Small but perfectly formed JBL home cinema

[Brainstorm]

Just found this brief pdf file description on the CP-X430 that gives details like screen size distances, input signals, and 16:9 mode and more
http://hitachi-homeelectronics.us/su...es_ds_0205.pdf

2,500 ANSI lumens
• Native XGA resolution
• 9.9 lbs
• 2 RGB inputs and RGB
output/DVI inputs
• Manual zoom/manual focus
• Contrast ratio 350:1
• HDTV theater ready
• FCC class B
• Component/composite/S-video
• Vertical & horizontal keystone correction
• “My screen” (user programmable start-up screen)
• Reverse image function for ceiling mount
• Remote control with laser pointer
• Whisper mode 36dB
• 16:9 mode
• Digital zoom/freeze function
• Switchable IR receiver for
remote controller
• Gamma correction
• Supplied with soft case
• Kensington security slot
• Picture in picture

Model name CP-X430 series
Liquid crystal panel structure 0.9” polysilicon active-matrix TFT x 3
Number of pixels 786, 432 pixels (H 1,024 x V 768)
Resolution Video 540 TV lines
RGB 1024 dots x 768 lines
Colors 16.7 million colors
Aspect ratio Native 4:3/16:9 compatible
Lens Manual zoom 1:1.3 (F1.74 - 2.08)
Throw ratio (distance:width) 1.94 ~ 2.57 : 1
Lamp 250W UHB
Expected lamp life Approx. 2,000 hours
Brightness 2,500 ANSI lumens (2,000 ANSI lumens in whisper mode)
Contrast ratio 350 : 1
Speakers 1W x 2
Power supply AC100-120V/AC220-240V 50/60Hz
Power consumption 410W
Operating temperature 0°~ 35°C (32° ~ 95° F)
Input signals RGB VGA, SVGA, XGA, SXGA (COMPRESSED), MAC13”, MAC16”
Composite video NTSC, NTSC4.43, PAL, PAL-M, PAL-N, SECAM, PAL60, S-video
Component video 480i, 575i, 480p, 1,080i, 720p
Acoustic noise level 40dB (36dB in whisper mode)
H sync 15kHz ~ 80kHz
V sync 50Hz ~ 120Hz
Vertical keystone correction Digital keystone +/- 15°
Horizontal keystone correction Digital keystone +/- 5°
Approvals UL, C-UL, FCC Class-B, CE, TUV
RGB input Digital RGB DVI x 1
Analog RGB 15-pin D-sub connector x 2
Audio Stereo mini jack x 2
Audio output Stereo mini jack x 1
Video input S-video Mini DIN 4-pin connector x 1
Composite video RCA jack x 1
Component video RCA jack x 3
Audio RCA jack x 2 (L/R)
Control terminals 15-pin D-sub connector x 1
USB connector (USB mouse) x 1
Compatible controls PS/2, ADB, Serial
RS-232C (Serial)
Dimensions 14.2” x 4.2” x 10.1” (W x H x D)
Weight 9.9 lbs.
Supplied accessories Remote control with laser pointer, PS/2 mouse
cable, batteries (AA), power cord, RCA
component cable, RGB cable, multiple language operator/
safety manual, soft case
Lamp CPX430LAMP (Part #: DT00471)

Screen Size 4.3 Throw distance
Diagonal* Width* Min* Max*
40 32 62 82
60 48 94 123
80 64 127 164
100 80 160 205
120 96 192 246
150 120 241 308
200 160 323 411

[Brainstorm]

Type of screen? Now I sure don’t have hundreds for screen so I’d have to look around at what is on hand and see if it can’t be put to some good use. Fabrics are not all that good it needs to have some degree of refractive gloss or neutral matt look

Perforated is important to allow the sound to pass though.

I wonder if there’s any second hand screens going or maybe new ones at revolutionary low price.

Mounting it would have to be closer to the upper middle rear ceiling.

One thing is clear thou I won’t be using this all the time, due to bulb life 2,000 hours. I’d use it for new films or the odd one now and then, but use the SONY CRT for most regular viewing, so I’d have to make screen that can be removed kinder like pull down screen but perforated.

At most its 83 days running time at full, halve that and it should give around 1 year at best. That would mean around few films once every week average is 2 hours, hmm, yeah about a 1years worth out of the bulb damn costly.

Average domestic light-bulbs don’t even cost no more than £1.00 pound today and some might last just over 1 year. Sigh, the price you have to pay for life’s little luxuries these days sigh.

[Brainstorm]

Been looking at alternatives like pre-made video projection screens but as of yet can’t find a realistic price with a perforated screen. Costs can run as high as near to £grand.

http://www.drhscreens.co.uk/
http://www.smxscreen.com/

I’ll have to visit fabric shop around May and see what types of white fabric that can be used as projection screen. Even some fabrics can cost quite a bit per square metre

[Brainstorm]

Just got off the phone with a friendly chap where I was asking for perforated screens. He said we don’t stock them and replayed some company’s that do supply perforated screens micro screens due to the different size in perforations VS distance.

I knew instantly what he meant about some customers complaining about seeing the regular cinema screens due to the size in perforations and VS distance. In a cinema front seats are at least 20 feet or more away from the audience.

In the home you’re considerably a lot closer due to the room size length.

I wanted to look at my options for screen as I was thinking about a bed sheet not that there is anything wrong with the idea, it just won’t have the refractive surface.

So I thought how about taking a hobby drill as this is for model making and drill bits are very tiny for precession model drilling. Now if I can look at sample micro perforated screen or use it as (template) placed over a none perforated screen I could drill out the parts of the screen I need.

For example if screen speaker is placed LCR at given distance width and height of speaker as well, all that I need to do is drill the holes for the width and height and yes it would take days if not weeks to do this.

Also due to drilling small perforated holes and only in three locations might, stick out like a soar thumb with kinder grey tone look, maybe?

Anyway the chap is sending me two samples to look at so I can evaluate and make decision to go with non-perforated and modify it for less of the cost or track down a suppler for perforated screens and pay a bit more.

[Brainstorm]

Received some screen samples to compare with and I have to say the micro is more best suited.

I placed the normal perforated screen and micro screen at distance where JBL speakers, I could instantly see the differences between the two the normal stood out over 8 feet away and that’s too near. About 15 feet away it starts becoming less noticeable or transparent, so around 20 feet away your hardly going to notice it.

The micro screen was spot on at 8 feet away the holes look like (0.5 or less mm) the normal one looks like 0.7 or just a bit larger. The holes on the normal are also spaced out and guess that is what gives it away in small room.

If I had to use non-perforated screen and use a micro as template to drill micro holes with hobby drill it would take weeks.

I like the smell of the plastic between the three types.

Also rubbing my fingers or sliding them along the surface produces different frequencies.

I’ll have to try later on some sound tests with the normal over micro while hanging it in front of the centre channel and pass a few sine wave tones or pink noise see what the db ratio sound loss is.

Also been phoning around at another supplier that the chap suggested try Screenline which is an Italian make.

I’m waiting some figures on screen cost just the material I don’t want no manual/automatic screen retraction system just the screen.

[Brainstorm]

Only £100, 00 pounds outstanding should have this around May.

Base platform contraction around late May
Baffle wall construction around June

Screen material pending on supplier that can provide an affordable rate for perforated screen/micro. If the push comes to the shove I’ll explore plan C.

[Brainstorm]

My close friend just dropped his ole Panasonic TX-32PK1 widescreen (CRT) along with his young son and very youngest daughter. She was shy about stocking Sooty who ran for cover as he is an extremely shy cat.

The ole Panasonic has slighter clearer edge over the SONY CRT 4:3 that he dropped off on Boxing day last year.

Only problem now is recollecting the sound LCR matching JBL control 5 as they are now in new position that didn’t take long to find some magazines and flipping the other loudspeakers AWIA on their sides so I can the height near to that of the matching centre channel!

I can not wait until I start knocking up the stage platform around late May the very least early June.

I’m presently testing out image with the new original STAR TREK feature films and I trilled to bits with STAR TREK the motion picture in its original (1979) six-track Dolby stereo form and not that abomination director’s edition, if anyone cares to really listen you know what I’m talking about.


I’ll give it very thorough and detailed examination with A B and C sound comparison in the JBL movie sound thread later on.

The SONY CRT is now placed in the bedroom so Sooty, and watch DVD at night time.





Only one last item to get and that’s the LCD video projector which will be around May.

One other thing, the Panasonic is placed fairly close to the diy JBL 4645 and I’m surprised the it didn’t go (total discolour).

I also need the remote that will be dropped off later.

[Brainstorm]

Just placed another payment down on the Hitachi LCD only £90 pounds left now should be able to get in another 12 ½ days. I’d need to get a sodden long S-video lead for it a damn long one too.

[Brainstorm]

And that’s that more or less up to date.

[RoadRunner6]

Great chap! Be sure and keep us up to date.

[pixelthis]

I 've seen Mexican soap operas that were less involved.
Ever heard of the K.I.S.S principle?
(Keep It Simple Stupid).
You need to throw out about half of that stuff, especially all of those sat speakers.
You are going to get freq cancelations, standing waves, all kind of good stuff.
Or maybe you could have a friend come over and taser you, that might help.
BTW I got a smaller JBL sub for fifty bucks off of a clearance table at Sears once,
exelent sub, but yours is WAYYY too big for that room, for that matter its too big for the
average soccer field, and being unsheilded its eventually going to destroy most of your gear, it needs to go, unless you want to degauss your CRT every half hour or so.
Otherwise, doing great.

[GMichael]

Wow! It was fun seeing your HT system grow in front of my eyes.
How does it sound to you?

[RoadRunner6]

I 've seen Mexican soap operas that were less involved.

They broadcast Mexican soap operas in Alabama?

[audio amateur]

This is just a bit

Pix, nicely said

[Kevio]

You go dude. With respect to audio performance, there's no such things as a sub too big. Your sub is more than you need for that room but you set it to the right level and it will sound just as good if not better than a smaller sub.

I'd not be to concerned with shielding (magnetic) issues. Your CRT probably has a degauss coil built in that will take care of that every time you fire it up. The new LCD you're getting is unaffected by the magnets in your speakers.

[pixelthis]

They broadcast Mexican soap operas in Alabama?

Life in Alabama is a mexican soap opera

[pixelthis]

This is just a bit

Pix, nicely said

The inquistion was "just a bit".
This is insane.
Also proof positive you don't have a woman in your life.
I don't either, but I don't advertise it.

[RoadRunner6]

Hey Pix, what channel is that? Gracias.

[Brainstorm]

You go dude. With respect to audio performance, there's no such things as a sub too big. Your sub is more than you need for that room but you set it to the right level and it will sound just as good if not better than a smaller sub.

I'd not be to concerned with shielding (magnetic) issues. Your CRT probably has a degauss coil built in that will take care of that every time you fire it up. The new LCD you're getting is unaffected by the magnets in your speakers.

Well it’s just barely within discolouring if I shift the JBL forwards it plays havoc. I know its really bad practice to place it that near. However a Toshiba 20 inch that now sits in the bedroom, not in use only the SONY is in use. The Toshiba seemed immune to the sub even when placed directly on top of the sub while sub lay sideways on the floor.

Strange huh.

The video projector I know will be unaffiliated by the magnetic pull over a CRT.

Not long now till I get and its not going to change my life nor do I want greater respect its just a video projector.

Since I had the new widescreen and its not what I’d call a real widescreen the picture shape/size is all wrong. Its more suited for W/S not scope aspect ratio. Plus the screen is over-scanned slightly.

I was thinking of opening the back up to peer inside for a few possible (VR) variable resistors for vertical and horizontal to see if I can bring the sides in bit as there is a considerable loss on the left side and mild loss on the right.

This is common with widescreen CRT/LCD/Plasma screens I haven’t seen one that displays the image without any loss. Not sure about the LCD video projector if there is going to be loss on the sides.

My last SONY CRT monitor was good. I made a tweak of the vertical and horizontal has it had (VR) inside the turn out was slightly wider image even thou it was 4:3 aspect ratio, now then.

The Toshiba hasn’t got any VR nor does the present SONY have any VR as that over scans slightly. I’m guess the Panasonic won’t have any VR as its all microprocessor chips today.

The basic picture to aspect ratio mode is childish I mean silly who ever invented needs to be shot. You can adjust vertical by shifting the image up and down, oh, wow! You can’t make any real differences to the change in V/H.

My 14 inch computer monitor displays a wider image of W/S and scope film/DVD what is the deal with this???

[Brainstorm]

The inquistion was "just a bit".
This is insane.
Also proof positive you don't have a woman in your life.
I don't either, but I don't advertise it.

Well you look like pretty boy, hmm, yes I fancy you a lot. Do you want some money to buy an ice-cream?

No, I’m single and loving it, because I don’t have hassles with talk-back or any lip, I go to sleep as and when I god damn feel like it. I say bugger the sun I’m not rising when it rises I get up when I’m god damn good and ready.

I eat when I choice I take a bath when I chose I go to the bog when I chose I brush my teeth each day I sit at my computer and wonder? WTF am I doing sharing with the world to a bunch of strangers whom I’ve never met face-to-face?

If this was anywhere else like the street I wouldn’t even bother sharing.

So to answer your question again, I’m straight and no I’m not gay so step back will you please.

[Brainstorm]

Great chap! Be sure and keep us up to date.

Well I’ll pop on by when any major I mean minor changes in rooms development.

Sooner I get into late May I can put a little money to one side for building materials to knock up the base platform that will extend over the front above the CRT Panasonic. God knows how I’m going to get all this knocked up. I have the plan in my head and down on paper so its case of doing it! Making it work.

That will be one part of the phase. The next phase is vertical baffle wall and that’s going to be challenge to size up and get it done right as the slightest miscalculation and I’d have to start over again. So I’d have to take it a few steps at time and not rush it.

The wall will be covered in fabric as to the type I’m not sure as yet I have few ideas on the type and I’ll look at the fabric shop down the road for possible affordable types that will work for the needs.

Cost I’d expect it to be done for £100 pounds or less.

[RoadRunner6]

Good stuff Brainstorm, keep up the project. We like the photos. Don't pay any attention to Pixelthis, he's an alien from the planet Alabama.

Hello to Her Majesty if you have her over for tea!

[Brainstorm]

Wow! It was fun seeing your HT system grow in front of my eyes.
How does it sound to you?

From the front LCR surrounds or overall?

LCR is good for wide listening at the back slight off the back wall by 45 inches. I could shift the sofa forwards a few feet.

Clarity of centre (DME) dialogue music effects is clear and understood over some of the left/right competition. The DCX2496 can ether be used with a bit of audio limiting to tame the levels while playing at modest loudness of near 90dbc LCR.

I use a bit of sub bass extension off the Eltax A-12R to extended LCRS

The surrounds all six for sidewall surrounds does the trick like its done in the cinema your not really drawn to single speaker rather than the whole. It took a bit of figuring and the key is spacing them out.

The back surrounds work fine and was only listening to Star Trek V (1989) a few days ago the new originals on DVD the hissing of the turbo doors as Kirk and others exit the bridge is heard directly behind as they walk off-screen.

The arrays of x4 surrounds for centre back eliminates the hole in the bucket effect. Two doesn’t cut four yes.

The timber matching once EQ with hours of testing up and down here and there gets near spot on smooth response with Terminator 3 (2002) as the “hunter killer” comes out the lift and swoops over John Connor and Catherine Brewster with an eerie tone because its so smooth without sudden jumps in the highs too much and bass level on the surrounds and sneaked a little 40Hz out thou very rare as these are only quoted down to 70Hz.

LCR again is all played separately with each driver with its own amplifier though the DCX2496 crossover system.

Sub bass well if I had more I could eliminate the standing wave/null issues I might have two subs but there not matched so I have to find he best possible spot with less null and take it from there.

Lows pound the sofa with chest feeling depending on frequency. Deep lows give good depth and creditability on Star Trek the motion picture (1979) with Jerry Goldsmith score. Range can sneak down to below 20Hz on the JBL the Eltax can’t quite mange that well its good for 30Hz or about 25Hz.

Highs over the LCR now that’s tough one depending on age the sweep goes up to 20.000 thou I can just make out 16.000 with headphones when doing an auditory test and I haven’t done one in few years since my headphones are buggered up.

I need to get all the equipment located in the bedroom which is to one side of the living room and channel all the cables/loudspeakers around the room. I don’t like clutter. Plus its in the way and might be reflecting some sound waves off it. So when I can get a long enough drill bit as I need to go though at last 5 ½ inches.

Anyway that’s way ahead.

[Brainstorm]

Good stuff Brainstorm, keep up the project. We like the photos. Don't pay any attention to Pixelthis, he's an alien from the planet Alabama.

Hello to Her Majesty if you have her over for tea!

Well she popped down to Bournemouth, yesterday as matter of fact. She wanted to borrow so sugar. I said why sure you can have my last bag of sugar. Won’t you come in for cup of tea? She was pressed for time as you know. LOL kidding I’m kidding.

I’ve got my phaser set to kill the alien, just as long as its not one of those Denver peeping tom Aliens. LOL Here you, get away from my window! Zappp! LOL

Well point of fact its mostly archaic some of the equipment but that doesn’t say it doesn’t still work. Just as long as I can get the full six-track Dolby flavour out into the room or beyond by stretching the limits by extracting what is common now as centre back with basic Dolby pro-logic decoder matted with the main AVR or getting bit more action from LCR with left/centre right/centre which needs a few new decoders and amps and another DCX2496 which is miles away from happening now.

I need to pay attention and get the amps finalized with Alesis RA300 and bigger Behringer 2.4KW for the JBL sub, its all money and I’m not in real rush to show off to the world, if opportunity knocks I’ll go for it, but only if I have the money.

[pixelthis]

Well you look like pretty boy, hmm, yes I fancy you a lot. Do you want some money to buy an ice-cream?

No, I’m single and loving it, because I don’t have hassles with talk-back or any lip, I go to sleep as and when I god damn feel like it. I say bugger the sun I’m not rising when it rises I get up when I’m god damn good and ready.

I eat when I choice I take a bath when I chose I go to the bog when I chose I brush my teeth each day I sit at my computer and wonder? WTF am I doing sharing with the world to a bunch of strangers whom I’ve never met face-to-face?

If this was anywhere else like the street I wouldn’t even bother sharing.

So to answer your question again, I’m straight and no I’m not gay so step back will you please.

You Eurotrash types are so obtuse sometimes.
My point is that you cant have a woman in your life, because if you did when you started
this frankenstein project she would have left long ago.
Glad you like the life of a single, because with a flat that looks like a TV repair store blew up you will most certainly remain that way.
A great sounding system hardly helps if you're friends are afraid to enter your place on fear of electrocution.
AND why did you post if you werent willing to take a little constructive criticism?