Cheap 6.5" drivers

[PeteMcK]

I came across these cheap 165mm drivers:
Sens: 87dB 1watt/ 1metre
Re: 6.9ohms
fs: 39Hz
Qms: 6.027
Qes: 0.466
Qts: 0.433
Vas: 20.9Lt
Sd 0.0133 Msq

Two in a ~60L box tuned to 33Hz seem to model pretty well in Unibox, giving an F3 of ~30Hz. Seems almost too good to be true, am I missing something?
(I doubt whether the specs are that accurate, but at $AU36, worth a go? I'm not expecting huge dBs)
cheers,
Pete McK

[vinylkid58]

Hi Pete,

I get similar results in WinISD, two drivers in a 60L vented box tuned to 35Hz gives F3 ~32Hz. Nice and flat down to about 40Hz.

Jeff

[PeteMcK]

thanks Jeff,

I went & bought them anyway :-)
For Aussies, these are Jaycar CW2135.
They've got the gross 'Response' logo on the dust cap, a bit of work with a black marker pen should fix that.

Now I'm off to Bunnings for some MDF...
the plan is to make something along the lines of the 'Poor Man's Strad' that's wide & thin, perhaps using ply so I can hang them on the wall???

I must check Andy Graddon's site to see if he's used these before.
Cheers,
Pete McK

[Andy G]

The Jaycar CW2135 is the 6.5" version of the 8" CW-2136 that I used in "The Juke"

They are a good bass driver with plenty of grunt.
I do find the mids to be a bit fuzzy, sort of lacking in detail compared to Vifa, Seas, etc

I am actually considering buying a few myself, if a guy I know wants a mid price HT set-up

As for the logo, covers easily with black spray, marker is a tad untidy !!!

[phreeky82]

I thought they'd be that driver as soon as I saw your first post and you were in sydney

I've used the 5" shielded 4ohm drivers (no longer available) and 8" 'high power woofer' too, both with results I'm very happy with. The 4" drivers also seem to play unbelievably low, I'd be curious to hear of anyones experience with those - one in a small bookshelf, ported, i can forsee giving excellent results. I'm looking at these for surround and centre channels.

As you say, the biggest drawback appears to be the response logo. I never got rid of it - I might try attacking with a black marker also however, as it's quite ugly.

[Andy G]

The old 8", 10" and 12" carbon fibre were reallynice

never did like that 5" woofer, and stay well clear of the 5" closed back thing, its a POS !!!


ps: the Response logo looks cool with the blue cabinets in "The Juke"

[phreeky82]

Hmm ok I like the 5"s (not the sealed-back midranges), gives a very similar sound to the others in the response range that I've heard and so matches up really well.

p.s. just did a search for "the juke"..........oh my And i thought my creations (ignore the ghetto sub in the pic) were distracting to the eye: http://www.clubpoint.net/bluebird/stereo/Img_4110cr.jpg

[PeteMcK]

Andy,
I'll be crossing over at ~ 150Hz, so mids shouldn't be a prob.

Phreeky,
Altronics has a 5" that models pretty well too, C3084.
(Altronics web page specs are usually different from their downloadable spec sheet though...)
I went for the 6.5" to get max bass.

Total spent so far ~ $210 (first time I've actually bought new MDF for a speaker project!!!) Should come in at <$250 total I hope.

Thanks for the responses guys.
Cheers,
Pete McK

[PeteMcK]

nice paint job phreeky :-)

[Andy G]

Originally posted by PeteMcK
nice paint job phreeky :-)

I'll double on that ! cool look!!! :-)