[landaemon]

Hi, I have this DIY AMP sitting in my drawer. Its unused due to it being high ohm version plus I have no high quality PSU for it. I was wondering if its worth anything/ if its good. Is there any point in getting proper PSU for it?

 

[landaemon]

I should mention that I own no high Ohm headphones, would it be worth it to convert it to low Ohm version?

 

[HiGHFLYiN9]

The link just takes you to the Aliexpress front page.

 

[AudioCats]

since the amp kit is already there and seems to be easy to build, might as well finish it.... just use any 19v laptop power supply to provide power.

it is opamp based, there is probably not much difference between high/low ohm mode anyway.

 

[tomb]

The link just takes you to the Aliexpress front page.

Ditto - might as well be a link to a virus, IMHO. I doubt the kit is worth putting together if it came from Aliexpress. The lack of a PSU is a long-standing trick in selling amplifiers and DACs on ebay, ali, etc., etc. The PSU might as well be the most important section on an amplifier (or DAC, etc.).

 

[sl418]

Hi, I have this DIY AMP sitting in my drawer. Its unused due to it being high ohm version plus I have no high quality PSU for it. I was wondering if its worth anything/ if its good. Is there any point in getting proper PSU for it?

 

[sl418]

Can you update the link to the amp? Thanks.

 

[landaemon]

Can you update the link to the amp? Thanks.

https://www.aliexpress.com/item/32812050441.html?spm=a2g0o.productlist.0.0.54c31e23dMeQtH&algo_pvid=475dc49c-a88a-4594-ad0b-3d223d2519de&algo_exp_id=475dc49c-a88a-4594-ad0b-3d223d2519de-8&pdp_ext_f={"sku_id":"12000017333792208"}&pdp_pi=-1;16.3;-1;-1@salePrice;USD;search-mainSearch

Aliexpress has weird links, this one works for me.

 

[HiGHFLYiN9]

If you go to Aliexpress and paste 32812050441 in the search bar it takes you to the amp.

Looks similar to CMoy/RA-1. So long as the DC offset is low it would probably be fine as a starter headphone amp.

 

[landaemon]

If you go to Aliexpress and paste 32812050441 in the search bar it takes you to the amp.


Looks similar to CMoy/RA-1. So long as the DC offset is low it would probably be fine as a starter headphone amp.

What kind of power supply would work well with it?

 

[HiGHFLYiN9]

If you look at the schematic it's very similar to a Grado RA-1 which used a split rail +/- 9V or 12V power supply or dual 9V batteries. This unit takes an 18V input and converts it to +/- 9V. I'd assume a standard 18V-24V 1A wall wart (like this one) would work, but wait for someone to confirm that. Mean Well is a good reliable brand in my experience.

I'm in the process of building an RA-1 clone power supply, you can see the schematic below. Your unit is already handling some of what is pictured.