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Blaupunkt EMA 455

4-channel car amplifier — 55 watts RMS x 4

Item #: 023EMA455

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5 Reviews | 3 questions - 3 answers


Price Break:-$40.00

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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:

5 Reviews

Awesome amp

Written by: Donald from suffolk, VA on January 30, 2016

Crutchfield Customer Review (What's this?)

I installed this in my Yukon to replace the factory amp which had gone bad. I put my back two door speakers which are 61/2" kenwoods to 2 channels and bridged the other 2 channels to run a Rockford fosgate 8" 4ohm sub. The clarity and sound is very clear. Im very happy with my purchase..

Pros: Distortion level is very low, Amp has adjustments to dial things in..

Cons: none

Blaupunkt EMA 455

Written by: Jeremy from denver, CO on January 30, 2016

Crutchfield Customer Review (What's this?)

A great upgrade.

I replaced the OEM amp in my FR-S with this to get more volume out of the door speakers, and later to add a sub. Even just replacing the door speaker amp was a significant improvement. More interface options (variable high-pass, and phase select) would be kind of nice, but keeping the input chain simple is the way to go since most modern head units have time delay.

Pros: -Clean sound -Simple setup (if you already have sufficient amp wiring)


Blaupunkt EMA 455

Written by: TheHotRodGuy from Florida on December 27, 2015

Crutchfield Customer Review (What's this?)

I installed this unit to be able to push new speakers that I had installed in my car (2015 Kia Soul), I liked that the footprint of the unit was not too big. The unit had more than enough power to push the new speakers. The sound in the car now is well balanced, before the Sub was overwhelming the rest of the speakers because they did not put out enough sound.

Pros: Easy to install and the footprint was not too large, plenty of power. I liked that the unit supported four different speaker configurations.


Clean and Clear Sound

Written by: natural engineer from South Carolina on January 5, 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 from Houston, MS on 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.

Customer Q&A

Crutchfield asked  
Why did you buy this?

This amp meets my needs. I particularly liked the low THD plus I have always been partial to Blaupunkt. [ Ivan R Fernande  Jan 20, 2016 ]
Plenty of power, Bass Boost on frnt, & rear channels, and a incredible .08% THD @ 85 Descibles !! Oh ahh - a good Price !!! [ James R.  Dec 12, 2015 ]

3 questions already asked

If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. You can also post your question in our forums: Or try our online support center: [ Krissy  Sep 08, 2015 ]  Staff
2 ohms, but 4 ohms in bridged mode [ Jeffrey  Aug 22, 2015 ]
I forwarded your question to an Advisor and they responded with the following: You can run that amp in a 3 channel mode. The front speakers would get 55 watts RMS power each. The back 2 channels could be bridged together and provide 165 watts RMS power for a subwoofer. It is also important to note that the when bridged the subwoofer channel would only be stable at a 4 ohm resistance. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy  Nov 11, 2014 ]  Staff