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Vifa XT25TG30-04 vs XT25BG60-04 measurements

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  • #16
    Re: Vifa XT25TG30-04 vs XT25BG60-04 measurements

    Originally posted by fastbike1 View Post
    Accept my apologies.
    accepted
    craigk

    " Voicing is often the term used for band aids to cover for initial design/planning errors " - Pallas

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    • #17
      Re: Vifa XT25TG30-04 vs XT25BG60-04 measurements

      Originally posted by fatmarley View Post
      I wonder how the Scanspeak R2604/832000 compares?
      XT25TG30-04 datasheet from 2014-10-11 shows the Sd to be 8.2cm2, Xmax 0.5mm (+/-0.25mm?) and fs 436Hz, while the R2604/832000 datasheet lists its Sd as 5.4cm2, Xmax as +/-0.2mm, and fs as 500Hz.

      XT25BG60-04 datasheet from 2009-11-06 specifies Sd as 8.2cm2, Xmax as 0.4mm (+/-0.2mm?), and fs as 589Hz. R2604/833000 shows Sd as 5.4cm2, Xmax as +/-0.2mm, and fs as 440Hz.

      Do the differences in effective diaphragm diameter mean that Scan-Speak's tweaks are kinda big, or are the differences down to how Tymphany and Scan-Speak measure?

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      • #18
        Re: Vifa XT25TG30-04 vs XT25BG60-04 measurements

        Trust the scanspeak data. I calculated SD for my 25tg myself and came up with about 5.5 cm2.
        Audio: Media PC -> Sabre ESS 9023 DAC -> Behringer EP2500 -> (insert speakers of the moment)
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        • #19
          Re: Vifa XT25TG30-04 vs XT25BG60-04 measurements

          Your experience is helpful, thanks!

          Next question is whether similar discrepancies are limited to the ring radiator tweeters, or whether it is prudent to take all of Tymphany's datasheet parameters with a grain of salt.

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          • #20
            No marketing scheming here, the diaphragms are identical, just different and consistent methods of measurement.

            Of course, it would help if all manufacturers would show how they measure on their spec sheets.

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            • #21
              The extra sensitivity of the "60" version is helpful in speakers with overall higher sensitivities.
              Not so much that it has more output at one watt, but in that the extra output can be padded "Down" a bit more with a series resistor, to keep the overall tweeter impedance out of the really low territory that the "30" version dips into when not padded down much.

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