Capacitors have arrived

heiney9
heiney9 Posts: 25,165
edited February 2012 in 2 Channel Audio
I was poking around on the 'net looking for a budget oriented deal on some decent Poly caps for modifying a pair of RT25i's and RTi38's. They both use an electrolytic bypassed by a film cap for the high pass. I didn't want to buy the usual suspects. Dayton had the exact values, but I'm not sold on Dayton for the high pass.

DIY Cable, Inc. had certain values of Clarity APW caps for a really good price. They are 160v so they are physically a little smaller than the 250v Clarity PX line and they seem to be just about the same sonically (from what I've read). I also bought a pair of 4.7uF for coupling caps in my new Keces DA-151 USB Dac.

If you have a need for some of these caps I can highly recommend DIY Cable. I ordered late on Friday and they shipped Monday USPS Priority and they arrived today.

Obligatory photo's from my cell phone.

Clarity-001.jpg

Clarity-002.jpg

H9
"Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • audiocr381ve
    audiocr381ve Posts: 2,588
    edited February 2012
    Sweet man! I never saw the red ones before.

    How does voltage effect the sound anyway? (I realize that may be a very vague question) I wonder because I used the PX line in my SDA 2B crossovers.
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  • pearsall001
    pearsall001 Posts: 5,068
    edited February 2012
    It looks like a fun project awaits. Keep us posted as it moves along. Of course pics are mandatory!
    "2 Channel & 11.2 HT "Two Channel:Magnepan LRSSchiit Audio Freya S - SS preConsonance Ref 50 - Tube preParasound HALO A21+ 2 channel ampBluesound NODE 2i streameriFi NEO iDSD DAC Oppo BDP-93KEF KC62 sub Home Theater:Full blown 11.2 set up.
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  • heiney9
    heiney9 Posts: 25,165
    edited February 2012
    That's a loaded question. Some say voltage affects sound, some say it doesn't. Usually higher voltage caps in the same line, with the same material have thicker and/or more windings. In my case the stock speaker crossover caps are 50v. The lower the voltage the smaller the cap in this case. So 160v caps are over what is specified but they are slightly smaller than the 250v PX line. It will help because real estate on the pcb is very limited.

    In the case of using (2) 4.7uF coupling caps in my Keces DA-151, the originals are 100v caps and there isn't much room for anything much larger. A 630v cap would never fit physically. The 250v caps will fit but very snug. These 160v caps are just a few mm's larger than the stocj 100v poly's in there. So I mainly grabbed these for size and because I like Clarity caps and the price was a bargain as well.

    If you click on the link you'll see they don't offer a lot of values and the values are not the most common.

    I need a 9uF and 6.2uF for the x-overs and I ended up getting a 9.2uF and 6.2uF (close enough) the 4.7uF I'll use for coupling is an exact value, so I couldn't see passing them up.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • heiney9
    heiney9 Posts: 25,165
    edited February 2012
    In theory and I believe if you ask most capacitor manufacturers they will say they all should sound the same.
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • bmbguy
    bmbguy Posts: 416
    edited February 2012
    I'm just curious...

    I'm fairly new to all this discussion, but I was surprised to see 400V and 630V caps used in crossovers. I had no idea such high voltages would/could be generated, and maybe they aren't.

    While I don't have any opinion whether or not the higher voltage caps are better/worse than the others, does anybody have any pointers to info that talks about just what voltages would actually be measured across these caps during use? Just curious, more than anything. I mean, I just recapped my guitar amp, and with 400V B+ supply to a vacuum tube circuit, I can see the need for 500VDC filter caps. But these crossover circuits are obviously nothing like that, and I'm just a little surprised at the high voltage tolerances for the caps. Of course, I don't run 1000 watt stereo amp at high levels either...

    I guess I could just open up some speakers and stick my scope on them to measure for myself, couldn't I...
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