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a bad speaker should be under warranty. dealer should be able to swap it out for you.

and this is all without getting into the fact that the power rating on a speaker is a Thermal rating. it says nothing about the performance at that input. the branded audio amplifiers are often running boosted rails, which would give them 20 some, 30 some or 40 some volts to drive the speakers...

a power spec on a multi channel amplifier is not very helpful if you dont know how its calculated. looking at the fuses can tell you a maximum long term power draw, but that also does not tell you much about the actual usable output. Music is VERY dynamic and multi channel amps with very...

using duct tape to seal a port should be air tight, which is good. but its not very stiff, which is bad. something like MDF cut to size with epoxy would be "better". but really you can just do whatever works to create an air tight and stiff closure, assuming you are confident sealing is the...

REW is a free software that can be the center of all things measurement. it can generate and analyze the sound. highly recommended.

the sub delete was only for base audio.

small correction. there is 9 channels of amplifier audio on the B&o 3 on the dash 2 in the kick panel 2 on the C bow 2 gong to the subwoofer. as ragnarkon said, this is split between the ACM and the B&o DSP Amp.

the front lower speakers are smaller than the subwoofer so roll off to prevent wasted low frequency signal on them is likely happening. the subwoofer extends MUCH lower so its rolloff will be receiving more LF than the kick panel speakers. if you were tying the two channels together or only...

the front speakers likely have more rolloff than the sub.

the OEM DSP is likely using two channels to drive the dual coil subwoofer. this would allow the sub to have double the power vs using a single channel.

one thing i would note is that because these speakers are "floating" in the air you will likely not get as much bass as you would expect from the location regardless of what speaker is there. most woofers in cars work on the principle of "corner loading" to aid in the low frequency. if placed...

Oh yeah back then it was a big concern. We've managed to design very low output impedance amplifiers now. Still need to be mindful of damping ratio if you are designing things but the average consumer doesn't.

Yes the output impedance of the amp and the impedance of the load will effect the damping ratio, but it's effect is very small in modern amplification circuits. They are designed with this knowledge in mind. This is why I said small. If you have a proper amp this difference will be insanely...

assuming your time alignment is good, the other things you can check are #1 making sure you are using uncompressed files, and #2 tweaking the upper bass and the upper treble to see if its a matter of taste

use pink noise, RTA and a moving mic measurement with a calibrated mic to get the car close to a CAR TARGET curve. DO NOT use a in room curve as they are different. an OEM system will slightly boost the bass as speed increases to compensate for road noise (id recommend a bass knob in place of...

Neodymium creates a much much stronger magnetic field when compared to a same size ferrite magnet. that PRV has a very dubious frequency response claim, i would stay away.

the best place for this info i have found is on resonixs site: Sound Deadener Independent Testing Data - ResoNix Sound Solutions but note that resonance reduction and blocking exterior noise from entering the cabin are not the same thing.

in regards to the 12", i think it would be way too big to fit. it a common misconception that you NEED multiple hundreds of watts to power larger speakers. remember that the power to output ratio works logarithmically. doubling your power from 300 to 600W only gives you an additional 3db. 3db...

~26Hz iirc, placing a speaker with a much larger magnet volume inside it will push that a TINY bit higher though.

a few things to note: #1 impedance of the coil has little effect on how a speaker "sounds", it is the result of design decisions made during development of the speaker. the impedance of the speaker should be selected with thought of the amplifier that will power it. #2 the B&o speaker is a...