Hi All-
Sorry for the mundane post but a quick question.
Are the UcD modules ANY more or less sensitive to A/C interference (radiated HUM) than traditional amps?
I am building a 4-channel amp with 2 "conventional" channels and 2 Ucd-180's.
The middle of the amp has to remain open for "other" circuitry so the 4 channels will be on each side.
The question is:
Which pair of channels to put on the A/C input side?
I am very familiar with proper grounding and shielding. Input signal wire is Silver plated, Teflon insulated, shielded twisted pair.
The layout is solid, but this is my first amp with the new breed (class D) amp modules.
Any information would be appreciated.
Sorry for the mundane post but a quick question.
Are the UcD modules ANY more or less sensitive to A/C interference (radiated HUM) than traditional amps?
I am building a 4-channel amp with 2 "conventional" channels and 2 Ucd-180's.
The middle of the amp has to remain open for "other" circuitry so the 4 channels will be on each side.
The question is:
Which pair of channels to put on the A/C input side?
I am very familiar with proper grounding and shielding. Input signal wire is Silver plated, Teflon insulated, shielded twisted pair.
The layout is solid, but this is my first amp with the new breed (class D) amp modules.
Any information would be appreciated.
Hi,
So you've compromised the layout from the start huh? Too bad.
Should really consider mu-metal around your transformer, but I guess what you're concerned about would be the mains input cable.
I've been able to induce him into the amp, but only by using the input single ended, with unshielded wires, and paralleling at least 4+ inches of it within 1 to 1.5" of the mains cable.
So try to stick to the basic proper build techniques and you'll be alright. I'd love to know where you got your wire, what kind it is.
Also since your wire is good, at least keep the connectors well away from the mains. You could put them all one side of the amp and run the shielded wire to the other side, or perhaps with your setup it would make more sense to run the mains connection out of the middle of the amp and keep the inputs on either side closer to the modules.
I wouldn't worry about it too much. It doesn't sound like you're going for all out high end anyway, it won't be very hard at all to ensure there's no audible 60hz hum.
Regards,
Chris
So you've compromised the layout from the start huh? Too bad.
Should really consider mu-metal around your transformer, but I guess what you're concerned about would be the mains input cable.
I've been able to induce him into the amp, but only by using the input single ended, with unshielded wires, and paralleling at least 4+ inches of it within 1 to 1.5" of the mains cable.
So try to stick to the basic proper build techniques and you'll be alright. I'd love to know where you got your wire, what kind it is.
Also since your wire is good, at least keep the connectors well away from the mains. You could put them all one side of the amp and run the shielded wire to the other side, or perhaps with your setup it would make more sense to run the mains connection out of the middle of the amp and keep the inputs on either side closer to the modules.
I wouldn't worry about it too much. It doesn't sound like you're going for all out high end anyway, it won't be very hard at all to ensure there's no audible 60hz hum.
Regards,
Chris
Don't be too insulted, wasn't meant that way. It's not like you opted for four monoblocks though, is it?
And the wire?
And the wire?
This is the prototype amp. 4 channels to bi-amp a pair of speakers.
The center has to be open to tweak the servo controller / DSP for the woofer section.
The two Toroids are in the front of the case sectioned off via a divider.
The final amps / processors will reside in the speaker.
Again, I am trying the Class-D amps for the first time and was not sure of their A/C susceptibility.
The actual A/C wire will be shielded and secured to the bottom corner / edge of the case. As they say, a picture is worth a thousand words.. I will take some pictures as it comes together.
I was just concerned about the UcD being more susceptible to picking up A/C line interference than a "normal" amp.
And the wire is surplus stuff from Steve @ Apex.jr. I use all Silver plated Teflon insulated wire (various gauges) in my projects because he sells it so cheap.
Spkrs are Scan speak Revelator tweets, B&W 6.5" mids, woofers 10" aluminum cone x 2. One box(sectioned) amps in the bottom when complete. Just plug in A/C, balanced inter-connect and remote turn on wire (+12v).
The center has to be open to tweak the servo controller / DSP for the woofer section.
The two Toroids are in the front of the case sectioned off via a divider.
The final amps / processors will reside in the speaker.
Again, I am trying the Class-D amps for the first time and was not sure of their A/C susceptibility.
The actual A/C wire will be shielded and secured to the bottom corner / edge of the case. As they say, a picture is worth a thousand words.. I will take some pictures as it comes together.
I was just concerned about the UcD being more susceptible to picking up A/C line interference than a "normal" amp.
And the wire is surplus stuff from Steve @ Apex.jr. I use all Silver plated Teflon insulated wire (various gauges) in my projects because he sells it so cheap.
Spkrs are Scan speak Revelator tweets, B&W 6.5" mids, woofers 10" aluminum cone x 2. One box(sectioned) amps in the bottom when complete. Just plug in A/C, balanced inter-connect and remote turn on wire (+12v).
Sounds damn neat. Looking forward to seeing it.
If you think about it, they're high frequency power convertors, well designed for handling EMI... dual layer w/ ground plane. Sounds like the measures you already took will be more than enough.
Hey, sorry, I chose my words poorly, and thanks for the tip on the wire, seen that site before, maybe now I"ll use it.
Cheers
If you think about it, they're high frequency power convertors, well designed for handling EMI... dual layer w/ ground plane. Sounds like the measures you already took will be more than enough.
Hey, sorry, I chose my words poorly, and thanks for the tip on the wire, seen that site before, maybe now I"ll use it.
Cheers
Well I really felt silly asking such a newbie type of question, but I have never worked with this type amp before.
As one persons signiture reads:
"Better to ask and bear the shame then not and bear the pain"
So I asked. Sorry for the smart reply, but this has been a design I have been working on for 10+ yrs to replace my current system.
Sources, Proceed AVP, servo controller, Splits from here..
Jeff Rowland Model 2, bi-wire B&W 805's.
Woofer amp back to servo-controller, to stereo 15" woofers in 1.34 cf sealed enclosures.
As you can see it was a BIG complicated system. VERY dynamic and musical, but BIG. VERY low WAF.
I am now moving all amplification and processing to the speakers so the future system will be sources and pre-amp only.
The Ucd will start out on the woofer section to test and then may be raised to the top end and a 400 place on the bottom. Depends on how good it sounds.
As one persons signiture reads:
"Better to ask and bear the shame then not and bear the pain"
So I asked. Sorry for the smart reply, but this has been a design I have been working on for 10+ yrs to replace my current system.
Sources, Proceed AVP, servo controller, Splits from here..
Jeff Rowland Model 2, bi-wire B&W 805's.
Woofer amp back to servo-controller, to stereo 15" woofers in 1.34 cf sealed enclosures.
As you can see it was a BIG complicated system. VERY dynamic and musical, but BIG. VERY low WAF.
I am now moving all amplification and processing to the speakers so the future system will be sources and pre-amp only.
The Ucd will start out on the woofer section to test and then may be raised to the top end and a 400 place on the bottom. Depends on how good it sounds.
Hi Troy,
I saw the sense on your question, that's why I decided to answer it. Still it was a quick reply and I didn't think it through very well, if someone said that to me I'd have come back fighting, don't worry about it 🙂
I'm just a little bit shocked you did all this work and never bothered to give them a listen yet? It must be driving you crazy by now.
I may be misunderstanding you but I sure hope you do test it full range with the UCD, it's got nice airy highs that sound perfectly natural, holographic... you'll see.
Have you modified them at all or would you be willing to? No kidding they're good from the start but get even better.
Hope the effort all pays off for ya anyway, as in it's everything you expected and a whole lot more.
I saw the sense on your question, that's why I decided to answer it. Still it was a quick reply and I didn't think it through very well, if someone said that to me I'd have come back fighting, don't worry about it 🙂
I'm just a little bit shocked you did all this work and never bothered to give them a listen yet? It must be driving you crazy by now.
I may be misunderstanding you but I sure hope you do test it full range with the UCD, it's got nice airy highs that sound perfectly natural, holographic... you'll see.
Have you modified them at all or would you be willing to? No kidding they're good from the start but get even better.
Hope the effort all pays off for ya anyway, as in it's everything you expected and a whole lot more.
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