Polk LSiM 706C crossover diagram and mods
Comments
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as I mentioned in my posts above recapping and bypassing 706C did the trick for me. you can recap, listen then add bypass if you like and listen again..easy to remove bypass if you don't like it. another interesting thing I noticed is that the R1 and R2 values for 706 vs 705, 706 has only 0.5 ohm (5W) resistor in series with the tweeter and midrange where 705 uses 2.2 and 2 ohm (10W and 15W) resistors instead.
another data point folks might find interesting is how much more transparent L200 is vs Lsim 705. did some listening last night to compare the two. 705 still has the details but is much more laid back/polite vs L200 whose midrange is much more forward and top end has much more detail. wonder how would 705 sound with L200 tweeter?
did quick house curve app freq. sweep and you can see the difference between the two in pure direct mode, L200 in green and Lsim 705 in grey:
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I grabbed a pair of crossovers for a good price and I will experiment with them. I will also try replacing the internal wire with the same Cardas Litz as in my 2.3's. Should be fun.
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Nice work!
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Also wanted to share this simple LEDR speaker test which stands for "Listening Environment Diagnostic Recording,". It is available on Chesky Records Jazz Sampler & Audiophile Test CD via apple music as track 11, plus tracks 10 and 12 also evaluate center image and soundstage depth.
https://www.stereophile.com/content/take-me-your-ledr
This would be used to set up/evaluate correct positioning of your speakers, their imaging capabilities and your room impact.
