Do all Hypex NC502MP build use flat ribbon cables for signal inputs and isn't it sub-optimal?

[PHD]

Hi

I'm looking to buy a 3 or 4-channel power amp based on the Hypex NC502MP modules. My first choice was the VTV which is the cheapest option I found:

VTV Amplifier Hypex NC502MP+NC500MP Three Channel Amplifier 3X500 W | VTV Amplifier

I notice that it uses coaxed shielded cables for the input signals instead of the commonly found (Hypex standard?) flat ribbon interconnects, as those in the Buckeye amps:

Buckeye Amps

Buckeye Amps utilizes the most advanced audio amplifier technologies available. Authorized seller for Hypex and Purifi Class D amplifiers. Based in the US. Free shipping and worldwide service!

www.buckeyeamp.com

However, then I noticed that the photo on the VTV product page is not of the NC502MP module. It looks like the NC122MP.

I did contact VTV (Warren Coleman - the owner) and brought this to their attention but he told me that it is the NC502MP but an old photo of a previous revision, which of course don't make sense because Hypex never had more than one version of the NC502MP.

I kindly asked him to send me an updated photo of the amp's internal but to my surprise he dodged this request. So now, VTV is no longer an option, which leaves me with Buckeye and with my other concern: why a flat unshielded ribbon cable is used for the input signal instead of a shielded one, like the NC502MP cable set offered by Ghent Audio:

(B315a-S1) DIY Stereo Case-kit for Hypex NC502MP

B-series Stereo case-kit, applicable modules are: ( case-kit exclude the following module) ------ NC502MP ------ It's a solderless kit if choosing screw-type XLR :) ------ Custom drilling for other suitable modules

www.ghentaudio.com

Shouldn't a shielded cable provide better noise immunity that a ribbon?

@Buckeye Amps


Thanks

 

[Hayabusa]

Hi

I'm looking to buy a 3 or 4-channel power amp based on the Hypex NC502MP modules. My first choice was the VTV which is the cheapest option I found:

VTV Amplifier Hypex NC502MP+NC500MP Three Channel Amplifier 3X500 W | VTV Amplifier

I notice that it uses coaxed shielded cables for the input signals instead of the commonly found (Hypex standard?) flat ribbon interconnects, as those in the Buckeye amps:

Buckeye Amps

Buckeye Amps utilizes the most advanced audio amplifier technologies available. Authorized seller for Hypex and Purifi Class D amplifiers. Based in the US. Free shipping and worldwide service!

www.buckeyeamp.com

However, then I noticed that the photo on the VTV product page is not of the NC502MP module. It looks like the NC122MP.


View attachment 391375

I did contact VTV (Warren Coleman - the owner) and brought this to their attention but he told me that it is the NC502MP but an old photo of a previous revision, which of course don't make sense because Hypex never had more than one version of the NC502MP.

I kindly asked him to send me an updated photo of the amp's internal but to my surprise he dodged this request. So now, VTV is no longer an option, which leaves me with Buckeye and with my other concern: why a flat unshielded ribbon cable is used for the input signal instead of a shielded one, like the NC502MP cable set offered by Ghent Audio:

(B315a-S1) DIY Stereo Case-kit for Hypex NC502MP

B-series Stereo case-kit, applicable modules are: ( case-kit exclude the following module) ------ NC502MP ------ It's a solderless kit if choosing screw-type XLR :) ------ Custom drilling for other suitable modules

www.ghentaudio.com

Shouldn't a shielded cable provide better noise immunity that a ribbon?

@Buckeye Amps


Thanks

Interleaved grounds in a flat cable is also to some extend a shielding..

 

[Buckeye Amps]

To be fair to VTV, that image is clearly an NC252MP and NC250MP so it seems like a simple image mixup on his site.

Regarding the ribbon vs. shielded cable: in a short answer, the possible noise difference is negligible using one over the other for such a short run in this application setting.

 

[somebodyelse]

In the ribbon the hot and cold signals are in adjacent conductors, with a ground in the next conductor providing some shielding from other signals in the ribbon. In theory it's not quite as good as if they were twisted, but still pretty good. In practice look at the measurements for the finished amps.

 

[PHD]

Thanks.

I assume that the speaker wires in the Buckeye amp are twisted? Also, no EMI/RF filter is used on the AC plug is done on propose as per Bruno Prezel's recommendations?

 

[Buckeye Amps]

Thanks.

I assume that the speaker wires in the Buckeye amp are twisted? Also, no EMI/RF filter is used on the AC plug is done on propose as per Bruno Prezel's recommendations?

Yes. And yes.

 

[restorer-john]

as per Bruno Prezel's recommendations?

That made me laugh.

@PHD Putzeys.