FAQ Weiss

The output voltage of our D/A Converters can be set in a few steps in the analog domain. This allows to set the output voltage such that the subsequent amplifier is properly driven.

This can be judged with the volume control potentiometer: The volume control should work in a decent range around the middle of the control range. For example, it should not be set to the start or the end of the control range to get proper loudness. So, choose the output voltage step, which allows for a “proper” volume control.

One must know that if the D/A Converter output level is too high, the amplifier input can be overloaded. The volume control in an amplifier is usually not located right at its input but somewhere in the signal path. So, the input amplifier can be overloaded even when the volume control is put down.

In the manual, find this quote about the power supply.

• DC input voltage: 6-9 Volt DC
• input current: 1050mA at 6V, 700mA at 9V
• Power consumption: 6.3 Watt

Moreover, please check the specs the DC tip has to have:

• 5.5mm outer diameter
• 2.5mm inner diameter
• At least 12mm barrel length.

Cutting off some of the plastic is usually possible if the barrel is shorter. However, the diameters above have to be matched. The Center Pin is positive.

We offer two adapter cables to connect headphones directly to the unit:

• An RCA to stereo Jack type
• An XLR to 4 pin XLR type for 4-pin headphones.

You can use an XLR to RCA adapter. That should work even w/o a transformer.

The adapter should be like this:

• XLR pin 1 and 3 to RCA ground XLR pin 2 to RCA hot
• Or: XLR pin 1 and 2 to RCA ground XLR pin 3 to RCA hot

Standby mode can be challenging for the Unit. We suggest switching off the PC/Mac. The Unit reconnects properly after power-up.

You may unplug the USB connection while the units are powered.

Please contact us via the support page and tell us your unit’s serial number. We can then check if your unit is already equipped with the software that allows you to select the DPLL behavior by jumper placement.

If not, the unit must be sent to Weiss Engineering for the software update. Alternatively, you may open the unit (remove the top cover) and check whether there is a 6 pin pin-header with a jumper in one of the corners of the top board. If the jumper is there then your unit has the proper software installed.

The jumper positions are as follows:

o o o

o o=o

default position, i.e. not jitter tolerant

o o o

o=o o

jitter tolerant position

Use a USB cable that is as short as possible. Using “high-end HiFi” USB cables may cause issues. If you do so, try a standard USB cable from a computer store.

When playing on Windows, use the proper USB driver from our website. MacOS does not need a specific driver.