PROMIX400U2 - Mixer HQ Power - Free user manual and instructions

Product type	Mixing console
Brand	HQ Power
Model	PROMIX400U2
Dimensions	320 x 350 x 65 mm
Weight	5 kg
Power supply	100-240 VAC ~ 50/60 Hz
Power consumption	30 W
Inputs	2 RCA phono, 4 RCA line, 1 microphone (combo XLR/Jack), USB
Outputs	2 Master XLR, 2 Master RCA, 1 Rec RCA, 1 Booth RCA, 1 headphone
Frequency response	20 Hz - 20 kHz
Signal-to-noise ratio	86 dB (CD/LINE without effects)
Distortion (THD)	< 0.02% (CD/LINE/PHONO)
Crosstalk	> 70 dB
Channel EQ	3-band: HI (+12/-24 dB at 13 kHz), MID (+12/-24 dB at 1 kHz), LOW (+12/-24 dB at 70 Hz)
Microphone EQ	3-band: HI (+12/-12 dB at 10 kHz), MID (+12/-12 dB at 1 kHz), LOW (+12/-12 dB at 100 Hz)
Main features	4 channels, 45 mm TCT crossfader, multi-effects DSP processor, fader start, talk-over, cue split, LCD screen
Care and cleaning	Disconnect before cleaning; wipe with a damp lint-free cloth; avoid alcohol and solvents
Safety	Use indoors only; protect from humidity; do not block ventilation slots; disconnect when not in use
Spare parts and repairability	No user-serviceable parts; order parts from the dealer
General information	24-month warranty (EU); professional indoor use; do not modify the device

Frequently Asked Questions - PROMIX400U2 HQ Power

How to connect a turntable to the mixing console?

Connect the turntable to a PHONO input (channel 1 or 2) and set the source selector to PHONO. If humming occurs, connect the ground wire to the SIGNAL GND terminal.

Can I use a microphone simultaneously with other sources?

Yes, channel 4 can be set to MIC. Use the TALK OVER function to attenuate other channels and prioritize the microphone.

How do I listen to a channel in the headphones before mixing it?

Press the CUE button of the desired channel. Adjust the level with the headphone LEVEL knob and use MIXING to balance between the cue signal and the master.

What is the function of the crossfader and how to assign it?

The crossfader allows fading between two channels. Use the CROSS FADER ASSIGN A/B buttons to assign channels. The transition curve (sharp or smooth) is adjusted with the CURVE selector.

How to use the built-in DSP effects?

Turn the effects selector [17] to choose an effect (e.g., echo, reverb). Adjust parameters with settings [14] and enable/disable with the EFFECTS button [15].

What to do if no sound comes out of the speakers?

Check that the power is connected and the switch is on. Ensure cables are properly connected to Master outputs (XLR or RCA). Gradually raise the channel faders and Master volume.

How to clean the mixing console?

Disconnect the unit. Wipe with a damp lint-free cloth. Never use alcohol or solvents. Do not let liquid enter the interior.

Can I connect a USB device?

Yes, the USB port [24] is dedicated to channel 3. Set channel 3's source selector to USB and connect your device (MP3 player, USB key).

What does the 'cue split' function mean?

In MONO SPLIT mode, the cue signal is heard in the left headphone and the master signal in the right. Activate this function with the MONO SPLIT/STEREO selector [7].

How to adjust the EQ to avoid clipping?

Use the 3-band EQ (HI, MID, LOW) to adjust frequencies. Do not increase levels abruptly; gradually raise TRIM and faders. Monitor the peak meter to avoid red.

USER MANUAL PROMIX400U2 HQ Power

Exterior view of a black audio amplifier console with multiple knobs, dials, and a digital display (no readable text or symbols)

USER MANUAL 3

GEBRUIKERSHAND LEIDING 7

NOTICE D'EMPLOI 11

MANUAL DEL USUARIO 15

To all residents of the European Union

Important environmental information about this product

This symbol on the device or the package indicates that disposal of the device after its lifecycle could harm the environment. Do not dispose of the unit (or batteries) as unsorted municipal waste; it should be taken to a specialized company for recycling. This device should be returned to your distributor or to a local recycling service. Respect the local environmental rules.

If in doubt, contact your local waste disposal authorities.

Thank you for choosing HQPower™! Please read the manual thoroughly before bringing this device into service. If the device was damaged in transit, don't install or use it and contact your dealer.

2. Safety Instructions

Be very careful during the installation: touching live wires can cause life-threatening electroshocks.

Always disconnect mains power when device not in use or when servicing or maintenance activities are performed. Handle the power cord by the plug only.

Keep this device away from children and unauthorized users.

There are no user-serviceable parts inside the device. Refer to an authorized dealer for service and/or spare parts.

• Make sure that the available voltage does not exceed the voltage stated in the specifications of this manual.
- Do not crimp the power cord and protect it against damage. Have an authorised dealer replace it if necessary.

3. General Guidelines

Refer to the Velleman® Service and Quality Warranty on the last pages of this manual.

Indoor use only. Keep this device away from rain, moisture, splashing and dripping liquids. Never put objects filled with liquid on top of or close to the device.

Keep this device away from dust and extreme heat. Make sure the ventilation openings are clear at all times. For sufficient air circulation, leave at least 1" (± 2.5 cm) in front of the openings.

Protect this device from shocks and abuse. Avoid brute force when operating the device.

• Familiarise yourself with the functions of the device before actually using it. Do not allow operation by unqualified people. Any damage that may occur will most probably be due to unprofessional use of the device.
• All modifications of the device are forbidden for safety reasons. Damage caused by user modifications to the device is not covered by the warranty.
• Only use the device for its intended purpose. All other uses may lead to short circuits, burns, electroshocks, lamp explosion, crash, etc. Using the device in an unauthorised way will void the warranty.
• Damage caused by disregard of certain guidelines in this manual is not covered by the warranty and the dealer will not accept responsibility for any ensuing defects or problems.
  • A qualified technician should install and service this device.
• Do not switch the device on immediately after it has been exposed to changes in temperature. Protect the device against damage by leaving it switched off until it has reached room temperature.
• This device is designed for professional use on stage, in discos, theatres, etc. It should only be used indoors with an alternating current of 230 VAC/50 Hz.
• Use high-quality shielded cables with low capacitance throughout the system.
• Avoid using excessively long cables. Make sure all plugs and jacks are in perfect working order to avoid hum, noise and popsthat could damage speakers.

• Route one cable at the time. Pay attention to the labelled audio input and output jacks.

• Always begin with the master faders, volume controls and the amplifier volume at minimum position. Gradually turn up the volume after connection is completed.
  • Use the controls with restraint. Rapid movements may damage the speakers due to amplifier clipping.
  • Use the original packaging if the device is to be transported.

• Keep this manual for future reference.

4. Features

• outputs: 2 Master (XLR and RCA), 1 Rec (RCA) and booth monitor output (RCA)
- inputs: 2 Phono (RCA), 4 Line (RCA) and 1 MIC (Combi), USB
• with Digital Signal Processor (DSP) effects and fader start control
- trim: gain for each input channel
- peak level meter: allows the user to instantly determine the source input condition for each channel
- talk over: mutes -14dB all levels apart from the microphone MIC1
• cross fader curve: choose from two types of cross fader start-up options
- headphone monitor balance between cue and master out
• freely assignable long life TCT cross fader (45mm) with adjustable curve
- extra LED display per channel for pre-listening signal
• gain control with 3-fold sound control (+12/-26dB) per channel
• 3-fold sound control (+12/-26dB) for microphone
• CUE on and off switch for each channel
- cue-split function: the cue signal is sent to one side of the headphones and the output-signal to the other side.

5. Overview

Refer to the illustrations on page 2 of this manual.

1	power switch: turn the mixer on or off.
2	3-pin XLR connection for main microphone (not included)MIC LEVEL: adjust the microphone input levelHI/ LOW: microphone equalizer
3	Input channel controls (CH-1 ... CH-4)Input selector switches:Channel 1-2: LINE or PHONO. Set to PHONO if a turntable (not incl.) is connected to the input; otherwise set to LINE.Channel 3: LINE or USB. Set to USB if an input device is connected via the USB port [24]; otherwise set to LINE.Channel 4: LINE or MIC. Set to MIC if a microphone (not incl.) is connected to the input; otherwise set to LINE.TRIM: adjust the input signal levelHI/ MID/ LOW: channel equalizerPeak level meter
4	Master channelLED meter: indicates the master output level
5	TALK OVER: press this button to decrease the sound level for everything other than the main microphone to 14dB. Press again to restore original status.
6	CUE: press this button to monitor the channel with headphones. You can select multiple channels at once, including the master channel and the DSP effects. Press again to cancel the selection.
7	Headphones controlsPHONES: plug a headphone into this jack for audio monitoring.LEVEL: adjust the output level of the headphonesMIXING: mixing adjustment knob. Turn to the left to hear channel(s) selected with CUE switches. Turn to the right to hear master output. At the centre position, the levels for cue and master are even.MONO SPLIT/ STEREO: select the headphones input.MONO SPLIT: the channels selected by the CUE buttons [6] are audible on the left side; the master output is audible on the right side.STEREO: the channels selected by the CUE buttons [6] are audible on both sides, in stereo.
8	Channel fader: set level of the channels with these sliders.
9	Master fader: master volume control
10	CROSS FADER ASSIGN A/ B: select the channels A and B for the cross fader.Note: channels that are not assigned to the cross fader are output without passing through the cross fader.
11	Cross fader curve selector: select one of the cross fader start-up curves (abrupt or smooth transition).
12	Cross fader: moving the slider from left to right will fade in channel B (louder) while fading out channel A (more quiet). In the middle position, both channels are played at equal volume. Use the cross fader assign buttons [10] to select channels A and B.
13	MASTER BALANCE: adjust the left-right balance of the master output
14	Effect controls: adjust the parameters of the effects.
15	EFFECTS: switch effects on or off.
16	DSP EFFECT/ PARAMETER: effect parameter display
17	Effect selector: turn the knob to select a sound effect. Adjust the effect using the effect controls [14].
18	BOOTH MONITOR: adjust the level of the booth monitor
19	POWER SUPPLY INPUT: connect to 230VAC/50Hz power source
20	Balanced master outputs: audio output signal connectors (XLR, symmetrical)
21	Master RCA output: RCA connection to an auxiliary amplifier (not included)
22	BOOTH: RCA connection for booth monitor (not included)REC: RCA connection to recording device (not included)
23	CH4 MIC: microphone input for channel 4
24	CH3 USB: USB input for channel 3
25	Input connectors (CH4-CH1): connect an external device (not incl., e.g. turntable, CD player...) to these RCA (cinch) connectors.
26	SIGNAL GND (ground) connection: when buzzing occurs, connect to turntables to create earth connection.
27	CONTROL A/ B: CD player inputs

6. Cleaning and maintenance

• All screws should be tightened and free of corrosion.
• The housing, visible parts, mounting supports and the installation location (e.g. ceiling, suspension, trussing) should not be deformed, modified or tampered with e.g. do not drill extra holes in mounting supports, do not change the location of the connections.
• Moving mechanic parts must not show any signs of wear and tear.
• The electric power supply cables must not show any damage. Have a qualified technician maintain the device.
• Disconnect the device from the mains prior to maintenance activities.
• Wipe the device regularly with a moist, lint-free cloth. Do not use alcohol or solvents.
• There are no user-serviceable parts.

• Contact your dealer for spare parts if necessary.

• Technical Specifications

power supply 100-240Vac ~ 50/60Hz
power consumption 30W
input terminal CD/LINE 300mV/22Kohm
	PHONO	5mV/47Kohm
	MAIN MIC 5mV/3Kohm
	MIC	5mV/3Kohm
	USB	300mV/22Kohm
frequency response 20Hz-20KHz
S/N ratio CD/LINE 86dB (without effects)
	PHONO	76dB
	MIC	69dB
THD	CD/LINE/PHONO	< 0.02%
	crosstalk	> 70dB
channel equalizer	HI +12dB, -24dB (13kHz)
	MID +12dB, -24dB (1kHz)
	LOW +12dB, -24dB (70Hz)
MIC equalizer	HI +12dB, -12dB (10kHz)
	MID +12dB, -12dB (1kHz)
	LOW +12dB, -12dB (100Hz)
dimensions		320 x 350 x 65mm (12.6" x 13.8" x 2.6")
weight		5kg (11lb)

Use this device with original accessories only. Velleman nv cannot be held responsible in the event of damage or injury resulted from (incorrect) use of this device.

For more info concerning this product and the latest version of this manual, please visit our website www.hqpower.eu.

The information in this manual is subject to change without prior notice.

© COPYRIGHT NOTICE

The copyright to this manual is owned by Velleman nv. All worldwide rights reserved.

No part of this manual or may be copied, reproduced, translated or reduced to any electronic medium or otherwise without the prior written consent of the copyright holder.

Velleman® Service and Quality Warranty

Since its foundation in 1972, Velleman® acquired extensive experience in the electronics world and currently distributes its products in over 85 countries.

All our products fulfil strict quality requirements and legal stipulations in the EU. In order to ensure the quality, our products regularly go through an extra quality check, both by an internal quality department and by specialized external organisations. If, all precautionary measures notwithstanding, problems should occur, please make appeal to our warranty (see guarantee conditions).

General Warranty Conditions Concerning Consumer Products (for EU):

- All consumer products are subject to a 24-month warranty on production flaws and defective material as from the original date of purchase.

- Velleman® can decide to replace an article with an equivalent article, or to refund the retail value totally or partially when the complaint is valid and a free repair or replacement of the article is impossible, or if the expenses are out of proportion. You will be delivered a replacing article or a refund at the value of 100% of the purchase price in case of a flaw occurred in the first year after the date of purchase and delivery, or a replacing article at 50% of the purchase price or a refund at the value of 50% of the retail value in case of a flaw occurred in the second year after the date of purchase and delivery.

• Not covered by warranty:

- all direct or indirect damage caused after delivery to the article (e.g. by oxidation, shocks, falls, dust, dirt, humidity...), and by the article, as well as its contents (e.g. data loss), compensation for loss of profits;

- consumable goods, parts or accessories that are subject to an aging process during normal use, such as batteries (rechargeable, non-rechargeable, built-in or replaceable), lamps, rubber parts, drive belts... (unlimited list);

- flaws resulting from fire, water damage, lightning, accident, natural disaster, etc....;

- flaws caused deliberately, negligently or resulting from improper handling, negligent maintenance, abusive use or use contrary to the manufacturer's instructions;

- damage caused by a commercial, professional or collective use of the article (the warranty validity will be reduced to six (6) months when the article is used professionally);

- damage resulting from an inappropriate packing and shipping of the article;

- all damage caused by modification, repair or alteration performed by a third party without written permission by Velleman®.

- Articles to be repaired must be delivered to your Velleman® dealer, solidly packed (preferably in the original packaging), and be completed with the original receipt of purchase and a clear flaw description.

- Hint: In order to save on cost and time, please reread the manual and check if the flaw is caused by obvious causes prior to presenting the article for repair. Note that returning a non-defective article can also involve handling costs.

- Repairs occurring after warranty expiration are subject to shipping costs.

- The above conditions are without prejudice to all commercial warranties.

The above enumeration is subject to modification according to the article (see article's manual).

NL