The Silverado, a small d'Appolito loudspeaker

[SSassen]

I've just posted the full story behind the construction of the Silverado on my website, at the below url.

The Silverado, a small d'Appolito loudspeaker
http://www.hardwareanalysis.com/content/article/1815/

Best regards,

Sander Sassen
http://www.hardwareanalysis.com

[ShinOBIWAN]

Excellent work! And it features my fav low cost HF driver

I've been looking for something to build for my cousin and I think this could just be the ticket. Cheap and it looks like it performs well.

One question:

I know you recessed the tweet and surface mounted the mid/bass drivers but have you noticed any untoward effects by doing so? I realise of course that this was in your goals of time alignment.

From the frequency plots I can't see anything that would point to such a thing. Would be interested to hear your thought on the effects if any - afterall it would probably be a different matter if we were talking about diffraction on the tweeter.

Once again excellent write up and thanks for sharing what looks like a very promising design for what is essentially little money.

[SSassen]

Thanks ShinOBIWAN,

What can I say, I aim to please? And I can't stand sloppy workmanship so I try to live up to my own standards. As for the tweeter I haven't seen or heard anything during the measurements or when listening to the loudspeakers, the small baffle did worry me a bit, but it turned out not to be a problem at all. Off axis measurements are only slightly off from on-axis.

Regards,

Sander Sassen
http://www.hardwareanalysis.com

[jacco vermeulen]

Big name for a small loudspeaker, Chevy will sue you.

Craftmanship quality article, Sander.

[Russ White]

Nice looking speaker project!

What is the impedance of the speaker? 4ohm?

[SSassen]

Hi Russ,

Nominal 6-ohms, it never touches on 4-ohm really.

Best regards,

Sander Sassen
http://www.hardwareanalysis.com

[ficus]

I know I am reviving a rather dated thread, but I saw your design, and find it extremely interesting. However, I was wondering if you have some thought on whether it is possible to build the Silverado as a sealed speaker, if I were to increase its height into a floor-standing speaker, thereby increasing the volume of the case?

[sreten]

Originally Posted by ficus

I know I am reviving a rather dated thread, but I saw your design, and find it
extremely interesting. However, I was wondering if you have some thought
on whether it is possible to build the Silverado as a sealed speaker, if I were
to increase its height into a floor-standing speaker, thereby increasing the
volume of the case?

Hi,

I found the comment in the write up that a sealed version would need to
be twice as big hard to fathom. Modelling the driver all sealed versions
have very restricted bass, and a 20L sealed box for 2 doesn't work.

Per driver :
10L sealed is - 6dB at 90Hz and -9dB at 60Hz, Qbox = 0.36.
5L sealed is - 6dB at 87Hz and -9dB at 60Hz, Qbox = 0.41.
2.5L sealed is - 6dB at 87Hz and -10dB at 60Hz, Qbox = 0.5.
1.5L sealed is - 6dB at 87Hz and -11dB at 60Hz, Qbox = 0.6.
1L sealed is - 6dB at 93Hz and -12dB at 60Hz, Qbox = 0.7.

They need to be vented to produce any sembance of bass.
5L per driver needs to be tuned between 40Hz and 50Hz.

rgds, sreten.

http://www.humblehomemadehifi.com/do...k-III_copy.pdf

[bAD kLOPFER]

A nice looking speaker. Even it is no "real" D'Appolito as the xo-frequency is to high (or the distance of the low/midrange drivers is too wide).
But it seems to work well looking at the measurements.

One way to do a real D'Appolito would be using a fullrange driver as the tweeter with a lower xo-frequency (as we did in our "Sundan").