Per
HeadphoneAddict's impressions, the -dB's output voltage was lowered by almost half compared to the original CLAS. He didn't like this, because he seemed concerned about the dB's ability to output enough volume for higher-to-drive cans like the HE-500, but I see this change as a very positive move by Cypher Labs.
One of the main problems I have with the CLAS is its high output, which leads to either hiss or an excessively high volume with many portable amps (even when those amps are set at their lowest volume setting). This is especially a problem for IEMs and sensitive full-size headphones, like the DT1350 and Ed. 8.
I don't think the -dB's lowered output is going to create problems for LCD-2/3 users, since with the LCD-3 in balanced mode and the original CLAS, I never have to go beyond low gain on the MK3. The only headphones that might have issues with lowered output are the HE500, HE-6, and HD800, but it's still hard for me to see how the MK3 on medium or high gain won't drive these cans to suitable volumes.
Also, it's nice to see that the -dB can be used as a USB DAC, though it remains to be seen if it can compete in the $700 (or less) USB DAC market, which seems to have lots of good options these days.
5 days ago my latest class -dB just arrived
I done the comparison between my class solo tactical edition vs class -dB
Source : iPhone 4 S
Dac : Class Solo tactical edition
Class - dB
Headphone : LCD 2 rev 3 ( with angle headphone jack )
LCD 3
Iem : tralucent Audio 1+2
Fit ear 334
1st First impression :
Overall the SQ from Class solo and class - dB More or less not so much big diffferent
Class -dB : slighly better detail , better soundstage
Output voltage the latest - dB increase to 1,69 Volt from 1,20 Volt
Gain is not so High Than Class solo
Class solo : has better bass impact . Soundstage is not so Wide as Class -dB , With better Depth
Output voltage about 2,0 Volt
Gain is very High
My conculsion :
Class solo : is very Good for all rounder use .from sensitif iem like fit ear 334 to
High impendace headphone like HD 800 .
With LCD 2 and 3 has No problem With the Power
Iems is Hissing .
Sound excelent .
Class - dB : for iem like fit ear 344 and tralucent 1+2 is excelent .
Gain on my Rx 3 B set in Medium , Hissing is still There With my fit ear 334
With tralucent 1+2 less Hissing almost zero.
For Low impendamce headphone like ultrasonie Ed 8 Sound excelent too
For High impendace headphone and Ortho LCD 2 and 3 is not so Good
Gain on my Rx 3 B i must set in High and the volume Maxx , still to Low , i feel
Lifeless and boring SQ to analitical .
Can not has impactfull like my Class solo With full sounding SQ.
SQ to my LCD 2 and 3 is more Life and dynamic.
I Love it
Gain seting at my Alo Rx 3 B :
Iems and Low impendamce headphone like ED 8:
Class solo : Low gain
Class -dB. : medium gain
Low gain i must turn the volume to Maxx
Headphone DD and Ortho :
Class solo : Medium to High gain
Class -dB. ; High gain and the volume to Maxx = same in my Class solo
Medium gain to drive LCD 2 and 3
This is my personal impression .