Monoprice Monolith 7 Amplifier Review - Page 21 - AVS Forum | Home Theater Discussions And Reviews
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post #601 of 678 Old 03-19-2019, 04:45 PM
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Originally Posted by Norris Kasey View Post
Yeah I need to order some more speaker wire. Plan on it when I get a chance. I have to put them above the fronts on the walls. Will pick up another pair for the rear wall above the surrounds. Side wall are not an option. How high do I need to mount them? I believe I have 9ft ceilings

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Normally, surrounds are placed just above seated head height as a general rule of thumb, so heads in a row don't block the sound from the drivers to other listeners. That way you gain more separation if you have overheads or heights for immersive surround or plan on adding them later.

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post #602 of 678 Old 03-19-2019, 08:12 PM
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That really doesn't answer my question.. how far up the wall do I need to mount the atmos modules. In ceiling is not going to happen four can lights up there now. They are not spaced out evenly. The idea crossed my mind to remove them and put ceiling speakers in but then would not be square. I have to work with the space I am given. One day maybe I can get a bigger place to do a dedicated theater.

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post #603 of 678 Old 03-19-2019, 09:29 PM
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Originally Posted by Norris Kasey View Post
That really doesn't answer my question.. how far up the wall do I need to mount the atmos modules. In ceiling is not going to happen four can lights up there now. They are not spaced out evenly. The idea crossed my mind to remove them and put ceiling speakers in but then would not be square. I have to work with the space I am given. One day maybe I can get a bigger place to do a dedicated theater.

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Sorry, I guess I didn't see your reply the first time around as you didn't quote me and I didn't get a notification of a response.



What brand and make of modules are you using currently? That will help in any discussion of what is the best course of action.



If they are purely "Enabled" modules and not multi-purpose then they normally cannot be used as regular on-wall heights because of their frequency response and narrow sound dispersion characteristics. If they're like Klipsch add-on's for Atmos, they work similarly as angled SVS Prime Elevation speakers that can be mounted on the wall or the ceiling and are not truly up-firing enabled speakers. If it's the former and not the latter, then you may need to purchase different speakers.

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post #604 of 678 Old 03-20-2019, 03:48 PM
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The hum comes from the amp not the speakers. I have no cable TV in the room. I separated all the wires and cables as best I could. I'll have to check it out again tonight. Its frustrating because the Integra DTA 70.1 it replaced was dead quiet in the exact setup.

It sounds good besides the hum. Although I cant hear an audible difference between the 2 amps or my Onkyo NR3008 either.
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post #605 of 678 Old 03-20-2019, 04:26 PM
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Originally Posted by Liquid$team View Post
The hum comes from the amp not the speakers. I have no cable TV in the room. I separated all the wires and cables as best I could. I'll have to check it out again tonight. Its frustrating because the Integra DTA 70.1 it replaced was dead quiet in the exact setup.

It sounds good besides the hum. Although I cant hear an audible difference between the 2 amps or my Onkyo NR3008 either.
If you have not already done it, I would contact Monolith. They have very good customer and product support. You might have a ticket for a brand new amp.

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post #606 of 678 Old 03-21-2019, 03:51 PM
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After just dealing with a lengthy return of a monolith 12 sub the absolute last thing I want to do is return this 100lb monster. It was honestly quite annoy how heavy it was lol. The monoprice return process is lengthy and bulky...at least for expensive heavy items that monoprice really doesn't want to pay return shipping on. So I'm going to try to figure this thing out on my own. The return process is so ****ty IMO that I'd rather spend time trying to get this amp right than just shipping it back. I'm normally not like that but between the weight and the return process I'm just done.
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post #607 of 678 Old 03-23-2019, 07:35 AM
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Looking for a 3 channel amp the monolith 3x or ati 1803. Any recommendations. I can only find the ati for list price so there is about a $600 difference between the two.
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post #608 of 678 Old 03-23-2019, 03:35 PM
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Looking for a 3 channel amp the monolith 3x or ati 1803. Any recommendations. I can only find the ati for list price so there is about a $600 difference between the two.
I have listened to only a few amplifiers that were not in an AVR. Honestly to me they all sound the same. Maybe if you are spending monster dollars with $10k speakers it makes a difference? I would just go for the cheaper amplifier in the monolith 3.
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post #609 of 678 Old 03-23-2019, 04:15 PM
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Originally Posted by Liquid$team View Post
I have listened to only a few amplifiers that were not in an AVR. Honestly to me they all sound the same. Maybe if you are spending monster dollars with $10k speakers it makes a difference? I would just go for the cheaper amplifier in the monolith 3.
The Monolith is getting really good reviews,just concerned about some people having humming issues. But I am definitely leaning towards the monolith. Better to order through Amazon or Monoprice?
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post #610 of 678 Old 03-24-2019, 12:34 PM
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The Monolith is getting really good reviews,just concerned about some people having humming issues. But I am definitely leaning towards the monolith. Better to order through Amazon or Monoprice?
My Monolith has been a game changer as far as sound quality vs. my AVR. What would help getting rid of the last bit of hum I have would be a processor with balanced output.

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post #611 of 678 Old 03-25-2019, 11:36 PM
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My Monolith has been a game changer as far as sound quality vs. my AVR. What would help getting rid of the last bit of hum I have would be a processor with balanced output.
I have balanced outputs from my marantz and still have a hum....
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post #612 of 678 Old 03-26-2019, 12:07 AM
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Do you guys just get hum in the power supply and or the speakers as well? I am getting it in both. Starting to think my AVR is causing some issues. My Atmos speakers have hum and they are only connected to the AVR. The rest of my speakers are in the monolith 7

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post #613 of 678 Old 03-26-2019, 08:39 AM
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Originally Posted by Liquid$team View Post
I have balanced outputs from my marantz and still have a hum....


Does your Marantz use a 2 prong or 3 prong power cable?


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post #614 of 678 Old 03-26-2019, 10:45 AM
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Does your Marantz use a 2 prong or 3 prong power cable?


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IIRC, they're all 2-prong.

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post #615 of 678 Old 03-26-2019, 03:21 PM
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If you disconnect the Monolith amplifier's inputs from all other components so that the only thing connected to the amp is speakers, and you don't hear hum, then the problem is somewhere else and not a fault of the amplifier. It is quite possible that a ground loop can exist between up-stream components and the power amp. If the amplifier still hums with nothing but speakers connected, then the amp is defective.
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post #616 of 678 Old 03-26-2019, 09:28 PM
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If you disconnect the Monolith amplifier's inputs from all other components so that the only thing connected to the amp is speakers, and you don't hear hum, then the problem is somewhere else and not a fault of the amplifier. It is quite possible that a ground loop can exist between up-stream components and the power amp. If the amplifier still hums with nothing but speakers connected, then the amp is defective.
The hum was present the moment I plugged the amplifier in...... no other cables present. It's absolutely the amplifier.
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post #617 of 678 Old 03-27-2019, 03:33 AM
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The hum was present the moment I plugged the amplifier in...... no other cables present. It's absolutely the amplifier.
Did you try to use a cheater plug (ground lift) and see if the hum is still there?

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post #618 of 678 Old 03-27-2019, 08:31 AM
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The only other thing I can think of that could cause hum while no input is connected is that your power line AC has a lot of noise pollution. The pollution would have to be pretty bad to get past the amp's rejection of power supply noise, but anything is possible. Basically all power amps have non-regulated high voltage power supplies, but the nature of the audio circuitry usually rejects the noise on the supply rails.
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post #619 of 678 Old 03-27-2019, 05:16 PM
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Originally Posted by Liquid$team View Post
The hum was present the moment I plugged the amplifier in...... no other cables present. It's absolutely the amplifier.
It is likely transformer hum which can vary from amp to amp.
You can contact Monoprice and try another.

It may also be related to your power.
Audioholics report good results removing hum with this device:

https://emotiva.com/collections/acce...products/cmx-2

I'd give it a try.

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post #620 of 678 Old 03-28-2019, 04:19 AM
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It is likely transformer hum which can vary from amp to amp.
You can contact Monoprice and try another.

It may also be related to your power.
Audioholics report good results removing hum with this device:

https://emotiva.com/collections/acce...products/cmx-2

I'd give it a try.

- Rich
I have previously looked at that conditionner, but was worried about performance degradation.

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post #621 of 678 Old 03-28-2019, 04:54 AM
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Quote:
Originally Posted by RichB View Post
It is likely transformer hum which can vary from amp to amp.
You can contact Monoprice and try another.

It may also be related to your power.
Audioholics report good results removing hum with this device:

https://emotiva.com/collections/acce...products/cmx-2

I'd give it a try.

- Rich
Years ago, I had a problem with transformer hum in my Outlaw 7500; I live in an old neighborhood and there were problems with the local power supplier infrastructure, i.e., creating DC hum. I used this device and it completely removed the hum.....great product.
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post #622 of 678 Old 03-29-2019, 09:12 AM
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I actually got rid of the noise/hum. Unfortunately I did not follow proper troubleshooting protocol so I have no idea what the fix was. Many cables were moved plugs moved speaker wire moved.... none of this had anything to do with trying to fix the hum I was just cleaning up my spider web of cables.... and now its quiet.
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post #623 of 678 Old 03-29-2019, 09:17 AM
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I think I need to do the same thing. It has to be a cable shielding issue or something.

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post #624 of 678 Old 03-29-2019, 07:17 PM
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Quote:
Originally Posted by Liquid$team View Post
I actually got rid of the noise/hum. Unfortunately I did not follow proper troubleshooting protocol so I have no idea what the fix was. Many cables were moved plugs moved speaker wire moved.... none of this had anything to do with trying to fix the hum I was just cleaning up my spider web of cables.... and now its quiet.
Sounds like two possibilities to me; the first is that you might have the same problem I have with intermittent noise on my AC line. These come and go but are usually in the evening when power demand is probably highest on the shared power pole transformer I share with 3 neighbors.

The other possibility is that you had a dirty RCA connector and the act of moving it was enough to scrape the crud off the terminal(s). RCA plugs are the most awful connector type to ever have the misfortune of being invented, and they are dogged by connectivity issues which usually cause buzzes and hum, if not outright lack of signal. I've had all these problems with RCAs, and I use good professional quality Canare gold plated types. RCAs are just a crappy design. Even "audiophile approved" high priced cables are not immune to this.
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post #625 of 678 Old 03-30-2019, 03:05 AM
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Sounds like two possibilities to me; the first is that you might have the same problem I have with intermittent noise on my AC line. These come and go but are usually in the evening when power demand is probably highest on the shared power pole transformer I share with 3 neighbors.

The other possibility is that you had a dirty RCA connector and the act of moving it was enough to scrape the crud off the terminal(s). RCA plugs are the most awful connector type to ever have the misfortune of being invented, and they are dogged by connectivity issues which usually cause buzzes and hum, if not outright lack of signal. I've had all these problems with RCAs, and I use good professional quality Canare gold plated types. RCAs are just a crappy design. Even "audiophile approved" high priced cables are not immune to this.
I share my transformer with 2 neighbors. I don't think it was a power issue.

Also I have balanced XLR connections so no RCA cables at all.

The hum was present immediatly present upon first plug in. Maybe there was some moisture present from shipping across the country that was causing some issue? It was an open box amplifier too so after the hum I thought to myself "oh thats why the person sent it back" lol..... but anyway it's gone now and all my cables are now secured in cable trays and with cable tie mounts so I'm not moving anything around to figure out what caused a problem I don't have anymore lol.
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post #626 of 678 Old 03-30-2019, 08:02 AM
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Originally Posted by Liquid$team View Post
I share my transformer with 2 neighbors. I don't think it was a power issue.
How do you know it isn't a power issue?

I say this because the hum (buzz) might return at some point, and it could very well be power related, usually DC (high even order distortion) on the power line. Especially since the problem appears to have cleared itself up for no explainable reason, you should have a plan of what to do if it returns. The Emotiva box which blocks DC would be the first thing to try if this happens.
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post #627 of 678 Old 03-30-2019, 08:31 AM
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why the power amplifier have hole gound in back?,for shur monolith have problem whit the noise in the speaker.


last 2 month I have émotiva xpa-5 and I wont one other power amplifier ,many people said the monolith is more strong power,I buy monolith 5x200w and I put the xpa5 other place and I put the monolith 5 x200w same place to xpa 5 ,same cable .same connection .


Immidiately when I open monolith 5x200w the noise comming in 3 speakers ,center ,surround right and left back surround ,that not normal some thing no work good in the power amplifier ,I return the monolith 5x200w.

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post #628 of 678 Old 03-30-2019, 08:36 AM
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Quote:
Originally Posted by Liquid$team View Post
I share my transformer with 2 neighbors. I don't think it was a power issue.

Also I have balanced XLR connections so no RCA cables at all.

The hum was present immediatly present upon first plug in. Maybe there was some moisture present from shipping across the country that was causing some issue? It was an open box amplifier too so after the hum I thought to myself "oh thats why the person sent it back" lol..... but anyway it's gone now and all my cables are now secured in cable trays and with cable tie mounts so I'm not moving anything around to figure out what caused a problem I don't have anymore lol.

I wouldn't be surprised if it isn't a transformer or external source issue, especially since you share the load. One of your neighbors may have been using equipment that has a heavy draw on the line, or other anomaly.
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post #629 of 678 Old 04-06-2019, 07:37 AM
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I go to the électronique store and I explein to how fix the noise in the speaker, when you have noise, you put grounding adapter from amazon (GROUNDING ADAPTOR GLOBE ÉLECTRIC NO-54786)the guy from this store said many people have power amplifier ,monolith or émotiva running whit this adaptor for manys years and never have noise in the speakers and never have problem.

marantz av 8805, 13 chanels, emotiva 2 xpa 5 gen1,1 emotiva xpa3 gen3, 7.4.6,4 speakers monitor 11 ,2 paradigm studio 100 v2,4 ceillings speakers ss82w sweet spot earthquake ,2 earthquake ecs-8.0,1 center Paradigm cc390,4 subs klipsch r-sw112 sw.antimod 8033 perfect bass kit paradigm, Buttkicker amplificateur lfe 1000 watts, , tv oled 65e6p,, room 12x25x7,bluray player oppo bdp 203,4coolers ac infinity s9 fan.
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post #630 of 678 Old 04-13-2019, 09:02 AM
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before I have émotiva 5x200watts and I take off and I PUT 5 X200WATTS AND AFTER 7X200WATTS AND SAME PROBLEM for both ,I start to make noise in
speaker .


Iam shur the monolith power amplifier have problem noise filter Inside de product.

marantz av 8805, 13 chanels, emotiva 2 xpa 5 gen1,1 emotiva xpa3 gen3, 7.4.6,4 speakers monitor 11 ,2 paradigm studio 100 v2,4 ceillings speakers ss82w sweet spot earthquake ,2 earthquake ecs-8.0,1 center Paradigm cc390,4 subs klipsch r-sw112 sw.antimod 8033 perfect bass kit paradigm, Buttkicker amplificateur lfe 1000 watts, , tv oled 65e6p,, room 12x25x7,bluray player oppo bdp 203,4coolers ac infinity s9 fan.
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