New Eversolo DMP-A10 Music Streamer

Also, if the All pass Filter (APF) is the same on both main and subs, it will have no effect.
Currently I'm using a minidsp Flex (USB in from DMP-A6) and the Flex 4 outputs to L/R (power amp) /Sub L/Sub R (sub line in).
The APF was very useful in getting rid of a large 43hz dip where the mains and sub cancel.
The APF set to 43hz on left/right mains and a Q of 10 completely eliminated the dip.
Would be great if I could replace the minidsp with the A10 !

 

Hi. DSP is for analog output, while EQ is for digital output such as optical/coaxial and USB DAC. It is not effective for the bass port.

 

In that case , the ONLY suitable solution is an ACTIVE subwoofer with its own LPF / HPF.
That is: You EQ in the digital domain, then you flush the output directly to the sub, and from it to your speakers. The sub will take care (through its HPF / LPF) of what stays within it, and what passes through to the L / R channels.

If you use 2 subs, it's just the same: only send the R channel to the R sub, and the L one to the L sub. You're well done in a matter of 20 minutes.

As a rule of thumb:

sub: 0 - 120 Hz
speakers: 80 - infinity

Then, you can play with the sub's 120: making it lower, say to 80... and the speakers' 80, making it lower too, shall they respond good starting at, say, 60.
Although, LF below 100 / 120 Hz begin to be origin-indistiguishable, therefore without need to be treated / sent to the L / R channels in the first place.

In the end:
- Your experience is chief.
- YMMV


HTH
Cheers, Al.

 

By global EQ I mean on the ANALOG outputs not digital (never asked about digital).

I gather from all this the following:
The DSP (PEQ etc.) is before the DAC and there are not separate DAC outputs for L-R-Sub1-Sub2.
The control of the sub outputs low pass filter is somehow separate or even in the analog domain.
perhaps the resistor ladder volume control is just 2 Channel and the sub(s) output is somehow taken from that ?

Would make more sense to have 4 DAC outputs with DSP control of each channel.

 

Hi. Each channel has DSP control: the LR output by the ES9039PRO, while Sub1 and Sub2 have DAC outputs inside the DSP.

 

So Sub outputs do not go thru the relay based R-R volume control then ?
I recall you are using this DSP chip https://www.akm.com/global/en/products/audio-voice-dsp/lineup-audio-voice-processor/ak7739vq/
Also if the Sub outputs are from DAC's onboard the DSP chip, why not give them DSP capabilities (PEQ etc.) other than basic low pass filters.

 

1. Yes, they don't.
2. The AK7739 provides DAC outputs inside.
3. While Subwoofer participates in room calibration, the FIR will also correct the PEQ of basic low pass filters.

 

Why not go all the way and make PEQ spearate for the sub outputs ?

With my current minidsp Flex setup, I use PEQ on both main speakers (run full range) and the 2 sub outputs Low pass in the minidsp.
The L-R outputs have two PEQ filters. One for an upper bass attenuation (115hz left and 147hz right) and one All Pass Filter @43hz (same L & R) to correct a bass null between main & Sub.
The sub outputs have a similar setup except one boost at 69hz and another APF at just above the sub crossover.
The sub DSP/filters can now be turned off and the more powerful minidsp does the work

This has allowed me to now get the best bass to match my "house curve" after over 8 months of playing around.
I don't care about and would never use any auto room calibration as I can do this manually with better results.

Unfortunately I had to take my high quality relay controlled R-R stereo preamp out and let the minidsp change volume.
Although the bass is good now, the rest of the spectrum is a bit lacking.

Would be great to upgrade to the A-10 but maybe I'm asking too much ?

Let me know if things change ?
Thanks

 

Any change to the A-10 Sub outputs since i posted this in July ?

 

This is how you set it up and it sweeps the bass.

 

In your room. With your music. To your like.
In other words: thus could not work for others the same way it does for you.

 

This is obvious. The DMP-A10 offers extensive and individual adjustments, allowing every audiophile to fine-tune their system to their individual needs. A piano always tunes itself in a given room.
I merely demonstrated the device's operating principles and phenomenal capabilities for individually optimizing the final soundstage as a guide for those interested.

 

Agree

 

"Very good vocals and midrange, but I'm only missing the low and high frequencies. I'm probably just old and deaf."

Most of us are simply deaf from birth. I find these puritanical tests with only the mandatory Source Direct option turned on amusing. You all forget about the physiology of human hearing.

That's how the creator designed it. That's why physiological correction in audio was invented. Turn on the manual equalization in the DMP-A10, as I show in the photos, and when you listen to your system afterward, your jaw will drop in amazement.

 

"Very good vocals and midrange, but I'm only missing the low and high frequencies. I'm probably just old and deaf." --

Most of us are simply deaf from birth. I find these puritanical tests with only the mandatory Source Direct option turned on amusing. You all forget about the physiology of human hearing.

That's how the creator designed it. That's why physiological correction in audio was invented. Turn on the manual equalization in the DMP-A10, as I show in the photos, and when you listen to your system afterward, your jaw will drop in amazement.

 

If these settings don't satisfy you, you can amplify the frequency extremes and adjust them to your hearing. EverSolo engineers designed this to ensure everyone can find their own sound.
Hats off to them for that.

 

Even a broken clock tells the right time twice a day.

 

Even few audiophiles will eat unsalted fries. You can't claim you don't salt fries because they're so natural (because they're unsalted)
--- a Source Direct potato

 

If the recipe from the chef is intended to be eaten without salt, you do not put salt. otherwise you are adulterating the master / mixing. This is a more correct analogy.

 

Salt is a taste trigger, even in exquisite dishes. The same applies to the physiological correction of hearing in the artistic transmission of music. And if you simply can't hear something, then no "potato Source Direct" theory will help you fully appreciate the beauty of Art.
This is the most apt analogy.