DO300 - Headphones S.M.S.L - Free user manual and instructions

Product Type	DAC/Headphone Amplifier
Model	DO300
Brand	S.M.S.L
Dimensions (WxHxD)	240 x 43 x 185 mm
Weight	1.2 kg (2.64 lb)
Power Consumption	<10 W (operating), <0.5 W (standby)
Power Supply	AC 100-240 V, 50/60 Hz
DAC Chip	ES9039MSPRO (ESS)
XMOS Processor	XU-316 (3rd Generation)
MQA Decoding	Full MQA and MQA-CD (USB, Optical, Coaxial, AES)
Bluetooth Version	5.0
Bluetooth Codecs	LDAC (up to 24bit/96kHz), aptX-HD, aptX, SBC, AAC
USB Sampling Rate	PCM up to 768 kHz/32bit, DSD up to DSD512 (22.5792 MHz)
Optical/Coaxial Sampling	PCM up to 192 kHz/24bit, DoP64
Total Harmonic Distortion + Noise	0.00005% (-125 dB)
Dynamic Range	134 dB (XLR), 128 dB (RCA)
Signal-to-Noise Ratio	134 dB (XLR), 127 dB (RCA)
Output Voltage	XLR 5.2 Vrms, RCA 2.5 Vrms
Display	IPS Color Display with Tempered Glass
Remote Control	Included, full-featured
Housing	All-aluminum alloy
Certifications	Hi-Res Audio (Japan Audio Association)

Frequently Asked Questions - DO300 S.M.S.L

What is the DO300 and what are its primary functions?

The S.M.S.L DO300 is a high-resolution USB DAC and headphone amplifier featuring the ES9039MSPRO DAC chip and XMOS XU-316 processor. It supports MQA decoding, Bluetooth 5.0 with LDAC, and multiple digital inputs.

How do I connect the DO300 to my computer?

Use the USB input with a USB cable (included). For Windows, you may need to install a driver from the S.M.S.L website. Mac OS X and Linux are driverless.

Does the DO300 support MQA?

Yes, it supports full MQA decoding via USB, Optical, Coaxial, and AES inputs. It also supports MQA-CD decoding.

How do I pair a Bluetooth device?

Press the Bluetooth input on the remote or knob. On your device, select 'S.M.S.L DO300'. If pairing fails, reset Bluetooth via the menu.

What are the sound color settings?

The DO300 has 9 sound color profiles: Rich1-3, Tube1-3, and Crystal1-3. They alter the sound character without changing frequency response.

How do I adjust the DPLL setting?

In the menu, go to DPLL and set a value from MIN to MAX (15 levels). Increase if you experience sound interruptions, decrease for better jitter performance.

What is the I2S pin configuration?

The DO300 supports both Normal and Reversed I2S pinouts. Check the pin assignment diagram in the manual and match your source.

How do I reset the DO300?

For Bluetooth issues, select 'RESET' from the main menu to clear Bluetooth pairing. For full factory reset, select 'RESET' during any non-Bluetooth input.

What batteries does the remote control use?

The remote uses 2 x R03/AAA batteries.

What is the warranty period?

The product comes with a 1-year warranty for normal use. Within 7 days of purchase, you can return or exchange if defective. Please keep your proof of purchase.

USER MANUAL DO300 S.M.S.L

Line drawing of a small electronic device with a circular knob and screen (no text or symbols)

安全注意事项

DoP DoP256(USB), DoP64(光纤/同轴)

蓝牙规格：

LDAC 24bit/96kHz (990kbps/660kbps/330kbps)

aptX-HD 24bit/48 kHz_576kbps

aptX ....16bit/44.1 kHz_352kbps

SBC 16bit/44.1 kHz_328kbps

AAC 16bit/44.1 kHz_320kbps

消耗功率 ....../<10W

待机功耗 ....../<0.5W

Line drawing of a small electronic device with a circular knob and screen (no text or symbols)

The contents of this manual may be changed with the edition, and are subject to change without notice. Ver 1.0

Safety Notes

• Install this unit in a well ventilated, cool, dry, clean place-away from direct sunlight, heat sources, vibration, dust, moisture, or cold..
- Use the voltage specified on this unit Only. Using this unit with a higher voltage than specified is dangerous and may cause fire, damage to this unit, or personal injury. Our company will not be held responsible for any damage resulting from the use of this unit with a voltage other than that specified.
- Do not attempt to modify or fix this unit by yourself. Contact alesperson or customer service when any service is needed. The cabinet should never be opened for any reason.
- When not planning to use this unit for long periods of time (i.e. when going on vacation), disconnect the power cable from the AC wall outlet.

Important note:

The product specifications and information mentioned in this manual are for reference only. The content of this manual is subject to change without notice.

Warranty Terms

1. The Term of Service Foshan Shuangmusanlin Technology Co., Ltd promises to offer good-quality products. If the product is broken in 7 days after purchasing when you use it normally, you can choose to send it back for return, replacement or repairing (only the product does not affect the second sales can be returned). Repairing for free in one year if you use it normally.

2. Date of purchase is in accordance with the date on invoice or receipt uesd by seller, and if you buy it on line, you can show the screenshot of trade.

3. If an inappropriate usage causes the unit damaged, the warranty will be void. As below.

4. All damages by inappropriate use, including using it under non-normal working environment or without following the instructions.
   • Dismantling, refitting, repairing by user in private.

5. Causing damage by using some fittings instead of the designative or accredited ones.
   • Cannot provide credible proof of purchase.

6. Sending it back to our company for repairing.

7. Contact your S.M.S.L Audio reseller for a return or replacement.

Features

• Support MQA decoding and MQA-CD;
- New 3rd generation XMOS XU-316, PCM support up to 32bit/768kHz, DSD support to DSD512;
- The new generation flagship DAC chip ES9039MSPRO of USA ESS has built-in MQA hard decoding;
- Designed with an eight-channel parallel circuit, the distortion is as low as a staggering 0.00005% (-125dB) and more stable.
• Using 11 high-end dual op amps and a large number of audiophile components;
- Adopt 2nd PLL to eliminate JITTER during SPDIF transmission;
- The new self-developed CK-03 clock processing circuit greatly reduces clock jitter;
- Support DOP independent display function, accurately determine the current decoding format;
• USB, optical fiber, coaxial, AES, I2S support DSD transmission, coaxial and optical fiber support DOP64;
• Use tempered glass to fully fit the color IPS display;
• Built-in low-noise power processing, while improving power efficiency, lower power consumption;
- Combined with multiple low-noise regulated power supplies, it provides a stable, reliable, efficient, and low-noise power supply system.
• Qualcomm high-end Bluetooth chip, support LDAC (24bit/96kHz), APTX/HD, SBC, AAC;
- High quality all-aluminum alloy shell, support high quality gold plated input and output connection terminals;
• Japan Audio Association (JAS) Hi-Res certification;
• Equipped with remote control and full-featured remote control.

Specifications

Input ...... USB / Optical / Coaxial / Bluetooth / I²S / AES

Output RCA/XLR

Line output amplitude....XLR 5.2Vrms

RCA 2.5Vrms

THD+N 0.00005%(-125dB)(UN-WTD)

Dynamic range 134dB(XLR),128dB(RCA)

SNR 134dB(XLR),127dB(RCA)

USB transmission....USB 2.0 Asynchronization

USB compatibility ....Windows 7 / 8 / 8.1 / 10(Needs Driver)

Mac OSX10.6 or Later、Linux(Driverless)

MQA decoder .... USB / Optical / Coaxial / AES

MQA-CD decoder ..... Optical / Coaxial / AES

Sampling rate & Bit Width:

USB PCM 44.1 \~ 768kHz(32bit)

DSD 2.8224 \~ 22.5792MHz(1bit)

Optical / Coaxial 44.1 \~ 192kHz(24bit)

DoP DoP256(USB), DoP64(Optical / Coaxial)

Bluetooth: 5.0

LDAC 24bit/96kHz (990kbps/660kbps/330kbps)

aptX-HD 24bit/48 kHz_576kbps

aptX 16bit/44.1 kHz_352kbps

SBC 16bit/44.1kHz_328kbps

AAC 16bit/44.1 kHz_320kbps

Power Consumption ....../<10W

Size 240x43x185mm (WxHxD)

Weight 1.2kg / 2.64lb

SMSL reserves the right to make improvements which may result in specification or feature changes without notice.

Remote control

• If the remote control is still ineffective when it is close to the machine, replace it with a new battery.
• If the user does not use the remote control for a long time, remove the battery of the remote control.
• Dispose of used batteries in accordance with local regulations on battery disposal.

Operating the remote control

Note

This remote controller use 2 x R03/AAA batteries.

Display Interface and Instructions

1 Knob Remote window Disp2y
4 RCA output
7 Balanced output
0 Coaxial input USB input
3 Power switch
11

5 Bluetooth antenna
8 AES/EBU input

3
6 Optical input
9 I²S input
12 AC IN(100-240VAC)

Package list

1* SMSL DO300
1* USB cable
1* Warranty card

1* Remote control
1* AC power cable

1* Bluetooth antenna
1* User manual

Instructions

INPUTS

USB
- BLUETOOTH
• OPTICAL
COAXIAL
AES/EBU
I2S(HDMI)

OUTPUTS

• ALL LINE OUT
  BALANCED
  UNBALANCED

PCM FILTER

FILTER OFF
MINIMUM PHASE
APODIZING
• LINEAR FAST
• LINEAR SLOW
MINIMUM FAST
• MINIMUM SLOW
- LOW DISPERSION

Instructions

DSD FILTER

There are 4 kinds of digital filtering in total. It's the way that the digital operation means the clutter outside the audioFilter out, respectively

• 47kHz Cutoff
- 50kHz Cutoff
- 60kHz Cutoff
- 70kHz Cutoff

SOUND COLOR

There are 9 sound color settings in DO300.

• Rich1, Rich2, Rich3
• Tube1, Tube2, Tube3
  • Crystal1, Crystal2, Crystal3

This setting is using the DSP of DAC, to make some different sound color, all of these settings will not change the frequency response curve. When set to "Standard", this setting will be bypassed.

PRE MODE

PRE MODE is the volume adjustment function switch for the output interface.

• VARIABLE: The output interface volume is controlled.
• FIXED: The output interface volume is fixed.

Instructions

DPLL

• MIN \~ MAX

(A total of 15 kinds, the default is 7 kinds. The larger the number is, the stronger the range to adapt to jitter, and the smaller the number, the better the performance against clock jitter.)

This DPLL setting is a special function of ESS series products. It can adjust the internal DPLL digital phase locked loop circuit Bandwidth, so that the chip achieves a balance between anti clock jitter and input tolerance.

Its function:

• When the clock stability of the input signal is good, this value can be reduced, so that the clock performance of the system is better;
• When the clock stability of the input signal is not good, the sound may be interrupted. Increase this value can avoid the sound interruption! Especially when using TV as signal source!

FN KEY FOR

• OUTPUTS
- BLUETOOTH
PHASE

PS MODE

NORMAL
- REVERSED

NORMAL

REVERSED

Note: This option is used to match different I²S interface standards, please check the interface definition of the signal source before use

Instructions

AUDIO PHASE

• NORMAL (2+,3-)
• INVERTED (2-,3+)

NORMALINVERTED

[NO TEXT]

DIMMER

• 5 second \~ 60 second

(The range is 5 seconds-60 seconds. After setting, the screen will automatically go off within this time, and the screen will re-light up if you operate the remote control or the knob at any time.)

BRIGHTNESS

• During Bluetooth input, please select "RESET" from the main menu of DO300 and confirm. The system will only reset the Bluetooth pairing status;
• During other input (Not Bluetooth), please select "RESET" from the main menu of DO300 and confirm, the system will clear all settings, including Bluetooth.

□□300

取扱説明書

Line drawing of a small electronic device with a circular knob and screen (no text or symbols)

DoP DoP256(USB), DoP64(光/同軸)

Bluetoothの仕様:

LDAC 24bit/96kHz (990kbps/660kbps/330kbps)

aptX-HD 24bit/48 kHz_576kbps

aptX 16bit/44.1 kHz_352kbps

SBC 16bit/44.1 kHz_328kbps

AAC ....16bit/44.1 kHz_320kbps

消費電力 ....../<10W

NORMAL

REVERSED