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Boss PH4.700

2800W, 4 Channel Phantom Series Amplifier

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Specials with this product

  • Free Ground Shipping to the 48 statesdetails
  • Phantom Series 4-Channel Class A/B Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 280 watts x 4 chan.
  • Max Power Rating:
    • 2 ohms: 700 watts x 4 chan.
    • Bridged, 4 ohms: 1400 watts x 2 chan.
  • Max power output: 2800 watts
  • Bridgeable outputs
  • MOSFET PWM Power supply
  • Wired remote bass level control included
  • LED power and protection indicators
  • Variable 0 +/- 18 dB Bass boost
  • Trimode operation to connect a pair of speakers plus a subwoofer on one pair of output channels
  • Thermal and speaker short protection
  • Heavy duty black anodized heatsink
  • Soft turn-on circuit
  • Remote turn-on/turn-off circuit
  • Gold-plated RCA High and low level inputs
  • Gold-plated screw terminals
  • Fixed high-pass crossover (50-150 Hz)
  • Variable low-pass crossover (45-90 Hz)
  • Frequency response: 9-50,000 Hz
  • Dimensions: 9-1/2" D x 22"W x 2-1/4"H
  • 0/1-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • 1-year Manufacturer's warranty
Power Specifications - Full Range Channels
RMS Power @ 4 ohms280 watts x 4 channels
RMS Power @ 2 ohmsN/A
RMS Power @ 1 ohmN/A
Bridged RMS Power1400 watts x 2 channels
Peak Power Output700 watts x 4 channels
Amplifier Specifications
Amplifier ClassAB
Number of Channels4
Total Peak Power Output2800 watts
Total RMS Power Output1120 watts
Maximum Input Gauge Size1/0 AWG
Minimum Impedance Unbridged2 ohms
Minimum Impedance Bridged4 ohms
THD at Rated RMS Power0.01%
Speaker Level InputsYes
Preamp OutputsNo
Built-in CrossoverLow-pass (LP)
High-pass (HP)
Full (AP)
High-Pass Crossover Frequency50 - 150 Hz
Low-Pass Crossover Frequency45 - 90 Hz
Subsonic FilterN/A
Signal-to-Noise Ratio103 dB
Channel Separation90 dB
Bass Boost0 - 18 dB
Bass/Gain RemoteYes
Fan CooledNo
Fuse Rating40A x 2 
CEA-2006 CompliantNo
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration1 year
Labor Warranty Duration1 year
Warranty ProviderManufacturer
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Main Product
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Boss PH4.700Boss PH4.700$169.99

Product Summary

Manufacturer: Boss
Model number: PH4.700
UPC: 791489112147
Weight: 17.50 lbs
Internal SKU: ph4700
Internal product ID: 33979

Price Information

$379.99

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$169.99

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Customer Testimonial

Very surprised at the customer service overall. It's very rare anymore to not have to jump through several hoops for an exchange or refund. And the amp is still pounding hard (fingers crossed) but anyways thank you Sonic I will be doing all future business with you. A new customer for life.

- Aronn B. from Atchison, KS

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