cyrus 1 amp later version

[whats gan on]

hi i have a wonderful cyrus 1 amp is there any good mods for this amp to get even more from it.i would like a bit more bass, also would replaceing all the dioes with something better would it smooth this amp a little. or would i need to replace the out put transformers with something better
all suggestions would be great

[richie00boy]

Upgrading the volume pot and ditching the balance part was one mod I did to my friends to cure the noisy pot, but it was not an easy task due to having to make a small daughter board for the new pot.

The best way to get more bass is to attach the PSX. Then you get loads of bass, and it's really punchy without being bloated.

There are no output transformers, I suspect you mean transistors. You can replace these, but don't expect drastic differences. I replaced my friends with MOSFETs and the sound was pretty much indistinguishable from before.

[whats gan on]

hi thank you for you reply mate how do you get rid of the balance once disconncted will i be able to fit a better pot without any mods. sorry i did mean out put transistors what was the model number, of the ones you used is there such a thing as audio grade didoes as the power amp has lots in the curcuit
my amp is the is a cyrus one i have no connection for a psx

[hacknet]

i have got a couple cyrus ones. they can be connected to a psx. all you need is to buy the connector to connect the board to the cable. the other thing you need to do is to cut a hole in the plastic cover.

i would start by replacing the caps. the caps would be pretty old and weak. the decoupling caps too.

i did try playing with the coupling caps and that did bring pretty good results.

you might also want to try to bypass the power lytics with small film caps.

[whats gan on]

hi thank you
i can see the bit were you need to make a hole do you have any pics please so i can copy yours mine is the later model which is a little different from the old version thanks for all the help looks like i really need a psx

[hacknet]

i have the same version as you.

the amps are all on loan to friends at the moment and i one in india at the moment!

have you opened the amp up yet?

[whats gan on]

hi mate yes i have. i have a pic of the old version that i found from the net mine has a diode joined across the input and also there is lots of little diodes all over the power amp section could i replace these with better quality diodes
thanks again

[hacknet]

well, you can try.. i havent got down to doing that yet..

[whats gan on]

i just want a smoother sound with the detail i know my speakers are good but i get very little bass they tannoy 611 mk2

[hacknet]

start with the power caps they are the biggest problems because of its age..