Best Adjustable Output Level

Pyle Hydra Marine Amplifier - Upgraded Elite Series 1000 Watt 4 Channel Bridgeable Amp Tri-Mode Configurable, Waterproof, MOSFET Power Supply, GAIN Level Controls and RCA Stereo Input(PLMRA420)

...avy duty Aluminum Alloy heatsink, thermal overload speaker short protection and LED light indicator. These are to protect the amp and your vehicle's electrical system from short circuit conditions.
POWERFUL 1000 WATT: This amplifier is powerful with its 1000 WATT maximum and dual MOFSET power supply. Comes with dual adjustable input GAIN level controls of 10k Ohm (Low) and 100 Ohm (High) speaker impedance.
MARINE GRADE: With its Marine rating of IP-01, it is waterproof ready. It’s constructed with gold plated speaker output terminal connectors as well to combat corrosion with long term use.
Waterproof four-channel, bridgeable MOSFET power amplifier with 4 x 250 Watts maximum output.
Variable high- and low-pass filters with crossover mode selector.
High-level MOLEX and gold-plated low-level RCA inputs with adjustable input level.
Overload, Short Circuit, and Thermal protection with LED indicator.
Variable bass boost of up to 18dB at 60Hz.

The P500-12P is a self-contained amplified subwoofer system featuring a single 12″ high output subwoofer in a high output vented enclosure and a built in 500-watt class-D amplifier.
Designed for hatchback, sedan, and SUV applications, the P500-12P can be connected via speaker level inputs for connection to factory systems, or traditional line level inputs for aftermarket systems.
Featuring adjustable 12db/Octave low pass crossover, built-in adjustable bass boost EQ, hi-level/low-level inputs, built-in 0°/180° phase switch and includes Remote bass level control.
Precision constructed MDF ported wedge enclosure with heat activated vinyl finish, measuring H x W x D1 x D2 15″ x 24.76″ x 10.91″ x 7.71″.
Famous Rockford Fosgate build quality with a full 1-year warranty when purchased from an authorized Rockford Fosgate reseller.

RCA FUNCTION HIGH TO LOW: The Converter allows you to get RCA line level outputs from your high-level output device. It also can convert the high-voltage signal output of the amplifier or speaker to the low-voltage signal, improve sound quality.
ADJUSTABLE ATTENUATION: Provide the level gain adjustment. Use the adjustment rotate button, you can adjust the bass down without having to pull over and manually adjust the input level of the amplifier to the minimal one, very convenience.
HIGH-QUALITY SOUND: No need to worry about interrupted sound, static or loss of quality during an important event because this cable is made with highly durable construction and delivers premium performance without noise, static, or buzzing.
EASY TO INSTALL: Provides amplifier remote turn-on output w/out removing car stereo. Just connect the wire between the speaker & the amplifier. Red input.
Connect to the amp line of the right channel. White input.
MAXIMUM INPUT POWER: Constructed from durable aluminum alloy. 45W per channel.

Six input and output channels with level controls | Independent Front, Rear, and Subwoofer equalization | Fully adjustable 24dB / Octave Linkwitz-Riley selectable crossover.
ACR-3 Dash Control Remote Included | Discrete Input and Output level controls with clipping indicators | 12-volt Remote Turn On Output | Built in Pink Noise for easy Signal Delay and Equalizer tuning and system set-up.
Total Harmonic Distortion: 0.01% | Frequency Response: 10Hz-22kHz | Equalizer Frequencies (front/rear): 125Hz, 175Hz, 250Hz, 500Hz, 1kHz, 2kHz, 8kHz | Equalizer Frequencies (sub): 31.5Hz, 40Hz, 50Hz, 63Hz, 80Hz, 100HZ, 125Hz.
PFM Frequency: 20Hz or 30Hz selectable | Crossover Frequency: 50Hz-500Hz selectable | Signal Delay Max (Left/Right): 10ms | Signal Delay Max (Front/Sub): 35ms.

Six input and output channels with level controls | Independent Front, Rear, and Subwoofer equalization | Fully adjustable 24dB / Octave Linkwitz-Riley selectable crossover.
ACR-3 Dash Control Remote Included | Discrete Input and Output level controls with clipping indicators | 12-volt Remote Turn On Output | Built in Pink Noise for easy Signal Delay and Equalizer tuning and system set-up.
Total Harmonic Distortion: 0.01% | Frequency Response: 10Hz-22kHz | Equalizer Frequencies (front/rear): 125Hz, 175Hz, 250Hz, 500Hz, 1kHz, 2kHz, 8kHz | Equalizer Frequencies (sub): 31.5Hz, 40Hz, 50Hz, 63Hz, 80Hz, 100HZ, 125Hz.
PFM Frequency: 20Hz or 30Hz selectable | Crossover Frequency: 50Hz-500Hz selectable | Signal Delay Max (Left/Right): 10ms | Signal Delay Max (Front/Sub): 35ms.

Front Adjustable EQ Band Frequencies: 125 Hz, 500 Hz, 3.5 kHz, 12 kHz.
Rear Adjustable EQ Bands Frequencies: 50 Hz, 600 Hz, 6.3 kHz.
Switchable Subwoofer Filter 32 Hz – 128 Hz, Frequency Response 10 Hz – 15 kHz.
Inputs: Dual 2 Channel Source. Outputs: Front, Rear & Sub. Fader Control.
Gain + / - 18 dB, Maximum Input Voltage 15 Volts, Maximum Output Voltage 8 Volts.
Signal to Noise Ratio 003e 110 dB, Channel Separation 20 dB, Total Harmonic Distortion 0.050.
Dimensions: Depth 4.6” x Width 7” x Height 1”.

Use the Bully Performance Audio BP-LOC15 when adding an amplifier to a factory radio to convert the radio's speaker level output to the lower....
EASY TO INSTALL: Just connect the wire between the speaker & the amplifier..
RCA FUNCTION HIGH TO LOW: The Converter allows you to get RCA line level outputs from your high-level output device. It also can convert the....
ADJUSTABLE ATTENUATION: Provide the level gain adjustment. Use the adjustment rotate button, you can adjust the bass down without having to pull over....
HIGH-QUALITY SOUND: No need to worry about interrupted sound, static or loss of quality during an important event because this cable is made with....