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226 Views 9 Replies Latest reply: Sep 14, 2012 3:27 PM by RonMarton RSS
kempor Just Startin' 5 posts since
Sep 13, 2012
Currently Being Moderated

Sep 13, 2012 7:15 AM

XD-V35 High pass filter

Hi! I wonder if there is any way of turning the built in high pass filter off in the XD-V35L wireless system.

I´m planning on using it to get my measurment microphone wireless. Because of that I want the system as transparant as possible.

The XD-V75 has a off setting for the modelling but it´s double the price.

  • dboomer Line 6 Support 1,997 posts since
    Oct 13, 2008
    Currently Being Moderated
    Sep 13, 2012 8:23 AM (in response to kempor)
    Re: XD-V35 High pass filter

    The "dynamic/environment filter"?  It is not turned on in the V35L beltpack (but is present in the handheld).

      • RonMarton Iknowathingortwo 357 posts since
        Jan 12, 2012
        Currently Being Moderated
        Sep 13, 2012 12:14 PM (in response to kempor)
        Re: XD-V35 High pass filter

        I've found that the TBP12 beltpacks are indeed capable of providing a truly transparent signal path via my XD-V70 & 75 receivers.

         

        Would your budget maybe allow consideration of "splitting the difference" in price by going for that TBP12-enabled switchable modeling in an XD-V55L ?

         

        I would have thought that the slightly larger investment would pay off in terms of both more flexibility and extra range, ...really handy for your intended audiometric application.

          • RonMarton Iknowathingortwo 357 posts since
            Jan 12, 2012
            Currently Being Moderated
            Sep 14, 2012 1:14 AM (in response to kempor)
            Re: XD-V35 High pass filter

            I'm almost certain it can't...

             

            But whether that's a actually problem would depend on the specific type of audio analysis you have in mind.

             

            Bear in mind that the industry-leading Brüel & Kjaer measurement mic (by way of an example) is flat all the way down to a truly subsonic 15hz and that, in the interests of self-defence, ANY mass-produced wireless system is specifically configured to avoid passing anything below 20Hz.

             

            (Incidentally, price notwithstanding, the "bulletproof" Lectrosonics SM/HM transmitters and SR/Venue receivers you've mentioned would be most unsuitable for your application, as their digitally assisted analog transmission system achieves its audio excellence through very clever, self-analysing, multi-band companding, ...thereby most elegantly [and expensively] defeating any analysis of spectrum ! )

             

            If, however, all you're after is a highly mobile "feedback finder" and "venue tamer" for re-enforcement applications, then I reckon the XD-V35L may well pass muster, as its high-pass filter is specifically designed to leave the vital vocal frequencies (and those above) totally unaffected.

             

            So you'll find that not only are the room nodes that give most problems in these situations generally above the V35L filter's cut-off, but also it's almost axiomatic that the mics which yield subsonic "whoomp" problems will be automatically subject to high-pass filtering in the house system anyway.

             

            Not only that, the sources that provide real bass for music are very often D.I.'d and in any case, any deep "whoomp" problems from such sources that may be miked are very easy to identify and correct by ear.

             

            As for range, I feel that the external "rubber duckie" antennae of the 55's are likely to yield significantly more usable range than those built into the 35's, if only by virtue of easier re-positioning, regardless of the published specifications' claimed deficit of a mere 15 feet.

              • RonMarton Iknowathingortwo 357 posts since
                Jan 12, 2012
                Currently Being Moderated
                Sep 14, 2012 1:08 AM (in response to kempor)
                Re: XD-V35 High pass filter

                First off, my friend...

                 

                Your writing is better than many native English-speakers can manage!  If you don't believe me, just browse around these discussions.

                 

                Second. I've been very happy with the results I've had from Lectrosonics since the late 1980's, even more so since the release of their gunmetal SM and HM range and I thank you very much for alerting me to their TM system.

                 

                (Like you, however, there's no way I can afford to buy them for myself, ...but I'm very lucky to still be able to use their beltpacks and handmic "butt plugs" at various times when I work in various better-funded set-ups.)

                 

                To the matter at hand: ...as you say, the XD-V55 is definitely the minimum you'll need to pass the bandwidth required for the evaluation of crossover, intermodulation, standing-wave and diffraction artefacts.

                 

                Incidentally, while the M30's 9Hz-30kHz response may not seem to be needed when considering fundamental frequencies, it is nevertheless nice to know that upper and lower harmonics won't be attenuated when trying for full spectrum analysis.

                 

                I guess the only decision left is whether to spend the price of a second Earthworks M30 for the additional antenna-splitting and other features of the (one-third more expensive) XD-V75.

                 

                It seems to me the main deciding factors would be whether or not you

                 

                1. May also use it as a conventional wireless system and/or
                2. May find antenna distribution handy

                 

                ...either now, or in the future.

                 

                It seems to me that if either of the above applies, the extra money would be a good investment.

                 

                Either way, you may find my review of Gator's relatively cheap GM-1WEVA case handy when thinking about how you'll be carrying your M30 measurement kit.

                 

                http://www.sweetwater.com/store/detail/GM1WEVA/reviews

                 

                and you'll also be needing something like this:

                 

                http://www.sweetwater.com/store/detail/WA310/

                  • RonMarton Iknowathingortwo 357 posts since
                    Jan 12, 2012
                    Currently Being Moderated
                    Sep 14, 2012 3:27 PM (in response to kempor)
                    Re: XD-V35 High pass filter

                    Just for your information...

                     

                    I am not associated with Line 6 (or any other company), nor do I have particular loyalties to any companies. (Click on the pink avatar at left for details of my location equipment.)

                     

                    Knowing that may help you to judge the value of my opinion, which is that my XD-V70/75 equipment (which I actually bought with my hard-earned cash) gives me the most transparent wireless transmission that I have ever experienced.

                     

                    As do the Lectrosonics SM/HM/Venue/SR and AKG DMS 70/700 systems...

                     

                    ...HOWEVER...

                     

                    As much as I love the vocal sound from AKG's D5 capsule, configuring either of the brands above to approach (but not equal) the level of features and flexibility built into Line 6's XD-V75 costs between three and FIVE times as much.

                     

                    The Shure PGX, while promising much, sounds really nasty to my old ears.

                     

                    I hope this helps.

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