| MonoPi Experience-The Good, The Bad and The Ugly [message #38578] |
Tue, 08 October 2002 11:02  |
LuxmanLover
Messages: 164
Registered: May 2009
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Master |
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Well I couldn't wait any longer for my coils to show up from Solen, been a week already, gimme a break!...so I went back to plan "A" , wind my own. Since I couldn't accurately measure the value I did the next best thing....wound 2 spools of 15 guage wire to the approximate size of the MIA Solen Inductors. Since I sure they would be way off anyway I sped up the process substantial by winding them on the drill press. 5 minutes to set up, 30 seconds each to wind..lol.....ahhh precision.
Soldered up the rest of the crossover and dragged the semi-completed 4Pi Pro into the house. In went the 2226H and fired it up, in magnicent MONO!!!!!.....Well my first impression wasn't one of joy....I had a preconceived idea of how the 4Pi Pro would sound and this wasn't it. In my mind I thought that it would be some pounding "live sounding Raggae killer" speaker. And it wasn't so. After my initial disappointment I fiddled with the pre-amp and picked some different material....I threw in some Diana Krall to check out the vocal abilities of the 4Pi.....sat down with the gf (girlfriend) and gave it a critical listen. We were shocked ...much back and forth switching between the old system and my new MonoPi ensued. The detail and clarity of the 4Pi was incredible! While it lacked the pounding bass of my old 10" Peerless based speakers, it ("it" lol...isn't it suppose to be them) more than made up with sparking clear detail and bite in Diana's vocals. Well ok...try something else in went Creed.....it was good but not great Scott Straps vocals are rough at the best of times and on MonoPi they were no exception. In went Eric Clapton, Cocaine, WOW....we heard inflection in Erics voice like I had never heard before and so forward sounding it was like he was right there and the bass, it was great...not rumbly or thick just very detailed and POWERFUL. I had my rat shack Db meter beside us just to see how loud it really was, 85 whopping Db, but things in other rooms were bouncing and resonating......to be continued
Kelly
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| Re: MonoPi Experience-The Good, The Bad and The Ugly [message #38580 is a reply to message #38578] |
Tue, 08 October 2002 14:05  |
Rider
Messages: 43
Registered: May 2009
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Baron |
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Hi Kelly.What amp/preamp or receiver are you using. Wattage? Playing at what level? I find as much as it's the vocals that are rough there are differences in the quality of the recordings. The differences become very obvious as the quality of the system improves. I think as much as you start a good system with a solid design part of a good system is "adjustability" to try to compensate for differences in recording. They aren't all equal. Your DIY winding was good for a chuckle. Thanks, Grant.
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| Winding your own [message #38583 is a reply to message #38578] |
Tue, 08 October 2002 15:15 |
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Wayne Parham
Messages: 18676
Registered: January 2001
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Illuminati (33rd Degree) |
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Here are a couple of formulas that might help you when winding your own coils:
Single layer coils
L = NR2 / (6R + 9X) where L = Inductance in microHenries
N = Number of rotations in winding
R = Radius of wire form
X = Length of wire form This formula is for air core coils only and is accurate within 10%.
Multiple layer coils
L = 0.8NR2 / (6R + 9X + 10D) where the above variables are used and D = Depth of windings in wire form This formula is also for air core coils and is accurate within 30%.
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| Maybe [message #38595 is a reply to message #38593] |
Tue, 08 October 2002 19:43 |
LuxmanLover
Messages: 164
Registered: May 2009
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Master |
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What you need to start the inductor is a dowel of Xdia. that is usually some weird non standard size. It needs to be exact length, parallel and all within thousands of an inch to work out right ...a bit beyond my means.
Kelly
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