post #811 of 1153
2/20/10 at 2:58pm
I am not convinced by the turning down Itunes suggestion. It certainly helps, but on music with a very broad dynamic range (a good example would be large scale choral work) if the Itunes volume is set at 75% and the D4 is set at an appropriate volume for the quieter passages distortion/clipping is still clearly audible on the louder passages.
I am very impressed by Madwolf's suggestions and am building up to the 2.2k resistor mod.
However, my take is that the Ibasso D4 has got a design fault and I would not recommend that you buy one for use with a Macbook pro.
I am going to email Ibasso with this issue to see what their take on it is.
I will keep you all posted.
In the meantime I would keep your wallet closed for the time being.
Just installed HiFlight's D4 topkit today and i realized a significant improvement in sound. The D4's much clearer and the soundstage has definitely widen by a noticeable margin!
I've been doing my fair share of "homework" by extensively using the D4 to get used to its "stock" sound so that i can really tell if there is a difference with the upgraded op-amp installed and am pleased to report, indeed there is! And a significant improvement at that!
I understand that replacing the stock buffers with the dummy buffers would yield a better battery life in exchange for some decrease in bass and power? And since i'm gonna be using the D4 primarily as a DAC, i've decided to leave the stock buffers where they were! (Please correct me if i'm mistaken)
All in all, a worthy upgrade for all D4 users! I've yet to listen to any of the RSA amplifiers but according to HPA, if the D4 with upgraded op-amp comes close to the sound of the P-51, i'll definitely be looking into getting an RSA amp in the near future since the upgraded D4 sounds so clear and wonderful!
Thanks to everyone for their invaluable advice through this thread!
Thanks Saar.One last Q how much does the D4 Mamba weigh with the battery in it.How big is it when compared to the cMoy( JDS Labs v2)??
Is it easy to change the amps coz i am planning to get the rollalbe amps also had a word with iBasso they said the price is $25USD.i just want the investment to be rock solid for the next 3 years atleast.