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OTOH - The case for horns... [message #16692] Mon, 12 July 2004 05:13 Go to next message
wunhuanglo is currently offline  wunhuanglo
Messages: 912
Registered: May 2009
Illuminati (2nd Degree)
Last night, as things are wont to happen, I kept playing more stuff louder and louder.

Things were really impressive (to me) toward the end of "Flim & The BBs -Big Notes", when they kind of pull out all the stops. The recorded levels go way up (the VU meters were peaking) and the bass was fantastic.

In fact I was really happy until I heard the Fostexes going "crinkle-crunch". 1mm of Xmax ain't what it used to be, even at 97 dB/W.

No damage done, but now I'm thinking there's an MTM arangement in my future.

Or arrays [message #16693 is a reply to message #16692] Mon, 12 July 2004 06:14 Go to previous messageGo to next message
Bill Fitzmaurice is currently offline  Bill Fitzmaurice
Messages: 335
Registered: May 2009
Grand Master
I watched 'Lord of the Rings/Return of the King' the other night and the SPL was peaking around 115dB. It sounded so good that the wife didn't even complain. This using 87 cent 4 inch drivers in my mains, and they have only a millimeter XMax. But I've got eight of them per side.

Re: Or arrays [message #16699 is a reply to message #16693] Mon, 12 July 2004 18:15 Go to previous messageGo to next message
wunhuanglo is currently offline  wunhuanglo
Messages: 912
Registered: May 2009
Illuminati (2nd Degree)
Are those the Part's Express close-out drivers? Seems like a lot of experimentation is going on with those.

I did have an alternative thought driving to work this morning - I'll see how a higher crossover point works - maybe take some of the load of the mids.

I'm afraid what might happen if I start contemplating arrays next...

Re: Or arrays [message #16707 is a reply to message #16699] Tue, 13 July 2004 06:49 Go to previous messageGo to next message
Bill Fitzmaurice is currently offline  Bill Fitzmaurice
Messages: 335
Registered: May 2009
Grand Master

Yes, total cost $60 for the pair including the lumber.

Well, see, that's not exactly what I meant.... [message #16712 is a reply to message #16707] Tue, 13 July 2004 11:03 Go to previous messageGo to next message
wunhuanglo is currently offline  wunhuanglo
Messages: 912
Registered: May 2009
Illuminati (2nd Degree)
I could multiply $0.87 by 8 and get something less than $10 ;)

You are in the professional ranks now, which means that you've acquired the ability to look at these things somewhat dispassionately.

On the other hand, I’m a life long obsessive-compulsive with tendencies toward audiophilia nervosa. Consequently, refocusing on arrays could lead to rather negative financial consequences.

For some, this is a hobby; for me, it's closer to a sickness.


But it should be... [message #16713 is a reply to message #16712] Tue, 13 July 2004 13:31 Go to previous messageGo to next message
Bill Fitzmaurice is currently offline  Bill Fitzmaurice
Messages: 335
Registered: May 2009
Grand Master
when you consider what a pair of arrays can do for a build price less than that of a single Fostex driver. The main advantage to DIY is how good a sound you can get for, in this case, peanuts. Plus: no complaint over size from the wife, which is worth at least ten times the speaker cost. BTW, I built these as my personal HT speakers to get something that could match the SPL of my newest horn-loaded sub. My prior speakers had been in place since 1993, the ones before than I built in 1978, so I'm not exactly prone to changing them a lot. On the other hand I seldom get more than three years at best from my electric bass rig before I tire of it and come up with something better.

Re: Or arrays [message #16727 is a reply to message #16693] Sun, 18 July 2004 05:42 Go to previous messageGo to next message
mollecon is currently offline  mollecon
Messages: 203
Registered: May 2009
Master
Quote:"It sounded so good that the wife didn't even complain."

Are you sure the poor woman still have her full hearing ability? After all, she did spent a lot of time with you... ;-)

Btw., where did you get those cheapo 4" drivers, and what brand are they? Same with the HF-units...

What amp are you using for surround?

Re: Or arrays [message #16728 is a reply to message #16727] Sun, 18 July 2004 10:06 Go to previous message
Bill Fitzmaurice is currently offline  Bill Fitzmaurice
Messages: 335
Registered: May 2009
Grand Master
Those drivers came from Parts Express, both the midwoofs and tweeters. I think they still have some. Check in their specials listing. They're shielded Chinese drivers; some batches have Pioneer logo. The tweeters are Onkyo auto sound, they have a post for coaxial mounting on an auto driver that you chop off. I used 8 midwoofs per side as I can run 4 ohms no problem, and the 38" TL length is fine for the Fc of 100 Hz. If you need 8 ohms you can go with 16 drivers, but with an Fs of 105Hz you still won't get below 80 Hz, so you'll need a sub in either case.

I use three homebuilt stereo amps for the mains and surrounds and a plate amp on my sub.



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