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Power and style

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 270 SF 2-channel car amplifier puts out 70 watts RMS per channel, great for driving a pair of full-range speakers or components. In mono mode, you can run a subwoofer with up to 200 watts RMS of power. The high- and low-pass filters let you contour the sound to get maximum performance from your speakers or subs.

Product Highlights:

  • 2-channel car amplifier
  • 70 watts RMS x 2 at 4 ohms (100 watts RMS x 2 at 2 ohms)
  • 200 watts RMS x 1 bridged (4-ohm stable in bridged mode)
  • adjustable low-pass filter (50-250 Hz)
  • switchable high-pass filter (80 Hz)
  • variable bass boost (0-12 dB at 45 Hz)
  • preamp inputs and outputs
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • fuse rating: 20A x 1
  • 12-1/4"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 270 SF Reviews

Average Customer Review:

4 Reviews

For the price, not bad.

Written by: JoelMc from Bowling Green, KY on January 30, 2013

Crutchfield Customer Review (What's this?)

I had an MTX Thunder amp that went bad. I needed a comparable amp to drive an 8" Memphis Audio sub in a sealed enclosure. I bridged the Blaupunkt, and it gives off plenty of power. I'm running it direct from a factory stereo, with an LOC, so it's not the cleanest signal. The amp's built in crossover doesn't cut it.

Pros: Price. Power. Design(it looks alright if that matters)

Cons: Not a great Crossover.

Powerful amp in a small package

Written by: Nihilus from Port Washington, WI on January 16, 2013

Crutchfield Customer Review (What's this?)

The Blaupunkt GTA 270 blew me away on how much power it provided my 10" subwoofer. The price was fantastic as well. Extremely satisfied with my purchase. I just love turning up the radio in my SUV now. Thanks Crutchfield!

Pros: Power, price, funtionality

Cons: none

Great Amp

Written by: Mike from El Dorado Hills, CA on January 4, 2013

Crutchfield Customer Review (What's this?)

Amp works great. 200RMS for a single sub is a good amount of power. The fact that it is bridgeable and has an electronic crossover built in makes it amazing at this price point. Used this with the Blaupunkt 12" Sub and it's a great combo. Recommended.

Pros: price, crossover, bridgeable

Cons: none so far.


Written by: JM from Springfield il on January 2, 2013

Crutchfield Customer Review (What's this?)

I had extremely low expectations for this amp... I needed a cheap amp for one sub, and surprisingly this worked. Bridged and ran with kicker. Hit pretty good. Running over half will distort, but it worked pretty good. For entry level paired with one sub, it worked.

Pros: Good value

Cons: Good value

Hands-on research

What's in the box?

Download owner's manual

  • Two channel amplifier
  • Two 20-amp ATO fuses (1 installed/ 1 spare)
  • Four 3/4" Self-tapping screws
  • Owner's manual (English/ German/ French/ Spanish/ 18 other languages)

Product Research



Level Control: rotary gain control; continuously variable from 100 mV to 8 V

Crossover Mode: three position switch; Low Pass, Flat (crossover is bypassed), High Pass (fixed at 80 Hz)

Low Pass Crossover Frequency: continuously variable from 50 to 250 Hz

Bass Boost: rotary control; 0-12 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: two pair of screw terminals; 0.34" wide

Line Level Input: one pair of stereo RCA jacks

Line Level Output: one pair of stereo RCA jacks

Fuse: one 20-amp ATO fuse

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.