AquaHear 1.5 PDF
Easy Setup
- Connect Hydrophone to Preamp:
Plug the hydrophone cable into the preamplifier via the BNC connector. - Connect Preamp to Headphone Amp:
Connect the aux cable from the preamplifier to the headphone amplifier input. - Connect Headphones:
Plug your headphones into the headphone amplifier output. - Power On:
Charge the headphone amplifier with the provided Type C cable if needed.
Insert a 9V battery into the preamplifier and turn on the power of the headphone amp.
Everything is ready for use.
Contents
- Natako Audio AquaHear 1.5 Hydrophone
- Natako Audio RigidEnhancer Hydrophone Preamplifier
- OneOdio A71 Studio Headphones
- HiFi Headphone Amplifier
- Cables for all of the equipment
AquaHear 1.5 Hydrophone
Product Description
The Hydrophone with Disk Piezoelectric Element is a high-performance underwater microphone designed for precise and reliable acoustic measurements. Featuring an improved frequency response and a resonance at approximately 19kHz, this hydrophone is ideal for capturing a wide range of underwater sounds with exceptional clarity and detail. The piezoelectric element is shielded to prevent noise interference, ensuring clean and accurate signal capture. The hydrophone has a BNC male connector and a 5-meter-long RG174 coaxial cable, providing flexibility and ease of connection to your recording equipment. Encased in a durable, 3D-printed housing coated with a double layer of polyurethane compound, this hydrophone is built to withstand harsh underwater environments. Whether you’re conducting marine research, underwater surveillance, or acoustic monitoring, this hydrophone offers superior performance and durability.
Specifications
Properties
- Sensitivity:
-195dB (Vre:µPa) @ 1kHz to 15kHz
-208dB (Vre:µPa) @ 16kHz to 25kHz - Improved Frequency with resonance at approximately 19kHz
- RG174 coaxial cable, 5 meters in length
Electricity
- BNC male connector
- Disk piezoelectric element
Practicality
- Submersible up to 30m depth in water
- Shielded piezoelectric element to prevent noise
- 3D-printed case with double-layer polyurethane coating
- Designed for Marine research, underwater surveillance, acoustic monitoring, and more
RigidEnhancer 1.1 Hydrophone Preamplifier
The RigidEnhancer 1.1 is a portable, high-input-impedance voltage preamplifier designed for passive capacitive piezoelectric hydrophones and contact microphones. It amplifies the low-level voltage produced by the sensor, providing a stronger signal for connection to compatible audio recorders, audio interfaces, data-acquisition systems, oscilloscopes, amplifiers, and other measurement or recording equipment.
The RE1.1 is an updated version of the RigidEnhancer 1.0, developed to provide accurate selectable gain, convenient battery operation, and improved performance with high-impedance recording and measurement equipment.
Documents
Selectable gain
The preamplifier provides five manually selectable voltage-gain settings:
- 5 dB
- 15 dB
- 25 dB
- 35 dB
- 45 dB
The external five-position control makes it easy to match the gain to the signal level and application.
Lower gain settings provide greater high-frequency bandwidth and are recommended for stronger signals and wideband ultrasonic work. Higher gain settings are useful for weak audio-frequency and lower-ultrasonic signals, provided that the input level is kept low enough to avoid clipping.
Hydrophone compatibility
The RE1.1 is intended for passive capacitive piezoelectric hydrophones. Its recommended source-capacitance range is 10 nF to 30 nF, with a 20 nF source used during testing.
Because this is a voltage preamplifier, its effective charge-to-voltage sensitivity depends on both the selected gain and the capacitance of the connected hydrophone.
The BNC female input allows a compatible hydrophone to be connected directly to the preamplifier. The 3.5 mm output can be connected to compatible recording or measurement equipment using an appropriate audio cable.
For the best gain accuracy, output headroom, and battery life, connect the output to equipment with an input impedance of at least 10 kΩ. A higher input impedance is preferable when available.
Frequency response and output capability
With the 50 Hz notch network excluded from the measured signal path, the direct-voltage response did not reach a low-frequency −3 dB point down to 1 Hz.
High-frequency bandwidth depends on the selected gain. Preliminary measurements found:
- More than 400 kHz bandwidth at 5 dB gain
- Approximately 139 kHz bandwidth at 25 dB gain
- Approximately 18 kHz bandwidth at 45 dB gain
The lower gain settings are therefore better suited to wideband or ultrasonic applications. The 45 dB setting is better suited to weak signals within the audio and lower-ultrasonic ranges.
Portable enclosure and controls
The preamplifier is housed in a durable 3D-printed enclosure designed for portable and long-term use. Its accessible controls and replaceable batteries make it suitable for field measurements, underwater listening, acoustic experiments, equipment testing, and portable recording setups.
Important operating notes
- Use a recorder or measurement input with an impedance of at least 10 kΩ.
- Use lower gain settings when greater high-frequency bandwidth is required.
- At higher gain settings, reduce the hydrophone signal level if clipping occurs.
- Replace the batteries if the output becomes unstable or the available output level decreases.
- For extended unattended recordings, consider an external higher-capacity power option.
- If mains-frequency interference is present, software filtering may be used during recording or post-processing.
A71 Studio Headphones
Introduction
High-quality and Comfortable. The Perfect headphones for Finding the Leak in your Pool with Ease.
Description
The A71 Studio Headphones by OneOdio is one of the cleanest-looking headphones we found. But it’s only the cherry on top of their amazing sound quality and properties.
As you can see from the Hi-Res Audio logo, the audio quality of these Headphones is exceptional. From Deep bass to clear mid-high range sounds, these headphones provide you with hyper-pure and clear sound. To keep you listening a for long time, they are equipped with Super-Comfortable foam and adjustable fit.
Specifications
Properties
- Hi-Res Audio Verification
- 40mm Dual Dynamic Drivers
- Low weight
Practicality
- Up to 7cm Adjustable size
- True Protein Memory Foam for all-day comfort
- Rotatable ear-cups for any use
- Plastic Material
HiFi Headphones Amplifier
Introduction
Delicate, Compact, and Portable headphone amplifier that outputs excellent sound without any distortion.
Specifications
Properties
- 5mm AUX Input
- 5mm AUX Output
- Supports 16-150 Ω impedance
- Maximum Power Output: 250mW in Impedance 16 Ω
- About 8 hours of usage time
- About 100g
Practicality
- Volume Control knob
- Aluminum clean matte surface
- Gain Switch
What Comes with it
1 x USB Power Cable
1 x Audio Cable
1 X User Manual
*Attention*
Using the HiFi Headphones Amplifier while charging is not recommended. do it at your own risk.
