HIDIZS MP145 PRO Planar HiFi IEMs User Manual
14.5mm Ultra-Precision Nano-Grade Planar In-Ear Monitors
1. Introduction
Thank you for choosing the HIDIZS MP145 PRO 14.5mm Ultra-Precision Nano-Grade Planar HiFi In-Ear Monitors (IEMs). Building on the success of previous models, the MP145 PRO represents an evolution in sound, combining cutting-edge planar magnetic technology with a commitment to ocean conservation. This manual provides essential information for setting up, operating, and maintaining your new IEMs to ensure an optimal listening experience.
The MP145 PRO is designed to deliver an immersive, reference-grade listening experience, offering transparent sound with controlled bass, a rich midrange with minimal coloration, and exceptional treble extension for a wider, more expansive soundstage. These key upgrades across its design, magnetic circuit, diaphragm, cable, and connectivity elevate the auditory experience to a new level.
2. Package Contents
Please check the box for the following items:
- 1 x MP145 PRO IEMs (pair)
- 1 x Premium Leather Case
- 1 x HIDIZS x WDC Badge Pin
- 1 x User Manual
- 1 x Warranty Card
- 2 x Interchangeable Plugs (3.5mm SE & 4.4mm BL)
- 1 x MP145 PRO Earphone Cable
- 9 Pairs x Silicone Eartips
- 3 Pairs x HIDIZS Pneumatic Sound Tube Filters (High-Frequency/Balanced/Low-Frequency)
- 3 Pairs x Exclusive 'Sea Anemone' High-End Liquid Silicone Eartips (S/M/L)

3. Specifications
The HIDIZS MP145 PRO IEMs feature advanced technology for superior audio performance:
| Feature | Specification |
|---|---|
| Model | HIDIZS MP145 PRO |
| Product Name | MP145 PRO 14.5mm Ultra-Precision Nano-Grade Planar HiFi In-Ear Monitors |
| Earphone Type | Custom-Fit Planar HiFi In-Ear Monitors |
| Driver | 14.5mm Ultra-Large Planar Magnetic Driver |
| Diaphragm | 14.5mm Ultra-Precision Nano-Grade Planar Diaphragm |
| External Magnet Design | 1T External Magnet Design |
| Appearance | CNC-machined One-piece Aluminum Alloy Design |
| Tuning Filters | High Frequency - Silver, Balanced - Rose Gold, Low Frequency - Red |
| Cable Material | 6N High-Purity Silver-Plated Single-Crystal Copper 4-Core Braided Cable |
| Cable Plug | Interchangeable Plug 3.5mm SE and 4.4mm BL (Gold-Plated Plug) |
| Detachable Earphone Connector | 2-Pin 0.78mm |
| Cable Length | 1.2m |
| Weight | Approx. 19g (Excl. earphone cable) |
| Frequency Response | 20Hz - 40kHz |
| Sensitivity | 104dB |
| Impedance | 30Ω |
| Ultra-Low Distortion | <0.05%@1kHz |


4. Setup
4.1 Connecting the Cable
- Identify the left and right IEM units. The cable connectors are typically marked (e.g., red for right, blue for left, or L/R indicators).
- Align the 0.78mm 2-pin connector on the cable with the corresponding port on each IEM unit. Ensure the pins are correctly oriented.
- Gently push the connectors until they are firmly seated. Do not force them.
- Attach the desired interchangeable plug (3.5mm SE or 4.4mm BL) to the other end of the earphone cable.
4.2 Choosing Ear Tips
The MP145 PRO comes with 9 pairs of standard silicone ear tips and 3 pairs of exclusive 'Sea Anemone' high-end liquid silicone eartips in various sizes (S, M, L). Experiment with different sizes and types to find the best fit for comfort and sound isolation. A proper seal is crucial for optimal bass response and overall sound quality.

4.3 Using Tuning Filters
The MP145 PRO features 3 interchangeable pneumatic sound tuning filters, allowing you to customize your sound experience:
- High Frequency (Silver): Ideal for instrumental, orchestral, anime soundtracks, and complex arrangements, enhancing separation and clarity.
- Balanced (Rose Gold): Perfect for Mandopop, J-Pop, and emotional vocals, offering a balanced sound that brings vocals forward with natural warmth.
- Low Frequency (Red): Designed for bass-heavy genres like EDM, rock, and pop, this filter deepens the bass and adds more immersion to your music.
To change a filter, gently unscrew the current filter from the nozzle of the IEM and screw in the desired filter. Ensure it is securely fastened but do not overtighten.

5. Operating Your IEMs
Once assembled and fitted with your preferred ear tips and tuning filters, connect the 3.5mm or 4.4mm plug to your audio source (smartphone, digital audio player (DAP), dongle DAC, or Hi-Fi system). The MP145 PRO is compatible with a wide range of audio devices due to its 104dB sensitivity and 30Ω impedance, ensuring optimal performance across various setups.

6. Maintenance
6.1 General Care
- Always store your MP145 PRO IEMs in the provided premium leather case when not in use to protect them from dust, scratches, and physical damage.
- Avoid exposing the IEMs to extreme temperatures, humidity, or direct sunlight.
- Do not pull the cable forcefully when disconnecting; always grip the plug or connector.
6.2 Cleaning
- Ear Tips: Remove the ear tips from the IEMs and clean them with mild soap and water. Rinse thoroughly and allow them to air dry completely before reattaching.
- IEM Shells: Wipe the IEM shells with a soft, dry, lint-free cloth. For stubborn dirt, slightly dampen the cloth with water. Avoid using harsh chemicals or abrasive materials.
- Nozzles: Periodically check the IEM nozzles for earwax buildup. Use a small, soft brush or the included cleaning tool (if any) to gently remove any debris. Ensure no debris enters the driver unit.
- Cable: Wipe the cable with a soft, dry cloth. If necessary, use a slightly damp cloth, then dry immediately.
7. Troubleshooting
- No Sound:
- Ensure the cable is securely connected to both the IEMs and the audio source.
- Check the audio source's volume level and ensure it's not muted.
- Test with a different audio source or cable to rule out component failure.
- Verify that the correct audio output is selected on your device.
- Poor Sound Quality (e.g., weak bass, distorted sound):
- Ensure ear tips create a proper seal in your ear canal. Try different sizes or types of ear tips.
- Check for debris in the IEM nozzles that might be obstructing sound.
- Ensure the tuning filters are correctly installed and not loose.
- Test with high-quality audio files to ensure the source material is not the issue.
- Uncomfortable Fit:
- Experiment with all provided ear tip sizes and types.
- Adjust the cable over your ear to find a comfortable position. The ergonomic design is intended for extended comfort.
- Cable Issues (e.g., intermittent sound, crackling):
- Ensure all cable connections (2-pin to IEMs, interchangeable plug to cable, cable to source) are secure.
- Inspect the cable for any visible damage.
8. User Tips
- Bass Enhancement: Users have noted that the bass response can be significantly enhanced and controlled with equalization (EQ), providing a thumping, punchy, and rumbling experience without bleeding into other frequencies.
- Comfortable Fit: Despite their potentially massive appearance, many users find the MP145 PRO to fit surprisingly well, flush and secure, allowing for comfortable extended listening sessions.
- Build Quality: The IEMs are praised for their clean, high-quality manufacturing and solid, sturdy cable, contributing to a premium feel and durability.
9. Frequently Asked Questions (FAQ)
Q: Are the MP145 PRO IEMs suitable for gaming?
A: Yes, the MP145 PRO's transparent sound, precise imaging, and expansive soundstage make them an excellent choice for immersive gaming experiences, allowing you to accurately pinpoint in-game audio cues.
Q: Can I use my own custom cable with the MP145 PRO?
A: The MP145 PRO uses a standard 0.78mm 2-pin connector, which is a common standard. You can use compatible aftermarket cables, but ensure they are of good quality to maintain optimal sound performance.
Q: What is the significance of the 'Whale-inspired Bionic Breathing' design?
A: The hidden ventilation ports, inspired by whale tail fins, optimize airflow within the IEMs. This design enhances sound transparency and balance while improving bass and high-frequency performance, contributing to the overall acoustic quality.
10. Warranty and Support
Your HIDIZS MP145 PRO IEMs come with a Warranty Card included in the package. Please refer to this card for detailed information regarding warranty coverage and terms. For further assistance, technical support, or inquiries, please contact HIDIZS customer service through their official website or the contact information provided on your Warranty Card.
A digital version of the user manual is also available for download. You can find the User Manual (PDF) at: HIDIZS MP145 PRO User Manual (PDF).