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Toku in the first page of the thread explains this.
Today I plugged in and tested a 3rd OS for the Raspberry PI 4 with Volumio 2022, and still no problem with the Xmos.
snake69fast
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Only Pi Zero 2W has this problem. I think it is something related with the microUSB of the Pi Zero 2W. I used later the same microSD (picoreplayer) card in a Pi 4 with no problems. I will check again with a powered USB hub for the Pi Zero 2W and come back here with the result.
Regarding the menu that is activated on the A30a (not the remote control), I had written that you had to use a button on the remote to return to the main display, I found by chance (not in the manual , it's time to start providing real manuals) if you press the amp button for 2 seconds, the menu closes...so the long press allows you to leave a submenu and the main display, to close the amp.
@peterwen
is there anyway we can get the company to fix the firmware on the sub output? like others 70hz is way too high for me. my bookshelf speakers are flat to 50hz. so even though this is much nicer generally than my smsl sa300 its a big downgrade as it guts the low end response on the speakers.
simply having an option to run the sub out full range and use the sub crossover would fix the issue.
since this is all software, there’s no reason it shouldn’t have a fully variable crossover with variable slope (and powerful geq) but I would be happy with just being able to run it down to say 40 Hz or just turned the crossover off entirely and let everything run full range
is there anyway we can get the company to fix the firmware on the sub output? like others 70hz is way too high for me. my bookshelf speakers are flat to 50hz. so even though this is much nicer generally than my smsl sa300 its a big downgrade as it guts the low end response on the speakers.
simply having an option to run the sub out full range and use the sub crossover would fix the issue.
since this is all software, there’s no reason it shouldn’t have a fully variable crossover with variable slope (and powerful geq) but I would be happy with just being able to run it down to say 40 Hz or just turned the crossover off entirely and let everything run full range
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Kyivan Rus
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I apologize, I’m new and a complete novice…. What is the point of this amp with a THD of 10% at rated power output, as per its manufacturer mentioned on page 1 of this thread? What am I missing? Thanks.
yes this is a point of contention here and with just about every chinese manufacturer
if this thing does 100w at 8 ohm at 10% we might assume it does anywhere from 70-80w at realistic thd, say 0.01%?
is that a fair assumption? if that is acceptable for you at the price then you know where to go
i get it though.... one of the amps i own is by a Harman company... the only figure it gives is 65w at 6 ohm at 1% so its not like the chinese have a monopoly on goofy figures... they're just egregrious at it...
if this thing does 100w at 8 ohm at 10% we might assume it does anywhere from 70-80w at realistic thd, say 0.01%?
is that a fair assumption? if that is acceptable for you at the price then you know where to go
i get it though.... one of the amps i own is by a Harman company... the only figure it gives is 65w at 6 ohm at 1% so its not like the chinese have a monopoly on goofy figures... they're just egregrious at it...
Welcome, the short answer is that the industry will often specify watt at 1% or 10% typically at 4 ohm. It can be plotted on a graph like below link. Obviously we are more interested in the good performance of an amp. Usually there is a sweet spot.
Understanding THD+N Charts
Hi all, trying to understand thd+n charts. Pl. take a look at following. (Charts are from audio poland website of Denon and Emotiva amplifiers) Am curious why some charts starts (0 or 0.1 Pout) higher and some lower. Is it because of Noise measurements are combined with THD measuremens ? what...
www.audiosciencereview.com
Also, remember that the effect you get from an amp highly depends on the impedance profile (another graph) of your speaker and the sensitivity of your speakers.
Kyivan Rus
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Welcome, the short answer is that the industry will often specify watt at 1% or 10% typically at 4 ohm. It can be plotted on a graph like below link. Obviously we are more interested in the good performance of an amp. Usually there is a sweet spot.
Understanding THD+N Charts
Hi all, trying to understand thd+n charts. Pl. take a look at following. (Charts are from audio poland website of Denon and Emotiva amplifiers) Am curious why some charts starts (0 or 0.1 Pout) higher and some lower. Is it because of Noise measurements are combined with THD measuremens ? what...
Also, remember that the effect you get from an amp highly depends on the impedance profile (another graph) of your speaker and the sensitivity of your speakers.
Thank you!! Will read up!
MidnightCarouselRider
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Where did you get that?
From Amazon it's the "mxuteuk" knob comes in a few colors. Since it has a set screw it fits a little nicer than stock and imo makes the flashy gold plate less out of place
Now if only we could swap that logo with a vu meter...
GiBo61
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After about a month and a half of playing with the Sabaj A30a I can say that it is one of those things in my life with which I have a positive feeling. It's solid, discreet, does what it's supposed to do without too many frills, it's a real pleasure to use it every day.
LennyTheLion
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@peterwen
As a recent owner of this neat little amp, there are a couple of items that I'd like to suggest for consideration in a future firmware update:
1) Speaker left / right balance adjustment
2) Addional subwoofer LFE Cross over frequency selections (e.g 50 & 60Hz). The current 70Hz minimum selection is a little high.
I,m currently enjoying re discovering my music collection through this amp
As a recent owner of this neat little amp, there are a couple of items that I'd like to suggest for consideration in a future firmware update:
1) Speaker left / right balance adjustment
2) Addional subwoofer LFE Cross over frequency selections (e.g 50 & 60Hz). The current 70Hz minimum selection is a little high.
I,m currently enjoying re discovering my music collection through this amp
It's weird this day and age that any amplike this doesn't have an independent crossover with fully variable slope for each channel and 5-10 peq bands - I mean, car audio stuff had that in their cheap head units 20 years ago.@peterwen
As a recent owner of this neat little amp, there are a couple of items that I'd like to suggest for consideration in a future firmware update:
1) Speaker left / right balance adjustment
2) Addional subwoofer LFE Cross over frequency selections (e.g 50 & 60Hz). The current 70Hz minimum selection is a little high.
I,m currently enjoying re discovering my music collection through this amp
Car audio is ahead of home audio in some ways. Class D, active EQ, 2 Ohms drive etc.
Guilherme_BR
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Is it possible to drive a passive Subwoofer with the sabaj a30a? Amp -> Passive SW -> Speakers ? Thanks
Hi. Is this knob metal or coated plastic? Thanks
Aluminum
No.
It absolutely takes an amplifier at the sub output of the A30a. You can add an amp to the sub output to the passive speaker.
An example of an amplifier you can use. The a10a can be bridged for doubled mono output and to connect at the passive SW.
Sabaj A10A 2022‘v Power Amplifier 225W
Sabaj A10A 2022‘v Power Amplifier Germany Infineon's latest digital high-power amplifier chip has higher quality, high efficiency and low energy consumption; Bluetooth 5.0 reception, longer transmission distance, better sound quality! It can be bridged (BTL) into a single-channel amplifier with...
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