UNiKA CT7601SR PRO Usb Pro Series Audio Interface USB Audio Direct Box User Manual

UNiKA CT7601SR PRO USB Pro Series Audio Interface USB Audio Direct Box

Product Information

• The UNiKA PRO USB is a professional series audio interface and USB audio direct box designed and made in Taiwan.
• It is a passive DI box specially designed for mobile devices and is compatible with Windows, Mac OSX, iOS, and Android systems.
• The interface does not require any drivers for plug-and-play functionality.
• It can be used as a signal impedance matcher for mobile devices, as well as a built-in headphone amplifier and volume control.
• The PRO USB features a USB audio decoder that combines Come True CT-7601SR and Cirrus Logic CS-43131 to achieve 192KHz/32bit performance.
• It is compatible with DSD digital formats and all common lossless and compressed music formats.
• The interface also has a built-in mini TRS headphone monitor output and monitor volume control, capable of driving headphones with an impedance range of 16~600 ohms.

Product Usage Instructions

General Precaution Before Use

• Before using the UNiKA PRO USB, please read the user manual carefully and pay attention to every detail. If you are connecting the interface to a mixer, make sure to turn off the mixer power and +48V phantom power before connecting the cables.
• Only turn on the power and phantom power after inserting the signal cables. For passive models, do not turn on the phantom power to avoid equipment damage or leakage.
• If your model has a volume knob, turn it to the minimum position before use. During operation, avoid plugging or unplugging wires arbitrarily to prevent signal loss.
• Please refer to the user manual for proper soldering methods of plugs to ensure expected signal levels and smooth transmission.
• If you require further installation or operation guidance, please contact UNiKA’s dealer or distributor directly or send an email to info@unikapro.com for assistance.

Connect to Computer

• To connect the UNiKA PRO USB to a computer, simply use the provided USB cable to connect the TYPE-C terminal of the interface to an available USB port on your computer.
• The interface is compatible with Windows and Mac OSX systems and does not require any additional drivers for plug-and-play functionality.

Connect to Mobile Phone

• To connect the UNiKA PRO USB to a mobile phone, use the provided USB cable to connect the TYPE-C terminal of the interface to the corresponding port on your mobile phone.
• The PRO USB is the first to use TYPE-C as the terminal for connecting to mobile phones. It is compatible with iOS and Android systems and does not require any additional drivers for plug-and-play functionality.

GENERAL PRECAUTION BEFORE USE

• Thank you for purchasing the UNiKA PRO SERIES AUDIO INTERFACE. Before using, please read this manual carefully and pay attention to every detail that you must pay attention to. If you use a mixer to connect to this interface, please turn off the mixer power and +48V phantom power before connecting, and then turn on the power and phantom power after inserting the signal cables. For passive models, please do not turn on the phantom power to avoid leakage or damage to the equipment.
• If using a model with a volume knob, turn the volume knob to the minimum. During use, please do not plug or unplug the wires arbitrarily to avoid signal loss. Please refer to the following instructions for the soldering method of the plugs to ensure the expected level and keep the signal smooth.
• If you need further installation or operation guidance, please directly contact UNiKA’s dealer or distributor, or write to the following mail address for help: info@unikapro.com

PRODUCT OVERVIEW

• PRO USB is a passive DI box specially designed for mobile devices. It is compatible with Windows, Mac OSX, iOS, and Android systems.
• It does not require any drivers to achieve plug-and-play.
• It can be used as a signal impedance matcher for mobile devices and a built-in headphone amplifier and volume control.
• PRO USB is the first to use TYPE-C as the terminal to connect to mobile phones and computers.
• The USB audio decoder combines Com True CT-7601SR and Cirrus Logic CS-43131 to achieve 192KHz/32bit performance, and are compatible with DSD digital formats and all common lossless and compressed music formats.
• The PRO USB has a pair of built-in UNiKA-PROTM EI9AE3R3 1.25:1 isolation transformers for each channel isolation transformer.
• The transformer has a special copper foil layer and a dedicated grounding layer, which can ensure the high signal/noise ratio and dynamic sound of the device, and avoid unnecessary.
• Leakage caused by radio frequency interference, grounding interference, and potential difference. PRO USB is especially suitable for mobile phones, computers, and media players.
• It converts high-impedance signals into low-impedance balanced signals, which is convenient for extending the wiring distance and blocking interference.
• PRO USB has built-in mini TRS headphone monitor output and monitor volume control, which can drive 16Ω~600Ω headphones.

CAUTION

• This product has undergone rigorous inspection before leaving the factory. If customers encounter failures during use, please contact your local dealer or distributor for replacement or repairing, do not disassemble the case or replace parts by yourself, which will invalidate the warranty.
• For details, please refer to the warranty regulations in the enclosed warranty card, and fill in the details, and get a valid stamp or signature of the d ealer or distributor.

PARAMETER TEST CONDITIONS

• In the development and manufacturing process, Audio Precision’s 2700 series and 500 series are used to test and verify electrical characteristics.

FEATURES

• Built-in UNiKA-PROTM EI9AE3R3 1.25:1 isolation transformer for each channel
• Built-in CT7601 USB bridge and CS43131 DAC with headphone amplifier
• 32bit convert rate and 192KHz over sampling
• Compatible with Windows, Mac OS, iOS and Android systems.
• Compatible with DSD digital formats and all common lossless and compressed music formats.
• Mini TRS jack used to connect earphones or headphones with volume control
• Built-in Type-C USB digital audio input connector
• The output is equipped with a GND/LIFT switch

CONNECT TO COMPUTER

• If you need to use the ASIO driver to play DSD stream files in WINDOWS 10, or connect PRO USB it the WINDOWS 7 system, please download the driver from the official website: https://www.unikapro.com/support/download/
• File name: UNiKA ASIO_DSD_driver_ENG_20201208
• MacOSX not need to install an ASIO driver to either play normal music format or DSD.
• When PRO USB is successfully connected to the computer, UNiKA USB DEVICE will be displayed in the sound card option, because the computer has automatically defaulted PRO USB as its external sound card.
• If it is not automatically recognized, you can open the settings to change it.
• If the connection is successful, the “SOURCE ACTIVE blue light on the top cover of the PRO USB will also light up”, indicating that it has been powered by the computer.

CONNECT TO MOBILE PHONE

• For Android OS, Use the TYPE-C to TYPE-C or Micro USB to TYPE-C data cable to connect the phone and PRO USB, then you can connect and play. After the connection is successful, the blue “SOURCE ACTIVE” light on the cover will also light up .
• For iOS, Limited by Apple’s special transmission encryption method, some models may not be able to directly connect to PRO USB via TYPE-C USB for playback. It is recommended to purchase Apple’s original lightning or TYPE-C OTG dongle for connection.

APPEARANCE PARTS & FUNCTIONS

1. Left channel signal output: XLR terminal, isolated transformer’s balanced output, no need to use +48V phantom power.
2. Output grounding/floating switch: when the switch is not pressed, the first pin (PIN-1) of XLR is grounded. PIN-1 will be disconnected from the ground after pressing. This button should depend on the system. Used in the situation, in order to isolate the ground loop noise or leakage.
3. Right channel signal output: XLR terminal, isolated transformer’s balanced output, no need to use +48V phantom power.
4. Input signal indicator: When the USB signal source is inserted, this LED display will light up, indicating that the signal and power supply are normal.
5. TYPE-C USB playback input: used to connect Android phones, Apple phones. In addition to being compatible with the above operating systems, it can also play various lossless and compressed music and DSD.
6. Headphone monitor output: You can connect 16Ω~600Ω headphones for pre-cue or real-time monitoring with level control.
7. Headphone monitor volume control: You can adjust the volume of the monitor headphone without affecting the level of the balanced output.

CT7601SR USB/DSD AUDIO BRIDGE OVERVIEW

• CT-7601SR is a single-chip audio USB 2.0/1.1 playback and record bridge.
• It is compatible with Windows, Mac OS, iOS, and Android, and plug and play no need extra driver.

AUDIO DECODING CAPACITY

• PCM (Stereo) supports up to 192KHz/32bit through USB port.
• DSD (Native) supports 2x bandwidth through a USB port.

CS43131 DIGITAL AUDIO CONVERTER & HA OVERVIEW

• The CS43131 combines a next-generation, low-power audio DAC with a high-fidelity headphone amplifier to provide a superior system-level audio performance without draining battery life.
• This IC minimizes board space requirements while enabling performance and features to drive design differentiation. The CS43131 can support excellent audio quality with a wide range of headphones.
• This IC can drive 2 VRMS of output into 600 Ω high-impedance headphones with inter-channel isolation of 110dB, and 30mW into 32 Ω low-impedance headphones.
• To minimize pre-echo and ringing artifacts, the CS43131 is designed with proprietary digital interpolation filters that support five selectable digital filter responses. Filtering options include low group delay with a pseudo-linear phase and a fast or slow roll-off. Volume matching of the analog output levels and channel mixing enable a seamless transition between the DSD and PCM playback paths. The onboard low-noise, ground-centered headphone amplifier provides proprietary AC impedance detection to support headphone fingerprinting to provide a consistent and transparent audio experience for the end user regardless of transducer impedances or frequency responses.
• The amplifier also supports adaptive post-processing for customer-bundled and third-party headphones/headsets. An integrated auxiliary audio input and click-less” switch is provided for non-high-fidelity use cases.

FEATURES

• Enhanced ΔΣ oversampling DAC architecture – 32-bit resolution – Up to 384-kHz sampling rate – Low clock jitter sensitivity – Auto mute detection
• Integrated high-performance, ground-centered stereo headphone outputs
• 130dB dynamic range (A-weighted)
• -115dB total harmonic distortion + noise (THD+N)
• 110dB inter-channel isolation
• Up to 2-Vrms stereo output
• Headphone power output, 30mW per channel into 32Ω/ 5mW per channel into 600Ω
• Headphone detection, Headphone DC and AC impedance measurement
• Headphone plug-in detection
• Pop-guard® technology eliminates pop noise
• Mono Mode (differential) support
• Wideband Flatness Mode Support
• Direct Stream Digital (DSD®) path – Up to 256
• Alternate headphone input
• Smartphones, tablets, portable media players, laptops compatible

TYPE-C PLAYBACK

• PRO USB is equipped with the most mainstream TYPE-C USB (2.0) terminal to connect to a variety of mobile devices and computers and is accompanied by a music beat indicator on the left side of the TYPE-C socket.
• There are many TYPE-C conversion terminals on the market, and it is recommended to use qualified products to avoid transmission failures.

MONITOR

• Equipped with a mini TRS headphone output jack and a monitoring volume knob at the bottom and right of TYPE-C, 16Ω~600Ω headphones can be inserted for advanced and real-time monitoring.
• The volume knob does not affect the level of the balanced output at the back of the isolation transformer.

TYPE-C SIGNAL SOURCE ACTIVE INDICATOR

• When connected to a computer or mobile device, the computer and mobile device will provide PRO USB power, and the blue light “SOURCE ACTIVE“ on the top cover will also light up at this moment.
• Please note that the light on does not mean that the audio signal has been connected.
• Please refer to the instructions on the previous pages to confirm whether your music is correctly transferred to the PRO USB via your computer or mobile device.

ELIMINATING GROUND LOOP NOISE

• The built-in channel-independent balanced isolation transformer has solved the potential difference leakage problem. When the system causes a ground loop due to poor wiring, the noise can be eliminated through the GND/ LIFT button.
• The GND/LIFT button determines whether pin 1 of the output XLR is grounded, grounded when it bounces, and disconnected from the ground when pressed.

SYSTEM CONNECTION GUIDE

XLR-Female connector

XLR-Male output jack

TYPE-C Connect to input music source

1. Shield pin
2. Hot pin
3. Cold pin

SPECIFICATIONS

(Specifications are subject to change without notice.)

PRO USB

• Circuit principle Passive/Transformer balanced output
• USB Version & connector Ver 2.0 Type- C
• UAC bridge solution 32bit/192KHz
• DAC solution 32bit/192KHz with 2x DSD
• Power supply Powered by PC or mobile phone through Type-C playback connector with LED status indicator
• Music beat indicator LED
• Output connector 2 x Male XLR through ISO Transformer
• Output GND/LIFT switch Shared push button
• Max Output level 0.778Vrms
• Headphone power output 30mW per channel into 32Ω
  • 5mW per channel into 600Ω
• Frequency response 20Hz-20KHz, ±0.5dB
• S/N ratio @20Hz~20KHz un-weight >110dB
• T.H.D. @1KHz 0dBV output <0.005%
• Transformer Ratio 1.25:1
• Chassis 1.6mm/1.2mm steel cabinet and chassis
• Surface finished Durable complex painting
• Dimension (W x D x H) 78 x 124 x 46 mm
• Weight 0.64kg
• Shipping weight 0.67kg
• Packing per carton 20pc/14.00kg
• Shipping dimensions per carton 305 X 283 X 195 mm
• www.unikapro.com
• 6F, No.168, Xin-Hu 2nd Rd.
• Nei-Hu District, Taipei City. 11494.
• Taiwan, R.O.C.
• +886 2 27933017
• +886 2 27928264
• info@unikapro.com

Documents / Resources

| UNiKA CT7601SR PRO Usb Pro Series Audio Interface USB Audio Direct Box [pdf] User Manual
CT7601SR, CS43131, CT7601SR PRO Usb Pro Series Audio Interface USB Audio Direct Box, Usb Pro Series Audio Interface USB Audio Direct Box, Interface USB Audio Direct Box, Audio Direct Box, Direct Box
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References

• DOWNLOAD - Unika Proaudio

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