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Blaupunkt GTA 470 SF power amplifier

Enjoy lots of power and superb sound, all wrapped up in a tough-looking case that'll add some style to your car audio system. The Blaupunkt GTA 470 SF 4-channel car amplifier puts out 70 watts RMS per channel, great for driving two pairs of full-range speakers or components. In 2-channel mode, you can run two subwoofers with up to 200 watts RMS of power each. The high- and low-pass filters let you contour the sound to get maximum performance from your speakers or subs.

Product Highlights:

  • 4-channel car amplifier
  • 70 watts RMS x 4 at 4 ohms (100 watts RMS x 4 at 2 ohms)
  • 200 watts RMS x 2 bridged (4-ohm stable in bridged mode)
  • adjustable low-pass filter (50-250 Hz)
  • switchable high-pass filter (80 Hz)
  • selectable bass boost (0, 6, 12 dB at 60 Hz)
  • preamp inputs
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • fuse rating: 25A x 2
  • 17-3/4"W x 2-1/16"H x 7-13/16"D
  • warranty: none (Crutchfield's 60-day satisfaction guarantee applies)
  • Our 60-day money-back guarantee

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Blaupunkt GTA 470 SF Reviews

Average Customer Review:

1 Review

blaupunkt GTA 470 SF 4 ch

Written by: soteriosd from Camas,Wa. on March 29, 2013

Crutchfield Customer Review (What's this?)

My radio now sounds like I never installed an amplifier.



Crutchfield response on April 2, 2013 We forwarded this review to our Technical Support team for follow-up. Lifetime tech support comes with every Crutchfield purchase.

Hands-on research

What's in the box?

Download owner's manual

  • Four channel amplifier
  • Four 25-amp ATO fuses (2 installed/ 2 spare)
  • Four 3/4" Self-tapping screws
  • Owner's manual (English/ German/ French/ Spanish/ 18 other languages)

Product Research



Level Control: independent rotary gain controls for the front and rear sections of the amp; continuously variable from 100 mV to 8 V

Crossover: the front and rear sections of the amp have independent crossover controls:

  • Mode: Low Pass, Flat (crossover is bypassed), High Pass (fixed at 80 Hz)
  • Low Pass Frequency: continuously variable from 50 to 250 Hz

Bass Boost: the front and rear sections of the amp also have independent bass boost conntrols; three position switches; 0, +6 dB, +12 dB; centered at 45 Hz


Power/Ground: screw terminals; 0.5" wide, 8 gauge wire recommended

Remote Turn-on: screw terminal; 0.34" wide

Speaker Terminals: four pair of screw terminals; 0.34" wide

Line Level Input: two pair of stereo RCA jacks

Fuses: two 25-amp ATO fuses

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.