Our next set of 6 x 9 car speakers comes from Pioneer, a well-known electronics corporation based in Japan. This company was originally founded as a radio and car-speaker repair shop, and its beginnings in audio-equipment manufacturing have made a significant impact on its car speakers today. Their Pioneer TS-A6993R car speakers are quite above average, bringing great peak power handling and an amazing frequency response range, reaching up to 37 kHz on the top end. If you're looking for a full-featured car speaker that will reach up into those ultrasonic frequencies to add extra depth to your music, these Pioneer 6 x 9 car speakers are a great choice.

Pioneer is a leader in the consumer electronics industry, and the company's focus on audio has made it one of the recognized authorities in this market. Its lines of market-leading products have set a precedent under which these car speakers perform well. The attention to detail that is apparent in these car speakers make Pioneer's experience obvious; the company's engineering and efficient approach to car speaker construction impressed us.

The most remarkable aspect of the Pioneer TS-A6993R car speakers is its four built-in tweeters. These targeted devices specialize in high-frequency reproduction, focusing a lot of their power on creating ultrasonic sound above the 20 kHz threshold of human hearing. With a range of 30 Hz to a staggering 37 kHz, these car speakers will be able to reproduce everything from very low bass notes to dog-whistle high notes. Of course, unless you're trying to wake up every dog on your street, this range will only serve to add an extra layer of sound that you can feel rather than hear.

The amazing frequency response range makes for a very clean and impressive listening experience, launching this product into the top half of our lineup. The sound is the fullest of any car speaker we reviewed, bringing every nuance out of the music that we could hope to hear. However, the speakers do have a tendency to distort when they reach higher volume levels, and they seemed to begin distorting at a lower volume than other car speakers did. In the end, we were impressed with the wide scope of the sound this car speaker provides, but we are less impressed with how well it handles distortion.

Pioneer does relatively well with its customer support, providing both email and telephone contacts for questions that you may have about your new car speakers. It will be likely that you will need to call or send an email since we couldn't find any information about the car speakers themselves in the company's online FAQs section. In addition, the knowledgebase is occasionally down, making it difficult to find timely answers to our questions online.