VTV Hypex Ncore NC252MP (It's all Amir's fault)

[Matias]

What is the gain on that?

25.5

 

[Hcg76]

I received a 4-channel VTV amp w/ the NC502MP modules and no 12v trigger this past week. The amplifier runs perfectly and is flawless in operation. However as some mentioned here there’s a loud pop when my unit is powering down.

Is the loud noise at all damaging to speakers? Anyway to fix it without having to install or modify anything? TIA.

 

[CDMC]

I received a 4-channel VTV amp w/ the NC502MP modules and no 12v trigger this past week. The amplifier runs perfectly and is flawless in operation. However as some mentioned here there’s a loud pop when my unit is powering down.

Is the loud noise at all damaging to speakers? Anyway to fix it without having to install or modify anything? TIA.

Some hypex amps have a turn off thump. If you have a loud crack, start by disconnecting your preamp from it and power cycling to see if it is better. If it is, you have an upstream component generating DC offset.

 

[Hcg76]

Some hypex amps have a turn off thump. If you have a loud crack, start by disconnecting your preamp from it and power cycling to see if it is better. If it is, you have an upstream component generating DC offset.

Ok, I’ll try that. Do you know if this loud crack is harmful for speakers? Any way to take care of the DC offset issue if that’s the case? I appreciate it.

 

[Hcg76]

I unplugged my processor from the amplifier and the loud pop is still there. I realize a slight pop sound may be normal of some Hypex amps but this is louder than I’ve ever heard.

 

[Sal1950]

Is the loud noise at all damaging to speakers?

I wish there was some way to definitively answer your question but we can't determine how loud is "loud"?
In the vast majority of cases I would say no, don't worry about it.
But obviously at some point of "loud", a speaker could be damaged.
My best guess is, if it doesn't rattle dishes in the kitchen, your probably OK
but but but but?

Anyway to fix it without having to install or modify anything? TIA.

Not that I can think of, have you talked to the manufacturer?

I do have one idea, don't turn it off. It's a Hypex amp and doesn't draw much power.

 

[Hcg76]

I wish there was some way to answer your question but we can't determine how loud is "loud"?
In the vast majority of cases I would say no, don't worry about it.
But obviously at some point of "loud", a speaker could be damaged.
My best guess is, if it doesn't rattle dishes in the kitchen, your probably OK
but but but but?

Not that I can think of, have you talked to the manufacturer?

The popping sound upon amp shutoff is definitely louder than normal, maybe 80dB loud?, rather than just a slight pop. But chatting with the manufacturer, who was kind enough to answer product questions on a weekend btw, the pop while annoying is normal. He says efficient speakers, like I use, will tend to accentuate the popping sound more. I can live with that if it doesn’t mean anything getting damaged.

 

[Grierts]

I am Debating on getting either:

Buckeyes Hypex NC502MP Amplifier, 4-channel

Or

VTV PASCAL L-PRO2S Four Channel Amplifier 4X800W

I can afford the $250 price difference.

Is there a reason to get one over the other ??
This would be to just power my LCR speakers in my HT.

LR Speakers: Emotiva B1+
Center: Emotiva C2+
AVR: Integra DRX 3.4

 

[Matias]

I am Debating on getting either:

Buckeyes Hypex NC502MP Amplifier, 4-channel

Or

VTV PASCAL L-PRO2S Four Channel Amplifier 4X800W

I can afford the $250 price difference.

Is there a reason to get one over the other ??
This would be to just power my LCR speakers in my HT.

LR Speakers: Emotiva B1+
Center: Emotiva C2+
AVR: Integra DRX 3.4

Hypex ncore measures way better than Pascal.

 

[Sal1950]

I am Debating on getting either:

Please don't cross post questions in multiple threads.
Thanks.

 

[beren777]

"Hypex pop"

I've noticed this on my Buckeye NC502MP as well. There is a slight pop when the relay triggers on or off.

1. It uses what appears to be a coil relay. Would an optically-isolated relay be less susceptible to pop?
2. If I use a relay which supports both NO and NC, I can use time delay circuits to the PS enable and amp mute pins. NC would assert amp mute, NO would assert PS enable. The delay circuits would ensure amp mute is asserted when the PS is enabled or disabled. Might this resolve the pops?

 

[JK002]

DIY Hypex NC252mp
I used the ARCTIC TP-3 Thermal Pad, the temperature of the closed amplifier is 32.5 degrees Celsius top panel
set of cables from ghentaudio very long delivery time from China so I used what I had at home when they arrive I will replace them
it is absolutely silent, no hum, I use pro-ject for box ds2 digital as a preamplifier

Review and Measurements of Pro-Ject Pre Box S2 Digital

This is a detailed measurement and review of Pro-Ject Pre Box S2 Digital. The unit is on loan to me from a kind member but it is one that I have been eyeing for good few months given the designer, John W, who is active on other forums. It was sold in Europe for a while until becoming available...

www.audiosciencereview.com

 

[Sal1950]

I use pro-ject for box ds2 digital as a preamplifier

I like the use of the wood panels, very handsome.