DIY 3 way main speaker with 15" drivers?? - Page 4 - AVS Forum
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post #91 of 862 Old 06-09-2008, 11:51 AM - Thread Starter
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use RCA to XLR cables out of my Pioneer Elite 91 into the DEQ, then digital from the DEQ to the DCX, then XLR to RCA cables out to my Emotiva LPA-1. I have no issues with voltage. The adaptor cables work just fine.

What is the DEQ for?

What XLR to RCA cables do you buy too?

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post #92 of 862 Old 06-09-2008, 12:25 PM
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Honestly does it really matter what cables he is using? Unless you somehow got some that don't work, they shouldn't have much difference. I have been using both of these products as well for testing mains for over a year now, even when listening to extremely high spl content (that almost no one here could even touch with their ordinary systems) I have not had any noise issues to mention. There seems to be far more noise in most recordings than my system can generate at full volume.
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post #93 of 862 Old 06-09-2008, 12:30 PM
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DEQ is... an EQ. I've been lazy and have had it on bypass for the couple of months that I have had it, but I initially got it to correct for crappy response in my room.

"Vintage" is good for wine, not for A/V equipment.

-Dan D.
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post #94 of 862 Old 06-09-2008, 12:43 PM - Thread Starter
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Honestly does it really matter what cables he is using? Unless you somehow got some that don't work, they shouldn't have much difference.

That should be true but Im tired of the constant problems I have between my AVRs and pro amps so I want to eliminate as many things as possible....although this isnt the place for the discussion.

Lets leave this thread to my speaker build with active crossovers.


Quote:


DEQ is... an EQ. I've been lazy and have had it on bypass for the couple of months that I have had it, but I initially got it to correct for crappy response in my room.

So the DCX will only handle the crossovers and I "may" want to consider another EQ or just use my AVRs EQ.

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post #95 of 862 Old 06-09-2008, 12:46 PM
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I noticed a bit of noise when using the DEQ2496. I used it as a pre/pro from my computer to my EP2500 to my Monitor Audio RS1's. In bypass with the amp gains on full, I could bearly hear noise, with the EQ engaged, there was a little hiss...but still less hiss than when I was using my old Sony receiver and NO EQ. At resonable gain settings, the hiss was next to inaudible.

YID DIY
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post #96 of 862 Old 06-09-2008, 12:50 PM
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...... nuke



The storm was gone, but dark clouds still hung around
The perfect setting for things to come......

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post #97 of 862 Old 06-09-2008, 12:55 PM
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...... nuke



The storm was gone, but dark clouds still hung around
The perfect setting for things to come......

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post #98 of 862 Old 06-09-2008, 01:13 PM - Thread Starter
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Quote:


You can make a special XLR to RCA output cable that
offers less drive and your home amps are happier, less hiss, better
gain structure.

Does anyone sell these?

It is not "open-minded" to reject knowledge - Bob Lee
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post #99 of 862 Old 06-09-2008, 01:15 PM
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The DCX does do some equalization. Depending on your specific speakers and your room as well as the obvious factor of you yourself, you may or may not want more EQ capabilities. The DEQ will do a lot more. I keep thinking about selling mine but I dunno. I know I could use it, but I have never bothered to put the time into it.

"Vintage" is good for wine, not for A/V equipment.

-Dan D.
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post #100 of 862 Old 06-09-2008, 01:55 PM
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...... nuke



The storm was gone, but dark clouds still hung around
The perfect setting for things to come......

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post #101 of 862 Old 06-09-2008, 01:58 PM - Thread Starter
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.... DIY ...


Yep!! but Im horrible with my soldering gun!!

It is not "open-minded" to reject knowledge - Bob Lee
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post #102 of 862 Old 06-09-2008, 02:09 PM
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Penn,

Not sure if this is what you are referring to but I picked up the below cable from A2Z Cable.

RCA / XLR (CanareĀ®) 6FT to XLR Male (Balanced)
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post #103 of 862 Old 06-09-2008, 02:19 PM - Thread Starter
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hey, cool! Earlier this afternoon, I was searching and found that site...I bought the same cables so I can compare them to my RCA to XLRs.

Of course what Thy is talking about are DIY cables that actually can decrease the dB level so that the high output from the DCX matches better with standard comericial amps with just RCA in.

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post #104 of 862 Old 06-09-2008, 02:49 PM
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Quote:
Originally Posted by thylantyr View Post

I don't follow the commercial cable market
.... DIY ...

But they have time aligned copper molecules, and directional shielding... You can't make that at home
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post #105 of 862 Old 06-09-2008, 02:51 PM
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I got my cables from buy.com; they had cheap ones.

"Vintage" is good for wine, not for A/V equipment.

-Dan D.
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post #106 of 862 Old 06-09-2008, 03:04 PM
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...... nuke



The storm was gone, but dark clouds still hung around
The perfect setting for things to come......

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post #107 of 862 Old 06-09-2008, 03:58 PM - Thread Starter
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So back to the speaker build.

I have decide for now that Im building a active crossover system

So to summarize my choices again.....

Tweeter

- NeoCd2.0M $126
- NeoPro5i $305

MidRange
- PHL 1120 - 159.50
- Audax PR170MO - $83.3
- 18sound 6ND410 - ??

Woofer
-Lambda TD12X - $250


Still looking for the 18sound costs, its a very high effeciency driver so the experts say to use the NeoPro5i with it.

For amps, I have on pre-order the XPA-3 from Emotiva (it actually has XLR connections) it will drive the TD12Xs and Im searching for a 7 channel amp for the other drivers. Lots of options because I believe I probably need 75W or less/ch for those drivers. I will also be buying the DCX2496....current receiver in the room is the Yahama V663 but that can be changed, need to find another new receiver with HD audio, 1080p, etc.

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post #108 of 862 Old 06-09-2008, 04:46 PM
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No need to skimp on power these drivers can handle it I am building some very similar speakers...2 Lambda TD12 midbass either the 18 sound or an 8" PHL 2520 and the Pro5i ribbon. I am powering each speaker with a Crown XTI 2000 the 12"ers will get 800watts and the mid-tweet will get 500-600watts. My 5.1 system gets almost 10000 watts. And get yourself a new pre/pro as you will not need the built in power with external amps i run the Integra 9.8 for now till a high end unit can match its features and I really like it.

Nate

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post #109 of 862 Old 06-09-2008, 04:47 PM
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Oh and John said the 18 sound driver was $135

Nate

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post #110 of 862 Old 06-09-2008, 04:51 PM - Thread Starter
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I might consider it.

I have lots of amps already for all my subs, I will see if it makes a difference and I might order some more QSC amps then.

You are building very similar or exactly the same? Do you have your box specs yet? Do you have a build thread?

You really think those tweeters and the midrange will ever use more then 100W to 200W?

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post #111 of 862 Old 06-09-2008, 04:54 PM - Thread Starter
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thanks for the price!!

-NeoPro5i $305
-18sound 6ND410 - 135
-Lambda TD12X - $250

total driver cost $690....not bad at all IMO ($2100 for three sets)

Edited Opps! I knew it was over $2K

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post #112 of 862 Old 06-09-2008, 05:02 PM
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I do not know if I will ever really need it but I want the system to have a ton of head room. I had started a sub build thread since I am building 2 monsters from John capable of 122+db. Just figuring out which drivers to use in my 3 ways. I think I may order one of the 18 sound and the PHL and do some listening. John tells me the 18sound is a really good sounding speaker but I have also heard great things about the PHL. John suggests 3^ft for the 2-TD12 drivers so I will go with his suggestions.

Nate

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post #113 of 862 Old 06-09-2008, 05:04 PM
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$690 you are short in your add.

Nate

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post #114 of 862 Old 06-09-2008, 05:09 PM - Thread Starter
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John suggests 3^ft for the 2-TD12 drivers so I will go with his suggestions.

yeah, I saw the specs for it so this is what they require to obtain their spec'd freq.

My total box size is just under 3^ft, i need to find some good advice on building speaker boxes now.

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post #115 of 862 Old 06-09-2008, 05:10 PM - Thread Starter
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$690 you are short in your add.

Edited, I knew it was wrong, I had $2100 in a spreadsheet.

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post #116 of 862 Old 06-10-2008, 07:20 AM - Thread Starter
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I also looks like I need two DCX2496s? One has 3 analog inputs and 6 analog outputs. That will only handle my Main speakers. I will need one more for my Center Channel.

ALSO, Im going to need a bigger AV rack

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post #117 of 862 Old 06-10-2008, 09:02 AM
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Penngray,

In your size enclosures I'd say go with the single TD12X. Then the mid and you could get by with the smaller fountek ribbon in the 3way system if you wanted to save some money. The 6" midrange really opens up some options.

Nate,

I was thinking the same thing, to get one of the 6ND410's and the PHL 1120 here to do some listening and measurements. I'd stick with a 6" vs the 8" as the 6" will give you better off axis higher in frequency and really give you some more room to play with the xover point. If you're interested in buying one of each and want to send them up here i can make up a baffle on the CNC to mount each one, do some measurements and then send them back down to you with the baffles so you can do some listening tests too.

John

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post #118 of 862 Old 06-10-2008, 09:47 AM
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John J. You've got a PM.

YID DIY
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post #119 of 862 Old 06-10-2008, 10:52 AM - Thread Starter
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In your size enclosures I'd say go with the single TD12X. Then the mid and you could get by with the smaller fountek ribbon in the 3way system if you wanted to save some money. The 6" midrange really opens up some options.

I only want to save money but it all depends on the difference, I keep reading that both fountek ribbons are very nice tweeters but I also read that if I decide to get the 18sound 6ND410, then I should really consider the NeoPro 5i.

Quote:


If you're interested in buying one of each and want to send them up here i can make up a baffle on the CNC to mount each one, do some measurements and then send them back down to you with the baffles so you can do some listening tests too.

Im interested in buying, I will PM you.

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post #120 of 862 Old 06-10-2008, 10:55 AM
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Wow I was going to order a couple but I guess I do not have to plenty of people interested.

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