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Oppo PM-1 Planar Magnetic Headphone Impressions Thread - Page 155

post #2311 of 3442

If you don't hear warm bass frequencies, you need to contact Oppo. Something is wrong with your pair. 

post #2312 of 3442
Quote:
Originally Posted by Flash676 View Post
 

I received my pair today.

 

Does anyone else have a distinct lack of bass with these?  I can barely hear frequencies below ~40 Hz in music with these, if at all.  I can definitely hear test tones down to 20 Hz but it seems like they start to drop off rapidly below 35 or 40 Hz and everything above that seems to lack impact.  It may not help that I listen at low volumes.

 

...

I should probably add:

 

1.) I'm not really a headphone guy, hence the lack of full sized headphones.  These were for times when I don't want to use my entire home theater system.

2.) My speakers are electrostatic, and I've never really significantly listened to any that weren't, so all these amazing planar magnetic qualities I read about are qualities I already take for granted.

3.) I'm "multi-purpose" so I listen to music, movies, and video games all on the same system.

 

I'm willing to accept that the problem is the lack of a proper amp, however, others have mentioned that these sound "fine" through low powered sources like an iPod.  Unfortunately the only sources of amplification I have available now are my iPhone and my home theater receiver, neither of which I could tell apart in a blind test.  The receiver is a Pioneer Elite SC-68 which was their flagship model from a few years ago, I should hope it can adequately drive a pair of headphones.

 

...

 

There is no real drop off in bass with the OPPO above 20k, it's not as heavy as some cans but its there.  But if you are switching back and forth between the PM and a home theater system with a massive sub or two you could definitely perceive it as a lot less on the low end, because it is in that case. A bigger headphone amp wouldn't fix the problem either, my bet is you wouldn't hear the difference between it and your receiver with the cans.

 

You might look at one of the "headphones for gaming" threads to get some ideas about better matches for a home theater system.  If you primarily do the movies and games there are a lot of choices out there.  And if your receiver has a simple bass boost I wouldn't be above trying that.

post #2313 of 3442

^^ Good point. I read over the post again. If he doesn't have much experience with hp's, but is more of a home theater guy then that would make sense. Mostly hp bass won't make the windows panes rattle like a serious home theater sub will. 

post #2314 of 3442

The bass on the SE846 is very powerful...

 

The bass on my PM-1 did seem to increase in quantity on my pair after several hours of use. I am very happy with the bass levels in them.  They will not have the powerful bass of the SE846 though.

post #2315 of 3442

They need to break in. They are a bit congested and have some one-note bass when new, but after about 50 hours (roughly) they open up a lot and are now truly great (like one of the gushing reviewers said).

post #2316 of 3442

So what's the release date for the PM-2 ?  June is next week ;)

post #2317 of 3442

As of last week, the estimate was June, but I was told it was strictly an estimate and there may be unexpected delays.

post #2318 of 3442

Ok thanks for the update.

post #2319 of 3442
Quote:
Originally Posted by ogodei View Post
 

 

There is no real drop off in bass with the OPPO above 20k, it's not as heavy as some cans but its there.  But if you are switching back and forth between the PM and a home theater system with a massive sub or two you could definitely perceive it as a lot less on the low end, because it is in that case. A bigger headphone amp wouldn't fix the problem either, my bet is you wouldn't hear the difference between it and your receiver with the cans.

 

You might look at one of the "headphones for gaming" threads to get some ideas about better matches for a home theater system.  If you primarily do the movies and games there are a lot of choices out there.  And if your receiver has a simple bass boost I wouldn't be above trying that.


It's not just the very low bass, though the lack of it is the most noticeable.  Sounds like drums seem to be more of a dull thud without any heft to them.  I recognize I'm not going to get a HT-like experience but I'm not exactly a bass-head to begin with (I have one 12" sealed sub that was designed for music and the frequency response has been corrected to be as "flat" as possible given the room it's in.)

 

I don't think I have tone controls for the headphone output on the receiver, but what I do have is an extra set of speaker terminals that I can re-assign as the L and R channels for a second zone.  I've read that others have driven their ortho headphones directly from their speaker taps.  Is that a possibility or inadvisable due to the higher sensitivity on the Oppos?  I'm not even sure what additional hardware this would require or if there would be any benefit.

 

If the problem isn't the hardware, I think my only hope at this time is that they start to improve with additional listening time.

post #2320 of 3442

New review : http://forums.hardwarezone.com.sg/headphones-earphones-portable-media-devices-314/%5Bfirst-impressions%5D-oppo-pm-1-a-4694191.html

post #2321 of 3442

So, FWIW, I'm finding some sort of great synergy between the PM-1 and my 15-year-old Headroom Max amp. I'm not sure why, but it's just great, so I would suggest that anyone looking for a good inexpensive system try to find this amp or one of its descendants (like the Blockhead or the BUDA) and give it a try. I'm a tube fan, but something very right is going on here, even with just a Dragonfly DAC or with a high end EMM cd player.

It's really good, with nice definition, solid controlled deep bass, vocals that are sweet and have nice silky boundaries, and even decent soundstaging. This is the best sound I can recall by far with any phones with the Headroom amp.

These amps aren't made anymore but mine has functioned flawlessly all this time.

Maybe Tyll could comment here.

post #2322 of 3442
Blockhead... Flashback to 10-15 years back... Would be surprised many current readers know about this stuff smily_headphones1.gif
post #2323 of 3442

True, but I think many members know who Tyll is (even if they don't know that he is famous around here because the Headroom amps were his first major accomplishment (as designer and producer)).

post #2324 of 3442
Quote:
Originally Posted by Flash676 View Post
 


It's not just the very low bass, though the lack of it is the most noticeable.  Sounds like drums seem to be more of a dull thud without any heft to them.  I recognize I'm not going to get a HT-like experience but I'm not exactly a bass-head to begin with (I have one 12" sealed sub that was designed for music and the frequency response has been corrected to be as "flat" as possible given the room it's in.)

 

I don't think I have tone controls for the headphone output on the receiver, but what I do have is an extra set of speaker terminals that I can re-assign as the L and R channels for a second zone.  I've read that others have driven their ortho headphones directly from their speaker taps.  Is that a possibility or inadvisable due to the higher sensitivity on the Oppos?  I'm not even sure what additional hardware this would require or if there would be any benefit.

 

If the problem isn't the hardware, I think my only hope at this time is that they start to improve with additional listening time.

 

I have never gone down the speaker taps route, I've been to busy playing with dedicated headphone amps so I cant say much on that subject.  The speaker amps for headphones thread has some good info on that.

 

As far as drums being a dull thud on the PM1s, I don't hear that myself on my set.  Totally random speculation:  Your Pioneer, while having plenty of power, might have high output impedance on the phone jack which is interacting with the low impedance PM1s?  Admittedly unlikely as planar phones are supposedly less susceptible to this type of distortion but some receiver makers don't pay too much attention to their phone jacks ( like speakers on good TVs).  Are there any specs available for the headphone out on that unit?

 

My suggestion is try the PM1s on another player, a DAP or even your phone.  If you are still perceiving that quality, try out a little bassier can.  Might be you just are used to a more fuller sound.  For the record, I don't much subscribe to break in significantly changing the sound of a can so don't hang on to these hoping for the miracle.  Your appreciation of their sound may change though, that happens to me all the time.


Edited by ogodei - 5/31/14 at 8:10am
post #2325 of 3442
Quote:
Originally Posted by arnaud View Post

Blockhead... Flashback to 10-15 years back... Would be surprised many current readers know about this stuff smily_headphones1.gif

In the recent Audeze LCD-X review in Stereophile, the Blockhead amp was used (by John Atkinson himself).

http://www.stereophile.com/content/audeze-lcd-x-headphones-associated-equipment

 

Quoting:

Once the mixes were finished, for my regular music listening I retrieved from storage the sample of the HeadRoom BlockHead headphone amplifier I'd bought following Jonathan Scull's rave review in July 2002. The dual-mono, fully balanced BlockHead uses a three-pin XLR jack for each channel's input; fortunately, Audeze sells a balanced adapter cable ($60) with a four-pin XLR on one end and dual three-pin XLRs on the other. I used the BlockHead without its proprietary crossfeed processing bypassed, and with its high-frequency equalization set to None.

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