2-channel car amplifier
   125 watts RMS x 2 at 4 ohms (190 watts RMS x 2 at 2 ohms)
   380 watts RMS x 1 in bridged mode (4-ohm stable in bridged mode)
   selectable low-pass filter (80 Hz, 12 dB per octave)
   selectable bass boost (0, 6, 12 dB at 50 Hz)


Pioneer GM5300T Review:   A really good amp doesn't just provide power. It also offers options for customizing the sound in your vehicle. The 2-channel GM-5300T provides a selectable 50Hz bass boost and a built-in crossover for fine-tuning your tunes. Plus, it comes with speaker level inputs for easy connection to an OEM head-unit.Bass boost gives you more control over how your music sounds. It lets you set the optimal bass level for each speaker/sub connected to the GM-5300T, so the tone controls from your head-unit can do what they do best. And because this is selectable bass boost, you can set the level at 0dB, 6dB, or 12dB, whichever sounds best to you.Built into the GM-5300T is a very smart crossover network. It works like a gateway, routing the big bass signals (80Hz or lower, at -12dB/octave) to the speaker that handles them best, filtering out higher-frequency signals to that speaker. This optimizes your system's efficiency and delivers the best possible sound quality.The GM-5300T's speaker level inputs allow you to connect your OEM unit (or any unit that doesn't have the typical RCA-type inputs) without having to buy add-on adapters. So, the install goes faster, you save money, and you've got a Pioneer amp in your vehicle.

   2-channel car amplifier
   170 watts RMS x 2 at 4 ohms (250 watts x 2 at 2 ohms)
   500 watts RMS x 1 bridged output at 4 ohms (4 ohm stable in bridged mode)
   high-pass (12 dB per octave) and low-pass (24 dB per octave) filters variable from 50 to 200 Hz
   variable bass boost (0-18 dB at 40 Hz)


KENWOOD 7204 Review:   2-channel car amplifier * 170 watts RMS x 2 at 4 ohms (250 watts x 2 at 2 ohms) * 500 watts RMS x 1 bridged output at 4 ohms (4 ohm stable in bridged mode) * high-pass (12 dB per octave) and low-pass (24 dB per octave) filters variable from 50 to 200 Hz * variable bass boost (0-18 dB at 40 Hz) *

   75 watts RMS x 4 channels at 4 ohms with less than 1% THD
   12 db built-in electronic crossover
   Variable bass boost of 0 to 6 db
   One pair of full-range preamp outputs
   Port for future accessory products


Harman Kardon Infinity Reference 475a Review:   4-channel car amplifier * 75 watts RMS x 4 at 4 ohms (90 watts RMS x 4 at 2 ohms) * variable high- and low-pass filters (32-320 Hz, 12 dB/octave) * variable bass boost (0-6 dB at 50 Hz) * preamp-level inputs and outputs *

Sony XM-1652Z Review:   With a 1000 Watts of power and clean, top-quality transmission, consider this amp an open invitation to crank the volume without fear of distortion. In Graphite Gray. MOSFET Power Supply Balanced Input Circuit Speaker Level Input 2-Channels 1000 Watts Gold Plated Connectors Graphite Gray

   4-channel car amplifier
   40 watts RMS x 4 at 4 ohms (50 watts RMS x 4 at 2 ohms)
   100 watts RMS x 2 in bridged mode (4-ohm stable in bridged mode)
   4-channel selectable high- and low-pass filters (80 Hz, 12 dB per octave)
   speaker-level inputs


Pioneer GM4300F Review:   The 4-channel GM-4300F delivers a grinding 400 watts max (40 watts x 4 or 100 watts x 2 at 4 ohms; 50 watts x 4 at 2 ohms) - plenty of juice to power your high-quality speakers. It?s also got built-in 4-channel crossovers. Speaker level inputs for easy connection to an OEM head unit. Oversized power terminals. And a wide input level of 400mV to 6.5V.Having more power isn't just about LOUD. It?s also about CLEAN, getting the most out of your speakers and your music. Constant road noise makes it hard for the music to be heard clearly. But with 400 watts max. power, you'll get to hear all the words and all the notes.For getting the music just the way you like it, 4-channel crossovers are tough to beat. You can route the low frequency signals (80Hz or lower, -12dB/octave) to the speakers that handle them best, and filter out the higher-frequency signals. This optimizes your system's efficiency and delivers the best possible sound quality.What, you DON'T own a Pioneer head unit? The GM-4300F's speaker level inputs allow you to connect your OEM unit (or any unit that doesn't have the typical RCA-type inputs) without having to buy add-on adapters. SO, the install goes faster, you save money, and you've got a Pioneer amp in your vehicle.

   4-channel car amplifier
   50 watts RMS x 4 at 4 ohms (75 watts x 4 at 2 ohms)
   180 watts RMS x 2 bridged output at 4 ohms (4 ohm stable in bridged mode)
   high-pass (12 dB per octave) and low-pass (24 dB per octave) filters variable from 50 to 200 Hz
   variable bass boost (0-18 dB at 40 Hz)


KENWOOD 8404 Review:   4-channel car amplifier * 50 watts RMS x 4 at 4 ohms (75 watts x 4 at 2 ohms) * 180 watts RMS x 2 bridged output at 4 ohms (4 ohm stable in bridged mode) * high-pass (12 dB per octave) and low-pass (24 dB per octave) filters variable from 50 to 200 Hz * variable bass boost (0-18 dB at 40 Hz) * cooling fan *

   Class D Monoblock Subwoofer Amplifier
   High-Damping Class D Circuit with discrete control circuitry
   Differential-Balanced Input Topology: 1 pair of inputs
   On-board Crossover: Fully-variable (40-200 Hz), selectable-slope (12 or 24 dB per octave) LP
   Bass EQ: Single-band parametric with variable boost up to 15dB and Remote Bass Option


JL AUDIO 500/1V2 Review:   Class D Monoblock Subwoofer Amplifier High-Damping Class D Circuit with discrete control circuitry Differential-Balanced Input Topology: 1 pair of inputs On-board Crossover: Fully-variable (40-200 Hz), selectable-slope (12 or 24 dB per octave) LP Bass EQ: Single-band parametric with variable boost up to 15dB and Remote Bass Option

   Boom the base with non-bridgeable 2-channel MOSFET amplifier
   40 watts of RMS power x 2; 100 watts of max power x 2
   Heavy-duty aluminum alloy heatsink, soft turn-on circuit, remote on/off circuit
   Continuously variable input gain control
   Nickel-plated RCA and speaker level inputs


BOSS AUDIO CH150 Review:   Feel the music as you drive with the two-channel, non-bridgeable Boss Audio CH150 MOSFET amplifier, which provides an RMS power range of 40 to 100 watts over two channels. It features a heavy-duty aluminum alloy heatsink, soft turn-on circuit, remote on/off circuit, and continuously variable input gain control. A MOSFET amplifier offers superior thermal stability, which provides the power supply a fast response, excellent linearity, and high efficiency.

Tech Talk RMS versus Peak Power: Peak power is measured by a brief musical burst (such as a crashing cymbal) and refers to the maximum amount of power that a device can produce from such a burst. However, a more reliable specification is RMS (root square mean) power, which measures the maximum continuous power that an audio device can produce. With a higher RMS figure, your music will sound cleaner as well as louder.

   2-channel car amplifier
   65 watts RMS x 2 at 4 ohms (100 watts RMS x 2 at 2 ohms)
   200 watts RMS x 1 bridged output at 4 ohms (4-ohm stable in bridged mode)
   variable low- and high-pass filters (low-pass from 50-250 Hz, high-pass from 80-1200 Hz, at 12 dB per octave)
   stereo or bridged mono output


Profile AP400 Review:   2-channel car amplifier * 65 watts RMS x 2 at 4 ohms (100 watts RMS x 2 at 2 ohms) * 200 watts RMS x 1 bridged output at 4 ohms (4-ohm stable in bridged mode) * variable low- and high-pass filters (low-pass from 50-250 Hz, high-pass from 80-1200 Hz, at 12 dB per octave) * stereo or bridged mono output *

   50 watts RMS x 4 channel and 150 watts RMS x 1 channel at 4 ohms
   12 db built-in electronic crossover
   Variable bass boost of 0 to 6 db
   Remote bass-level control included
   Port for future accessory products


Harman Kardon Infinity Reference 5350a Review:   5-channel car amplifier * 50 watts RMS x 4 150 watts RMS x 1 at 4 ohms (60 watts RMS x 4 300 watts RMS x 1 at 2 ohms) * variable high- and low-pass filters (32-320 Hz, 12 dB/octave) * variable bass boost (0-6 dB at 50 Hz) * preamp-level inputs and outputs *