Features and specifications

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crossover mode selector when used with normal, full range systems, set this switch to “FULL.” If you wish to use the internal crossover to power a driver of specific frequency range, use the “LOWPASS” or “HIGHPASS” settings.

input level control use this control to match the outputs of your head unit to the amplifier. Starting with your head unit set at about the 2 o’clock position, increase the amp level control until distortion begins to occur, and reduce slightly from this point.

low pass frequency control when the crossover selector switch is in “low pass” mode, this control sets the upper frequency limit for audio program sent to the speakers.

high pass frequency control when the crossover selector switch is in “high pass” mode, this control sets the lower frequency limit for audio program sent to the speakers.

bass boost level control this control permits adjustment of the bass level up to an increase of approximately 18 dB.

low level inputs this amp features gold-plated RCA input jacks for high impedance input. Use these with car stereo output which uses RCA-type connector cables.

high level inputs if your car stereo lacks RCA-type output jacks, you may connect speaker output leads to these input connectors.

power LED this indicator is illuminated when power is applied.

protection LED this indicator is illuminated when built-in protection circuitry is activated.

power fuse the fuse protects the amplifier and your car’s electrical system from short circuit conditions.

power terminals use these connectors to deliver power, ground and remote turn-on control to the amplifier.

speaker connections these terminals are 14K gold plated to guarantee high conductivity and minimum signal loss.

output power @ 14.4v DC, 1KHz
RMS Power @ 4 Ohms	40 Watts x 2
RMS Power @ 2 Ohms	60 Watts x 2
Maximum Power Output	300 Watts x 2
frequency response	15 Hz-30 KHz
input impedance
low level inputs	10K Ohms
high level inputs	100 Ohms
input sensitivity		5
low level inputs	250mV	5
high level inputs	2.5V
power supply voltage	14.4V DC Neg. Ground (10.5-16V)
matching speaker impedance
stereo mode	2-4 Ohms
bridged mode	4-8 Ohms
maximum current draw	15A

dimensions (W x H x L)

mm276 x 60 x 209

inches 10.9 x 2.4 x 8.25

PB1881X, PB881X, PB781X, PB481X, PB1281X specifications

Pyramid Car Audio has established a solid reputation for producing high-quality audio systems that enhance the listening experience in vehicles. Their models PB681X, PB1281X, PB481X, PB781X, and PB881X are popular choices among car audio enthusiasts looking for dependable, high-performance sound systems. Each model comes with its unique features and technologies, catering to various listening preferences and vehicle requirements.

The PB681X is an entry-level offering that doesn't sacrifice quality for affordability. This 6x8-inch speaker delivers a powerful 300 watts peak power with a 4-ohm impedance, providing robust sound with impressive clarity. Its durable poly-injection cone and rubber surround ensure extended longevity while enhancing low-frequency response, making it an ideal choice for those who want better sound without breaking the bank.

For those looking for a bit more power, the PB1281X features an impressive 1000 watts peak power with an 8-inch subwoofer. This model is designed with a high-temperature voice coil that minimizes distortion, delivering crisp and clear sound even at high volumes. Its adjustable ported enclosure adds versatility, allowing users to optimize bass response based on individual tastes.

The PB481X offers a unique combination of features aimed at delivering high fidelity sound. This model integrates a 4-channel amplifier with built-in Bluetooth connectivity, allowing for seamless streaming from mobile devices. With 480 watts peak power, it uses advanced circuitry to efficiently manage power output while ensuring minimal interference and maximum sound quality.

Next in line is the PB781X, which blends power with portability. This 7-inch subwoofer packs a whopping 800 watts of peak power and features a heavy-duty magnet structure. The model is designed for easy installation in a variety of vehicle types, making it an excellent choice for anyone looking to upgrade their sound system without extensive modifications.

Lastly, the PB881X stands out as a premium model, offering advanced technologies and superior sound quality. It features an 8-inch subwoofer capable of producing 1200 watts peak power. The high-quality enclosure is optimized for bass performance, while the durable materials ensure protection against wear and tear. Features like adjustable crossover settings and remote bass control increase flexibility for users who want to customize their audio experience.

In summary, Pyramid Car Audio’s PB681X, PB1281X, PB481X, PB781X, and PB881X models present a diverse lineup suitable for different users, from casual listeners to serious audiophiles. With a focus on durability, performance, and ease of use, these products cater to anyone seeking an enhanced automotive audio experience.