by Pyramid
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Review & Description
Pyramid prides itself on solid car audio without the huge price tag. The PB717X is no exception, featuring two MOSFET-powered channels of 50 watts RMS (75 watts at 2 ohms), bridgeable for subwoofers, and selectable high- and low-pass crossover modes for different applications.
Pyramid prides itself on solid car audio without the huge price tag. The PB717X is no exception, featuring two MOSFET-powered channels of 50 watts RMS (75 watts at 2 ohms), bridgeable for subwoofers, and selectable high- and low-pass crossover modes for different applications.
 Solid car audio without the huge price tag. Click to enlarge. |
 View output diagram. |
 View input diagram. |
Bridgeable
Delivers two channels or bridge mono for subwoofers. The PB171X cranks out 2 x 50 watts RMS at 4 ohms and is 2-ohm stereo stable for 75 watts x 2.
Selectable Crossover Modes
The built-in crossover can be set to full for normal full-range systems, or low-pass/high-pass for delivering specific frequencies to components or subwoofers. Low-pass and high-pass frequency controls are provided for setting the crossover frequencies.
Input Versatility
The PB717X includes both high-level and low-level inputs, so you're covered with the various types of car stereos. The high-level inputs take direct speaker wire leads, while the low-level use RCA plugs.
To further match the amplifier to your receiver/head unit, a variable input level control is provided to dial in the perfect setting without distortion.
Bass Boost
Subwoofer fans rejoice: The PB717X features a bass boost of up to 18 dB, for added rumble.
MOSFET Power
The MOSFET pulse width modulated power supply helps provide excellent sound quality, minimal distortion, and efficient power handling.
Comprehensive Protection
High-performance audio requires a lot of power, and things can get hot quickly. Like any solid car amplifier, the PB717X features protective circuits. Overload and thermal indicators let you know they've activated and shut off the amp. In the event of a short circuit, power protection is provided in the form of easily replaceable fuses.
PB717X Specs
| RMS power @ 4 ohms: | 50 watts x 2 |
| RMS power @ 2 ohms: | 75 watts x 2 |
| Maximum power output: | 500 watts x 2 |
| Input impedance/sensitivity (low-level): | 10k ohms / 200 mV |
| Input impedance/sensitivity (high-level): | 100 ohms / 5V |
| Signal/Noise ratio: | 90 dB |
| THD: | Less than 0.04% |
| Frequency response: | 15-30 kHz |
| Dimensions: | 9.84 x 10.03 x 1.96 inches (L x W x H) |
| Power supply voltage: | 14.4V DC negative ground |
| Maximum current draw: | 30A |
What's in the Box
Pyramid PB717X power amplifier and user's manual. Read more
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