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Anyone have an Alpine CDA-9807 CD/Mp3 headunit?


paulr33
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Hi All,

Im after some feedback, I've got this unit in my R33 and it kicks ass. However I found it sounds it a million times better with MX off and Deft on, on the unit. With it off I get low signals being cut out such as vinyl crackle/noise from high quality cds and also loose some volume from the track. With it on the CD's seem so much louder and cleared, tons more trebble and bass :rofl:

Does anyone have a similar experience with this head unit?

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Ok I've just found "DEFT" aka Defeat puts bass/trebble to factory settings and turns MX compression OFF. Previously I had bass/trebble at some level (unsure of what) and I turned on DEFT for the first time and so much more punch and sound from the CD's.

If you're lacking sound capabilities with the CDA-9807 try turning on DEFTEAT

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turning on defeat turns all your settings off ... so that its pretty much pure cd music with no equaliser settings from what i know ... personally i never like to mess around with the settings ... apart from the sub control ... MX is a waste of time ... just another eq setting ... just a marketing thing i think ...

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yeah, i found that with defeat on the clarity is hugely improved. Just gotta balance the output sound by adjusting the gain controls on the speakers and that is pretty much how i do the eq one mine. Previously spent hours doing the whole eq thing and while it made everything sound pretty fancy, overall it sounded a lot more artificial.

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Yeah I've left mine with defeat on and no other eq settings or MX it sounds fantastic. Just the sub level at +10 and all the amps cranked to full. It's great

One of the best sounding head units ive heard

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Guest SXY.033
Yeah I've left mine with defeat on and no other eq settings or MX it sounds fantastic. Just the sub level at +10 and all the amps cranked to full. It's great

One of the best sounding head units ive heard

Yeah i have the 7893 - and turn the MX expander off and like others prefer to tune it myself.

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  • 2 weeks later...

I've got the 9807 and like most of you I don't use the MX either, and my defeat is on too. I have the sub set to +10 as well, and it sounds sweet just like that.

I had a Sony before this unit, and used to listen in Loud mode most of the time, and figured I'd end up doing the same when I got the Alpine put in, but I've noticed that I don't need it on (due to more internal power and 4V mains output to my amp, maybe?), and I agree it sounds kinda artificial and "forced" when you put the MX on - even when listening at low volumes, which is when you're most likely to use any kind of Loudness control.

Nick T.

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  • 2 weeks later...

The MX button is only good when your listening to radio. If you turn your MX on when a good song goes on the radio, the bass that is lacking in a lot of Fm radio signals are kinda put back. Try it next time. But ye, with cd's or mp3's and so on, i never turn it on because the clariety drops and my alpine sounds like a sony headunit hehe :D

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  • 3 weeks later...

I'm picking up a CDA-9815 head unit on Thursday so I'll be sure to set it up like you guys have suggested :D

I'm trying to decided if I should bother getting a basic 2ch amp (Alpine MRP-T220 ?) to run the front 6" (SPR-175A splits) or will the CDA-9815 be good enough? I'm not after big bass, but a little bit would be nice. Not interested in subs, too much weight.

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I wouldnt get an amp. I had Kenwood 7x10 HQ's running off mine and they sounded great I couldnt even turn the headunit right up.

Now I use the headunit with the standard GTR Speakers which also works well. Not quite as good as the 7x10's but these GTR speakers are older now I guess

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amp the fronts for sure. this is a definate, it will sound great. then when youve done that amp the rears too, get some good 6" coax alpines and amp them aswell

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Thanks for the feed back fellas! Well here's what I've settled on...

Head unit - Alpine CDA-9815 (got this for $800 RRP-$999)

Front - Rockford Fosgate 6" splits (not yet sure which model - but quality ones)

Rear - Rockford Fosgate HE RFP4806 6 3/4" 8ohm subs (30-150WRMS power range)

Amp - Lightening Audio 50WRMS x 4ch

Should be a bit better than the dead stock system I have now. Won't add much extra weight either... which is important for "full street trim" legal drag racing :D

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