Fosi M03 / Aiyima 3001 / Nobsound G2 Pro mono sub amp review

[JohnnyAudio]

I have a dual voice coil sub. If I use 2 amps, one for each voice coil, do I get more DB from the speaker?

 

[Franzois]

Thanks for the review!

I just got the Nobsound/Douk version.

The board layout is noticably different and, most importantly, the main capacitors are rated for 25V and the provided power supply is 19V 5A.
You can't use a beefier power supply with this one.

Even though it is cheaper, I'll return the Douk and get a Fosi.

Cheers

 

[gaussianmist]

Thanks for the review!

I just got the Nobsound/Douk version.

The board layout is noticably different and, most importantly, the main capacitors are rated for 25V and the provided power supply is 19V 5A.
You can't use a beefier power supply with this one.

Even though it is cheaper, I'll return the Douk and get a Fosi.

Cheers

Could you have purchased the G2 rather than the G2 PRO?

 

[gaussianmist]

From the Nobsound Manufacturer:
Packing List

• 1* G2 PRO Mono Power Amplifier
• 1* 32V/5A Power Supply

 

[Franzois]

Could you have purchased the G2 rather than the G2 PRO?

Yes, you're right. I didn't even imagine that they could sell 2 slightly different models (!).

Could anyone confirm that the Nobsound G2 Pro is exactly the same as the Fosi tested here (modulo the gain switches)?

Thanks.

 

[gaussianmist]

Yes, you're right. I didn't even imagine that they could sell 2 slightly different models (!).

Could anyone confirm that the Nobsound G2 Pro is exactly the same as the Fosi tested here (modulo the gain switches)?

Thanks.

I'M getting my Nobsound G2 Pro today. It was on sale at Amazon for about
$68.

 

[Franzois]

I'M getting my Nobsound G2 Pro today. It was on sale at Amazon for about
$68.

I'll wait for your input then.

 

[gaussianmist]

I'll wait for your input then.

I guess the weather has been a factor as I still haven't received the Nobsound from Amazon. I see that the Aiyama is available at Ali Express for about $54 (including shipping) with the 32 volt PS.

 

[gaussianmist]

I'll wait for your input then.

I got my Nobsound yesterday and the only differences among the 3 that I can see are the gain switches which are very accessible at the bottom of the unit and (from the manual) low pass ranges from 40-300 Hz. Also, the bass frequency and volume control knobs are click-type making it easier to regain your setting if accidentally changed. I'm using the unit to replace the subwoofer amp (which failed) in my Def Tech STS loudspeaker. I re-wired the STS making it a fully passive speaker and am using REW to finesse the Nobsound settings.

 

[Franzois]

Following your advice, I bought the Aiyima which was significantly cheaper on AE with the 36V PSU than the Nobsound one (~50 vs 75€). Actually, I may just use the board in my velodyne CHTR sub, since the high-pass line output still seems to work (the power amp of the board is dead). My only problem will be to find a way to put the Aiyima board on the heatsink of the sub.

 

[gaussianmist]

Following your advice, I bought the Aiyima which was significantly cheaper on AE with the 36V PSU than the Nobsound one (~50 vs 75€). Actually, I may just use the board in my velodyne CHTR sub, since the high-pass line output still seems to work (the power amp of the board is dead). My only problem will be to find a way to put the Aiyima board on the heatsink of the sub.

Make sure that it's not the JUNIOR Aiyima.

 

[Ale10]

Hi all,

do you think one of these Amplifier is good to move a subwoofer Ciare CS253 (200w RMS 2ohm, but it can play also at 100w RMS 4ohm). Thank you.

 

[JohnnyAudio]

Yes, I use similar FOSI M-03 with CSS SDX12 - 12" XBL^2 Subwoofer and it sound good. It does not sound overpowered like many subs do.

​

 

[theREALdotnet]

do you think one of these Amplifier is good to move a subwoofer Ciare CS253 (200w RMS 2ohm, but it can play also at 100w RMS 4ohm). Thank you.

It depends, 2 ohms is probably too much to ask but 4 ohms should be fine. Also, what's expected from the subwoofer? Is it meant to shake a large home theatre, or is its job filling in the bottom end of a stand-mount stereo setup?

 

[Ale10]

Thanks for the replies.

The subwoofer is going to help a pair of Lonpoo LP42s that I have on my desk. The speakers are decent for what they cost, but they are practically absent in the bass and unbalanced in the highs. I had this Ciare subwoofer that was mounted on my car many years ago, and so I thought I would give it a new life. The subwoofer is a double voice coil with 200W RMS at 2 ohms, but since I don't need all the power I disconnected a voice coil to make it go to 100W RMS at 4 ohms.

In the end I bought the Aiyima A3001 and the situation improved a lot. It's definitely not a HiFi configuration, but now I have more presence in the low-mid range. No power problems since I have to keep the amplifier volume at less than half.

Thanks again for the help