JTR Captivator - Page 139

Give me a call ratm --- I'll help you out.

PM me for my phone number.

If newbie and you stay around here long you'll figure out what those words mean in a hurry!

Thank you my good man. I will DEF do that once I pick up this beast.

Announcement of another GTG

http://www.avsforum.com/t/1460712/central-iowa-spring-audio-gtg-jtr-bamberg-seaton-salk-gr-research

I was in the same boat just a month ago ratm. Exactly the same situation that your in. I have the Passive JTR CAP and am running ep4000 and mic2200. Dont worry it wasn't as hard as I thought it would be and actually learned a lot in the process. I followed Archaea's CAP set up on a budget which is on page 92 of this thread and it took all of the guess work out. I bought everything as specified (30 feet of cable came in handy for ep4000 to sit in another room hence no fan mod!) and even had to do a bit of handy work to remove driver to check if wired for 8ohm which it was! If you follow the first post I made on this thread just a month or so ago I probably asked a lot of the questions you may have. Great advice given here. I ran the CAP without mic2200 for a while as I waited for it to be delivered and the results are truly spectacular! Im now running the 2200 HPF (see below) and can only be upside from here as at this stage I dont know what Im missing out on with the Parametric EQ disabled. Cant wait to see your feedback!



Too right. Ive just had a chance to play around with the Behringer Mic2200 and the CAP. I see what you mean Archaea I felt like I was fumbling around in the dark. Although I can now turn up the bass if needed but really not necessary. I need to get somebody who can show me how to do the Parametric EQ. I have seen and noted the advice regarding REW and at some stage will learn about this. Is it possible the Batman scene I watched the other night (chapter 17 beginning of nightclub fight scene) could have something to do with the quality of the movies actual recording? As Ive never heard even the slightest sign of struggle with anything else. The beginning of Attack of the Clones just after the opening text has an incredible bass scene which shakes the house literally and this appears to be much more demanding than the other scene I mention. How much improvement is derived from having the Parametric EQ done properly? Not questioning the benefit but I am loving the CAP without. I will run the HPF at port tune at the moment in any case (for me Ive got Port tune at 20Hz).

Interesting that you say that about the fan. I have been toying with the idea of putting it a nearby closet, or in another room all together. OR doing the fan mod (hopefully thats not too hard) and leaving it out. I like the fact that it is passive. Pretty much means my wife will never turn it on to use it, as she could give two craps about LFE. Dang, I am giddy with anticipation.

Archaea,

Your cheap set-up post was spot on my brother, spot on. Question though, what exactly does the Mic2200 do? (damn, feel like a noob)

Matt

It is used as a high pass filter.

Thanks SD!

Darren needs to post with his Captivator impressions, IMHO. ;-)

An HPF (high pass filter - AKA low cut filter) cuts out frequencies below the setting - in this case the ported sub's port tune (these frequencies below port tune on a ported sub are are largely distortion) but more importantly it reduces these frequencies where the driver is basically in free air and the cabinet is no longer providing support/resistance/protection against over excursion of the driver (In this case you can't really hurt the Captivator driver - it has a soft bottom design -- but over excursion below port tune can introduce port chuffing and distortion)

Prior to 2011 I didn't know what a HPF was. You'll pick up fast.

It's okay I guess....

come again?

^^^^^^^^ what he said

I was hoping to get rise out of nube.

I am very impressed with the Cap. The power of this thing is very impressive.

Picking up Cap tomorrow. Suuuuuuuper psyched!!

Congrats, ratm! Can't wait to hear your impressions.

Officially a JTR Captivator owner!!!! On my way with this beast and holy **** is it a BEAST. I provider impressions later tonight.

Holy Crap. Wow, where to begin. Ummm.

I'll start with a simple one. I am getting a CRAPLOAD of hum, that I never got with my Empire. Any ideas?

I had that and my cable was not properly grounded.

what was your solution?

i just used a cheater plug, which i know is not optimal, but it eliminated the hum. Now on to calibration

ratm, check what I told someone in another thread this took care of my problem with hum when I had Caps.

http://www.avsforum.com/t/1460792/dual-dayton-ho-18s-first-diy-project#post_23023687

Carp, does it matter that I am using DirecTv and not cable? If not, where would I put the inline cable thing? Before my directv box? Also, I have set it up to 80db at my listening position, but here's another oddity. When watching anything through my PS3 or my Directv, I get a full 3.1 (no surrounds as of yet), but when I switch it to the Apple TV2, I get no output to the Cap. I've tried shutting it off and turning it back on (ATV to no avail). Weird. I'd really like to play some music thru it, but cant seem to get any sound to it.

I wonder if the mic2200 is the cause?

Not sure if satellite could cause the hum or not. When the cap is humming unplug the coax cable that plugs into your directv box and see if the hum goes away. If it does then you could buy that product I linked and a short coax cable cord so you can connect it and then plug back into your box.

I need to pull this out as a sticky/resource on my forum, but I posted some solutions I've found with grounding originally on my own forum, and later posted it here on AVS.

In short, try grounding the receiver/preamp and then can use the grounding as intended. The issue is always one of floating and different grounds, so no single item causes the problem, only specific combinations. Of course none of these problems become audible until you connect a speaker, so we as speaker manufacturers are the ones who get to do the troubleshooting...

Thanks mark, I'll def give those a read. Having more of a head scratcher as to why I get no LFE witH regardless of the source, but PLENTY TV/movies

What surround mode is your AVR set to with the ATV and are your speakers set to small?

Almost certainly an issue with either the output setting of the Apple TV and/or the decoding mode on the receiver. Some have separate settings for stereo or can lock into "direct" mode which usually is L/R and no sub. Good luck with the menu exploring to find it!

Unplug the input from the pro amp and see if the cap sub still hums without any source, but the amp powered on. If not - then you know the hum is in the source (AVR, Bluray, TV etc -- most likely) if the sub hums without the source hooked up then the pro amp is at fault.

What AVR are you using? what crossover are your mains set to?