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Wim M

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About Wim M

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    Belgium, Temse

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  1. Wim M

    RF7 II upgrade?

    Upgrade fever: replaced the Parasound A21 by a McIntosh MC 275. Tubes on highs & solid state on bass.
  2. Wim M

    Bi-Amp question / thought

    Yes. My Lo amp is wired directly to the woofers. HP at 60 Hz and LP at 400 Hz. The hi amp is delayed with 0,8ms. The load on this amp is reduced by a HP at 225 Hz. Another option is removing the tweeter and replacing it at the back of the top cab. Though, I heard others say that doesn't improve much. If I find some time, I"m sure willing to check it out, as it can easily be reversed.
  3. Wim M

    Bi-Amp question / thought

    The original passive crossover.
  4. Wim M

    Bi-Amp question / thought

    We bi-amp our LS2s. DSP is a Xilica XP 4080. A Mac MC 275 powers the MF/HF section, and a QSC DCA series powers the bass section. I think bi-amping is really cool because you can tune the speaker to your personal taste (like tubes on Hi and SS on Lo) and time align bass and MF horn. When you learn how to use REW it gets even cooler. Then you can correct the speaker's in room response.
  5. Wim M

    Active Bi-Amping/Tri-Amping FAQ

    OK, I see that your amp doesn't have balanced outputs, so I think you use RCA to XLR adapters. My best guess is that this is the source of your problem.
  6. Wim M

    Active Bi-Amping/Tri-Amping FAQ

    Which speakers exactly give a problem? The ones that are connected directly to an amp or the ones that go through a processor? Otherwise you'll have to expand this a bit, as I can't figure out how everything is connected.
  7. Wim M

    RF-7II Owners Thread

    Agreed. I'd add a separate 2 ch power amp to power those 7s.
  8. Wim M

    Active Bi-Amping/Tri-Amping FAQ

    It is most likely you blow a speaker when it is underpowered. When this is the case and you crank it up to loud levels, the amp will start to distort (clip), and distortion is actually something speakers don't like at all. I don't see any problem bi-amping with the AVR you mentioned, as long as you don't go up to really stupid loud levels. Note that the Denon you mentioned, puts out 95 Watts/ch with only 2 channels in use. If you use all of its channels, this number will decrease significantly. When you connect the rest of the speakers you mentioned, you 'll see the Denon break into a sweat rather soon. This is where it gets tricky as for damaging speakers. I'd recommend adding a separate 2 ch power amp to power your 2 biggest speakers, this will relief your AVR a lot, and make the rest sound cleaner.
  9. Wim M

    Active Bi-Amping/Tri-Amping FAQ

    Yeah, Chris helped us too. I'm still trying to figure out how he came to his results based upon the measurements I sent him. The only thing I can say is that our LSIIs sing like never before since Chris' results are loaded in the Xilica. @Chris A, big thanks! Wim
  10. Wim M

    Active Bi-Amping/Tri-Amping FAQ

    I saw some guys selling their Xilica XP 4080, because they are upgrading to an XD model. I know that the difference between the two models is that the XD models have FIR filters. Did some research on FIR filters but I think it is still a bit over my head. So, without going too much into technical detail, is there an audible difference between the two (XP vs. XD) that is worth the trouble of upgrading? I use an XP 4080 on a pair of bi-amped La Scala IIs and a pair of THT subs, should it make sense to use an XD model on this setup? Wim
  11. Wim M

    Active Bi-Amping/Tri-Amping FAQ

    Hey Maarten, I’ve seen several xp4080s on 2ehands, and it appears there ‘s little interest in them. Wim
  12. What fans do you use as replacements? We use 2 QSC DCA series amps and are looking for replacement fans which are a bit more quiet.
  13. Wim M

    Tuba Home Theatre Low Profile...

    Glad to hear you finally got things running! I'd suggest trying different X-over points, slopes, delays, cut off your mains, etc... I'm sure you'll find a setting which will put a big smile on your face.
  14. Wim M

    DIY Bass cab - KP 480 style

    If I'm not mistaken, I believe he said he uses 48 dB slopes.
  15. Wim M

    DIY Bass cab - KP 480 style

    Jason, I think I'm not completely getting this. If you high pass your La Scalas at 200, and lowpass your THTLP at 45, what do you use in the 45-200Hz range?