You can do some more checks if you do some new measurements in the second channel and see if the error is constant.
I played a bit more with this, at 96khz, waiting a few minutes between measurements, redoing only one channel. The error is either small (about 10µs delay) or absolutely 0 (perfect overlap of the impulses).
Asio4all gives me the same behavior. Somewhat random results, either no delay or a 10µs one. That's weird. I also noticed that HFD will output completely off results if I click to soon on "sum" after taking a measurement.
I wish HFD provided the option to autocalibrate in real time by using a loopback on a second channel. Iirc, there was a logiciel (not a freeware) that did that but the name escapes me.
I wish HFD provided the option to autocalibrate in real time by using a loopback on a second channel. Iirc, there was a logiciel (not a freeware) that did that but the name escapes me.
Hi Danner, Nice work. There is an error on HFD User Guide regarding LR filters which you have copied. LR2 filter has Q=0.5, an LR4 filter also has Q=0.5 and is made by adding 2 Second Order filters with Q=0.7 (butterworth). Hypex have acknowledged the error but not corrected it yet.
Ref: Linkwitz–Riley filter - Wikipedia
LR filters with time aligned drivers is a great way to start with most speakers in my opinion.
Regards
Colin
Ref: Linkwitz–Riley filter - Wikipedia
LR filters with time aligned drivers is a great way to start with most speakers in my opinion.
Regards
Colin
Been away from base for a few days so will have to catch up with the all the info on setting up the Fusion amps / speakers. Many thanks to all for their input.
I unfortunately have recently purchased a Focusrite 2i2 and a mike pre amp totally unaware of the technical issues that produce timing errors. A waste of money making the fusion project more expensive.
I also have more work to do on the environment I have to use to correctly align the filter to a 3 way loudspeaker. How can existing users have completed this other than in Free space or an Anechoic chamber ? How do you get rid of reflections ?
I have still to look at the full tech spec of the fusion system to try and evaluate the performance of the DAC and at least compare the parameters against my current DAC.
I am also concerned about the A to D conversion of any analogue signals and what effect that may have on signal quality. I use a lot of vinyl as source material from a high quality system.
My reaction to my position is to wait until @ ds23man produces his official line up procedure in the next few months and make sure I am comfortable with my areas of concern before ordering an amp unit.
I unfortunately have recently purchased a Focusrite 2i2 and a mike pre amp totally unaware of the technical issues that produce timing errors. A waste of money making the fusion project more expensive.
I also have more work to do on the environment I have to use to correctly align the filter to a 3 way loudspeaker. How can existing users have completed this other than in Free space or an Anechoic chamber ? How do you get rid of reflections ?
I have still to look at the full tech spec of the fusion system to try and evaluate the performance of the DAC and at least compare the parameters against my current DAC.
I am also concerned about the A to D conversion of any analogue signals and what effect that may have on signal quality. I use a lot of vinyl as source material from a high quality system.
My reaction to my position is to wait until @ ds23man produces his official line up procedure in the next few months and make sure I am comfortable with my areas of concern before ordering an amp unit.
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Whats the connection will look like?
Fusion - usb - laptop
UMC22 - usb - laptop
UMC22 - analog into fusion
Is this correct?
Im getting very low volume on fusion 253, set the output at 125w, 50w and 50w. Gain at 0, UM22 at max volume and it didnt have enough volume to get good measurements. Any ideas?
I tested the um22 on audirvana and it gives normal volume.
I also tested the fusion with my speakers on audirvana (playing music on the midrange), it gives plenty of output...
The UM22 outputs max 0 dBu (0.775 V), see https://www.strumentimusicali.net/manuali/BEHRINGER_UMCSERIES_ENG.pdf .
The Fusion amp needs 18 dBu (6.15 V) on the XLR input and 9 dBu (2.18V) on the RCA input for full power. If you're using the XLR inputs, you can try using the RCA inputs or increase the Fusion amp gain with the jumper described on page 17 of the manual. It looks like you'll need to do both (RCA @ 2dBu / 0.98V) if you want more power from the fusion amp. Or use a preamp.
The Fusion amp needs 18 dBu (6.15 V) on the XLR input and 9 dBu (2.18V) on the RCA input for full power. If you're using the XLR inputs, you can try using the RCA inputs or increase the Fusion amp gain with the jumper described on page 17 of the manual. It looks like you'll need to do both (RCA @ 2dBu / 0.98V) if you want more power from the fusion amp. Or use a preamp.
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Thanks mspijker, i only have gain problem while measuring with HFD.
I got sufficient gain with normal playback though. Im wondering whats the problem here.
Henry, I just ordered a pair of FA123s and a UMC22 but they haven't arrived yet. So I'm not writing from experience, just reading specs. 🙂 How did you hook up the UM22 to the Fusion amps? What connection do you use for normal playback? Maybe ds23man has some good tips wrt HFD.
Laptop - usb - UM22
Um22 - XLR - Fusion
Laptop - usb - Fusion
Normal playback is
Laptop - usb - um22
Um22 - xlr - fusion