Blaupunkt EMA 455

4-channel car amplifier — 55 watts RMS x 4

Item #: 023EMA455

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2 Reviews

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Blaupunkt will power your music

Blaupunkt's EMA 455 4-channel amplifier will power your front and rear car speakers with 55 watts RMS each — plenty enough to give you the extra clarity and impact you want for your music. Selectable high-pass filters let you clean up the sound even more, by removing the extreme low rumble from your full-range speakers, great if you're using a subwoofer.

Bridged to 2-channel mode, the EMA 455 can run two high-performance speakers or subwoofers with up to 165 watts each. Variable low-pass filters give you extra control over your sub, and a bass boost lets you bump up your punch a couple of notches when you need it.

A heavy aluminum heatsink helps keep this compact amp running cool and reliably. Speaker-level inputs let you connect it to a factory radio with no RCA outputs, so you won't need a line output converter or other device in order to play music.

Blaupunkt EMA 455

EMA 455 input and control panel

Product Highlights:

  • 4-channel car amplifier
  • 55 watts RMS x 4 at 4 ohms (80 watts RMS x 4 at 2 ohms)
  • 165 watts RMS x 2 in bridged mode (4-ohm stable in bridged mode)
  • Class AB amp technology
  • selectable high-pass filters (80 Hz, 12 dB/octave)
  • variable low-pass filters (50-250 Hz, 12 dB/octave)
  • separate bass boosts on front and rear channels (0, 6, or 12 dB at 45 Hz)
  • preamp and speaker-level inputs
  • fuse rating: 20A x 2
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 11-3/4"W x 2-1/8"H x 7-1/4"D
  • warranty: 1 year
  • 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 EMA 455 Reviews

Average Customer Review:

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Clean and Clear Sound

Written By natural engineer, South Carolina on Monday, January 05, 2015

Crutchfield Customer Review (What's this?)

I installed this amp in my 2001 Porsche Boxster in place of the Haes 4x40. Huge improvement in the clarity of sound and I now have the ability to set the crossover if I want to. I had to make an adapter from the factory quick connector to transition to the RCA and lug terminals, but that was not too difficult. I wanted the ability to go back in case this unit did not provide the desired sound. No worries there -- I will not be going back. I also installed the Blaupunkt Toronto head unit and replaced the door and dash speakers with Hertz. Now it sounds like it should, top up or down!

Pros: Clean sound, flexibility of connections and crossover points, good power, looks good in the trunk.

Cons: None noted.

Great amp

Written By Billy, Houston, MS on Friday, December 26, 2014

Crutchfield Customer Review (What's this?)

Great product and easy to set up

Pros: Plenty of power

Cons: None

Hands-on research

What's in the box?

Download owner's manual

  • Four channel amplifier
  • Two 11" Speaker level input harnesses
  • Four 20-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 200 mV to 10 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 controls; 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; 0.325" wide

Speaker Terminals: four pair of screw terminals; 0.325" wide

Line Level Input: two pair of stereo RCA jacks; front and rear

Speaker Level Input: two ports for the included speaker level input harnesses; front and rear

Fuses: two 20-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.