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frontpage Posted by CleverActivity6849 • Feb 3, 2023
frontpage Posted by CleverActivity6849 • Feb 3, 2023

OSD Nero Multi Channel Home Theater Amplifiers: 7-Channel $750, 5-Channel

& More + Free S/H

$600

$700

14% off
108 Comments 35,868 Views
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Top Comments

Little more to it than that
Many speakers ...the Bowers and Wilkins I own for instance....change impedance greatly depending on what range they are playing
There is not a downside to having ample power
They are hiding THD (Total Harmonic Distortion).
Any amp can play louder than its specs, if distortion is ignored.
Always suspicious of power ratings when the company doesn't post the FTC power specs, such as "100watts per channel, 2 channels driven, 20- 20,000Hz at 0.1% THD." It feels like they are hiding something.

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Feb 3, 2023
252 Posts
Joined Dec 2008
Feb 3, 2023
SRR1138
Feb 3, 2023
252 Posts
https://youtu.be/idHbpKuTdcg found this review.
Feb 3, 2023
423 Posts
Joined Jun 2020
Feb 3, 2023
Grabdadeal
Feb 3, 2023
423 Posts
I have got one 5ch around thanks giving for 629 and is tax free. So now with 599 and no tax and free shipping this is a steal comparative to its competitors. And 5ch amps that outputs 150wpc is costly elsewhere. What people do not understand is that they do not need to over power their speakers more than Rated RMS. It's just shelling out money for nothing.

Performance- it's perfect bang for your buck. Underpowered speakers tend to clip easily moving them to repairs in short time. So use an amp, and enjoy listening. I was highly satisfied with this product and brands that make a hell out of you just for their marketing. Perfect for any setup.
Last edited by Grabdadeal February 3, 2023 at 07:02 AM.
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killerrabbit1961
Feb 3, 2023
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Quote from Grabdadeal :
I have got one 5ch around thanks giving for 629 and is tax free. So now with 599 and no tax and free shipping this is a steal comparative to its competitors. And 5ch amps that outputs 150wpc is costly elsewhere. What people do not understand is that they do not need to over power their speakers more than Rated RMS. It's just shelling out money for nothing.

Performance- it's perfect bang for your buck. Underpowered speakers tend to clip easily moving them to repairs in short time. So use an amp, and enjoy listening. I was highly satisfied with this product and brands that make a hell out of you just for their marketing. Perfect for any setup.
Always suspicious of power ratings when the company doesn't post the FTC power specs, such as "100watts per channel, 2 channels driven, 20- 20,000Hz at 0.1% THD." It feels like they are hiding something.
1
Feb 3, 2023
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Feb 3, 2023
pixelpusher15
Feb 3, 2023
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Quote from Grabdadeal :
What people do not understand is that they do not need to over power their speakers more than Rated RMS. It's just shelling out money for nothing.
Furthermore, people don't understand that giving your speaker more power doesn't make them automatically better. Even if you're within the RMS rating.

Power demands are a function of speaker sensitivity, desired SPL, and listening distance. If you listen to speakers that are 3' away you more than likely will be fine with a single watt. 20 feet away...you need more wattage.

Here's a calculator to help people figure out what they need.
http://myhometheater.homestead.co...lator.html

Use a single speaker, choose where it is located in relation to a wall, input your speaker sensitivity and play with wattage to see what the results are. You need 105dB to fully go to reference. If on your AVR/processor you listen at -15 then subtract 15 from that...so 90dB.

You can come up a bit short and its usually ok. The brain fills in up to 6dB of clipping but I'd try to get it within 3dB.
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Feb 4, 2023
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LastButNotLeast
Feb 4, 2023
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Quote from killerrabbit1961 :
Always suspicious of power ratings when the company doesn't post the FTC power specs, such as "100watts per channel, 2 channels driven, 20- 20,000Hz at 0.1% THD." It feels like they are hiding something.
Really not that hard to find. Click on "See Deal," then "Specifications." For example:
Power Output @ 8 Ohm: 165W RMS per Channel
Power Output @ 4 Ohm: 260W RMS per Channel
Frequency Response: 7.5Hz to 80kHz +/-0.5dB
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Feb 4, 2023
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turnne
Feb 4, 2023
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Quote from LastButNotLeast :
Really not that hard to find. Click on "See Deal," then "Specifications." For example:
Power Output @ 8 Ohm: 165W RMS per Channel
Power Output @ 4 Ohm: 260W RMS per Channel
Frequency Response: 7.5Hz to 80kHz +/-0.5dB
They also post the all channel driven simultaneously specs as well

You would never seen that in anything but the highest end AVR's from the manufacturer
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turnne
Feb 4, 2023
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Quote from pixelpusher15 :
Furthermore, people don't understand that giving your speaker more power doesn't make them automatically better. Even if you're within the RMS rating.

Power demands are a function of speaker sensitivity, desired SPL, and listening distance. If you listen to speakers that are 3' away you more than likely will be fine with a single watt. 20 feet away...you need more wattage.

Here's a calculator to help people figure out what they need.
http://myhometheater.homestead.co...lator.html

Use a single speaker, choose where it is located in relation to a wall, input your speaker sensitivity and play with wattage to see what the results are. You need 105dB to fully go to reference. If on your AVR/processor you listen at -15 then subtract 15 from that...so 90dB.

You can come up a bit short and its usually ok. The brain fills in up to 6dB of clipping but I'd try to get it within 3dB.
Little more to it than that
Many speakers ...the Bowers and Wilkins I own for instance....change impedance greatly depending on what range they are playing
There is not a downside to having ample power
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Feb 4, 2023
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tommytinks
Feb 4, 2023
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I purchased the 5 channel and 7 channel back in September of 2022 and can without any doubt say that the sound improvement in my home theater at higher volumes has increased for intricate details... At lower normal listening levels you cannot tell huge difference from regular AVR power but at higher volumes closer to reference levels I have noticed clearer and more detailed dynamic shifts in movie effects on my system. The price at this level 499 and 749 are an absolute steal for quality, well built amplifiers. A person will not find a better deal than this right here!
Last edited by tommytinks February 3, 2023 at 05:25 PM.
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Feb 4, 2023
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bcg27
Feb 4, 2023
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Looks like a very good price for the performance if they're the same as the Outlaws. Here's a detailed review of the Outlaw 5 channel: https://www.audiosciencereview.co...iew.10585/
Feb 4, 2023
552 Posts
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pixelpusher15
Feb 4, 2023
552 Posts
Quote from turnne :
Little more to it than that
Many speakers ...the Bowers and Wilkins I own for instance....change impedance greatly depending on what range they are playing
There is not a downside to having ample power
As do most speakers - impedance is an average, after all. Most receivers and amps can handle 4ohm speakers just fine anyway. The most important things to consider is always SPL, sensitivity, and listening distance. There's a ton of audiophiles listening on 25w tube amps and pretty loud volumes.

The downside to having a lot of power is spending unneeded money on it that you could have invested in better speakers, room treatments, subwoofers, a display, etc, etc.

Don't just buy specs, buy what you actually need.
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Feb 4, 2023
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labboypro
Feb 4, 2023
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Quote from turnne :
Many speakers ...the Bowers and Wilkins I own for instance....change impedance greatly depending on what range they are playing
Literally all speakers do this. Voice coils are inductors. Inductors have an 'inductive reactance' that opposes current flow, and is mathematically proportional to frequency. Speakers use impedance (Z) to define this variable resistance, and manufacturers typically spec a "nominal Impedance," which is the approximate designed impedance, as a 'baseline' for that value, which is usually very close to its actual DC resistance outside of the magnetic field in the air gap of the speaker (as in, if the voice coild was just sitting on a table by itself).

Arbitrary example..
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youra6
Feb 4, 2023
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DIRECT15 takes off 15% the original MSRP so its technically cheaper to use the coupon by a few dollars.

I bought the 5 channel back when it was 400 and I hear a lot of people say its identical (or virtually) to the Outlaw 5000X. I have both, they are NOT really identical. The layout is similar and both use the same Chinese OEM but they are not the same. I remember the OSD using completely different capacitors. The transformer looks identical however. Its possible that the OSD is the same as the older 5000(non-X) but im purely speculating.

Sonically they are very similar to the outlaw and for the price under 600 is better than anything else in its price bracket.
Last edited by youra6 February 3, 2023 at 06:18 PM.
Feb 4, 2023
193 Posts
Joined Apr 2017
Feb 4, 2023
mantikos
Feb 4, 2023
193 Posts
Quote from youra6 :
DIRECT15 takes off 15% the original MSRP so its technically cheaper to use the coupon by a few dollars.

I bought the 5 channel back when it was 400 and I hear a lot of people say its identical (or virtually) to the Outlaw 5000X. I have both, they are NOT really identical. The layout is similar and both use the same Chinese OEM but they are not the same. I remember the OSD using completely different capacitors. The transformer looks identical however. Its possible that the OSD is the same as the older 5000(non-X) but im purely speculating.

Sonically they are very similar to the outlaw and for the price under 600 is better than anything else in its price bracket.
It would have to be the 5000X because the X has balanced inputs as does this afaik
Last edited by mantikos February 3, 2023 at 06:27 PM.
Feb 4, 2023
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turnne
Feb 4, 2023
14,507 Posts
Quote from labboypro :
Literally all speakers do this. Voice coils are inductors. Inductors have an 'inductive reactance' that opposes current flow, and is mathematically proportional to frequency. Speakers use impedance (Z) to define this variable resistance, and manufacturers typically spec a "nominal Impedance," which is the approximate designed impedance, as a 'baseline' for that value, which is usually very close to its actual DC resistance outside of the magnetic field in the air gap of the speaker (as in, if the voice coild was just sitting on a table by itself).

Arbitrary example..
Not really....since some vary greatly in impedance.over a given range

Depending on how low they go in impedance, at what range and how loud you play in that range it makes a difference.
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Feb 4, 2023
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turnne
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Quote from pixelpusher15 :
As do most speakers - impedance is an average, after all. Most receivers and amps can handle 4ohm speakers just fine anyway. The most important things to consider is always SPL, sensitivity, and listening distance. There's a ton of audiophiles listening on 25w tube amps and pretty loud volumes.

The downside to having a lot of power is spending unneeded money on it that you could have invested in better speakers, room treatments, subwoofers, a display, etc, etc.

Don't just buy specs, buy what you actually need.
I would argue your initial point as I have had an AVR clip and shut down...

To your point thought...I would buy what you NEED for your specific situation and not really heed generalities.as a litmus test
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