I don't believe so. I did scroll down to check the specs and noted a frequency range of 137 to 20,000 Hz. I'm not sure if this driver would dig deep enough in the lower bass regions, or if it did, would create issues or distortion. Then again, the price is right and well worth a try. I'll have to see if I would need another Parts Express order for other items and it would be worth tossing these in the cart to see.
Also, I wanted to add a follow-up from the previous discussion on the thread here between JoeDoe and myself about the upper frequencies when using the PX100 II drivers in wooden cups. Over the past 2-3 days, I've been trying some various combinations of devices to drive the SennGrads to see where a good "sweet spot" might exist. The specifics of my little evaluation are listed below.
Music player: Foobar
Music Genres: Several
Amps Used: Schiit Vali, Matrix M-Stage (w/updated power supply), and the Schiit Asgard (v.1).
DAC used: oDAC by JDS Labs.
Headphones Used: The SennGrads in wooden cups that I've posted pictures of earlier. Headphone cable - 6' Canare star quad cable, with a 1/4" Amphenol TRS plug.
Surprises? Yes. While I really loved - I mean loved the Schiit Vali with my Beyerdynamics DT-800 and the T90s, I realized that the Vali didn't play nice with the SennGrads. Not at all. The Vali is a hybrid amp with tubes on the "pre" section. Yet, when most people think of tubes, they think the sound will usually be a bit mellow and controlled. In the case of the SennGrads, the highs were way too etched. In fact, I realized I had to apply some EQ adjustments via Foobar to bring the upper frequencies within a range that would be acceptable for longer-term listening sessions. This really baffled me, especially since the amp was so good with other headphones.
More Surprises? Of course. I then used the Schiit Asgard (v.1) for a period of time as I switched between the Vali and the Matrix over the period of days to check the sound during various times when I'd have the availability to listen. The Asgard really performed well with the SennGrads. In fact, I'd almost call it a match made in heaven. No EQ adjustments were required at all. I realized I could really enjoy longer listening sessions with no issues and the sound was just "spot on". No real issues with upper frequency fatigue were noted.
Again, More Surprises! Sure. I then utilized the Matrix M-Stage (w/built-in DAC). I found that when using the Matrix along with the oDAC, the listening experience was similar to that of the Schiit Asgard (v.1). Yes, that's correct. No Schiit. I mean that the Matrix was a very good performer. Longer sessions were really enjoyed - detailed, good soundstage, good bass, mids, etc. and fatigue-free. Additionally, I then disconnected the oDAC from the chain and switched over to the DAC built into the Matrix. I found a sound signature that was awfully similar to that of using the amp section of the Matrix paired with the oDAC. Just a good, smooth sound that could really be appreciated.
Granted, this is just how I perceived the listening sessions based on my ears, level of volume during listening, etc. I can't believe that the Vali really had that much of reach to really driving up the frequencies with these headphones. So, like in most situations, the simple snap shot of time can make one garner a first impression that can be lasting. However, if one is patient and has a few other pieces of gear to work with, the results can sometimes be surprising. To me, as I had been able to relate to the comments regarding the upper frequencies, I realized that I didn't want to detract any members here in the forum from trying different driver alternatives as we've been discussing or even to have someone get the impression that the Sennheiser PX100 II be avoided as it might have a flaw in this situation.
For me, the SennGrads are staying. I still am moving ahead with trying to get a few additional pair off the ground since I do have all the supplies available for the purpose.
Enjoy ... and Happy New Year !!
Edit: I was away from the forum a bit doing some other work. I wanted to clarify that because in my case the Vali didn't perform as well with the SennGrads, it doesn't reflect in any way that the Vali is an amp that should not be purchased. The Vali was a very solid performer with many headphones I tried it with. For the coin, the Vali is an excellent performer. Truly stunning. In the case of further stating that the combination of the Vali and the SennGrads didn't work out ideally, but I still think that in this combination, a small bit of EQ adjusting would really make for a good combination.
Edited by wje - 1/1/14 at 8:29pm