!So Rose Technics has just last week completely re-designed their 7 BA flagship iem, now called the BR7 EZA, it has a new side firing BA for the super high frequencies, I haven't seen a BA like this before.
2 BA for bass, 2 BA Mids, 2 BA Treble, 1 Side Firing Super tweeter. Cross over completely redone with a new type of capacitor, four sound tubes all leading directly to nozzle.
I received the BR7 EZA from Penon and so far it sounds fantastic. The bass is bold but tight, the treble is indeed very extended, some sparkle, detailed but thankfully not fatiguing, the mids don't jump out, not a thing missing detail wise, but rather on the full and smooth side. Maybe not the best for crunchy guitars, raspy or female voices, but also a blessing, no sibilance. Just to be clear, I wouldn't call the upper mids recessed, rather just smoothly transitioning into lower mids, the detail and texture is all there, even sibilance is heard in terms of detail, rather than perceived as a harsh or painful sound, but sometimes I'm in the mood for that harshness and bite.
I cannot state enough how perfect I find the treble to be, right in line with the bass and transitioning smoothly into mids, just the right amount of sparkle.
The previous iteration of BR7 struggled with bass being light, but this latest version has taken a 180 turn and lays the bass on you, although without losing any control, at all. It has quite a lot of impact, but focused on mid bass kick rather than sub bass throb, dubstep fans look elsewhere, but trance fans rejoice. The bass transitions perfectly into mids, male voices are full and throaty.
The all round non-fatiguing yet detailed nature of the BR7 means if you are in the mood you can pump the volume and be rewarded with some very bombastically entertaining sounds that keep their composure and finesse. This is a very versatile iem.
Overall my impression is that there is no holes or spikes in the frequency response and imaging is excellent, interestingly I hear a progressively larger sound stage the higher the volume, probably something to do with that big capacitor in the chain.
This is a much improved iem over the last version with very little to nothing that I could fault other than upper mids using more bite, although that is more preference than deficiency in the iem and could also just be my SP1000M smoothing the mids over as it generally does, this BR7 does strike me as an extremely transparent iem, good job Rose technics! I'll try it with a mid forward dap like Pono soon to see how it goes, my guess is the BR7 will become mid happy due to it's transparent nature.