[Jackpot77]

Imagine the R3 Phase could be a push/pull configuration, as Bob has designed one previously for his old employer who shall not be named.

That would fit with the description. Basically the drivers face each other in the driver enclosure with one wired in reverse phase, so when driver A pushes outwards, driver B opposite will pull inwards. I believe the term isobaric is also used for some of these types of designs (not all) - the Audio Techica CK9 and CK10 had a similar config.

In an Isobaric configuration you potentially get lower distortion, its possible to get better bass extension and transient response also. Something to do with reducing the non-linearities of a single driver by running a second alongside, so any "errors" or distortion artifacts are cancelled out.

Will be interesting with two large 15mm drivers - this sort of setup is typically seen in subwoofers for home hifi.

 

[MattSPL]

My RAH’s have finally arrived in Dublin mail centre. I’m hoping they get delivered tomorrow

 

[Jackpot77]

In Rah related news, finding it difficult to move away from the black base/blue tip combo. Once you adjust to the bass, it gives a sense of physicality and warmth that I miss when going back to other IEMs. Starting to get more hours on the drivers now, and clarity send to be improving - most likely brain burn as I adjust to the signature, but I find the wide bore Acoustune tips help in this regard as well.

 

[jeffhawke]

I believe the term isobaric is also used for some of these types of designs (not all)

Quite. There is in fact a current example of non-push/pull twin drivers in an isobaric chamber, and that is the Spirit Torino Twin Pulse line of full-size headphones, which I had the opportunity to try extensively, very impressive!

 

[JMR77]

Just received mine and tested some filter combinations, sorry to ruin the hype, but to me the Rah is (very) sibilant, more than the Aten (and I own a pair MDR EX1000 with which I'm totally fine), also for reference I found the Zenith not sibilant. I'm not liking the Rah so much for now (and I don't expect any burn miracles)...YMMV

 

[jon parker]

Just received mine and tested some filter combinations, sorry to ruin the hype, but to me the Rah is (very) sibilant, more than the Aten (and I own a pair MDR EX1000 with which I'm totally fine), also for reference I found the Zenith not sibilant. I'm not liking the Rah so much for now (and I don't expect any burn miracles)...YMMV

Sibilant?? Something is wrong :/
could you kindly list your player, nozzles used, tips etc etc - Is your cable the right way round

 

[518969]

Just received mine and tested some filter combinations, sorry to ruin the hype, but to me the Rah is (very) sibilant, more than the Aten (and I own a pair MDR EX1000 with which I'm totally fine), also for reference I found the Zenith not sibilant. I'm not liking the Rah so much for now (and I don't expect any burn miracles)...YMMV

I very much doubt you will kill the hype but I am surprised to hear you say they are sibilant and the Zenith not. My sets are the other way around and haven’t heard a hint of sibilance so far with out of the box black black.

 

[Jackpot77]

I echo that - mine aren't sibilant AT ALL. Will be interesting to hear what setup you are using - not discounting what you are heading, but it definitely sounds different to how I'm hearing the Rah. Fingers crossed for you there isn't an issue!

 

[Infoseeker]

Remember, using smaller nozzle tips can ease highs. Though it may make the bass higher.

 

[opiumhum]

Looks like mine hasn't even left the UK yet - waiting for two weeks for a delivery within the EU is mildly frustrating. If it wont arrive by Saturday I'll be gone and can't pick it up, so it's likely to get sent back

 

[lepre]

Looks like mine hasn't even left the UK yet - waiting for two weeks for a delivery within the EU is mildly frustrating. If it wont arrive by Saturday I'll be gone and can't pick it up, so it's likely to get sent back

Mine got delivered this morning, so it seems not all take so long into the EU .

 

[Jackpot77]

The joys of Royal Mail deliveries - they should also run the National Lottery here, the way some international postage gets dealt with.

 

[rocko77]

No harsh highs for me either and I'm sensitive to them. I'd say they sound as relaxed as a pre fazor Audeze so far

 

[HungryPanda]

I certainly have no sibilant issues either

 

[monsieurfromag3]

Looks like mine hasn't even left the UK yet - waiting for two weeks for a delivery within the EU is mildly frustrating. If it wont arrive by Saturday I'll be gone and can't pick it up, so it's likely to get sent back

Damn. Mine were delivered to me in Paris yesterday. Fingers crossed for you.