CurtPalme.com Home Theater Forum

[CasetheCorvetteman]

I have a stored input of 2560x1600 at 60Hz by the way... So not sure why 2048x1536 at 72Hz is that hard to believe.

[CasetheCorvetteman]

Look here:

[huggy]

Case

I already have this 2048x1536 at 72Hz input stored on the 909

[redfox001]

Oh I do believe that but the noise was very low you did not hear it at all anymore. No wait the noise was so low you could here your girlfrien breath while she was asleep ten rooms across!

See this thread.
https://www.curtpalme.com/forum_archived/viewtopic.php@t=36685.html

[redfox001]

By the way that 17,4V you got from me. I run at 17.7V.

[gjaky]

[redfox001]

Ok to get things in perspective. I find that the higher voltage is louder at the start but after some time they become the same. Setting it to low makes my horizontal kick in more often.

But ok the 17,4V is something to try to. I just don't believe that this very high resolution is very quiet as the fans in the drawer start to spin at 72Hz very loud.

[CasetheCorvetteman]

[CasetheCorvetteman]

[CasetheCorvetteman]

[huggy]

Case

The Barco tech bulletin states to set that pot at around 17.3 so your spot on

[Francisco]

@huggy but that's on internal pattern of around 32kHz (that will be 31,5 as you only have a internal pattern to be around 32kHz)
contrast 50 and brightness 50. So if you take Casy values like internal pattern of 2048x1536 at 72Hz with a full white screen, you'll read different voltages when you set it to 32kHz C50 B50.

But I think to have it a little higher is not too bad actually as Casy and Redfox also experienced.
Soon I will give my 909 test chassis a try on UHD interlaced with HTPC and RGBHV

[CasetheCorvetteman]

Yeah it does say set it on 32kHz, but if i do, its done about 16.2v on a full white screen with 1920x1080 at 60Hz, there is banding and streaking and all kinds of garbage.

When i set it at 17.4v ( my hands arent steady enough over my head yet since being sick ) while it is showing a full white screen at 2048x1536 72Hz and fans roaring away, its set for the highest load it should see. Setting back to 32kHz and testing again shows about 18.1v with the standard test pattern.

[redfox001]

wrong thread.

[Curt Palme]

Back to MY thread and MY topic.

I bought 8 of these puppies... genuine JBL surrounds from a commercial theater that got upgraded. I bought 8 of these. 2 are damaged, the rest are fine. I'm actually amazed how CHEAP the speakers are in these. 8" woofer, stamped frame, although it says 'MADE IN USA' on the back, they look like $10 Parts Express cheapies. Still, there's a separate enclosure for the mids, and the dome tweets make me guess that these were made in the 90s. genuine JBl everything. Nice downwards slope to the cabinet, I'll mount them right up at the 8' mark.

Also, the dust cap popped right out with some duct tape!

$250 CDN for all 8. Now all my surrounds are matched! Whatcha think?

[Curt Palme]

Back to MY thread and MY topic.

I bought 8 of these puppies... genuine JBL surrounds from a commercial theater that got upgraded. I bought 8 of these. 2 are damaged, the rest are fine. I'm actually amazed how CHEAP the speakers are in these. 8" woofer, stamped frame, although it says 'MADE IN USA' on the back, they look like $10 Parts Express cheapies. Still, there's a separate enclosure for the mids, and the dome tweets make me guess that these were made in the 90s. genuine JBl everything. Nice downwards slope to the cabinet, I'll mount them right up at the 8' mark.

Also, the dust cap popped right out with some duct tape!

$250 CDN for all 8. Now all my surrounds are matched! Whatcha think?

[Zolzar]

Sweeeeeetttt!!!!!!! Amazing score Curt! Your HT is going to be amazing. I'm looking forward to seeing it progress.

[Curt Palme]

OK guys, question about surround speakers. I more or less always read that rear surrounds only process echo type sound, so you can pretty much use whatever speaker you want, nothing beefy. I assume that these JBLs realistically go down to 80Hz, maybe a bit less. On another forum, a member posted this:

It does matter, In True 5.1 all speakers should be full range and at least go down to 20hz as some sound tracks do go down that low even in the rear channels. Some receivers you can the speakers to Large + sub. this will send all low frequencies to all speakers plus to the sub. So the sub will get LFE and the other frequencies. then you set the cross over to what you want, so you can have the speakers crossed at say 40hz and the subs will get the LFE plus any thing up to 40hz that was also being sent to the other speakers. Some like this if they have capable speakers all around.

I'll be the first to admit that I don't keep up with the latest technology, which is why I sometimes post stupid questions here. So now I'm probably asking another stupid question: Have things changed since the early days of 5.1 surround, and is the above paragraph totally accurate, or can (as in literally every HT system I've seen) the surround speakers be smaller and not as critical as LCR?

[Curt Palme]

OK guys, question about surround speakers. I more or less always read that rear surrounds only process echo type sound, so you can pretty much use whatever speaker you want, nothing beefy. I assume that these JBLs realistically go down to 80Hz, maybe a bit less. On another forum, a member posted this:

It does matter, In True 5.1 all speakers should be full range and at least go down to 20hz as some sound tracks do go down that low even in the rear channels. Some receivers you can the speakers to Large + sub. this will send all low frequencies to all speakers plus to the sub. So the sub will get LFE and the other frequencies. then you set the cross over to what you want, so you can have the speakers crossed at say 40hz and the subs will get the LFE plus any thing up to 40hz that was also being sent to the other speakers. Some like this if they have capable speakers all around.

I'll be the first to admit that I don't keep up with the latest technology, which is why I sometimes post stupid questions here. So now I'm probably asking another stupid question: Have things changed since the early days of 5.1 surround, and is the above paragraph totally accurate, or can (as in literally every HT system I've seen) the surround speakers be smaller and not as critical as LCR?

[CasetheCorvetteman]

Youd be wanting to go at least 7.1 Curt, you've got enough speakers for it.

You want them all the same in terms of tweeter at the very least, if it was ProLogic it wouldn't matter.

[hansilili]

[Curt Palme]

[Curt Palme]