Thanks! Good piece of info!
Btw, "You can raise the input gain by modification as discussed above" - which thread # are you referring to? The max input gain I can have is -31db, seems like I've to solder the internal gain jumper.
Another way is to set gain in the filter designs? I might be able to increase the SUB output gains of the pre-amp.
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Shameless plug if anyone is after one, mine is on the classifieds:
https://www.diyaudio.com/forums/swap-meet/355109-fs-hypex-fusion-fa253-plate-amp-plus-remote-kit.html#post6219408
https://www.diyaudio.com/forums/swap-meet/355109-fs-hypex-fusion-fa253-plate-amp-plus-remote-kit.html#post6219408
Hello,
Does anyone know if the FIR function is functional?
The manual says:
Dac filter settings As of firmware version 1.3, it is possible to control the internal filters of the DAC. Please refer to the datasheet of the AK4454 for more information. You can change its filter type, sound quality (1..3) and FIR settings (0..7).
I played with the settings and made many measurements, but apparently this function does nothing.
What do I miss?
Does anyone know if the FIR function is functional?
The manual says:
Dac filter settings As of firmware version 1.3, it is possible to control the internal filters of the DAC. Please refer to the datasheet of the AK4454 for more information. You can change its filter type, sound quality (1..3) and FIR settings (0..7).
I played with the settings and made many measurements, but apparently this function does nothing.
What do I miss?
What did you expect to measure? The configurations work, but only fine tune the DAC. So the impact of changing it is very minor.
Fedde
I meant earlier in this thread. You can find the procedure to raise input gain in the Fusion manual. It is best to raise the input level in preamp, but if this not further possible you can mod the plate amp for a bit more gain.
Fedde
Did anyone do experiments with the speaker output cabling with Fusion amps? I still use the original cabling at full length. Is it worth the effort/cost to replace this or shorten it? Does it help to braid it? I think I read somewhere that the Ncore is sensitivity to output wire topology, especially close to the PCB.
Fedde
Fedde
The cables from the PCB need to be symmetrically twisted minimizing any loops that act as antennas. Once you are away from the vicinity of the PCB, topology doesn't matter.
I never experimented, ditched the copper right away and replaced it with silver plated copper with teflon.
Yeah boy! Time to revisit the manual!
However, from my brief experiences, it was impossible to ensure that the active Fusion input to nearly saturated at max input signal via analogue inputs, even hardwired the internal jumpers.
Anyway, time to fine tune the settings after a year.
Don't why! Can't edit my post!
OK, page 17 of the fusion manual, not HFD.
And, I should have read the post carefully!
"Page 17 of the user manual shows how to set increase the gains."
i.e. the jumper setting on the plate amp
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It's in the data sheets. Always best to verify for yourself before you hook up.Hi amigos,
I am new in Hypex world...
Need help please. Can you say if my below picture for my Hypex NC250MP is right ? I just need to connect a RCA connector :
However Hypex recommends that the negative side be connected to ground at the RCA end also.
Daniboun,
Yes that is correct. That was the method Hypex recommended originally and to my knowledge it hasn't changed.
Others are welcome to correct me if I am wrong.
Apparently having the negative lead stretched out with the hot helps with interference rejection. Make sure they are twisted also.
The better option is to use an XLR connector on the chassis and then make an RCA to XLR adapter. Then if you get a balanced source you don't have to change the amp.
Yes that is correct. That was the method Hypex recommended originally and to my knowledge it hasn't changed.
Others are welcome to correct me if I am wrong.
Apparently having the negative lead stretched out with the hot helps with interference rejection. Make sure they are twisted also.
The better option is to use an XLR connector on the chassis and then make an RCA to XLR adapter. Then if you get a balanced source you don't have to change the amp.
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Can you explain please ? You mean that using NC250MP with unbalance input (RCA vs XLR) may cause "POP" @ startup ??
I would follow the advice of Bruno to not waste a differential input by using a non XLR input. The ground connection should be at source side, not in the amp. And it is easy to solder a RCA to XLR cable...
(Or use a differential source)
Fedde
Thanks amigo for helping )
Last question :
What is the diameter of the pins on the Hypex Ncore IDC connectors?
Can I use a Pin by Pin Dupont style connector, like this :
