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  • Monoprice Monolight Multi-Channel Power Amplifier w/ XLR: M8250x 8x200W-Channel Home Theater $2149.99 or M8125x 8x100W-Channel Home Theater $1699 + Free Shipping via Monoprice
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expired Posted by Discombobulated | Staff • Sep 28, 2022
expired Posted by Discombobulated | Staff • Sep 28, 2022

Monoprice Monolight Multi-Channel Power Amplifier w/ XLR: M8250x 8x200W-Channel Home Theater $2149.99 or M8125x 8x100W-Channel Home Theater $1699 + Free Shipping via Monoprice

$1,700

$2,000

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Model: Monolith by Monoprice M8125x 8x100 Watts Per Channel Class-D Multi-Channel Home Theater Power Amplifier with XLR Inputs Hypex NC252MP

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60 Comments

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Sep 29, 2022
1,485 Posts
Joined Apr 2017
Sep 29, 2022
killerrabbit1961
Sep 29, 2022
1,485 Posts
Quote from JimBanville :
They use something like this for the reasons I ppointed out in my question to you. You'd know if you "needed" this. It wouldn't be a ambiguous.
He wasn't asking "why", he was asking "how", as in pre-out on receiver to input on power amp.
Sep 29, 2022
170 Posts
Joined Mar 2019
Sep 29, 2022
DavidL1996
Sep 29, 2022
170 Posts
Quote from AGpennypacker :
I don't think I do, but I was curious how the setup goes. Do they buy a receiver with XLR outputs or a lower end but with all the current atmos etc and use speaker wire to XLR.

Just wanting to learn how they use something like this.
XLR output connections typically only come on processors, not on receivers.

You cannot adapt XLR to speaker outputs, could be adapted to receivers with RCA pre-outs, but you'll lose the inherent noise rejection of a balanced XLR circuit.
Sep 29, 2022
214 Posts
Joined Oct 2015
Sep 29, 2022
blindShame
Sep 29, 2022
214 Posts
Quote from JimBanville :
Just don't expect "better" sounding audio from this if your currently using a decent avr from Denon/Onkyo/Yamaha/etc with no issues.
I was wondering the same. Seemingly, the only reason to purchase a dedicated multi-channel amp is to eliminate the planned obsolescence that is the treadmill of Dolby and DTS. Buy this new receiver because your old one doesn't have ATMOS.

Most receivers have discrete amps just like this one. Why does it cost more to buy them inside of a dedicated package?
1
Sep 29, 2022
439 Posts
Joined Feb 2022
Sep 29, 2022
PowerfulPlant2899
Sep 29, 2022
439 Posts
Quote from Check4me :
What's so special about this amplifier as compared to others? Curious to know as it's highly priced
The price is what's special,perhaps it will grow your manhood. IDK..I'm baffled too!
1
Sep 30, 2022
274 Posts
Joined Jan 2012
Sep 30, 2022
mazingaz
Sep 30, 2022
274 Posts
Quote from ONLYUSEmeDEALS :
"you think that you can spent money". Huh
Actually , Monolith amps are more like "bang for the bucks" type .
Sep 30, 2022
197 Posts
Joined Oct 2010
Sep 30, 2022
DC_Nole
Sep 30, 2022
197 Posts
Quote from blindShame :
I was wondering the same. Seemingly, the only reason to purchase a dedicated multi-channel amp is to eliminate the planned obsolescence that is the treadmill of Dolby and DTS. Buy this new receiver because your old one doesn't have ATMOS.

Most receivers have discrete amps just like this one. Why does it cost more to buy them inside of a dedicated package?
Not really. Receivers are rated for two channels driven at 8 ohms, which made total sense back in the day of stereo. 99.9% of amps don't have a discrete power supply. They have a shared power supply. Adding new features is cheap, but upgrading a power supply is very expensive. That's why most manufacturers don't want to do it. Essentially, you're dividing down the power every time you add another speaker.

That's the purpose of an external amplifier. It's really not about max volume either, it's really about dynamic impulse response. A small power supply. It does not hove the reserves to quickly go from low to high. The receiver output now acts like a low pass filter and averages it. So you hear less detail.

An amp, on the other hand, is rated for each channel independently. So 8 channels times 100 means eight channels outputting 100 Watt simultaneously.

I'm not telling you to buy this product. Personally. I think it's overpriced. That is an electrical engineer's explanation for why someone would purchase a discrete amp.
Last edited by DC_Nole September 29, 2022 at 09:28 PM.
1
Sep 30, 2022
214 Posts
Joined Oct 2015
Sep 30, 2022
blindShame
Sep 30, 2022
214 Posts
Quote from Check4me :
What's so special about this amplifier as compared to others? Curious to know as it's highly priced
From my own experiences combined with what I'm reading here, I think that sustained volume and power requirements are the factor. Most of us don't have high requirements to this end due to the fact that we will experience hearing damage in the use cases for these sorts of dedicated amplification.

But there are occasions that present the need for such an amp. I witnessed such an occasion at an Oktoberfest party that is held annually by a friend of my wife (well, her husband - I don't know any women this crazy).

Just a regular house in Metro Detroit. Less than an acre in a suburban neighborhood. The husband owns a successful microbrewery so his man-cave second garage at the back of the property is his beer brewing lab among the other man-cave necessities (very nice, eat off of the floor, stainless everything, etc).

I didn't know anything about audio back then other than a good system is to be appreciated. But there were two amplifier-only boxes that were each dedicated to a single speaker (brands all unknown) - only two channels but everything was beefy, including the arc-welder speaker cables. I knew enough then to understand that this probably cost a pretty penny just from my junior high perusing's of the Crutchfield catalog back when they sent catalogs in the mail. But I didn't understand why it had to be expensive until both blood-alcohol and volume levels went up later the Oktoberfest party.

It was the loudest residential system that I've ever heard - hearing damage loud. I've heard loud systems before but none of them were this accurate. Even at your large venue rock/pop concerts, there is some distortion that everyone seems to accept as requisite to play that loud. I didn't understand until I heard loud music played accurately at this party. It seemed impossible.

The system played for hours and never broke a sweat.

Was I impressed? Absolutely. Do I need one? No. Most people don't. Do I want an 8x100W Class D amp just in case I might need it in an emergency? Most definitely.

Even the best AV receivers are rated for home use cases - if you check the rated wattage, it will state "per channel into 8 ohms (20-20,000 Hz) at 0.05% THD with 2 channels driven". Onkyo rates at 0.08%. Yamaha at 0.06%.

You can get spendy on Arcam AVR which rate at 0.02% but I can't even hear the difference between the top mainstream brands at home-use volume levels.

TLDR: dedicated amps (especially class D) are great for filling a large area with sound for extended periods because they have a power supply which is built to support non-home use cases. They definitely have a market but it is very niche.
1

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Sep 30, 2022
564 Posts
Joined Oct 2018
Sep 30, 2022
TravisB3211
Sep 30, 2022
564 Posts
Quote from ZT3942 :
To the asshole who keeps disliking any post which has info about separates (btw, this thread is about a separate amp? right?) -- go enjoy your vizio soundbar and stop threadcrapping by downvoting posts!
Not all of them have been down voted. Your previous post was because it actually didn't have any helpful information.
3
Sep 30, 2022
138 Posts
Joined Nov 2014
Sep 30, 2022
madcity81
Sep 30, 2022
138 Posts
Quote from dharans :
I have wondered the same. But then why would extremely educated and experienced music and theater lovers plunk down 5 times the cost of an integrated AVR to purchase separates like this? If it doesnt sound better then what is the purpose? Loudness? Any volume over 80dB for more than 20 minutes will likely lead to hearing damage...
I have the 7x200w monolith amp hooked up with a Yamaha RX A3070 amplifier and I can honestly say that the monolith amp really helped with sound quality. I'm using the monolith to power my 2 front and center Klipsch reference speakers.
Sep 30, 2022
1,237 Posts
Joined Nov 2012
Sep 30, 2022
i_max2k2
Sep 30, 2022
1,237 Posts
I'm wondering can the output be bridged combining 2 8ohms, can't see any spec for the bridged output.