1. Introduktion
Tak for købetasing the BLOW PRMX 4-Channel USB Audio Mixer. This compact analog mixer is designed for versatile audio applications, including live stage performances, recording studios, and DJ setups. It offers a range of features such as a USB input for MP3 playback, an integrated echo effect, and multiple input/output options. This manual provides comprehensive instructions to help you set up, operate, and maintain your mixer for optimal performance.
2. Produktet er slutview
The BLOW PRMX 4 is a low-noise, four-channel analog mixer housed in a durable metal casing. It features a user-friendly interface with essential controls for each channel and master output.
Nøglefunktioner:
- Four-channel analog mixer
- USB input for MP3 file afspilning
- Integrated echo effect with repeat and delay options
- Jack socket for external effect processors
- Two XLR microphone inputs and two 6.3mm Jack/RCA inputs
- +48V Phantom power for condenser microphones and DI boxes
- 3-band equalization, AUX send, pan display, and FX effect on each channel
- Stereo line output (6.3mm Jack) and RCA output
- Headphone output with independent volume control
- INSERT slots on channels 1 and 2
- Robust metal casing
Komponentidentifikation:

Figur 2.1: Øverst view of the BLOW PRMX 4 mixer. This image displays the overall layout of the mixer, including all channels, controls, and the USB player section.
Refer to Figure 2.1 for a visual guide to the mixer's controls and connections. Each channel features GAIN, HIGH, MID, LOW (EQ), AUX, EFF, and PAN controls, along with a volume fader. The master section includes controls for DELAY, REP (Repeat), PHONES, AUX SEND, EFF SEND, and the MAIN output fader. The USB player section has a digital display and control buttons.

Figure 2.2: Close-up of the input and output connections. This image highlights the various ports for microphones, line inputs, main outputs, and auxiliary connections.
Figure 2.2 shows a detailed view of the input and output jacks. Channels 1 and 2 feature XLR microphone inputs and 6.3mm LINE inputs with INSERT points. Channels 3/4 offer 6.3mm LINE inputs and RCA inputs. The main output section includes REC (RCA), MAIN OUT (6.3mm Jack), AUX, and PHONES outputs.
3. Opsætning
Follow these steps to set up your BLOW PRMX 4 mixer:
- Strømtilslutning: Ensure the mixer's power switch is in the OFF position. Connect the provided power cable to the mixer's power input and then to a suitable electrical outlet (240VAC / 50-60Hz).
- Mikrofonforbindelser:
- For dynamic microphones, connect them to the XLR inputs (MIC 1, MIC 2).
- For condenser microphones, connect them to the XLR inputs and activate the +48V Phantom Power switch located in the master section. Ensure all channel gains are turned down before activating phantom power to prevent damage to equipment.
- Linjeindgangsforbindelser:
- Connect instruments or line-level devices (e.g., keyboards, CD players) to the 6.3mm LINE inputs on channels 1-4 or the RCA inputs on channels 3/4.
- Hovedudgangsforbindelse: Tilslut din amplifier, powered speakers, or recording device to the MAIN OUT (6.3mm Jack) or REC (RCA) outputs.
- Hovedtelefonforbindelse: Plug your headphones into the PHONES jack for monitoring.
- External Effects Processor (Optional): If using an external effects unit, connect its input to the AUX SEND and its output to the FX RETURN (if available, or an unused line input).
- USB-enhed: Indsæt et USB-drev, der indeholder MP3 files i USB-porten til afspilning.
- Tænd: Once all connections are secure, switch the mixer's power ON.
4. Betjeningsvejledning
This section details the operation of the BLOW PRMX 4 mixer's various controls.
4.1 Kanalkontroller (Kanal 1-4)
- GEVINST: Adjusts the input sensitivity for the connected microphone or line source. Start with this control at its minimum and gradually increase until a healthy signal level is achieved without clipping (PEAK LED).
- HIGH, MID, LOW (EQ): These knobs control the treble, midrange, and bass frequencies for each channel. Use them to shape the tone of your audio source.
- AUX: Sends a portion of the channel's signal to the AUX output, typically used for monitor mixes or external effects.
- EFF: Sends a portion of the channel's signal to the internal echo effect or an external effects processor connected to the FX return.
- PANDE: Adjusts the stereo position of the channel's signal, moving it between the left and right main outputs.
- Kanal fader: Styrer det samlede lydstyrkeniveau for den enkelte kanal, der sendes til hovedmixet.
- PEAK LED: Lyser, når indgangssignalet er for højt, hvilket indikerer potentiel clipping. Reducer GAIN-kontrollen, hvis denne LED lyser ofte.
4.2 Hovedsektionens kontroller
- +48V Phantom Power: Aktiverer fantomstrøm til kondensatormikrofoner tilsluttet XLR-indgange.
- FORSINKE: Adjusts the delay time of the integrated echo effect.
- REP (gentag): Controls the number of repetitions for the echo effect.
- TELEFON: Justerer lydstyrkeniveauet for hovedtelefonudgangen.
- AUX SEND: Controls the overall level of the signal sent to the AUX output.
- EFF SEND: Controls the overall level of the signal sent to the internal echo effect or external effects.
- HOVED-fader: Controls the overall volume level of the stereo main output.
- Niveaumåler: Displays the output level of the main mix. Aim for levels that are strong but do not consistently peak into the red.
4.3 USB MP3 Player Operation
The integrated USB player allows you to play MP3 files direkte fra et USB-flashdrev.
- Indsæt et USB-drev, der indeholder MP3 files i USB-porten.
- Use the control buttons (Play/Pause, Next, Previous, Mode) to navigate and play tracks. The digital display will show track information.
- Adjust the volume of the USB player using its dedicated level control or by routing it through an available channel.

Figure 4.1: User interacting with the mixer controls. This image demonstrates a user adjusting the various knobs and faders on the mixer during operation.

Figure 4.2: Mixer with headphones for monitoring. This image shows the mixer connected to headphones, illustrating its use for private audio monitoring.
5. Vedligeholdelse
Korrekt vedligeholdelse sikrer din mixers levetid og optimale ydeevne.
- Rensning: Brug en blød, tør klud til at rengøre mixerens yderside. Ved genstridigt snavs kan du bruge en let tør klud.amp en tør klud kan bruges. Undgå slibende rengøringsmidler eller opløsningsmidler.
- Støvbeskyttelse: Hold mixeren dækket til, når den ikke er i brug, for at forhindre støvophobning, især på fadere og knapper.
- Opbevaring: Opbevar mixeren et køligt, tørt sted væk fra direkte sollys og ekstreme temperaturer.
- Kabelstyring: Sørg for, at alle kabler er pænt organiseret og ikke er under belastning for at forhindre beskadigelse af stik og porte.
6. Fejlfinding
If you encounter issues with your BLOW PRMX 4 mixer, refer to the following common problems and solutions:
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Ingen lydudgang |
|
|
| Forvrænget lyd |
|
|
| Mikrofon virker ikke |
|
|
| USB-afspilleren virker ikke |
|
|
7. Specifikationer
Detailed technical specifications for the BLOW PRMX 4-Channel USB Audio Mixer:
- Type: Four-channel analog mixer
- Frequency Response (Headphones): 20Hz - 20kHz
- Total harmonisk forvrængning (THD): <0.01 %
- Signal-til-støj-forhold (SNR): >110dB
- Output Level: +/- 1V
- Linjeinput følsomhed: +/- 150mV
- Mikrofonindgangsfølsomhed: +/- 1.5mV
- Strømkrav: 240VAC / 50-60Hz
- Dimensioner (L x B x H): 210 x 245 x 55 mm (8.27 x 9.65 x 2.17 tommer)
- Forbindelse teknologi: Hjælpeudstyr, USB
- Lydindgang: Jack 6.3mm, XLR, RCA
- Bolig: Metal
8. Garanti og support
This product is manufactured by BLOW. For specific warranty information, please refer to the documentation provided at the time of purchase or contact your retailer. General support inquiries can be directed to the BLOW customer service channels.
Please note that specific details regarding warranty duration and terms are not available in this manual. Keep your proof of purchase for any warranty claims.

Figure 8.1: Product packaging for the BLOW PRMX 4 mixer. This image shows the retail box, which may contain additional warranty or support information.





