DIYSG Titan-615LX Build Thread - Page 5 - AVS Forum | Home Theater Discussions And Reviews
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post #121 of 142 Unread 03-12-2017, 06:20 PM
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Yeah, I'm not honestly pushing the big dollar amps too hard, but you don't want to end up with something you regret.

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post #122 of 142 Unread 03-12-2017, 06:35 PM
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Originally Posted by 18Hurts View Post
Carvin has a 4 channel Class D with DSP, I think it runs around $579 for the rig.
I'm running the sans-DSP Carvin 4 channel for my little LCR setup, and I love it.
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post #123 of 142 Unread 03-12-2017, 09:47 PM
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Originally Posted by VicTorious1 View Post
Does the NU4-6000 have problems with higher frequencies?
The NU4-6000 sounds and measures great in my room for my active setup. I use it for 80-600 and 600-20kHz. Full disclosure: I can't hear 20KHz, so who knows.
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post #124 of 142 Unread 03-13-2017, 05:59 AM
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Are these a good choice for LCR? 900 watts bridged

https://www.amazon.com/Crown-XLi1500.../dp/B00AR0A43G

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post #125 of 142 Unread 03-13-2017, 08:31 AM
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Originally Posted by VicTorious1 View Post
Does the NU4-6000 have problems with higher frequencies?
@MKtheater is using them and has spoken very highly of them.
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post #126 of 142 Unread 03-13-2017, 12:03 PM
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@MKtheater is using them and has spoken very highly of them.
I met MK yesterday for the first time to buy a crap-ton of subs from him. Great guy! We talked about his use of NU4-6000's for his mains and under his use, it sounded like they worked great. I think the key is that if you are using an inuke with very efficient speakers, you may be using like 50 watts or so which is way below where those amps start to get messy with distortion, etc. I thought that was a great point.
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post #127 of 142 Unread 03-13-2017, 01:12 PM
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Originally Posted by dtsdig View Post
I met MK yesterday for the first time to buy a crap-ton of subs from him. Great guy! We talked about his use of NU4-6000's for his mains and under his use, it sounded like they worked great. I think the key is that if you are using an inuke with very efficient speakers, you may be using like 50 watts or so which is way below where those amps start to get messy with distortion, etc. I thought that was a great point.
Him having them is actually why I mentioned it. I didn't know about the reason why he's able to use them. Nice.
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post #128 of 142 Unread 03-13-2017, 01:20 PM
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Originally Posted by dtsdig View Post
I met MK yesterday for the first time to buy a crap-ton of subs from him. Great guy! We talked about his use of NU4-6000's for his mains and under his use, it sounded like they worked great. I think the key is that if you are using an inuke with very efficient speakers, you may be using like 50 watts or so which is way below where those amps start to get messy with distortion, etc. I thought that was a great point.
Who says they get "messy with distortion"? The 20dB difference between an 85dB average and a 105dB peak requires 100 times the power. So if your speakers are using more than a few watts on average then you are almost certainly running into problems reproducing the peaks. I suspect that the clipping in less powerful amps and the compression distortion in speakers is far more common and audible than any measurable distortion in the inuke series when they are not clipping. The limiter in the dsp versions also can be set to prevent clipping entirely.
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post #129 of 142 Unread 03-13-2017, 01:27 PM
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Originally Posted by gworrel View Post
Who says they get "messy with distortion"? The 20dB difference between an 85dB average and a 105dB peak requires 100 times the power. So if your speakers are using more than a few watts on average then you are almost certainly running into problems reproducing the peaks. I suspect that the clipping in less powerful amps and the compression distortion in speakers is far more common and audible than any measurable distortion in the inuke series when they are not clipping. The limiter in the dsp versions also can be set to prevent clipping entirely.
I agree with you! My comment was in regard to some of the observations made by Notnyt during his testing of the inukes. On a scope, distortion and other issues are apparent when really pushing the amp. In reality, it may not be of any audible consequence for most users. I was simply saying that if only using a few watts from an amp like this, I imagine they will sound just fine as many who use them have figured out. I've only used my NU4-6000 for sub duty so I can't comment on how it would sound driving my 1099's for example.
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post #130 of 142 Unread 03-13-2017, 02:03 PM
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Originally Posted by dtsdig View Post
I agree with you! My comment was in regard to some of the observations made by Notnyt during his testing of the inukes. On a scope, distortion and other issues are apparent when really pushing the amp. In reality, it may not be of any audible consequence for most users. I was simply saying that if only using a few watts from an amp like this, I imagine they will sound just fine as many who use them have figured out. I've only used my NU4-6000 for sub duty so I can't comment on how it would sound driving my 1099's for example.
I would go even further. I would be willing to bet that it is of no audible consequence for any user. It is all too easy to fall into the audiophile trap of thinking that different amps sound different. What is ironic is that it drives people to using less powerful amps which are far more likely to suffer audible distortion because they are more likely to be over-driven.
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post #131 of 142 Unread 03-13-2017, 03:01 PM
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Originally Posted by gworrel View Post
I would go even further. I would be willing to bet that it is of no audible consequence for any user. It is all too easy to fall into the audiophile trap of thinking that different amps sound different. What is ironic is that it drives people to using less powerful amps which are far more likely to suffer audible distortion because they are more likely to be over-driven.
Spot on.

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post #132 of 142 Unread 03-13-2017, 05:33 PM
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I dunno about the nu4, but I put my 6000 on the 1899's to get a feel as I have been contemplating more power. First off, this did confirm that noise floor is unacceptable from the 6000 for mains. I left everything flat on the dsp. Now I don't have a mic because they are still out of stock, but to my ear I didn't notice enough difference with the inuke at 0 trim showing clip lights vs my b&k with trim at +7. That couple grand will be going elsewhere
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post #133 of 142 Unread 03-13-2017, 06:19 PM
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Originally Posted by gixerking View Post
I dunno about the nu4, but I put my 6000 on the 1899's to get a feel as I have been contemplating more power. First off, this did confirm that noise floor is unacceptable from the 6000 for mains. I left everything flat on the dsp. Now I don't have a mic because they are still out of stock, but to my ear I didn't notice enough difference with the inuke at 0 trim showing clip lights vs my b&k with trim at +7. That couple grand will be going elsewhere
Were you able to isolate the noise to the nu6000? Here is an article that talks about tracking down noise in a system: https://www.gcaudio.com/tips-tricks/system-noise/

Setting level controls properly can also make a difference in apparent noise: http://www.rane.com/note135.html

I don't understand your last couple of sentences. You substituted the inuke for your B&K and did not notice a difference? What difference did you think you might hear? What does the trim have to do with it? What were you thinking of spending a couple grand on? I'm just not sure what you are saying.
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post #134 of 142 Unread 03-13-2017, 07:35 PM
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Originally Posted by gworrel View Post
Were you able to isolate the noise to the nu6000? Here is an article that talks about tracking down noise in a system: https://www.gcaudio.com/tips-tricks/system-noise/

Setting level controls properly can also make a difference in apparent noise: http://www.rane.com/note135.html

I don't understand your last couple of sentences. You substituted the inuke for your B&K and did not notice a difference? What difference did you think you might hear? What does the trim have to do with it? What were you thinking of spending a couple grand on? I'm just not sure what you are saying.
I'll leave the noise floor stuff to those more knowledgeable to go into.


Trim is signal level from the receiver to the amp. I'm saying I will spend the couple grand on something else other than more power for my mains. New surrounds, new receiver, mini dsp, whatever I might get more use out of.
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post #135 of 142 Unread 03-15-2017, 11:04 AM
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I'm sure those are all great amps, but I shudder to think what they cost. If you have lots of money to throw around, why not.
I've owned the Emotiva XPA-3, and really, that's all you need. 200 continuous watts per channel for extremely efficient speakers. Just my 2 cents.
I thought that too in the other 615 build thread. But Matt pointed out that in "spirited listening sessions" one could be clipping the 100w amp. If one could clip at 100w, 200w gives only 3dB more headroom, so 400w seems a lot safer if one will listen at reference level and above.

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post #136 of 142 Unread 03-15-2017, 11:11 AM - Thread Starter
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Originally Posted by gixerking View Post
I'll leave the noise floor stuff to those more knowledgeable to go into.


Trim is signal level from the receiver to the amp. I'm saying I will spend the couple grand on something else other than more power for my mains. New surrounds, new receiver, mini dsp, whatever I might get more use out of.
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I thought that too in the other 615 build thread. But Matt pointed out that in "spirited listening sessions" one could be clipping the 100w amp. If one could clip at 100w, 200w gives only 3dB more headroom, so 400w seems a lot safer if one will listen at reference level and above.
I'm pretty sure that I experienced amp clipping when I was driving these off my avr with 7 channels driven and the volume above reference level. My AVR (Denon x4300h) can output 165 W at 6 ohms into two channels. Not sure how much that drops with additional channels driven. Alleviating the amp's load by adding an XPA3 into the mix made a difference with the test scenes that I ran. My room is on the smaller side, however, but I was easily able to exceed reference cleanly with the addition of the XPA3.
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post #137 of 142 Unread 03-20-2017, 08:52 AM
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Hey Vic did you ever start finishing your cabs?
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post #138 of 142 Unread 03-20-2017, 09:32 AM - Thread Starter
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Hey Vic did you ever start finishing your cabs?
Not yet. I've been researching various methods, but I'm waiting until it warms up because I'll need to finish them outside. I'm looking at either staining them or doing a vinyl wrap.
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post #139 of 142 Unread 03-20-2017, 04:17 PM
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Just read this thread, nice build! How are they sounding now?

Have you heard or owned any commercial pro cinema speakers e.g JBL 4722n or QSC SC-2150? Very curious how these would compare!
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post #140 of 142 Unread 03-20-2017, 05:47 PM - Thread Starter
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Just read this thread, nice build! How are they sounding now?

Have you heard or owned any commercial pro cinema speakers e.g JBL 4722n or QSC SC-2150? Very curious how these would compare!
I've heard both the 4722, 4722N and SC2150. I haven't, however, heard the 4722 with the upgraded tweeter that folks rave about. I hesitate to compare them as I haven't heard either in a side-by-side, head-to-hear comparison. I will say that these sound great. If I had the room, I likely would've pulled the trigger on the 4722 after I heard them, but my room didn't have the width. The SC-2150s are bass monsters especially if you can put them in a baffle wall. The Titans are a pleasure to listen to with music and movies. Clear highs/mids and more than ample midbass. I'd definitely recommend these if you're in the market.
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post #141 of 142 Unread 03-21-2017, 09:43 AM
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Hey @VicTorious1 just curious where you ended up mounting the crossover, any pics of that?


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post #142 of 142 Unread Today, 12:03 PM - Thread Starter
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I haven't decided how I'm going to mount them yet. I still have them sitting on top of the cabs. I might get one of the plastic see-through cases from Amazon or I might mount them internally. I'll update when I decide.
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