Help me choose an 8

[PV Audio 5,000+ posts]

Hey guys. I'm in the market for an 8 for my car, and there are two requirements: small space and sound quality. I've got 500w to throw at it, and and 1.1cubes max (ported). So far, I'm considering:

Dayton RS HF 8

ID8

Ascendant Assassin 8

Alpine Type R 10 (not an 8, but doesn't need a lot of room)

Out of these four, which would you pick for a moderate sized ported box or a small sealed, when the main goal is sq? I'm blending it with CDT HD-62Z components if that helps you guys. If you know of any other 8s or 10s with small requirements that cost under 125, let me know! //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

-Dave

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[Loud3 10+ year member]

My vote is split between the Assassin and the Dayton.

 

[skmfkr 5,000+ posts]

id say either the id8 or the dayton. ive seen the id8s before and they looked nice. but i havnt heard them. and i had a dayton titanic MKIII years ago that i loved

 

[PV Audio 5,000+ posts]

Since I know everyone likes pictures, I'll put up preliminary graphs of each to show you what we're looking at. Gimme a few to pull 'em all up.

 

[Loud3 10+ year member]

I read better with pictures.

Sometimes I don't read at all with pictures.

Hit or miss.

 

[PV Audio 5,000+ posts]

Okay, FR plots to go around //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Ported:

ID8

Dayton HF-8

Assassin 8

Type R 10

Sealed:

ID8

Dayton HF-8

Assassin 8

Few things to note: the type r has a slightly larger enclosure both ported and sealed which is merely due to the entire driver not fitting on the baffle used for the 8s. The ported enclosure is 1.18 gross for the 8s, for the R, it's 1.23. For sealed, the gross is .542 for the 8s, and not posted for the R, since I didn't even bother. There's no point in getting the 10 to just run it sealed. The only reason is because I can get it to fit in a small ported box, and a sealed ID8 or sealed Dayton will be cleaner anyway, so it's useless to me in a closed box.

Ported, however, the ID and the R look like absolute ***. I could bungee jump off the the ID and the R's FR plots. The F3 for the ID ported is 30.8, for the R 27.5 ( //content.invisioncic.com/y282845/emoticons/omg.gif.05aa02c3095d6ce9338996654eca0863.gif ) and for the dayton 48.5hz. The reason for the dayton's high roll-off frequency is if you can see, it has some gain above 0db to around 3, and therefore when it's a relative 3db down, it's only back to baseline. Its "true" f3 is actually about 29.5hz. Note, however, that the Dayton and Type-R are modeled as nearly Butterworth high-pass filters, while the Assassin is modeled as a Chebychev type 1 high-pass model. Why this happens, I'm not too sure, but the point is that I'm not too keen on its dip, espeically since it doesn't have the shelf-like roll-off of a Chebychev(1) filter.

The ID8, on the other hand, is almost exactly like a low order Chevychev type 2 high pass filter, and is possibly one of the most beautiful FR plots I've seen. With that said, it's the same reason why I don't believe it. Assuming there's some iffy parameters in the modeling, we'll ignore the FR plot above 100hz. If we do that for all of the alignments, you'll still see that the ID is ideally flat. Ideally flat in reality means something is wrong //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif. Any ideas as to what it should look like? I can't believe it would be that flat down, then have a nearly linear slope. Not possible.

Any ideas or other drivers to look into?

-Dave

 

[modskwod 10+ year member]

You could look into True Bass Solutions 8's maybe?

 

[PV Audio 5,000+ posts]

Never heard of them, nor can I find their website.

 

[PV Audio 5,000+ posts]

//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif I just ended up ordering both the ID8 and the Dayton. Either can be used in home audio if I don't choose it, while the Type R cannot.

 

[skmfkr 5,000+ posts]

lol good job. cx7heaven has 8 id8s sealed in his dakota. i forgot what amp he has

 

[Immacomputer 10+ year member]

Let me know how the ID8 and Dayton work out for you. I'm in a similar situation but I may have fallen upon a score on some True Bass 8s. If those don't make me happy, I'll be looking again.

 

[denim 5,000+ posts]

SoundSplinter Orphan8?

 

[PV Audio 5,000+ posts]

SoundSplinter Orphan8?

Already looked at those. Super low efficiency, high Fs, and only 6 ohm coils, and as I can't use two subs, I couldn't feed one properly with my amp. Thank you for the suggestion though //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[plugitin 5,000+ posts]

dd 1508...or ddt1508 (low profile magnet)

I just picked up the t1508 to throw in my regular cab toyota...

 

[quest51210 10+ year member]

Soundsplinter Rl-i8