Quote:
Originally Posted by CTGT2005
Most of the benefit from the HK system is going to come from the EQ sound processing that is on the HK system. The factory Hifi speakers are not bad for reasonable listening volumes. I've measured both the Hifi and HK midrange drivers, which perform almost the same in terms of frequency response and distortion. I can share some THD graphs of both when I can get back to my PC.
The limitations of the Hifi system is they do not run a low pass on the midrange allowing it to play well into the 10-15khz range and the tweeter only runs a 6db high pass which keeps it playing down to frequencies that distortion may be audible. The midrange also has a peaking upper response on the Hifi system that makes the sound less full and a bit grainy. There's a wide band between the mid and tweeter that overlaps killing the imaging and clarity of the sound.
If you do end up going with upgraded speakers, go with components that offer a dedicated high and low pass filter combination. I am putting Morel IR-42 Reference speakers $$$ in my car soon, which barely measure from a harmonic distortion perspective better than the factory Hifi speakers in most frequencies.
If I were trying to spend my money best bang for the buck, go with an audiotec fisher match amp or bimmertech amp first, swap the tweeters with some upgrade silk domes like come in the morel system mt-250, add a 2nd order hpf/LPF 3.5khz and put a dedicated 10" subwoofer in the trunk. Skip the underseat woofers if you want real bass. The underseat woofers need to play well into the the 100-200hz range to pick up with the midrange leaves off. Switching them to more powerful woofers to bring up sub bass frequencies ends up muddying the midbass and doesn't integrate well with the rest of the front stage
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Really appreciate the detail here, thank you.
Because you've clearly thought about this, do the increased number of speakers in the hifi vs. HK make much of a difference in terms of upgradability?