1/4" TS to 3.5mm TRS Hydrophone Preamplifier
18dBV Gain, active Plug-In Power (PiP) amplifier
Regular price
$45.00
- Connects passive hydrophones (like the H1a) or high-impedance instruments (piezo contact mics, electric guitars) to standard consumer microphone inputs
- Utilizes the same trusted, low-noise buffering circuitry found inside the popular H2d hydrophone
- Dual-Mono Output: Pre-wired to drive both the left and right audio channels simultaneously, maximizing signal strength and ensuring compatibility with standard stereo mic inputs
- Runs on the Plug-In Power (PIP) supplied by your recording device, eliminating the need for external batteries or extra power cables
NOTE: This amplifier is not waterproof.
What's Included:
- 1/4" TS to 3.5mm TRS Hydrophone Preamplifier
We are committed to prompt service. Many standard hydrophone variants are kept in stock and often ship the next business day. Custom builds are frequently completed within one week, depending on quantity and configuration.
We ship worldwide using trusted carriers including UPS, FedEx, DHL, and USPS. Shipping rates are calculated at checkout. International customers may be responsible for import duties, taxes, or brokerage fees assessed at delivery by their country and carrier.
Transit times and customs clearance can occasionally cause delays outside our control. Customers using their own courier account, freight forwarder, or uninsured shipping methods assume additional responsibility once the shipment leaves our facility.
For complete details on shipping methods, insurance, international shipments, delays, freight forwarding, and liability terms, please see our full Shipping Policy.
- Aquarian made products are backed by a 1-year limited warranty covering defects in materials and workmanship under normal use.
- Resold products manufactured by third parties may be covered by the original manufacturer’s warranty, where applicable.
- Returns of unused, like-new products are generally accepted, subject to inspection and approval.
Please review our full policies for details on custom products, misuse conditions, returns, exclusions, and limitations.
PIP (plug-in power) is required and may need to be enabled within the menu settings of your audio device.
Plug-in-power is a bias current used extensively in consumer audio devices, typically used with electret microphones. Unfortunately, there is no standard for PIP. Compliance voltage and bias current vary widely between components.
This module is configured for most common recorder interfaces and wired for dual-mono output—driving both left and right channels and using PIP from both channels. It will also work well, providing additional gain, when driving a single input channel. Because of these uncertainties relating to bias power, performance from this module will vary. May not work with very low-current devices.
The following specifications are based on a typical stereo PIP supply of 2.5V volts though a 2.2K bias resistor and two driven channels. See previous page* for more detail.
20 Hz to 20 kHz unweighted, RMS voltage, unless otherwise noted:
| Gain | 10 dB 1 | |
| Noise | < 10µV | 10nF shunt |
| Response | +0 / -1 | dB |
| THD | <0.3% 2 | |
| Input | 6.3mm TS | |
| Z in | 300 KΩ 4 | |
| Max input | 150mV 1 | 10% THD |
| Output | 3.5mm TRS 3,4 | |
| Z out | 1.1 KΩ 1 | |
1 These specs are strongly influenced by the PIP supply*
2 Harmonic distortion is higher than many amps because of the low-voltage class “A” operation required for PIP. However, clipping is soft at high amplitude and distortion is not noticeable at normal amplitudes.
3 Standard connectors—also referred to as 1/4” and 1/8” mono and stereo phone plugs respectively.
4 Can be modified per user