Yes. If the NC100 (tweeter channel) is no longer needed, set the gain to the lowest value possible, which I believe is -144 dB. Since you no longer require any DSP function, you should remove all filters from the two NC250 channels. Then add a single unity filter to each NC250. This will give you two full range channels with no EQ.
Purifi is really great, but as per Benchmark, the NC400 seems to be a best value for the moment.
In my opinion, the best choice regarding the performance / price ratio is the NC250MP, I get them @ 125$ / board. No need to spend too much for a great DIY Ncore.
Most major brands sell their dual Mono NC250 more than $800, it's crazy !!!
You can get a Purifi finished amp (2x400W) for 1350 euros. This is the best price I saw.
Last edited:
Check audiophonics NC252 build, not a bad price imo:
AUDIOPHONICS MPA-S250NC RCA Class D Stereo Amplifier Ncore 2x250W 4 Ohm - Audiophonics
AUDIOPHONICS MPA-S250NC RCA Class D Stereo Amplifier Ncore 2x250W 4 Ohm - Audiophonics
Last edited:
Audiophonics is a great dealer in France, they propose the best priced Ncore amplifiers. I would go for a double mono Ncore NC250MP instead (my point of view).
The choice is given, but the price is almost double for 2 monoblocks.
Edit: more like 1.5x price, after all, it's not bad.
Last edited:
You re right.... Major brands, as already said, are selling double Mono Ncore @ more than $800 ! I am used to pay about $125 for a Mono NC250MP, so $250 for a double Mono Ncore ! that is a bargain for me
Hi Folks,
There was a question in Jan 2019 asking if someone had already come up with a display of the preset and/or source and/or level for the Fusion amps.
Before getting my hands dirty on that (mainly for the preset as far as I am concerned), did someone already try something since then ? (I would guess through I2C)
There was a question in Jan 2019 asking if someone had already come up with a display of the preset and/or source and/or level for the Fusion amps.
Before getting my hands dirty on that (mainly for the preset as far as I am concerned), did someone already try something since then ? (I would guess through I2C)
I've been thinking of gutting my FA253's and reuse the amp modules (basically build an Apollon) and use it in connection with a minidsp 2x4hd for much the same reason.
It seems perfectly doable but it would be interesting to hear from somebody who has tried something similar.
Yes, it would solve many problems for me. The fusion would have worked if it wasn't for the inability to manage phase as my mid driver drifts to 90degrees out by the frequency I would like to cross over at. Add this to the phase changes of a 4th order LR crossover, and the crossover doesn't work. I don't want to EQ it up, as off axis it may be more in phase and hence louder.
If you have phase problem between your drivers, then there is either frequency response or timing problems or both. Both can be fixed within HFD, and if you solve the those two aspect then the phase problems is solved.
Or did I miss something?
Of course there is only limited slopes which works as in-phase crossovers and flat frequency response with IIR or analogue filters, these are the Linkwitz-Riley slopes.
Last edited:
The driver rises in phase as the frequency lowers
Here is the raw driver on the horn with no crossover etc
Desired crossover point is 500hz to bass driver.
2452H + JMLC 350hz RAW phase.jpg - Google Drive