Official JTR speaker thread - Page 1197 - AVS Forum | Home Theater Discussions And Reviews
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post #35881 of 35893 Old 09-20-2016, 05:07 PM
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Are there any places that do detailed 3rd party testing of amps?
The numbers on the speaker power site don't really appear to be apples to apples or are labeled poorly. (Some are at 50hz, some not labeled, etc)
They also don't state what their numbers are higher up the spectrum, which would be interesting to see.

At least those numbers are still high enough to drive the 215's to reference in my room at the MLP (but just barely), but it would be nice to see an explanation from Dennis on this for clarity.
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post #35882 of 35893 Old 09-20-2016, 05:13 PM
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Quote:
Originally Posted by theblackangus View Post
Are there any places that do detailed 3rd party testing of amps?
The numbers on the speaker power site don't really appear to be apples to apples or are labeled poorly. (Some are at 50hz, some not labeled, etc)
They also don't state what their numbers are higher up the spectrum, which would be interesting to see.

At least those numbers are still high enough to drive the 215's to reference in my room at the MLP (but just barely), but it would be nice to see an explanation from Dennis on this for clarity.
A few guys on the forum do it.

Lukeandam (probably spelled that wrong) has posted links tonamos he has tested (including speaker power) and notnyt also has tested amps.
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post #35883 of 35893 Old 09-21-2016, 07:49 AM
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Quote:
Originally Posted by theblackangus View Post
Are there any places that do detailed 3rd party testing of amps?
The numbers on the speaker power site don't really appear to be apples to apples or are labeled poorly. (Some are at 50hz, some not labeled, etc)
They also don't state what their numbers are higher up the spectrum, which would be interesting to see.

At least those numbers are still high enough to drive the 215's to reference in my room at the MLP (but just barely), but it would be nice to see an explanation from Dennis on this for clarity.
Very close @raynist It's @lukeamdman and his amp testing thread is right here at DB: http://data-bass.ipbhost.com/index.p...plifier-tests/
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post #35884 of 35893 Old 09-21-2016, 03:45 PM
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Only two weeks until RMAF and lots to do.
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post #35885 of 35893 Old 09-21-2016, 04:19 PM
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Only two weeks until RMAF and lots to do.
I really wanted to go and I still may. See what happens. I just wish just once one of these shows were in NY Ctiy or even Florida. I could get 5 thousand flights to Florida for nothing.
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post #35886 of 35893 Old 09-21-2016, 05:38 PM
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Quote:
Originally Posted by beastaudio View Post
Very close @raynist It's @lukeamdman and his amp testing thread is right here at DB: http://data-bass.ipbhost.com/index.p...plifier-tests/
Thanks Beast!
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post #35887 of 35893 Old 09-21-2016, 06:29 PM
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Originally Posted by Reefdvr27 View Post
I really wanted to go and I still may. See what happens. I just wish just once one of these shows were in NY Ctiy or even Florida. I could get 5 thousand flights to Florida for nothing.
I don't know how big it will be but there is a show in NYC in November.

https://www.chestergroup.org/newyorkaudioshow/2016
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post #35888 of 35893 Old Yesterday, 07:54 AM
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Originally Posted by desertdome View Post
Note that the QSC PL380 long term does 980 watts @ 2 ohms, 1050 w @ 4 ohms, and 1100 w @ 8 ohms. This is consistent with an amp that is current limited - usually by the power supply. It takes a lot more current at low impedance for long term output. Bridging, which is done with most Class D amps, increases the voltage for more long term power at high impedance at the expense of having less long term power available for lower impedance.

Regarding the time, I thought they were self explanatory. All the amps tested show a time frame for short and medium term power. The final column is how much power they produce between the medium term power and thermal overload. Brian Oppeguard (SpeakerPower) helps explain it here:



Edit: Per Tommy with Digital Amp Company, the Cherry Ultra Monoblocks I own are rated at 400 watts @ 8 ohm, 750 watts at 4 ohm, but only 250 watts at 2 ohm. This is because they are current limited by design.
Interesting info Michael, I am anxious to see how the Motu with a 16Hz HP filter affects the ability to run the 215RT's up to and beyond reference without having woofer distress. I've been watching some movies at my usual -7 to -10db ref levels with no negative impact (in fact, it sounds great) but I can really hear/feel the speakers trying to play the ULF's without an HP filter. I'll be crossing the LCR's at 120Hz and the Motu will mix the LFE into the LCR's output.

Playing those frequencies is not my goal so I welcome more head room in general at the expense of anything below 16hz.

Opinions are not facts.

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post #35889 of 35893 Old Yesterday, 10:36 AM
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Originally Posted by Snowmanick View Post
I don't know how big it will be but there is a show in NYC in November.

https://www.chestergroup.org/newyorkaudioshow/2016
Yeah there are shows, but not like the big ones like CES or Cedia etc..I would love to goto Cedia in NYC for a weekend. NYC is a blast if you have the time. Anything you want is right there! I just hate $17 dollar Bacaradi and Cokes! Thanks for the link though.

Not that it indeed applies to this thread, but I just test drove a 2016 Lincoln MKX as we are ordering one and the Revel Stereo is excellent and the vehicle is not to shabby either. I was very impressed with it. While I was sitting fooling with all the controls I was wondering when is Jeff going to get in touch with Lincoln and add a full 14.2 JTR set up??

Last edited by Reefdvr27; Yesterday at 10:43 AM.
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post #35890 of 35893 Old Today, 07:45 AM
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Price drop on the 215's I'm selling. I'm getting new carpet in my house including the basement so I've completely cleared the HT room. Since it feels like I'm "starting over" I'm really wanting to have speakers that can fit behind the screen. I'll probably sell the 212 too so I can have a matching 3 LCR.

Check link below to the sale thread on the classifieds if interested.
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post #35891 of 35893 Old Today, 08:06 AM
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Quote:
Originally Posted by desertdome View Post

You also need to add a High Pass Filter at 20 Hz and a Shelf Filter on the inputs at 20 Hz and 6 dB. This will extend the High Pass Filter to around 15-16 Hz. Here you can see with and without the Shelf Filter.


Question DD,
You said the motu can high pass down to 12.5hz.
Why apply the high pass at 20hz, then use a shelf to bump it to 16hz vs just using the high pass at 16?
Is it in order to run the bass hot at 20hz ish or something else?
Thanks!
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post #35892 of 35893 Old Today, 10:16 AM
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Jeff,

Could you do a custom 210RT with a center horn? For laying flat for a center channel application.
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post #35893 of 35893 Old Today, 12:46 PM
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I'm about to start building my above-garage home theater (29x22). I'm planning on JTR all around, except for atmos in the ceiling. Two questions...

1) I'll be using the standard DD + GG. Can I mount the 8HT-LP's directly to the DD or should I put a layer of OSB in the spots where I'll be mounting the speakers?

2) Any recommendations for Atmos ceiling speakers other than Volts (I'm not a DIY guy)? The JBL 226C looks like a fairly efficient, compression driver speaker for ceiling mount. Any other recommendations?

Thanks!
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215RT , 228ht , captivator , Jtr , Jtr Noesis 212ht 212ht Lp , noesis

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