5 days ago
Where are your products made and who benefits from my purchase?

Some of our customers want to know where our products are made and who benefits from their purchase. NuPrime electronics are made in Taiwan with parts sources from suppliers worldwide, with roughly 30% percent from the US companies. 60% of gross profits pay US dealers, support and sales staffs. 10% of gross profits go to Taiwanese factory workers and expenses. The remaining 30% go to engineering, marketing and management staff.

1 week ago
How can DAC-10/10H line out be turned off ?

DAC-10 / 10H line out can be turned off by holding the Mute button for 3 seconds. The line out will not automatically turn off when the headphone is inserted because there are multiple headphone outputs.

1 week ago
What kind of trigger cable can be used for your products?

When a device has a 12V trigger input, it is designed to be turned on when a 12V is detected. You can use any standard male to male 3.5mm (3-pin type) cable.

2 months ago
How to use NuPrime DAC with Synology NAS ?

Connect Synology USB output to DAC's USB input.

Then follow this application note:  https://www.synology.com/en-global/knowledgebase/DSM/help/AudioStation/playmusic

"Enable high quality output for USB speakers" should be selected in the Audio Station's Advanced Setting.

3 months ago
Can you recommend a good RCA adapter?

This RCA male to two RCA female adapter can be used by one source channel to drive two amp channels.

https://www.amazon.com/MyCableMart-Female-Piggy-Back-Splitter-PREMIUM/dp/B0147LDZ72/

3 months ago
How to play DSD on NuPrime device ?

We recommend JRiver Media Center for its ease of use and setup. Please refer to this setup guide: /images/guides/JRiver-Configuration-for-DSD-Playback.pdf

For Foobar please refer to this general purpose USB audio playback guide: /images/guides/NuPrime-USB-Playback-Guide.pdf

3 months ago
Can the amplifier's speaker terminals be used as source inputs (e.g. to REL Subwoofer) ?

In some applications, the speaker outputs from the power amplifier are used as source signals for devices such as REL sub woofer. For such application, usually the receiving devices should have DC offset blocking capability because some amplifier by design has floating ground (DC offset) on the speaker outputs. 

The following models have no DC offset on the amplifier speaker outputs and the negative terminal is also the ground:

NuPrime STA-9, MCH-K38, IDA-16

The following models' speaker outputs can not be connected directly to sub woofer input:

NuPrime Reference 20, ST-10, IDA-8

4 months ago
What is the XLR pin definition of your DAC?

Our DACs follow the standard XLR pinout.

Pin 1 = Ground; Pin 2 = HOT (+); Pin 3 = COLD (-)

4 months ago
What are ASIO and WASAPI ?

WASAPI - Applications communicate with the audio driver through Sessions, and these Sessions are programmed through the Windows Audio Session API (WASAPI). In general, WASAPI operates in two modes. In exclusive mode (also called DMA mode), unmixed audio streams are rendered directly to the audio adapter and no other application's audio will play and signal processing has no effect. Exclusive mode is useful for applications that demand the least amount of intermediate processing of the audio data or those that want to output compressed audio data such as Dolby Digital, DTS or WMA Pro over S/PDIF. WASAPI exclusive mode is similar to kernel streaming in function, but no kernel mode programming is required. In shared mode, audio streams are rendered by the application and optionally applied per-stream audio effects known as Local Effects (LFX) (such as per-session volume control). Then the streams are mixed by the global audio engine, where a set of global audio effects (GFX) may be applied. Finally, they're rendered on the audio device.

Audio Stream Input/Output (ASIO) is a computer sound card driver protocol for digital audio specified by Steinberg, providing a low-latency and high fidelity interface between a software application and a computer's sound card. Whereas Microsoft's DirectSound is commonly used as an intermediary signal path for non-professional users, ASIO allows musicians and sound engineers to access external hardware directly.

4 months ago
Encore mDSD playing DSD file on latest OSX has noise

Please go to MIDI setting on MAC and make sure it is set to 24 bit.

4 months ago
What are the performance issues related to USB Audio and USB streaming mode?

A good source of information can be found here:

http://allen-heath.helpserve.com/Knowledgebase/Article/View/1002/201/qu-windows-driver-understanding-and-troubleshooting

We recommend that customer set the USB streaming mode to "Safe"

5 months ago
How to turn on device that has no power on trigger?

Use energy saving power strip such as "Tripp Lite 8 Outlet Eco-Surge Protector Power Strip" where turning on the master device will turn on all the source devices. Tripp Lite power strip also comes with good noise filter.  Another type of power strip such as "Belkin 8-Outlet Conserve Switch Surge Protector with 4-Foot Cord and Remote" is also highly rated by consumers.

 

5 months ago
How does NuPrime determine the "Displayed Sampling Rate"?

There are two ways to determine the sampling rate:

  1. Use meta data from the source music. If the meta data is wrong or the source does not contain any sampling rate data, then NuPrime device will not display the correct sampling rate.  Even if the display does not show the correct sampling rate, the decoding will not be affected. The actual sampling rate is detected during the decoding process. Products using this method are: IDA-16, DAC-10 and uDSD
  2. Use SRC (sampling rate converter implemented in FPGA) to detect the clock of the source music to determine sampling rate. Products using this method are: IDA-8, IDA-6 and DAC-9.

The sampling rate is displayed during the following conditions:

  1. When an input is first selected, the Input Number and Sample Rate are displayed. Unless there is a change in input or sampling rate, the initial sampling rate will not be displayed again. 
  2. The sampling rate is displayed whenever there is a change in Input Source or music sampling rate.

5 months ago
My Windows PC is not showing the NuPrime DAC

1. Check the Sound setting in the Control Panel. Verify that the NuPrime DAC is selected. If it is not showing, the device driver was not installed correctly.

2. Go to Device Manager to check the USB audio device driver is installed and without any conflict. Remove conflicting USB audio devices. There are several places to check:

a) The NuPrime USB audio device listed under Device Manager.

b) In Device Manger, in "Sound, video and game controllers", there should be a NuPrime USB audio device. Check that there is no "error status". Right click to "Update Driver Software" if the status is "error".

3. Reboot computer.

4. Check that your USB cable is not defective. 

 

6 months ago
What kind of volume control and preamp do you use for your DAC?

In traditional pure-analog designs, a switch-resistor network for volume control works best but is very expensive due to the use of many high precision discrete resistors. Next is a high-quality volume pot. You rotate the pot to change resistance, which in turn attenuates volume. A volume pot is non-linear and has balance issues at low volume.

A DAC typically has a mix of analog and digital inputs. Some DACs convert the analog input into digital to utilize the DAC's internal digital volume control and inputs selection, avoiding the use of expensive analog preamp and volume control as described above. The performance degradation of the analog input that has to go through A2D, volume adjustment and then D2A depends on implementation, which is beyond the scope of this discussion. Digital inputs on the other hand should go through the high-end DAC's internal volume control for best performance. 

Therefore it make sense to best adjust the volume in the digital domain for digital signals, and use an analog preamp and volume control for analog inputs.

Our DAC-9 and DAC-10* have analog inputs without A-to-D conversion. We use a mixed analog and digital volume-control design. The digital volume control’s 0.5db steps are sent to the DAC for the best possible result. The DAC’s analog output and analog inputs from other sources then go through a switch-resistor network. The DAC's output is switched straight through with minimum resistance. For analog inputs, the switch resistor network provides the best possible result. 

In conclusion, we feel we’ve developed the best type of volume control and preamp for a modern DAC.

6 months ago
Optical input is not working or has intermittent problem

Some entry level consumer devices have optical outputs with high jitter and that can affect the locking of optical signal with some model of NuPrime DAC. If this is determined to be the problem, you can use an optical to analog converter such as "Musou Digital Optical Coax to Analog RCA Audio Converter Adapter" (available from Amazon.com) to convert the noisy optical signal to the DAC's analog RCA inputs.

9 months ago
MCH-K38 front panel buttons and LED lights

The buttons on the front panel are toggle on/off switch. 

Power button:  Red means Standby and Green means power on.  No Light means AC power switch off.

Channel 1 ~ 8, Red light means the source is set to XLR and Green means the source is set to RCA.  No Light means the channel is turn off.

The light in between 1 & 2, 3 & 4, 5 & 6, and 7 & 8 are Mono indicators.  Red light also means the source is set to XLR and Green means the source is set to RCA.  No Light means the channel is turn off.  The mono channel can be toggled on/off with channel 2, 4, 6, & 8. 

Please make sure to press the buttons to turn on the channels.  Since our stereo lights are very small LED on the button top, so it might be easy to miss if its put inside the rack.

9 months ago
What is the performance difference between DAC-10 and HD-AVP?

HD-AVP includes the same high performance USB DAC implementation as DAC-10, but DAC-10 consist of a better preamp design using switch resistor technique. DAC-10 also includes other digital inputs that go through the same DAC.

In the HD-AVP, only the USB input goes through the stereo DAC for pure 2-channel audio and the other digital inputs are decoded by the multi-channel DAC within the AV processor circuit. In summary, the HD-AVP has a USB DAC that is close to the DAC-10 performance, but offer many additional media server and AV processing features.

Overall, HD-AVP offers tremendous value by combining high quality AVP and 2-channel stereo in a single chassis.

10 months ago
How does NuPrime achieve its price-performance advantage over competitors?

Product Pricing

Let’s have a look at pricing. We don't price a unit based on how good it sounds within our own product line or compared with the competition. We are an engineering company plain and simple. We don’t price our amps based on weight or workmanship. We price our products based on cost. Over time costs come down due to innovations and performance advances. For example, you may know that preamp switch resistors are quite expensive. We have learned how to implement them at a much lower cost by using FPGA, a big logic chip. Designs that were once exclusive to super-expensive preamps now occupy of our modestly priced amps and DACs. We’ve advanced from a bank of expensive resistors to a fruitful chip. In terms of cost difference the journey from one to the other amounts to an order of magnitude. Similarly, our amplifiers employ a naturally occurring self-oscillating design principle to generate the PWM pulses for Class D sampling rather than incorporating a relatively expensive PWM generator. In short, instead of marketing a crazy-expensive amp, we’re in a position to sell an STA-9 at $649.

Vertically Integrated

Typically a brand works with an OEM factory, including supplier factories, to achieve its target products. It isn't often that a brand owns its own factory. Atypically, NuPrime is vertically integrated: we don't subcontract for amplifiers and power supplies. Our in-house engineering team makes it unnecessary to spend elsewhere for what we do so well. Our stocked parts range from raw materials and ICs to semi-assembled boards. Hybrid Class-D switching and linear power supplies, DACs, preamps, and anything else we require are conceived and achieved in-house. Admittedly, we can't do it all. On occasion we partner to develop a product another company does better. In short, NuPrime customers benefit from our R&D, efficiency and fruitful associations. 

10 months ago
How to reset WR-100?

Keep pressing the reset key at the back for 6 seconds or more, then release, and WR-100 will reboot within 10 seconds. Wait one minute for it to be operational again.

10 months ago
Is the Line-Out / Subwoofer Out full range?

All the Line Outs or Subwoofer Outputs from all the DACs and Integrated Amps are full range.

The subwoofer outputs from home theater products are filtered according to the device setting.

11 months ago
If I am using your DAC with a preamp or integrated amp, how do I set DAC’s preamp volume?

It depends on how good the volume control on your preamp or integrated amp is. Basically you want to set the volume of the less accurate preamp as high as possible (90% of maximum for example) and use the better preamp to make the fine adjustment. If both are equally good, set both to around 0db (mid-point). It is easier to test your preamp at low volume. Set DAC-9 to near maximum volume and try it out with your integrated amp. Does the music sound well detailed at very low volume? Do the opposite and compare again.

11 months ago
What is the difference between Pure Direct, Pure Audio, and USB Audio?

Pure Direct and Pure Audio modes are part of the multi-channel mode and utilize the high quality multi-channel DAC. USB Audio goes through a separate high performance stereo DAC board. 

Pure Audio is a 2-channel Stereo mode where multi-channel inputs from the source are converted to 2 channel audio. Pure Direct is a pass-through (from the source device such as BluRay player) mode without any EQ effect. 

Don't confuse Pure Audio or Pure Direct with USB Audio input. If you have a computer connected to HD-AVP through USB Audio, by selecting the USB Audio as input source you will be utilising the high-end stereo DAC (this USB Audio DAC has the same performance as NuPrime DAC-10) instead of the multi-channel DAC for surround sound decoding.

The L&R outputs from 7.1 outputs come from USB DAC outputs or AVP outputs. The USB L&R outputs come only from the USB DAC.  That means if you are using USB Audio as the input, there are two sets of outputs: L&R outputs from 7.1 outputs and USB L&R outputs. This allow you to setup a separate high-end stereo system in another room. Therefore, if you select USB Input as the source, then the USB DAC outputs go to 7.1 L&R RCA and XLR and USB L&R outputs.

11 months ago
What are "bass management", "single/double post positioning device", and "comprehensive cross-over design" features ?

These are all marketing descriptions.

Bass management is the LFE in the audio setting (OSD setting > Setup > Speaker Setup > LFE Level)

"Increasing the performance of single/double post positioning devices" and "comprehensive cross-over design" means there are variety of settings you could configure the unit to suit your system, such as speaker range/position, speaker size, speaker level, etc.

 

11 months ago
Is the SUB output active in 2 channel stereo?

Sub output is available for all selections.