| How to connct an L-pad ? [message #43048] |
Sun, 16 November 2003 07:50  |
ports
Messages: 19
Registered: May 2009
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Chancellor |
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I would like to install L-pads on the tweeters that I'm using in a set of cabinets that I'm refitting with new drivers but I have no idea how to connect them. The L-pad has 3 "prongs" numbered 1-2-3....how do you connect the "+" & "-" wires from the speaker terminals to the L-pad & then to the tweeter ? These are 100 watt mono L-pads. Any info at all will help as I am NEW to this sort'a thing.....thanx in advance....ports.
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| Re: How to connect an L-pad ? [message #43050 is a reply to message #43048] |
Sun, 16 November 2003 09:08  |
Jeff Robinson
Messages: 26
Registered: May 2009
Location: KC, MO
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Chancellor |
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It should have come with a wiring diagram. The ones I've used have been marked to use terminal 1 for ground, 2 as load and 3 as input. In other words going from lowest number as lowest potential to ground to highest number as highest potential to ground. Do remember if using 2nd order network to reverse the polarity of the tweeter. HTH
Jeff Robinson
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| Re: How to connct an L-pad ? [message #43052 is a reply to message #43048] |
Sun, 16 November 2003 10:06 |
Jeff Robinson
Messages: 26
Registered: May 2009
Location: KC, MO
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Chancellor |
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In re-reading your post I notice you make no mention of an existing crossover network. If using an amp larger than 2 watts you must use a crossover network or you will almost certainly blow your tweeter. The cabinet + (hot) and - (ground) terminals feed power into the crossover. The crossover output then feeds "high pass filtered" signal power to the L-Pad which then feeds the tweeter. The simplest crossover is a first order (6 dB/oct) which is just a single capacitor in series with the tweeter/L-Pad (a 4.7 μF capacitor will cross an 8 Ω tweeter about 4,200 Hz). There are higher order crossover topologies but you'll need to do some studying before attempting to design a crossover from scratch.
Jeff Robinson
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| Re: How to connect an L-pad ? [message #43057 is a reply to message #43054] |
Mon, 17 November 2003 04:42 |
ports
Messages: 19
Registered: May 2009
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Chancellor |
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Thanks Wayne....I'm toying with the idea of using these L-pads right now but they might not be necessary....the KSN1165's are apparently 96db efficient & the Delta 12LF are 97db efficient....they should be okay on their own ? If I was to use 2 II65's for each speaker would you advise wiring them in series or parallel...if parallel should I use the L-pads to turn them down ?
Thanks in advance....ports
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