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post #1 of 13 Old 03-02-2020, 11:03 AM - Thread Starter
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Question How much amp is enough amp for 9.x.6 in a 20x14 room?

I'm murdering my brain over this for I'm pretty sure no good reason, and need help.
Have a monoprice HTP-1, a CNAMPX-7x200, a CNAMPX-12x60, and a CNAMPX 16x60.

Goal is 9.1.6. Room is roughly 20.5 feet by 14 feet. Screen is 10 feet wide, have not decided on AR, but am leaning 16:9 though can be convinced otherwise. Plan is in-wall LCR, ceiling atmos, haven't firmly settles on the rest of the channels or subs. Am guessing subs need their own / dedicated sub amps / won't work right off of these amps.

The main issue is that with the Crestron amps, while the 7x200 will put out 300w/ch to 4 ohm speakers; the 12x60 and 16x60 will only either put out 90w/ch to 4 ohm speakers, or can be bridged (220w/ch), but the external bridging is apparently unstable / won't tolerate 4 ohm speakers.

Ultimately, the question is -- how much power do I need for the 9 channels?

I feel like I should be able to pick 2/9 channels and give them "just" 90w/ch; but am worried that this will goof things up.

Alternatively, I can try to get another 7x200, then I have LOTS of spare parts and way too many channels, but all 9 channels would get their own 200w/ch and then the 6 atmos speakers would get 90w/ch, and that should all be fine. But then I have 4 of these behemoths in the house, one that I probably didn't need to get at all, and there will be questions from key stakeholders.

Thoughts?
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post #2 of 13 Old 03-02-2020, 11:11 AM
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Most important question to answer, what speakers do you have, how efficient and are they an 4ohm or 8ohm load?


DIY subs require a plate amp or rack mount amp (, dayton audio, behringer, crown, etc.) but if you buy a commercially available sub (SVS, HSU, PSA) they already come with a plate amp.
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post #3 of 13 Old 03-02-2020, 11:14 AM
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Quote:
Originally Posted by Anand Patel View Post
I'm murdering my brain over this for I'm pretty sure no good reason, and need help.
Have a monoprice HTP-1, a CNAMPX-7x200, a CNAMPX-12x60, and a CNAMPX 16x60.

Goal is 9.1.6. Room is roughly 20.5 feet by 14 feet. Screen is 10 feet wide, have not decided on AR, but am leaning 16:9 though can be convinced otherwise. Plan is in-wall LCR, ceiling atmos, haven't firmly settles on the rest of the channels or subs. Am guessing subs need their own / dedicated sub amps / won't work right off of these amps.

The main issue is that with the Crestron amps, while the 7x200 will put out 300w/ch to 4 ohm speakers; the 12x60 and 16x60 will only either put out 90w/ch to 4 ohm speakers, or can be bridged (220w/ch), but the external bridging is apparently unstable / won't tolerate 4 ohm speakers.

Ultimately, the question is -- how much power do I need for the 9 channels?

I feel like I should be able to pick 2/9 channels and give them "just" 90w/ch; but am worried that this will goof things up.

Alternatively, I can try to get another 7x200, then I have LOTS of spare parts and way too many channels, but all 9 channels would get their own 200w/ch and then the 6 atmos speakers would get 90w/ch, and that should all be fine. But then I have 4 of these behemoths in the house, one that I probably didn't need to get at all, and there will be questions from key stakeholders.

Thoughts?

How much power depends on how loud you want your system to be......once you figure that out then the easy fix is to purchase TWO- two channel amps... one for L/R and one for the subs...so you will have the 7x200 for 7 channels and the other amp for the atmos... DONE


Juju

Sub List: 1- Red Five Mini V1 Devastator 18" w/PA460, 1- Red Five Devastator LFE 21", 1- Red Five Devastator 21" Finalizer V2 DF , 1- BOSS platform [The Hideaway Theater], 2- 18" "Full Marty" tuned to 17Hz w/RSS460HO
Wish List: Anthology http://www.speakerdesignworks.com/Anthology_1.html

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post #4 of 13 Old 03-02-2020, 11:42 AM
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Quote:
Originally Posted by Anand Patel View Post
I'm murdering my brain over this for I'm pretty sure no good reason, and need help.
Have a monoprice HTP-1, a CNAMPX-7x200, a CNAMPX-12x60, and a CNAMPX 16x60.

Goal is 9.1.6. Room is roughly 20.5 feet by 14 feet. Screen is 10 feet wide, have not decided on AR, but am leaning 16:9 though can be convinced otherwise. Plan is in-wall LCR, ceiling atmos, haven't firmly settles on the rest of the channels or subs. Am guessing subs need their own / dedicated sub amps / won't work right off of these amps.

The main issue is that with the Crestron amps, while the 7x200 will put out 300w/ch to 4 ohm speakers; the 12x60 and 16x60 will only either put out 90w/ch to 4 ohm speakers, or can be bridged (220w/ch), but the external bridging is apparently unstable / won't tolerate 4 ohm speakers.

Ultimately, the question is -- how much power do I need for the 9 channels?

I feel like I should be able to pick 2/9 channels and give them "just" 90w/ch; but am worried that this will goof things up.

Alternatively, I can try to get another 7x200, then I have LOTS of spare parts and way too many channels, but all 9 channels would get their own 200w/ch and then the 6 atmos speakers would get 90w/ch, and that should all be fine. But then I have 4 of these behemoths in the house, one that I probably didn't need to get at all, and there will be questions from key stakeholders.

Thoughts?
You might be interested in the Outlaw 2200 amplifier, 200 watts. On sale now for $799 delivered for 3 of them.
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post #5 of 13 Old 03-03-2020, 12:43 PM - Thread Starter
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Originally Posted by eriksells916 View Post
Most important question to answer, what speakers do you have, how efficient and are they an 4ohm or 8ohm load?


DIY subs require a plate amp or rack mount amp (, dayton audio, behringer, crown, etc.) but if you buy a commercially available sub (SVS, HSU, PSA) they already come with a plate amp.

I'm leaning towards Triad in-wall/on-wall surrounds and commercial subs. The triads are 4 ohms. The Totems are 6 ohms, so that's another option. The Def Tech in-walls are 8 ohms, but don't seem to have kept up speaker tech wise with Triad.
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post #6 of 13 Old 03-03-2020, 12:45 PM - Thread Starter
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Originally Posted by jujuman200 View Post
How much power depends on how loud you want your system to be......once you figure that out then the easy fix is to purchase TWO- two channel amps... one for L/R and one for the subs...so you will have the 7x200 for 7 channels and the other amp for the atmos... DONE


Juju
I'm hoping to keep the amps matched in terms of manufacturer and class -- the amps I have are all class AB amps made by ATI. Getting a single stereo ATI AB amp would cost more than all 3 amps together so far.
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post #7 of 13 Old 03-03-2020, 01:11 PM
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Quote:
Originally Posted by Anand Patel View Post
I'm leaning towards Triad in-wall/on-wall surrounds and commercial subs. The triads are 4 ohms. The Totems are 6 ohms, so that's another option. The Def Tech in-walls are 8 ohms, but don't seem to have kept up speaker tech wise with Triad.

Yea if you have the funds Triad makes an excellent speaker, plus they include enclosures. Are you going to do a base layer of 7/9 speakers with 6 ceilings? If so, save some money on the ceiling speakers and get these which are often recommended here in the forums https://rslspeakers.com/c34e-ceiling-speaker/



Take pics when your done!
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post #8 of 13 Old 03-04-2020, 05:16 AM
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Quote:
Originally Posted by Anand Patel View Post
I'm leaning towards Triad in-wall/on-wall surrounds and commercial subs. The triads are 4 ohms. The Totems are 6 ohms, so that's another option. The Def Tech in-walls are 8 ohms, but don't seem to have kept up speaker tech wise with Triad.
Anand,

If you want my Triad Speaker Matching Chart and the Triad Room Size Guide, let me know.

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post #9 of 13 Old 03-04-2020, 06:58 AM
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I would match the HTP-1 with a full set of nCore based amps such as Nord or KJF Audio.

Not only are they class D, they are also perfectly gain matched at 2.5V which is the sweetspot for the HTP-1 output voltage.

Tower Cinema - 9.1.6 in a 12'x12' room
Input : Nvidia Shield TV, Panasonic DMP-UB400
Magic : Marantz SR7010, Marantz SR6010, 2x NAD T743
Output : Panasonic TX65EZ952B, SVS PB13 Ultra, Monitor Audio GSLCR 2xGS20 2xGS10 4xGSFX 6xBX1
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post #10 of 13 Old 05-21-2020, 02:18 PM - Thread Starter
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Originally Posted by Dawn Gordon View Post
Anand,

If you want my Triad Speaker Matching Chart and the Triad Room Size Guide, let me know.
Yes, please.
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post #11 of 13 Old 05-21-2020, 02:20 PM - Thread Starter
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Originally Posted by Mashie Saldana View Post
I would match the HTP-1 with a full set of nCore based amps such as Nord or KJF Audio.

Not only are they class D, they are also perfectly gain matched at 2.5V which is the sweetspot for the HTP-1 output voltage.
Part of the trick to being able to afford nice speakers is that the amps were super cheap by going with the ATI built Crestron amps. I have a 16x60 and a 12x60 -- externally bridgable --> plenty of channels (caveat, may need separate amps for in-wall subs, but that's fine).

Thoughts?
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post #12 of 13 Old 05-22-2020, 05:32 AM
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Yes, please.
Sent.

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post #13 of 13 Old 05-22-2020, 06:12 AM
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Quote:
Originally Posted by Anand Patel View Post
Part of the trick to being able to afford nice speakers is that the amps were super cheap by going with the ATI built Crestron amps. I have a 16x60 and a 12x60 -- externally bridgable --> plenty of channels (caveat, may need separate amps for in-wall subs, but that's fine).

Thoughts?
Assuming the speakers aren't hard to drive and you redirect the bass duty to your subwoofers it should be ok.

My 9 ear level speakers are driven by a single Marantz SR7010 AVR while the heights are powered by two 3x50W NAD AVR's. I don't feel the sound level is lacking in a 12x12 room.

Tower Cinema - 9.1.6 in a 12'x12' room
Input : Nvidia Shield TV, Panasonic DMP-UB400
Magic : Marantz SR7010, Marantz SR6010, 2x NAD T743
Output : Panasonic TX65EZ952B, SVS PB13 Ultra, Monitor Audio GSLCR 2xGS20 2xGS10 4xGSFX 6xBX1
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