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Is a Step-up Transformer needed?

Hi, I am using a Denon DL-103 with an Output Voltage of 0.3mV and a recommended load resistance of 100 Ohms or more except when transformer is provided (direct quote from instruction manual) and a Pro-Ject Tube Box SE which can be set to either 100 Ohm, 220 Ohm or 1kOhm. I am confused about the output voltage issue. Can I use any of these settings without the step-up transformer? Thanks.
128x128tarraga
czarivey
5,946 posts
 
tube box most-likely won't be enough and you may need sut.
stereo5's avatar
stereo5
6,407 posts
 
I used mine with a Bob's Devices Cinemag 3440A SUT into my phono input and it sounded great.  The sound had more authority and detail through the SUT.  I believe the Denon is a 30 or 40 ohm load.
thuchan
1,009 posts
 
40 ohms load. You should go for a SUT. There is an interesting thread regarding the usage of SUTS or not on Agon.

tablejockey
3,916 posts
 
you have 60 db's of gain with the box.

Use that and you can pay the load by ear, besides the recommended setting.

You may just have to use more of the volume knob for desired 
loudness.

nandric's avatar
nandric
4,086 posts
 

Dear Thuchan, Do you have some general criteria for SUT's use?

Should they be used by all LOMC or is the output not relevant?

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