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Monoprice Monolith 2x200 Watts Per Channel Two Channel Home Theater Stereo Power Amplifier - Factory Refurbished/B-Stock $499

$499.00
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Kick ass two channel amp from Monoprice for the price of $499 SHIPPED. I honestly do not know of a better deal for a powerful 2 channel AB amplifier. Built for monoprice by ATI and comes with a FIVE year warranty.

https://www.monoprice.com/product...th2_bstock
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Created 12-24-2017 at 09:10 AM by DenonOppoMan
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17 Comments

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#2
wish there is a deal for the 7x200.
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#3
Quote from peterc
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wish there is a deal for the 7x200.
maybe by the time they get more stock in July of 2018 there will be!
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#4
Free shipping on the 3-channel, free shipping on the 2-channel, but 5 and 7 channel get slapped with >$100 shipping charges?

I know it's a good deal, but they need to sell it a bit more for me. The last time the 7x200 was on sale, the price difference didn't even cover the shipping, making Amazon cheaper!
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#5
Quote from nytehawk
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Free shipping on the 3-channel, free shipping on the 2-channel, but 5 and 7 channel get slapped with >$100 shipping charges?

I know it's a good deal, but they need to sell it a bit more for me. The last time the 7x200 was on sale, the price difference didn't even cover the shipping, making Amazon cheaper!
And yet...they are sold out of the 7 channel....
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#6
Quote from DenonOppoMan
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And yet...they are sold out of the 7 channel....
I have the cash set aside just for this one part of a system, and I don't want to spend MSRP. Maybe I need to think of it as a $3,000 unit I can get for $1600
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#7
I'd kill for one of these. =)

One thing I'll note about this amplifier is that the leap from a 100wpc amplifier to a 200wpc amplifier nets you only a maximum *3dB* gain in headroom.

To achieve a 10dB gain (which our ears would perceive as roughly twice as loud) over a 100wpc amp you would need a 1,000wpc amplifier.

As you can see, when you start chasing those IMAX-like levels of sound... it's all about the high-efficiency, high-output speakers. Most bookshelf speakers are around 85dB/watt efficient, but there are home theater speakers that achieve 95-100dB efficiency.
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#8
Quote from JohnBooty
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I'd kill for one of these. =)

One thing I'll note about this amplifier is that the leap from a 100wpc amplifier to a 200wpc amplifier nets you only a maximum *3dB* gain in headroom.

To achieve a 10dB gain (which our ears would perceive as roughly twice as loud) over a 100wpc amp you would need a 1,000wpc amplifier.

As you can see, when you start chasing those IMAX-like levels of sound... it's all about the high-efficiency, high-output speakers. Most bookshelf speakers are around 85dB/watt efficient, but there are home theater speakers that achieve 95-100dB efficiency.
You are looking at this wrong. The manufacturer says that your buying a 200 watt amp. 3 DB increments are normal on an amp. They are in fact doubling the power at 3 DB but not doubling the loudness factor. A 3 DB change doubles the output power but only increases loudness by a factor of 1.23 The second factor is sound pressure. 3 DBs in fact double the sound pressure, so even though you didn't gain perceivable sound gain you would in sound pressure. Like Drums in music. It might not sound that much louder but the stronger sound pressure would be greater and you could perceive it as being more full or even louder. The stat I'm missing here is how many amps does it put out.
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Last edited by RickB1248 January 2, 2018 at 07:33 AM.

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#9
Quote from RickB1248
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You are looking at this wrong. The manufacturer says that your buying a 200 watt amp. 3 DB increments are normal on an amp. They are in fact doubling the power at 3 DB but not doubling the loudness factor. A 3 DB change doubles the output power but only increases loudness by a factor of 1.23 The second factor is sound pressure. 3 DBs in fact double the sound pressure, so even though you didn't gain perceivable sound gain you would in sound pressure. Like Drums in music. It might not sound that much louder but the stronger sound pressure would be greater and you could perceive it as being more full or even louder. The stat I'm missing here is how many amps does it put out.
What a bunch of nonsense. If u have a Yamaha/Denon/onkyo class receiver or better with the typical "100 watts per channel", unless u r driving true 4ohm or under speakers AND u r already listening at MAX on the receivers volume capability, any difference u hear from this amp will be >barely perceptible< at best. Complete waste of $500. But I'm about to blow $500 on an M&P AR that will probably collect dust in my closet, so it's all relative. Lol.
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Last edited by JimBanville January 2, 2018 at 07:59 AM.
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#10
Quote from JimBanville
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What a bunch of nonsense. If u have a Yamaha/Denon/onkyo class receiver or better with the typical "100 watts per channel", unless u r driving true 4ohm or under speakers AND u r already listening at MAX on the receivers volume capability, any difference u hear from this amp will be >barely perceptible< at best. Complete waste of $500. But I'm about to blow $500 on an M&P AR that will probably collect dust in my closet, so it's all relative. Lol.
are you an expert? so I guess all amps you listed sound the same? why not just get a 50 watt amp then?
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#11
Let's start the new year off on a positive note and cover the parts you got right. Here are the parts you have right:
Quote from RickB1248
:
3 DBs in fact double the sound pressure
Yep!
Quote :
It [3dB] might not sound that much louder
Yep! It won't be much louder. A little louder, but not much.
Quote :
but the stronger sound pressure would be greater and you could perceive it as being more full or even louder
This is a little bit nonsensical, but okay. A 3dB increase in volume is perceived by the human ear as being louder. But only slightly louder.

So, where was I looking at it wrong? There are parts of your post that didn't make sense, but the parts that made sense seemed to be agreeing with me.

My only purpose in posting here was advise people that while having more power is a good thing, they should not expect a 200W amp to be much louder than a solid 100W amp. It's a common misconception! So I thought I'd address it. But, I definitely regret doing that.
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Last edited by JohnBooty January 2, 2018 at 03:17 PM.
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Quote from bobma
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are you an expert? so I guess all amps you listed sound the same? why not just get a 50 watt amp then?
A solid 50wpc amp will rattle the windows in any small to medium room, if you're using reasonably efficient (close to 90 db/watt) speakers. Examples would be the 50watt Emotiva A-100, or even a 50 watt Marshall guitar amp.

A lot of affordable receivers aren't particularly solid, though. Specifically: they often chintz out on the power supply. If you pick up a Class AB home theater receiver and it weighs next to nothing, you can be pretty sure they cheaped out on the power supply.

Example: The Yamaha S-201/S-202 are nice for the money, since they're only about $125, but despite their "100wpc" rating they won't play as clean at high volumes as the Emotiva A-100. When you pick up the S-201/S-202 they are very, very light.
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Quote from JohnBooty
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A solid 50wpc amp will rattle the windows in any small to medium room, if you're using reasonably efficient (close to 90 db/watt) speakers. Examples would be the 50watt Emotiva A-100, or even a 50 watt Marshall guitar amp.

A lot of affordable receivers aren't particularly solid, though. Specifically: they often chintz out on the power supply. If you pick up a Class AB home theater receiver and it weighs next to nothing, you can be pretty sure they cheaped out on the power supply.

Example: The Yamaha S-201/S-202 are nice for the money, since they're only about $125, but despite their "100wpc" rating they won't play as clean at high volumes as the Emotiva A-100. When you pick up the S-201/S-202 they are very, very light.
the Mirage M3si speakers are around 84db/watt

then I have the BassZilla at 97.5 db open baffle main with a 15" woofer.
https://www.blackdahlia.com/tipin...tip_24.htm

haven't used these yet. got them from a friend for $60. he spent $1800 on the cabinets alone. the drivers are not the upgraded version though.
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#14
Quote from JohnBooty
:
A solid 50wpc amp will rattle the windows in any small to medium room, if you're using reasonably efficient (close to 90 db/watt) speakers. Examples would be the 50watt Emotiva A-100, or even a 50 watt Marshall guitar amp.

A lot of affordable receivers aren't particularly solid, though. Specifically: they often chintz out on the power supply. If you pick up a Class AB home theater receiver and it weighs next to nothing, you can be pretty sure they cheaped out on the power supply.

Example: The Yamaha S-201/S-202 are nice for the money, since they're only about $125, but despite their "100wpc" rating they won't play as clean at high volumes as the Emotiva A-100. When you pick up the S-201/S-202 they are very, very light.
What about the Yamaha A-S501? It is rated 85 wpc, and I have been eyeballing it to power KEF Q100s. Thanks.
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#15
Just picked up one of these. $499 with free shipping, great deal. $250 per channel, the 3 channel is more than $300 per channel in price.
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