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Blaupunkt GTx 663 DE

6-3/4" 3-way car speakers

Item #: 023GTX663D

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15 Reviews | Ask Questions

Installation gear for most cars

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Get your soundstage back

Blaupunkt's GTx 663 DE 6-3/4” speakers offer the sonic clarity you want for your music at a budget-friendly price. They're a great option for replacing factory speakers that have lost their "stage presence."

Each GTx 663 DE speaker features an injected polypropylene (IPP) woofer for a lively response from your mids and lows. The 3-way speaker design also includes a 1" Mylar dome tweeter and 1/2" super tweeter which deliver all the details and ambience in your music. The speakers' low profile enables you to install them behind the factory grilles in many vehicles, but they also include stylish protective grilles for custom installations.

Product Highlights:

  • 6-3/4" 3-way car speakers (pair)
  • injected polypropylene woofer with foam surround
  • 1/2" dome super tweeter and 1" Mylar dome tweeter
  • black steel basket
  • power range: 2-50 watts RMS (220 watts peak power)
  • frequency response: 40-22,000 Hz
  • sensitivity: 93 dB
  • top-mount depth: 2-1/4"
  • grilles included
  • warranty: 1 year
  • Our 60-day money-back guarantee

Why replace your factory speakers?

The speakers that originally came in your car were made from inexpensive materials, designed to create acceptable sound at the lowest possible cost to the manufacturer. If you love music, you deserve better. Name-brand aftermarket speakers deliver fuller, richer sound with considerably more detail and nuance, and they're capable of playing louder and cleaner than factory speakers. Connect new speakers to your factory radio and you'll get the best possible sound from your dealer-equipped system. Pair them up with a new car stereo for a level of enjoyment that can rival a high-fidelity home audio experience.

Blaupunkt GTx 663 DE Reviews

Average Customer Review:

15 Reviews

Great Speakers

Written by: wylie70 from Alabama on December 28, 2015

1996 Nissan Maxima
Crutchfield Customer Review (What's this?)

Great economical replacement for OE speakers. Excellent sound quality, even at loud volume levels.




Written by: Anonymous from Florida on November 16, 2015

2013 Toyota Tundra
Crutchfield Customer Review (What's this?)

This speakers sound horrible. One of the speakers start making buzzing sound after a few songs, like something was loose. I disassemble panel to check if some screws was loose but it was not the case.



Crutchfield response on November 17, 2015 Once we saw this review, our Tech Support team reached out to help the customer. We'll either help him get the speakers working the way they should, or help him return them for an exchange or refund.

Blaupunkt GTx 663 DE

Written by: Anonymous from Washington on October 11, 2015

Crutchfield Customer Review (What's this?)

Seem like nice speakers, they pump out the bass with little rattle. Easy to install.

Pros: Good quality, nice bass.

Cons: Nothing I can think of yet.

Good but lacking in the Bass Department

Written by: Otto from Wyoming on July 12, 2015

Crutchfield Customer Review (What's this?)

Bought these to replace my factory door speakers in my 05 corolla. I must say these do pretty well for the price,,, But after having them for some time now I have noticed that they are really lacking in the Bass department. I now these are only $70 and I know not to expect to be blown away but sound quality but the Bass is really lacking and at least to my ears its the same if not a tiny bit better than the factory paper one I took out...... I will be swapping these out very soon for some Kicker 40CS674 6-3/4" speakers. A friend of mine has these and they hit a lot harder than these Blaupunkt GTx 663 DE's .... But if bass in not to high on the list for you and you want a good speaker than does mid's and high's very well with okay bass then I would really recommend these. Turn the music up and PLAY ON!

Pros: Very good mids and highs. Solid well designed housing and construction. Price is really good

Cons: Really lacking in the bass department.

Great Speakers

Written by: Kim from Wisconsin on July 10, 2015

Crutchfield Customer Review (What's this?)

Install was very easy and they sound great in my Rav4



Good Speakers not too much bass

Written by: Mariosanto from California on May 25, 2015

2001 Toyota 4Runner
Crutchfield Customer Review (What's this?)

Good speakers. Highs and miss are good. Bass response is weak. I suppose that for the size, the speakers are a good buy. Well made and easy to install.



Great sounding speakers

Written by: adcase from Ohio on April 7, 2015

2012 Chevrolet Sonic
Crutchfield Customer Review (What's this?)

I installed these in my mom's chevy sonic (which didn't come with rear speakers). The speakers sound great with the stock head unit. My mom is very happy.

Pros: Good sound when paired with the stock head unit.

Cons: None

Nice speakers

Written by: Indyerf from Indiana on March 19, 2015

2003 Pontiac Vibe
Crutchfield Customer Review (What's this?)

Installed 4 in an 03 Vibe. Installation quick and easy with mounting bracket and harness. Speakers not as 'bassy' as OEM, but sound great with original stereo and amp. Mids and Hi freq sound clearer, will be trying a Pioneer HU in next. Would definitely recommend for the price.

Pros: Installation ease Price Sound

Cons: Too bad the door panel covers these great looking speakers Light on bass response

Better than the factory installed Clarions

Written by: peter w from San Diego area on March 4, 2015

2005 Nissan Sentra
Crutchfield Customer Review (What's this?)

Installed in an 05 Sentra, Had to open up the mounting holes slightly - used a step bit. Installation sheet helped IMMENSELY, spot on instructions. I never knew I had fold- down rear seats until today ! The included wiring adapters made life a whole lot easier.

Pros: very good form fit and function

Cons: mounting holes askew

good quality for the dollars

Written by: RayC from Nebraska on January 31, 2015

1999 Jaguar XJ8
Crutchfield Customer Review (What's this?)

Once again I have trusted my choice to Crutchfield and one again, they have come through. I had them professionally installed on my 99 Jag. With prior experience of Blaupunkt I knew I had a relatively inexpensive but good buy. I knew these would be good for my Jag, and I wasn't wrong. It seems the sound is better with the volume set at 14 or 15, rather than cranking them up past 20. I tried all three forms of music that is installed on the Jag. Radio, cd, and yes, even a cassette. The sound level was the same for all three Even with the HK installed system, I was literally amazed at the clearness of the cassette tape and gave it two thumbs up. I then picked out a good ol rock and roll station and set the bass a little heavier, The speakers thumped right along and I could feel the air moving around down by my left leg. I jacked the volume up two, and let it roll. I then faded the speakers to the back ones and cranked it up more. I was not unhappy with the results. Having passed that test, I then moved on to a cd. AC/DC and "Thunderstruck" My favorite foot stomping and head noggin music. I cranked up the volume and bass and once again I was not disappointed as to the sound. I was raised on rear deck speakers and have to admit that the speakers in the doors also provide good sound throughout the car. All in all, I rate these 3 ways as a good buy

Pros: good sound, good quality

Cons: none at this time

Blaupunkt GTx 663 DE

Written by: Manny F from Aberdeen on January 2, 2015

Crutchfield Customer Review (What's this?)

Sounds ok highs and mids sound great not to much


Cons: Not to much bass

Nice sound at a reasonable price

Written by: Photoguy1057 from Ohio on January 1, 2015

2009 Chevrolet Express
Crutchfield Customer Review (What's this?)

Crisp highs and tight bass make these a good buy for the money.

Pros: Good tight bass Accurate bright highs


Difficult Install on '05 Prius

Written by: JohnV from Reston, VA on June 15, 2014

I bought the Blaupunkt GTx 663 DE speaker to replace the blown out woofer in the driver's side door on my '05 Prius with Navigation and JBL package. The speaker is the correct size, but the screw holes do not line up. The existing speaker had four ears to mount to the existing bracket, the Blaupunkt speaker does not. I'm disappointed with Crutchfield because the web says says this will fit using the existing brackets, but it does not. I will now have to search for an adapter bracket.



Crutchfield response on June 23, 2014 We forwarded this review to our Technical Support team for follow-up. Lifetime tech support comes with every Crutchfield purchase.

Blaupunkt GTx 663 DE

Written by: Trbsami from Indianapolis, IN on February 15, 2014

Crutchfield Customer Review (What's this?)

Nice quality, fit well and sound great in my `06 Express van front doors.

Pros: Crisp

Cons: none

Decent speakers

Written by: Decent, but not impressive from Lawrenceburg Indiana on February 5, 2014

1996 Toyota Camry
Crutchfield Customer Review (What's this?)

I bought these speakers to replace the front speakers in my Camry. They are good looking speakers and seem to be well built. The install was pretty easy (about an hour). The only complaint I have is that these speakers distort when turned up above half way when the speakers are rated a lot higher than my head unit is. Other than that they sound pretty good at lower volumes.

Pros: Sturdy, Good looking,good highs

Cons: Distortion, Lows

Hands-on research

What's in the box?

Download owner's manual

  • Two 3-way speakers
  • 2 Grilles
  • Two 12' Lengths of speaker wire (each has female quick-slides on one end and tinned bare wire on the other)
  • Eight 1-1/8" Self-tapping screws
  • 8 Speed clips
  • Manual
  • Template

Product Research


Size Classification Note: Some manufacturers, including Blaupunkt, call this size speaker a 6-1/2". Because it requires a larger cutout than a standard 6-1/2" speaker, Crutchfield has traditionally referred to this size woofer as a 6-3/4". Please refer to the Crutchfield Vehicle Selector to confirm fit in your vehicle.

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