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Little Dot 1+ Power

post #1 of 13
Thread Starter 

Hi guys.

 

I have read on numerous occasions that the Little Dot 1+  (the one with tubes) does not have enough power to drive high impedance headphones. I have 250 Ohm beyerdynamics and on their specs, the have a max handling power of 100mW. On the Little Dot 1+, at 300 Ohms, they offer 150mW of output. Am I missing something, or do the specs not say the Little Dot 1+ could easily drive 250 ohm headphones?

 

Thanks.

post #2 of 13
Thread Starter 

Bump :)

post #3 of 13
Thread Starter 

Bump again :)

post #4 of 13

According to this guy, yes:

http://www.head-fi.org/t/513393/guide-sonic-differences-between-dt770-dt990-models-more#post_6938761

 

I think you can also adjust the gain settings on it. 

post #5 of 13

I've also driven 600ohm headphones on the little dot 1+.  It will drive them, but mo they sound a lot better on amps that deliver a bit more power...

post #6 of 13
Thread Starter 

I'm going to receive some Ultrasone Pro 900s soon so I'm still thinking of the Little Dot. If it has enough juice for the 250 Ohm Beyers, it would probably be even more suited to the Ultrasones? I don't really have enough money to get a more powerful amp atm along with a dac, so do you think the Little Dot would be the best choice paired with a cheap dac?

post #7 of 13
Quote:
Originally Posted by NinjaVampire View Post

Hi guys.

 

I have read on numerous occasions that the Little Dot 1+  (the one with tubes) does not have enough power to drive high impedance headphones. I have 250 Ohm beyerdynamics and on their specs, the have a max handling power of 100mW. On the Little Dot 1+, at 300 Ohms, they offer 150mW of output. Am I missing something, or do the specs not say the Little Dot 1+ could easily drive 250 ohm headphones?

 

Thanks.

 

I don't get this either. I've messaged with David (owner of Little Dot), and he told me the LD+1 is suitable for cans 80 ohms and under.

But 150mW into 300 ohms seems like plenty. The Fiio E9 has the same power specs into 300 ohms, and I use that for higher impedance cans.

post #8 of 13
Thread Starter 

This whole thing is very confusing. Are there other factors at play that are required to drive the headphones or is the output (mW) enough to go with? If so, why do people then say amps such as the LD 1+ can't drive high impedance cans?

post #9 of 13

Well, it seems illogical

post #10 of 13
Maybe I can add my 2 cents here

I have 3 little-dot Amps. A Little-Dot II+, A Little-Dot II++ (Immediate predecessor to the MKII), and a Little-Dot I+.

The II+ and II++ are both full tube units and deliver more power into high impedance headphones. The I+ using transistor output, delivers much more power into low impedance headphones.

I have a number of different headphones. My lowest-impedance headphones are my Sony-XB700s at 24ohms, and my highest-impedance headphones are my Beyerdynamic DT990-Pros at 250ohms.

Using the 250ohm DT990-Pros on the Little-Dot I+ works fine. The difference is that I have to turn it way up, past noon on the dial for it to really get loud and even then, heavy bass ultimately just lacks punch and impact. The amp is really running out of gas at that point, and you can tell. It doesn't sound bad, but it doesn't really sound great either.

The Sony XB700's however, at 24ohms, the I+ is delivering almost an entire watt into these suckers. The amount of power it is able to pump into these headphones is truly breathtaking, because they are very well matched.

Just the same, my preferred amp for my 250ohm DT990-Pros is my older Little-Dot II+, a DHT tube design that is good for about 600mw at 250ohms and these DT990's really come alive. They absolutely can handle more power than the specs say and I pump that into them hours on end every single day. The bass is clearly more defined, with impact and punch that the I+ lacks (when matched with the 250ohm cans).
post #11 of 13
Thread Starter 
Quote:
Originally Posted by GotNoRice View Post

Maybe I can add my 2 cents here

I have 3 little-dot Amps. A Little-Dot II+, A Little-Dot II++ (Immediate predecessor to the MKII), and a Little-Dot I+.

The II+ and II++ are both full tube units and deliver more power into high impedance headphones. The I+ using transistor output, delivers much more power into low impedance headphones.

I have a number of different headphones. My lowest-impedance headphones are my Sony-XB700s at 24ohms, and my highest-impedance headphones are my Beyerdynamic DT990-Pros at 250ohms.

Using the 250ohm DT990-Pros on the Little-Dot I+ works fine. The difference is that I have to turn it way up, past noon on the dial for it to really get loud and even then, heavy bass ultimately just lacks punch and impact. The amp is really running out of gas at that point, and you can tell. It doesn't sound bad, but it doesn't really sound great either.

The Sony XB700's however, at 24ohms, the I+ is delivering almost an entire watt into these suckers. The amount of power it is able to pump into these headphones is truly breathtaking, because they are very well matched.

Just the same, my preferred amp for my 250ohm DT990-Pros is my older Little-Dot II+, a DHT tube design that is good for about 600mw at 250ohms and these DT990's really come alive. They absolutely can handle more power than the specs say and I pump that into them hours on end every single day. The bass is clearly more defined, with impact and punch that the I+ lacks (when matched with the 250ohm cans).
 
Hi and thanks for the great reply :) That makes a lot of sense. Can I ask how you find your XB700s sound when you use say the Little Dot Mk III?
post #12 of 13
I don't have an MKIII but my II+ and II++ are comparable in terms of their preference toward high-impedance headphones. The 24ohm XB700s work okay with them but it's the same sort of situation where the amp is running out of power with the heavy bass notes. With the tube units it's not as bad as when the I+ runs out of power due to the different distortion characteristics of tubes but it's still something other than the desired result and the bass is just not very impactful.
post #13 of 13

Do you think LD i+ will drive properly Beyers T70 250ohm (the aure more efficient as a Tesla transducers) ?

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