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Amp impedance question

post #1 of 5
Thread Starter 

Greetings,

 

I have a Delta 66, which i am currently using for its dac, however the output impedance is 130 ohms because it was intended for monitoring.

Now i was planning to add an O2 after it, and i was wondering if the signal fed into it would also have rolled off frequencies?

How would this chain exactly work?

 

Bonus question, is any rca to rca cable ok or are those marketing gimmicks true? Im not really informed on the matter.

 

Headphones are dt770 80ohm.

 

Regards, Alku

post #2 of 5
Thread Starter 

Bump. I hope the op is clear, if not someone tell me.

post #3 of 5

The input impedance of the O2 is very high (something like 1MOhm maybe?), and it's not frequency dependent like it is in headphones, so there won't be any roll-offs in FR due to the DAC's output impedance.

post #4 of 5
Thread Starter 

Thank you, that's what i wanted to know. 

 

Regards, Alku

post #5 of 5
Quote:
Originally Posted by Alku View Post
 

 

I have a Delta 66, which i am currently using for its DAC, however the output impedance is 130-Ohms because it was intended for monitoring.

Now i was planning to add an O2 after it, and i was wondering if the signal fed into it would also have rolled off frequencies?

How would this chain exactly work?

Bonus question, is any RCA to RCA cable ok or are those marketing gimmicks true? I'm not really informed on the matter.

Headphones are DT770 80-Ohm.

 

From my understanding a high impedance for a line signal output is a positive thing.

The O2 (Objective 2) headphone amplifier output will still have a less then 1-Ohm output impedance :) while the Delta 66's line-output is connected to the O2's line-input.

 

Here is a low cost "Premium" RCA cable.

1.5ft Premium 2 RCA Plug/2 RCA Plug M/M 22AWG Cable - Black

http://www.monoprice.com/Product?c_id=102&cp_id=10218&cs_id=1021814&p_id=5346&seq=1&format=2

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