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Phasing an Altec Valencia HF Horn

71.0.111.201
Posted on October 25, 2009 at 10:18:50
les winter
Audiophile

Posts: 225
Location: Northern NJ
Joined: May 29, 2004
 I've converted my Altec Valencia's to an active crossover arrangement.

I'm using a Marchand 24 db/oct Linkwitz crossover. I tried 800 hz. Terrible. Then I went to 1200 hz. Very good.

Now, do the HF horns need to be wired in in phase or opposite phase to the woofers? They sound pretty good either way on first listen.

any input appreciated.

thanks

RE: Phasing an Altec Valencia HF Horn, posted on October 29, 2009 at 13:19:31
edorts
 I have Altec 416A, 806A and N800G components in cabinets built from Altec Valencia plans but 6" taller.

Are these different components than Altec delivered in factory Valencias?
RE: Phasing an Altec Valencia HF Horn, posted on October 30, 2009 at 03:25:41
les winter
Audiophile

Posts: 225
Location: Northern NJ
Joined: May 29, 2004
 They are the same. What's your cabinet like?
thanks
Les

RE: Phasing an Altec Valencia HF Horn, posted on October 26, 2009 at 10:47:13
merdy
Audiophile

Posts: 281
Joined: July 25, 2001
 hi with both low pass and high pass at the same slopes on an active system should be in phase ,sometimes amps of different calibre can also alter the amp output but you will hear it at 800 to 1200 hz easily
the valencias do use the smaller horn and it is crossed at 1200hz you can also try simple 12 db slopes at 1200 hz as altec intended
i use a marchand crossover as well and could not live without it ,the usni makes altec drivers shine shine shine

RE: Phasing an Altec Valencia HF Horn, posted on October 26, 2009 at 10:51:27
les winter
Audiophile

Posts: 225
Location: Northern NJ
Joined: May 29, 2004
 Thanks for the reply. What is UNSI?

Did you note any differences using an active x-over with 12 db slope?

thanks again.
Les

RE: Phasing an Altec Valencia HF Horn, posted on October 26, 2009 at 14:06:21
merdy
Audiophile

Posts: 281
Joined: July 25, 2001
 ahh typo biggie !!! that will teach me to have a cigratte in one hand ,phone in my ear, and typing with one finger,
well i biamped my magnificents with 12 db and the drivers seemed to be a bit more lively,
for my bigger rig i felt the speaker as a whole and not the sound of seperate drivers ,when using 12 db slopes at 500 hz even though i have 300 hz horns ,i do use the xm26 tube unit(unsi)
what amps are you using?

RE: Phasing an Altec Valencia HF Horn, posted on October 26, 2009 at 15:05:32
les winter
Audiophile

Posts: 225
Location: Northern NJ
Joined: May 29, 2004
 curcio dynaco kt88's with oil filled filter caps on top, adcom 545 on the bottom.

RE: Phasing an Altec Valencia HF Horn, posted on October 27, 2009 at 08:25:51
merdy
Audiophile

Posts: 281
Joined: July 25, 2001
 thats a lot of power now that you have bandwith seperated, i would use a smaller amp on the horn, triode perhaps,my tried and trusty dynaco st 35 really shines on the horns although i use dht now,plus the voice coils can get easily slapped around with some amp pop etc, and use your kt 88 on the woofer , besides full tube sound you can make a passive subs and drive it with the adcom or get another crossover
nothing like a full blown active system to sing and play air guitar active altecs rock

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