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I've obviously not tested this idea but I would be curious whether a better option would have been to go with a set of 165mm door speakers (Focal or Alpine) and something like the Focal IBUS2.1 sub under the driver's seat. I can't face the additional expense and hassle of a new install. I'll no doubt keep tweaking.Īs it stands, with the EQ applied, I'm probably going to live with it. It's still a bit 'woolly' but far less of an issue when you're on the move. I found that around -3dB at 120Hz and +2dB at 60Hz made a big difference. It also tallies with how the system sounds (at least to my ears).īecause I tend to play most of my music through my phone, I downloaded an EQ app and attempted to dial out some of the peaking in the response. This is probably because the speakers are underdamped for the size of the door. The frequency response of the Focals in the T6 showed a significant peaking in the response at around 120Hz.

This is because, in the presence of road noise, the peaking frequency is all you end up hearing. No system has a truly flat response but, especially in car audio, you're looking to avoid large peaks at specific frequencies. This allows you to figure out if you have a flat frequency response. I did a frequency sweep through the speakers and measured the sound level in the cab. Potentially, the165mm Focals woofers will actually be better than the 200s from a fidelity point of view (especially if paired with a sub) but I'm curious about the Alpines because they have a much larger magnet and so, possibly, better damping of resonance.īeing a pedantic chap I borrowed a bit of measurement kit yesterday to figure out what is going on. They are far less harsh than the stock ones. Like I say though, the tweeters are pretty good. Possibly I'm asking for too much but I just thought I'd get a bit more bass but with similar fidelity to the stock drivers. The Focals are fine for dance music but, for me, struggle with other genres.

Upshot is that, if you attempt to turn up the bass via the EQ to improve the quiet bass, the boomy resonance becomes very dominant and tiring to listen to.Īs you say, the stock speakers are limited in terms of bass and volume but do at least have an even bass response and so are, for me, more musical. Basically, the speakers suffers from a large resonant frequency in the van door.

Some bass notes are quiet, others are very boomy. It's horses for courses but the Focals, to my ear, have a very uneven response.

Looks like the Focal amp has a slightly aggressive low voltage cut out. Thanks for the tip on the battery BTW, I noticed today that it doesn't happen if the engine is started immediately after stopping (less battery droop I guess). Potentially, the165mm Focals woofers will actually be better than the 200mm ones from a fidelity point of view (especially if paired with a sub) but I'm curious about the Alpines because they have a much larger magnet and so, possibly, better damping of resonance. Like I say though, the tweeters are pretty good (they are far less harsh than the stock ones). The Focals are fine for dance music but seem to struggle with other genres. Upshot is that, if you attempt to turn up the low frequencies via the EQ (to improve the quiet bass) the boomy resonance becomes very dominant and tiring to listen to.Īs you say, the stock speakers are limited in terms of bass and volume but do at least have an even bass response and so are, for me, more musical.