Currently in my 340i I have the Harman Kardon surround system which I think is 1 step up from the standard 12 speaker Harman. I also noticed that the HiFi has 2 powerful subwoofers located in the central area of the cabin whereas the Harman Kardon only has 1 subwoofer located in the trunk. Realistically, I just want the very best bass and sound BMW Harman Kardon amplifier. Compared to the 8-channel amp found in the entry-level BMW stereo systems (and the HK S674A system, for that matter), the BMW Harman Kardon amplifier has 10 channels, with more power to boot. Unlike other factory options, it also uses fiber optic wiring to keep its digital signal as clear as possible, to keep your Rest assured, our audio upgrades will deliver. Whether the sound system in your BMW G30 is Base, Hi-Fi (S676A) or Harman Kardon (S688A) the Alpha One Speaker Upgrade and Alpha One Amplifier will enhance your sound clarity, balance, richness and power. But on top of that, they are going to bring you sounds matching your preferences. Harman Kardon (S688A) – the top-tier BMW audio system available in the 3-Series. It contains 16 Harman Kardon BMW speakers (7x Midrange, 7x Tweeter, 2x Harman Kardon Underseat Woofer) and a 10-channel amplifier connected to the head unit with fiber optic cable. (NOTE: The Top HiFi system has a digital 10-channel amplifier. Harman Kardon Speaker Upgrades. Does anyone have a Bavarian Soundwerks speaker set upgrade for their HK speakers? I understand it includes 8 speakers but does not include the 2 subs in the reardeck enclosure. (too hard to get to, I guess. dunno.) $600 seems like a lotta coin for what's essentially a solution to replace your crappy HK paper HK is a nice upgrade. BW. I don't see a reason to spend that much on higher quality speakers because of all the (driving) background noises you have when using it. I believe a (driving) car interior is not an ideal environment to enjoy that kind of (sound) quality. 686 posts · Joined 2014. #2 · Dec 27, 2014. I didn't get the HK system. I heard the regular speakers were good enough. So I spend the money on the lighting package. 2015 F36 428iGC DINAN S4 PCD:10/29/2014. 2015 F26 x4 xDrive28i. 2012 E70 x5 xDrive35i. BMWCCA #494914. There is a Spotify playlist called "Harmon Kardon 05.02.22" which 1) has a really fun and eclectic mix of all types of music and 2) it takes advantage of the ranges of the HK system to help you better adjust the equalizer. My equalizer is more or less a "U-shape," but I do make tweaks when I hear different music. .

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