% THD+N at 10 kHz, -0.15 dBFS: 0.0024% IMD CCIF, -6.03 dBFS, 19/20kHz, 24/96k: 0.0005% IMD SMPTE -6 dBFS, 24/96k: 0.0015% Noise, A-weighted: -105 dBu Dynamic range, A-weighted: >114 dB Linearity, -90 dBFS: -0.07 dB Crosstalk at 1 kHz, -10 dBFS (3.5mm jack): -102 dB Sum of jitter components at 11,025 Hz, -1 dBFS: -133 dB Maximum output: 2.15VRMS USB controller: XMOS XU208-128-TQ64 Inputs: USB micro Output: RCA Power: USB Class 1 (no drivers required for Windows, Mac, or Linux) Amp Section Input: RCA, SDAC (when powered) Output: 6.35 mm Power: AC adapter included (purchase separately: plug adapter for your country’s outlet) Gain: 1.0x and 3.3x Frequency response: +/-0.1 dB (20 Hz–20 kHz) THD (1 kHz, 150 ohms): 0.0016% IMD CCIF (15 ohms): 0.001% IMD SMPTE: 0.002% Noise (ref 400 mV): -105 dB Max output (33 ohms): 613 mW Max output (150 ohms): 355 mW Max output (600 ohms): 88 mW Output impedance: 0.54 ohms Crosstalk (15 ohms): -65 dB Channel balance (50% volume): 0.6 dB Physical Front ¼ in (6.35 mm) output Rear RCA input/output Rear microUSB Rear power Chassis material: Anodized aluminum Case dimensions: 4.12 x 3.87 x 1.12 in (10.46 x 9.82 x 2.85 cm) Weight: 9.28 oz (263 g)

Description: This product is unopened in the original box.This Grace Design m900 is a high-quality desktop DAC and headphone amplifier. It features a Burr-Brown DAC chip, a headphone amp with high output power and low output impedance, and a variety of input and output options. The m900 is perfect for audiophiles who want to get the most out of their music.This unit is in excellent condition and has been well-maintained. It comes with the original box, power cord, and remote control.Features:Burr-Brown DAC chipHeadphone amp with high output power and low output impedanceVariety of input and output optionsPerfect for audiophilesShipping:This unit will be shipped via USPS Priority Mail with tracking.Payment:Payment is accepted via PayPal.Please contact me if you have any questions.

SPECS DAC Section Massdrop x Grace Design DAC chip: AKM AK4452 Audio formats: Up to 24 bit/96 kHz Frequency response, 20Hz–20 kHz: +/-0.02 dB THD+N at 20 Hz -0.15 dBFS: 0.0013% THD+N at 100 Hz, -0.15 dBFS: 0.0013% THD+N at 10 kHz, -0.15 dBFS: 0.0024% IMD CCIF, -6.03 dBFS, 19/20kHz, 24/96k: 0.0005% IMD SMPTE -6 dBFS, 24/96k: 0.0015% Noise, A-weighted: -105 dBu Dynamic range, A-weighted: >114 dB Linearity, -90 dBFS: -0.07 dB Crosstalk at 1 kHz, -10 dBFS (3.5mm jack): -102 dB Sum of jitter components at 11,025 Hz, -1 dBFS: -133 dB Maximum output: 2.15VRMS USB controller: XMOS XU208-128-TQ64 Inputs: USB micro Output: RCA Power: USB Class 1 (no drivers required for Windows, Mac, or Linux) Amp Section Input: RCA, SDAC (when powered) Output: 6.35 mm Power: AC adapter included (purchase separately: plug adapter for your country’s outlet) Gain: 1.0x and 3.3x Frequency response: +/-0.1 dB (20 Hz–20 kHz) THD (1 kHz, 150 ohms): 0.0016% IMD CCIF (15 ohms): 0.001% IMD SMPTE: 0.002% Noise (ref 400 mV): -105 dB Max output (33 ohms): 613 mW Max output (150 ohms): 355 mW Max output (600 ohms): 88 mW Output impedance: 0.54 ohms Crosstalk (15 ohms): -65 dB Channel balance (50% volume): 0.6 dB Physical Front ¼ in (6.35 mm) output Rear RCA input/output Rear microUSB Rear power Chassis material: Anodized aluminum Case dimensions: 4.12 x 3.87 x 1.12 in (10.46 x 9.82 x 2.85 cm) Weight: 9.28 oz (263 g)

SPECS DAC Section Massdrop xGrace Design DAC chip: AKM AK4452 Audio formats: Up to 24 bit/96 kHz Frequency response, 20Hz20 kHz: +/-0.02 dB THD+N at 20 Hz -0.15 dBFS: 0.0013% THD+N at 100 Hz, -0.15 dBFS: 0.0013% THD+N at 10 kHz, -0.15 dBFS: 0.0024% IMD CCIF, -6.03 dBFS, 19/20kHz, 24/96k: 0.0005% IMD SMPTE -6 dBFS, 24/96k: 0.0015% Noise, A-weighted: -105 dBu Dynamic range, A-weighted: >114 dB Linearity, -90 dBFS: -0.07 dB Crosstalk at 1 kHz, -10 dBFS (3.5mm jack): -102 dB Sum of jitter components at 11,025 Hz, -1 dBFS: -133 dB Maximum output: 2.15VRMS USB controller: XMOS XU208-128-TQ64 Inputs: USB micro Output: RCA Power: USB Class 1 (no drivers required for Windows, Mac, or Linux) Amp Section Input: RCA, SDAC (when powered) Output: 6.35 mm Power: AC adapter included(purchase separately: plug adapter for your countrys outlet) Gain: 1.0x and 3.3x Frequency response: +/-0.1 dB (20 Hz20 kHz) THD (1 kHz, 150 ohms): 0.0016% IMD CCIF (15 ohms): 0.001% IMD SMPTE: 0.002% Noise (ref 400 mV): -105 dB Max output (33 ohms): 613 mW Max output (150 ohms): 355 mW Max output (600 ohms): 88 mW Output impedance: 0.54 ohms Crosstalk (15 ohms): -65 dB Channel balance (50% volume): 0.6 dB Physical Front in (6.35 mm)output Rear RCA input/output Rear microUSB Rear power Chassis material: Anodized aluminum Case dimensions: 4.12 x 3.87 x 1.12 in (10.46 x 9.82 x 2.85 cm) Weight: 9.28 oz (263 g)

Description: This product is unopened in the original box.This Grace Design m900 is a high-quality desktop DAC and headphone amplifier. It features a Burr-Brown DAC chip, a headphone amp with high output power and low output impedance, and a variety of input and output options. The m900 is perfect for audiophiles who want to get the most out of their music.This unit is in excellent condition and has been well-maintained. It comes with the original box, power cord, and remote control.Features:Burr-Brown DAC chipHeadphone amp with high output power and low output impedanceVariety of input and output optionsPerfect for audiophilesShipping:This unit will be shipped via USPS Priority Mail with tracking.Payment:Payment is accepted via PayPal.Please contact me if you have any questions.

SPECS DAC Section Massdrop xGrace Design DAC chip: AKM AK4452 Audio formats: Up to 24 bit/96 kHz Frequency response, 20Hz20 kHz: +/-0.02 dB THD+N at 20 Hz -0.15 dBFS: 0.0013% THD+N at 100 Hz, -0.15 dBFS: 0.0013% THD+N at 10 kHz, -0.15 dBFS: 0.0024% IMD CCIF, -6.03 dBFS, 19/20kHz, 24/96k: 0.0005% IMD SMPTE -6 dBFS, 24/96k: 0.0015% Noise, A-weighted: -105 dBu Dynamic range, A-weighted: >114 dB Linearity, -90 dBFS: -0.07 dB Crosstalk at 1 kHz, -10 dBFS (3.5mm jack): -102 dB Sum of jitter components at 11,025 Hz, -1 dBFS: -133 dB Maximum output: 2.15VRMS USB controller: XMOS XU208-128-TQ64 Inputs: USB micro Output: RCA Power: USB Class 1 (no drivers required for Windows, Mac, or Linux) Amp Section Input: RCA, SDAC (when powered) Output: 6.35 mm Power: AC adapter included(purchase separately: plug adapter for your countrys outlet) Gain: 1.0x and 3.3x Frequency response: +/-0.1 dB (20 Hz20 kHz) THD (1 kHz, 150 ohms): 0.0016% IMD CCIF (15 ohms): 0.001% IMD SMPTE: 0.002% Noise (ref 400 mV): -105 dB Max output (33 ohms): 613 mW Max output (150 ohms): 355 mW Max output (600 ohms): 88 mW Output impedance: 0.54 ohms Crosstalk (15 ohms): -65 dB Channel balance (50% volume): 0.6 dB Physical Front in (6.35 mm)output Rear RCA input/output Rear microUSB Rear power Chassis material: Anodized aluminum Case dimensions: 4.12 x 3.87 x 1.12 in (10.46 x 9.82 x 2.85 cm) Weight: 9.28 oz (263 g)

SPECS DAC Section Massdrop x Grace Design DAC chip: AKM AK4452 Audio formats: Up to 24 bit/96 kHz Frequency response, 20Hz–20 kHz: +/-0.02 dB THD+N at 20 Hz -0.15 dBFS: 0.0013% THD+N at 100 Hz, -0.15 dBFS: 0.0013% THD+N at 10 kHz, -0.15 dBFS: 0.0024% IMD CCIF, -6.03 dBFS, 19/20kHz, 24/96k: 0.0005% IMD SMPTE -6 dBFS, 24/96k: 0.0015% Noise, A-weighted: -105 dBu Dynamic range, A-weighted: >114 dB Linearity, -90 dBFS: -0.07 dB Crosstalk at 1 kHz, -10 dBFS (3.5mm jack): -102 dB Sum of jitter components at 11,025 Hz, -1 dBFS: -133 dB Maximum output: 2.15VRMS USB controller: XMOS XU208-128-TQ64 Inputs: USB micro Output: RCA Power: USB Class 1 (no drivers required for Windows, Mac, or Linux) Amp Section Input: RCA, SDAC (when powered) Output: 6.35 mm Power: AC adapter included (purchase separately: plug adapter for your country’s outlet) Gain: 1.0x and 3.3x Frequency response: +/-0.1 dB (20 Hz–20 kHz) THD (1 kHz, 150 ohms): 0.0016% IMD CCIF (15 ohms): 0.001% IMD SMPTE: 0.002% Noise (ref 400 mV): -105 dB Max output (33 ohms): 613 mW Max output (150 ohms): 355 mW Max output (600 ohms): 88 mW Output impedance: 0.54 ohms Crosstalk (15 ohms): -65 dB Channel balance (50% volume): 0.6 dB Physical Front ¼ in (6.35 mm) output Rear RCA input/output Rear microUSB Rear power Chassis material: Anodized aluminum Case dimensions: 4.12 x 3.87 x 1.12 in (10.46 x 9.82 x 2.85 cm) Weight: 9.28 oz (263 g)

Grace X Design Massdrop SDAC DAC Digital Audio Converter USB RCA. Excellent Condition. Barely used. Includes USB cord. Comes with original boxes.

SPECS DAC Section Massdrop x Grace Design DAC chip: AKM AK4452 Audio formats: Up to 24 bit/96 kHz Frequency response, 20Hz–20 kHz: +/-0.02 dB THD+N at 20 Hz -0.15 dBFS: 0.0013% THD+N at 100 Hz, -0.15 dBFS: 0.0013% THD+N at 10 kHz, -0.15 dBFS: 0.0024% IMD CCIF, -6.03 dBFS, 19/20kHz, 24/96k: 0.0005% IMD SMPTE -6 dBFS, 24/96k: 0.0015% Noise, A-weighted: -105 dBu Dynamic range, A-weighted: >114 dB Linearity, -90 dBFS: -0.07 dB Crosstalk at 1 kHz, -10 dBFS (3.5mm jack): -102 dB Sum of jitter components at 11,025 Hz, -1 dBFS: -133 dB Maximum output: 2.15VRMS USB controller: XMOS XU208-128-TQ64 Inputs: USB micro Output: RCA Power: USB Class 1 (no drivers required for Windows, Mac, or Linux) Amp Section Input: RCA, SDAC (when powered) Output: 6.35 mm Power: AC adapter included (purchase separately: plug adapter for your country’s outlet) Gain: 1.0x and 3.3x Frequency response: +/-0.1 dB (20 Hz–20 kHz) THD (1 kHz, 150 ohms): 0.0016% IMD CCIF (15 ohms): 0.001% IMD SMPTE: 0.002% Noise (ref 400 mV): -105 dB Max output (33 ohms): 613 mW Max output (150 ohms): 355 mW Max output (600 ohms): 88 mW Output impedance: 0.54 ohms Crosstalk (15 ohms): -65 dB Channel balance (50% volume): 0.6 dB Physical Front ¼ in (6.35 mm) output Rear RCA input/output Rear microUSB Rear power Chassis material: Anodized aluminum Case dimensions: 4.12 x 3.87 x 1.12 in (10.46 x 9.82 x 2.85 cm) Weight: 9.28 oz (263 g)

SPECS DAC Section Massdrop xGrace Design DAC chip: AKM AK4452 Audio formats: Up to 24 bit/96 kHz Frequency response, 20Hz20 kHz: +/-0.02 dB THD+N at 20 Hz -0.15 dBFS: 0.0013% THD+N at 100 Hz, -0.15 dBFS: 0.0013% THD+N at 10 kHz, -0.15 dBFS: 0.0024% IMD CCIF, -6.03 dBFS, 19/20kHz, 24/96k: 0.0005% IMD SMPTE -6 dBFS, 24/96k: 0.0015% Noise, A-weighted: -105 dBu Dynamic range, A-weighted: >114 dB Linearity, -90 dBFS: -0.07 dB Crosstalk at 1 kHz, -10 dBFS (3.5mm jack): -102 dB Sum of jitter components at 11,025 Hz, -1 dBFS: -133 dB Maximum output: 2.15VRMS USB controller: XMOS XU208-128-TQ64 Inputs: USB micro Output: RCA Power: USB Class 1 (no drivers required for Windows, Mac, or Linux) Amp Section Input: RCA, SDAC (when powered) Output: 6.35 mm Power: AC adapter included(purchase separately: plug adapter for your countrys outlet) Gain: 1.0x and 3.3x Frequency response: +/-0.1 dB (20 Hz20 kHz) THD (1 kHz, 150 ohms): 0.0016% IMD CCIF (15 ohms): 0.001% IMD SMPTE: 0.002% Noise (ref 400 mV): -105 dB Max output (33 ohms): 613 mW Max output (150 ohms): 355 mW Max output (600 ohms): 88 mW Output impedance: 0.54 ohms Crosstalk (15 ohms): -65 dB Channel balance (50% volume): 0.6 dB Physical Front in (6.35 mm)output Rear RCA input/output Rear microUSB Rear power Chassis material: Anodized aluminum Case dimensions: 4.12 x 3.87 x 1.12 in (10.46 x 9.82 x 2.85 cm) Weight: 9.28 oz (263 g)

Description: This product is unopened in the original box.This Grace Design m900 is a high-quality desktop DAC and headphone amplifier. It features a Burr-Brown DAC chip, a headphone amp with high output power and low output impedance, and a variety of input and output options. The m900 is perfect for audiophiles who want to get the most out of their music.This unit is in excellent condition and has been well-maintained. It comes with the original box, power cord, and remote control.Features:Burr-Brown DAC chipHeadphone amp with high output power and low output impedanceVariety of input and output optionsPerfect for audiophilesShipping:This unit will be shipped via USPS Priority Mail with tracking.Payment:Payment is accepted via PayPal.Please contact me if you have any questions.

A Portable Headphone Amp with Impeccable Sound Sweetwater is an Authorized Grace Design Dealer Genuine Open Box Item Sweetwaters 2-year warranty Grace Design m900 - Desktop DAC Headphone Amplifier 2-ch Headphone Amplifier with Stereo Unbalanced Analog Outputs, Digital Input via USB, TOSlink, and S/PDIF Coax, and Support for 44.1kHz-384kHz PCM and 64X-256X DSD Audio - Mac/PC A Portable Headphone Amp with Impeccable Sound Grace Designs m900 takes the stunning detail and flawless imaging of their flagship m920 headphone amplifier and packs it into a portable, bus-powered unit. But just because the m900 is portable, doesnt mean its lacking. Experience jitter-free computer audio playback, with support for up to 32-bit/384kHz PCM and 256x DSD. Dual zero-ohm output impedance headphone outputs deliver spacious and transparent performance, while stereo unbalanced analog outputs make connecting to your stereo monitor system easy. Either way, four different DAC filter settings provide personalized playback. At Sweetwater, we appreciate the m900s simple setup menu and easy-to-read 7-segment LED display, and its large rotary encoder makes volume control and menu navigation a breeze.Grace Design M900 Features: 2-ch headphone amplifier and top-shelf D/A converter Portable bus-powered unit is ideal for travel, desktop, or studio Jitter-free computer audio playback with support for up to 32-bit/384kHz PCM and 256x DSD Dual zero-ohm output impedance headphone outputs deliver spacious and transparent performance Stereo unbalanced analog outputs make connecting to your stereo monitor system easy Compatible with a wide variety of digital sources via USB, TOSlink, and S/PDIF coax 4 different DAC filter settings provide personalized playback Simple setup menu and easy-to-read 7-segment LED display Large rotary encoder for easy volume control and menu navigation SpecificationDetail Type Headphone Amp & DA Converter Input Channels Stereo Output Channels 2 Analog Outputs 2 x RCA (stereo) Headphones 2 x 1/4 TRS Digital Inputs 1 x Coax (S/PDIF), 1 x Optical Toslink USB 1 x Micro-B (high power), 1 x Micro-B (data, bus power) Form Factor Portable Power Supply USB bus powered Height 1.8 Width 4 Depth 5.25 RETURN INFORMATION We want you to be completely happy with your purchase from Sweetwater. If you are not satisfied with your product, you may return it for a refund of the purchase price within 30 days. If your purchase was eligible for Free Shipping, the shipping cost will be deducted from your credit or refund. Returns must be in the complete and original packaging with all accessories and complete documentation (Owners Manual, warranty card, quick start guides, etc.), show no signs of wear or use, and include a Return Authorization number or be subject to a restocking fee. Fast, FREE Shipping! Nearly every order received by 3PM Eastern ships the SAME DAY! FREE shipping to lower 48 states. Our central location reaches most states in 1-4 business days 99.95% warehouse accuracy We are proud to provide some of the fastest turnaround times on eBay. We use FedEx or UPS for most items, and USPS for smaller items. Residents of Hawaii, Alaska, and Puerto Rico should contact us for a shipping quote. PLEASE NOTE: We cannot ship large items to PO boxes, please provide an alternate address. If you have questions, feel free to contact us. Buy with confidence! Sweetwaters been selling on eBay since 2001, with 99.9% positive feedback! More than 30 years in business World-class customer service Fast, FREE shipping Free 2-year warranty on nearly every product Free tech support from audio experts