Do you have the specs of those speakers?
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Emotiva MC-1 Review (Home Theater Processor)
- Thread starter amirm
- Start date
Do you have the specs of those speakers?
Doubt that, more like 30hz-35hz
Can you do frequency response to see actual responses
No +/- figure on that FR so probably not that low.
Ie standmount speakers are 20hz-20khz +/- 30db
Plot a response to get a idea what you are really gettingm
Stanny1
New Member
I didn't see my Outlaw 975 on the chart.
I have few sets of 5.1 speakers at home. I switched to slightly more efficient Yamaha ns 777 and ns555 towers for surround sides and back speakers. I have reset the crossover to between 60hz to 80hz. I also have infinity cascade 5.1 speakers in a storage room.. I may try them later but the infinity speakers are less efficient.
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I was wonder if it's reasonable to hack it and improve it's performance, as it should be do-able.
Since Emotiva MC-1 has a lot of similarity to Tonewinner AT-300, and AT-300 also shares it's core board to other line of product,
I was able to find the diagrams of AT-2300, and it shows signal path was transmitted from ADSP-21753 into CS42518 via I2S.
CS42518 being a multi-purpose codec, might be one of culprit this machine performs not as expected (along with basic power supply and reasons).
▼ Diagrams of AT-2300 audio path (Original page)
But since the DSP is outputting I2S signal, and the pinout easily tracked thanks to the datasheet, we could tap out the signal and hook up to external DAC for better quality,
say ES9038Q2M DIY HAT kit to make everything internal, and with reclock buffer in between to reduce jitter (FIFO Reclock),
though everything will still be resampled to 48KHz as the DSP is programmed that way,
We can even hook up to external DSP eg. ADAU1701 via I2S, to digitally EQ and distribute, say 4 subwoofer outputs.
▼ Dual ES9038Q2M balanced output kit using I2S input
The only thing I'm concerning with this hack is, at the near end of diagrams, there's NJU72340A whose job is volume control, and I'm not sure if it interact with TRIM feature or just master volume or even just mixing, so you might need to route the output back into the circuit, requiring some scary bit of cutting circuit and such.
Hence the title of my question, is it reasonable to do this hack if I want to improve the performance of this machine?
Since Emotiva MC-1 has a lot of similarity to Tonewinner AT-300, and AT-300 also shares it's core board to other line of product,
I was able to find the diagrams of AT-2300, and it shows signal path was transmitted from ADSP-21753 into CS42518 via I2S.
CS42518 being a multi-purpose codec, might be one of culprit this machine performs not as expected (along with basic power supply and reasons).
▼ Diagrams of AT-2300 audio path (Original page)
But since the DSP is outputting I2S signal, and the pinout easily tracked thanks to the datasheet, we could tap out the signal and hook up to external DAC for better quality,
say ES9038Q2M DIY HAT kit to make everything internal, and with reclock buffer in between to reduce jitter (FIFO Reclock),
though everything will still be resampled to 48KHz as the DSP is programmed that way,
We can even hook up to external DSP eg. ADAU1701 via I2S, to digitally EQ and distribute, say 4 subwoofer outputs.
▼ Dual ES9038Q2M balanced output kit using I2S input
The only thing I'm concerning with this hack is, at the near end of diagrams, there's NJU72340A whose job is volume control, and I'm not sure if it interact with TRIM feature or just master volume or even just mixing, so you might need to route the output back into the circuit, requiring some scary bit of cutting circuit and such.
Hence the title of my question, is it reasonable to do this hack if I want to improve the performance of this machine?
I wouldn't. If it bricks the unit, then what?
Only if you’re desperate
It’s a lot of hassle and a big gamble. Ideally you would tap the I2C from the volume control and convert that to volume control commands from the ESS board. That way you can bypass the whole section.
