I used these:
Mic Connectors
for my Leach preamp (admittedly only +/-24VDC) years ago. They seem similar to connectors recommended elsewhere on diyaudio today
GX12 Connector manufacturers_GX12 Connector suppliers-Renhotecpro
Mic Connectors
for my Leach preamp (admittedly only +/-24VDC) years ago. They seem similar to connectors recommended elsewhere on diyaudio today
GX12 Connector manufacturers_GX12 Connector suppliers-Renhotecpro
It has MC in mind. Many here are reducing gain for MM types whose gain overdrives the Pearl. I didn't notice a problem with standard gain settings on two MM I have, YMMV.
Others have used setups for really low output MC...guess it depends, as usual on your ancillaries. I have heard mine with a Dennon LOMC, it had enough but volume knob was cranked way more than usual. What power amp gain is and speaker efficiency is, room size, listening preferences will play into all this.
This is with Pearl 2 standard gain build BTW.
Russellc
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You can get the Pearl 2 into a 1U chassis without putting a caps on side. Those 10k caps are the Key. I ended up finding an ideal solution with a slightly larger footprint (30mm, vs 25mm on the board) and using a heatsink on the regs that I could bend to accommodate.
On thing to keep an eye on - my boards had a slight warp upward that ate into the clearance I allowed for components.
Attachments
For a modicum of safety, save 3-pin XLR's for audio signals. Use a dedicated DC power connector or a 4-pin XLR for power. Neutrik makes nice, inexpensive panel jacks and cable connectors that make mixing up signal and power cables impossible: xlr Neutrik 4 Position XLR Connectors | Mouser.
Why noy use the Neutrik Power Con made for power input? Similarly, it is mix up proof with their other connectors. I love them, instead of having to make a raggedy power inlet hole in square shape, on of my step bits largest step is perfect.
neutrik power con Neutrik | Mouser
Russellc
I also love the powercon, but strictly speaking they’re for AC and to avoid plugging AC into DC, should be reserved for AC. For those of us who aren’t running mixing consoles, etc, the chance of a mix-up is pretty slim....
to jamayfie #1940
Hello jamayfie,
I connect my PSUs to Preamps / Phono - pre most often with the Neutrik- XLR-4-pole.
Works nice. Neutrik specs the connectors only for Audio- / AC-signals. Not for
DC. The pic shows my BA-3 preamp (seperated cases for PSU / preamp / dual-mono). I also did this with my Pearl I and Pearl II.
Greets
Dirk
Hello jamayfie,
I connect my PSUs to Preamps / Phono - pre most often with the Neutrik- XLR-4-pole.
Works nice. Neutrik specs the connectors only for Audio- / AC-signals. Not for
DC. The pic shows my BA-3 preamp (seperated cases for PSU / preamp / dual-mono). I also did this with my Pearl I and Pearl II.
Greets
Dirk
Attachments
With the Neutrik powercons no problem with interchange / confusion. 😀
And rated by Neutrik for AC.
Dirk
And rated by Neutrik for AC.
Dirk
Well these amps do plug into AC ya know! LOL. I only use power con for AC in, no other Neutriks are in the system. Maybe I misunderstood. I thought you were talking about AC in. Sorry.
Russellc
Well I first tried them because of the round mounting hole is easier for me. Power amps anymore I get the DIYaudio store Chassis, precut for square one found in Back panel kit.
The only place I use them in a power amp is my original F5, which I made the chassis for. It is dual mono all the way, with even 2 power cords! I know, sort of silly but it made initial fire up easy to do one side at the time!😀
All other power cons are on pre amps.
Russellc
Oddly, if I remember correctly, the Speaker wire versions, Speak on? were rated for slightly more amperage than the Power Cons which I found unusual.
Russellc
Russellc
A little beefier than what I used for my Pearl 2 umbilical. If I remember right I used a microphone cable plug and microphone cable. Plug plugged in of course then an outside collar screwed onto the chassis part. I think 6L6 suggested that to me? Its been a while since I built it! I usually copy his build guides to the letter and get things working before implementing my own "innovations."
Russellc
Yes, speakONs seem to be capable of gobs of current.
I remember reading that the Pass XS product umbilical cords use Speakon connectors.
I remember reading that the Pass XS product umbilical cords use Speakon connectors.
Yes. These:
Mic Connectors
I used these for my Leach preamp back in the late '70s.
I'd use 'em again unless I was employing Super Regulators in which case I think I'd want more than four contacts.
Mic Connectors
I used these for my Leach preamp back in the late '70s.
I'd use 'em again unless I was employing Super Regulators in which case I think I'd want more than four contacts.
I used 4 pin XLRs for my Pearl 2 with Canare 4S8 Star Quad 16AWG cable, plus, minus and two ground conductors. The Canare barely fit the XLR4, both pins and strain relief, in fact had to leave the strain relief out of the shell boot and clip a few strands of the copper to fit the pins.
In future, would only use the XLR4 with 18AWG or smaller wire, which is probably plenty for this design.
In future, would only use the XLR4 with 18AWG or smaller wire, which is probably plenty for this design.
Thanks for the suggestions on the umbilical. I bought Nuetrik 4-pin connectors and 6 feet of Belden 24 AWG shielded mic cable at Parts Express when I was buying the RCAs and other parts. The cable has two twisted pairs. I plan to Use one conductor for +, one for - and the other two for ground. Any reason not to use one of the twisted pair for + and -? I suppose I should use a female socket on the PS back panel Rather than pins for safety. Oh, what about the shield? Ground it somehow on the Pearl end only?
24 AWG is a bit light weight. I wouldn't use it, even at 6 feet. A good cable would be Canare 4S8 20 AWG 4 con (unshielded):
Canare 4S6 Star Quad Speaker Cable by the Foot - Black
As far as grounding a cable shield to the XLR4 shell, single ended connection is usually best, typically the destination end, in this case, the preamp chassis connector. You would also jumper the shell of the chassis jack (if plastic) to the metal chassis.
Yes, female at each chassis with male to male plugs.
Canare 4S6 Star Quad Speaker Cable by the Foot - Black
As far as grounding a cable shield to the XLR4 shell, single ended connection is usually best, typically the destination end, in this case, the preamp chassis connector. You would also jumper the shell of the chassis jack (if plastic) to the metal chassis.
Yes, female at each chassis with male to male plugs.
I use this, it's inexpensive and rated at 2.9A 300V, so plenty for the small current draw of the Pearl 2. I bought a reel of it to use for power and signal connections.
Belden Brilliance 8412 20 AWG 2C Mic Line Instrument Cable Tinned Copper Braid Shield Per Foot USA
Belden Brilliance 8412 20 AWG 2C Mic Line Instrument Cable Tinned Copper Braid Shield Per Foot USA
McQuaide and avdesignguru: Thanks for the links and advice. I found some online wire calculators and entered 30VDC and 1 amp, and all indicated the voltage drop was negligible and heat was not an issue. We are regulating to 24V anyway, so I may Stick with the 24AWG cable for now and buy some 20AWG next time I order from PE.