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Fostex HP-P1 Portable Amplifier and DAC for iPod/iPhone (Short REVIEW and Impressions Thread) - Page 10

post #136 of 1291
Thread Starter 
Quote:
Originally Posted by jgharding View Post

I had the popping and clicking issue once so far in a good week's use with the iPhone 4. I just switched it off and on again and it stopped. It doesn't appear related to processor or memory incidentally, as I have a jailbroken device and freed-up both to no avail: a restart alone will fix this.


Ah- interesting to know that it works with jailbroken devices.  I've yet to do that, but might consider it with my iPod since it's not my phone and I pretty much use it as a dedicated music player.  In other words, it's not the end of the world if I brick it or lose contents.  I think I also might wait a while before doing the iOS5 upgrade on this- just to make sure.  I'm pretty certain that iDevice protocol is pretty strict, but I also know that these kinds of devices (well, just the handful so far) are probably 0.00001% of iDevice users.  So I'll take the "you first" approach for now.  biggrin.gif
 

 

Quote:

 

This is yet another DAC that proves to me the much more 'real' sound of minimum-phase filters as opposed to linear-phase filters. Filter 1 is much more 'smeared' than filter two. Of course, it compliments some music more, but in the time domain it's a long way behind. The phase problems of a well-designed minimum-phase filter only rise above a few samples of discrepancy as the audio frequency goes above 14kHz — the point around which human hearing can't really determine differences in pitch. It's more like noise up there really, we're not that sensitive to a few samples of phase!

 

 

It sounds like your ears are much better trained than mine because I have a hard time telling the difference between the two filters.  If you don't mind my asking, can you give me an idea of what you look for, what kind of musical material best reveals the differences, and what parts of that material are most revealing (soft passages, high freq, etc.)?  Thanks!

 

post #137 of 1291


No point in upgrading a cable tranferring a digital signal. At least not a short one like this. This is one of those topics, that should not be allowed to take over a thread like this. So be it, if anyone disagree with me.
 

Quote:
Originally Posted by ExpatinJapan View Post

Yeah I have done a couple of in store demos already, but not fully convinced, If it was half the price, yes.

And I am still worried about a few points.

 

-The quality of the hp_p1 amp section.

-Would I notice the upgrade in sound quality whilst riding the train?

-Whether the supplied USB cable quality is high enough.

-Are my ATH-ESW9 and Triple fi10 good enough for this upgrade?



 

post #138 of 1291
Quote:
Originally Posted by librarian View Post

No point in upgrading a cable tranferring a digital signal. At least not a short one like this. This is one of those topics, that should not be allowed to take over a thread like this. So be it, if anyone disagree with me. 

 


Thanks for that. I have decided not to buy this for now.

 

Diminishing returns and all that.

 

If I could get more information on the internal amp, and....If there more people singing its praises I would be more tempted.

 

Also I am hoping there will be a smaller mark two, or one by ibasso or someone that matches the iPod footprint and fits in ones hand.

 

*Still tempted. By the fostex and the hifiman 601.

 

post #139 of 1291

I can't wait to get my hands on the Fostex HP-P1 again. I bought a loaner model. And it's on it's way to a good home here with me. Since it got out of my hands I have missed it. The sound of the dac is just more refined. More detail. Better resolution. And above all a lot more comfortable to listen to. Makes the iPod Classic 160gb dac sound harsh and not very elegant. Don't like it that much anymore. 


Edited by librarian - 10/8/11 at 2:19pm
post #140 of 1291

I have been listening to the HP-P1 for the past 2 weeks with my TF10s and haven't been that impressed with the amp side of it. Admittedly my TF10s sounded dark. What made the HP-P1 shine was coupling it with my friend's RSA Predator (i.e. using the HP-P1 as DAC-only). This was true not only with my TF10's but with my friend's SF5 & Fostex T50RP.

 

Today I went out and traded in my TF10's & E5c and bought the JVC FX700 & the Go-DAP 4.0. The FX700 has given me the clear highs and the deep bass I'm looking for and overall, happier with the HP-P1 + FX700 combination. I've not tested the Go-DAP enough but preliminary views are the Go-DAP is very similar to the HP-P1 in terms of SQ.

 

Note: I find the FX700 doesn't have the soundstage depth of the TF10's though.

 

Next week I'll receive delivery of a Pico Slim and will do more tests of the HP-P1 + Pico Slim vs the Go-DAP.

 

And hopefully in a few weeks I'll get back my UM SE530x8 which will be my primary IEM.

post #141 of 1291
Quote:
Originally Posted by AnakChan View Post

I have been listening to the HP-P1 for the past 2 weeks with my TF10s and haven't been that impressed with the amp side of it. Admittedly my TF10s sounded dark. What made the HP-P1 shine was coupling it with my friend's RSA Predator (i.e. using the HP-P1 as DAC-only). This was true not only with my TF10's but with my friend's SF5 & Fostex T50RP.

 

Today I went out and traded in my TF10's & E5c and bought the JVC FX700 & the Go-DAP 4.0. The FX700 has given me the clear highs and the deep bass I'm looking for and overall, happier with the HP-P1 + FX700 combination. I've not tested the Go-DAP enough but preliminary views are the Go-DAP is very similar to the HP-P1 in terms of SQ.

 

Note: I find the FX700 doesn't have the soundstage depth of the TF10's though.

 

Next week I'll receive delivery of a Pico Slim and will do more tests of the HP-P1 + Pico Slim vs the Go-DAP.

 

And hopefully in a few weeks I'll get back my UM SE530x8 which will be my primary IEM.



I'm trying to remain calm here since i've been waiting for the Go-DAP 4.0 for ages now but, WHERE IN THE WORLD ARE YOU AND HOW DID U MANAGE TO GET ONE? biggrin.gif

post #142 of 1291
Quote:
Originally Posted by AnakChan View Post

I have been listening to the HP-P1 for the past 2 weeks with my TF10s and haven't been that impressed with the amp side of it. Admittedly my TF10s sounded dark. What made the HP-P1 shine was coupling it with my friend's RSA Predator (i.e. using the HP-P1 as DAC-only). This was true not only with my TF10's but with my friend's SF5 & Fostex T50RP.

 

Today I went out and traded in my TF10's & E5c and bought the JVC FX700 & the Go-DAP 4.0. The FX700 has given me the clear highs and the deep bass I'm looking for and overall, happier with the HP-P1 + FX700 combination. I've not tested the Go-DAP enough but preliminary views are the Go-DAP is very similar to the HP-P1 in terms of SQ.

 

Note: I find the FX700 doesn't have the soundstage depth of the TF10's though.

 

Next week I'll receive delivery of a Pico Slim and will do more tests of the HP-P1 + Pico Slim vs the Go-DAP.

 

And hopefully in a few weeks I'll get back my UM SE530x8 which will be my primary IEM.


I guess the CLAS will be your option....

 

post #143 of 1291

Hi GuyD,

 

Yes that's a very strong possibility. I'm already looking around for 2nd hand CLAS (2 in the forums but not priced too far from new).

 

I'll have to retest with the FX700 though. Right now the P1 sounds pretty good with the FX700. I'm beginning to learn that different amps reveal different qualities across headphones. e.g. as above my TF10 was vastly different between P1 & P1+Predator. But for my colleague's SF5 that difference wasn't as great as mine. So I'm curious about the FX700.

 

Before understanding that I thought all external amps coupled with the P1 would help make the TF10 shine but surprisingly even when I put the P1 + Continental the improvement wasn't as great as with the Predator.  Unfortunately I didn't retest the P1 + Continental combo with the FX700. Later this week, I'll retest the FX700 with P1+PicoSlim vs P1+Predator vs Go-DAP.

 

Oh very briefly, between the P1 & Go-DAP, I could hardly hear any differences with Black Eye Peas Another Weekend, Boom Boom Pow, & I Gotta Feeling. With Dave Brubeck's Take Five and Diana Krall's S'Wonderful I found it also similar but the Go-DAP being maybe a little more revealing whereas the P1 a little more "airy". This difference is accentuated when listening to Vivaldi's Four Seasons Winter Allergo non Molto. I hear somewhat more detail with the Go-DAP whereas the P1 maybe more musical? Sorry I'm not very good with my terminology. So maybe the CLAS (which I've read is more clinical than the P1) may be closer to the Go-DAP.

 

It's a pity the Go-DAP only has an S/PDIF out. Would have loved to have tested it as a DAC-only.

 

P.S. I'll take back what I said about the FX700 soundstage. It's wide but somehow what I wanted to say before was that I couldn't feel the depth and everything felt just more "forward". I don't know the appropriate jargon term for this. Maybe this is a feature of all dynamic drivers vs BAs (which I've been almost exclusively using for the past few years)?

 

iDevice DAC/Amp War

post #144 of 1291

Guys i heard one in the shops a couple of days ago, but one question just to re-confirm this. The DAC on this, is only applicable if its connected to an iDevice am i correct? which ultimately means i can't even use this as a desktop dac/amp when i connnect a usb into it from my comp, which makes it into just an amp, but not a all-round massive power one. am i on the ball on this one ???

post #145 of 1291

Yes U're right. It's for iDevices only (and on that note, I've not tested it against iOS5 yet - there's another thread of someone having problems iOS5 with CLAS, I'm -guessing- it'll be the same for the HP-P1 & Go-DAP). IMHO I don't think it's that great as an "AMP-only". In fact in some of my tests with my colleague, whilst the P1 as a DAC/Amp is good, but P1 DAC + Predator Amp was amazing. We also did try briefly the P1+Continental and it was between the P1 & P1+Predator. I'll get to test the P1+Pico Slim tomorrow when I get the PSlim.

 

i.e. IMHO the P1's amp isn't great and if you wanted to get it just for that purpose, I personally wouldn't recommend it. If you're looking for a desktop amp for your PC you're better off with some USB DAC/Amp.

 

P.S. Yes the Predator is a USB DAC/Amp. However both my colleague I agree that off the same AAC/ALAC, the P1+Predator is better than the Predator DAC/Amp. Sorry, not tried iBasso DAC/Amp range.

 

Disclaimer: we're still learning about this stuff as we test and is highly subjective.

post #146 of 1291

i wanted to know because i wanted to move away from the iDevice reliance from these dacs/amps. Wanted the flexability of swapping to a different player for eg the new sony z1000 mp3 player coming out in dec. Be pretty pointless to invest in a P1 and only have it as an amp.

 

U mentioned using P1 dac + other amps, honestly think that the whole point of the P1 was to have the space saving dac and amp within the one unit, if i was gonna attach something onto the P1 i'd rather have gotten the CLAS setup, atleast it looks clean because most likely it'll be as fat as that lol -__-"

 

ultimately looking for dac/amp setup like the P1 but will allow dac to be used when connected to a non iDevice, the upcoming iBasso D7 looks damn promising!!!!!!!!!!!!!!!!!!!

post #147 of 1291

Agreed. However I didn't know the result until after buying P1, and my colleague allowing me to borrow his Predator. There simply isn't enough P1 reviews out there to help one make a decisive purchase. So in a way I am trying to provide feedback to potential P1 buyers to know what to expect. As for the CLAS, as such my response to GuyD in post #143. But I don't wanna blindly trade the P1 for CLAS yet without testing.

 

The same with the Go-DAP. It's new, there aren't (m)any reviews out there and I'm prepared to be an early adopter to provide my feedback.

post #148 of 1291
Thread Starter 
Quote:
Originally Posted by foxyboy View Post

U mentioned using P1 dac + other amps, honestly think that the whole point of the P1 was to have the space saving dac and amp within the one unit, if i was gonna attach something onto the P1 i'd rather have gotten the CLAS setup, atleast it looks clean because most likely it'll be as fat as that lol -__-"

 

There are definitely categories of portability.  For me, I wouldn't want to carry much more than a DAP for walking or traveling- well, maybe something like a PicoSlim or Headstage Arrow.  But for walking to the corner store I usually just grab my Nano.  My HP-P1 is part of my 'around the house' transportable, so I don't mind it being a brick.  smile.gif  I think of it as a desktop/ bedside rig where I am not anchored to either.  I really think that for amps, while there are certainly 'good' ones, it's more a matter of matching (impedance) to the right IEM or can.  So if you plug into the HP-P1 and it happens to sound great, then you're set.  Otherwise, you may need to stack another amp after it- same with the CLAS.  The nice thing about this kind of modular setup is that you can change amps depending on need- it's like home audio.  All of this, of course, is if you can deal with the size and cost.

 

To my deaf ears, the DAC does not make much of a difference- not nearly as much as the amp does, good or bad.  So in the case where you want to keep your platform options open, I would probably lean towards just getting an amp or USB compatible DAC/amp.  (I haven't done any research, but can any of these other DAPs do USB digital to a DAC?)

 

As for iOS 5, against my better judgement I went ahead and did it to my 4G Touch.  So far, no issues whatsoever.  It takes time as others have mentioned.  But all is well.  One thing I did notice was that before (iOS 4.3) when you turned on the HP-P1 it would wake up the iPod and the volume slider in the player would disappear, indicating that it was disabled as it was no longer needed since the iPod was in line out mode.  Now with iOS 5, the volume slider remains; but it is it's own setting or output specific.  In other words, when the HP-P1 is used you will see the volume where it was when it was last in this mode.  Then when you turn the HP-P1 off, the volume will move back to where it was when the iPod was running stand alone.  In the former case, the volume does not affect what comes in/out of the HP-P1.  In fact, I'm not sure what the volume does in that case.  I tried to see if it meant that you could listen to the HP-P1 and the iPod headphone out at the same time, but that is not the case.  Maybe it means if you had the proper cable you could control the volume of the analogue line out while using the HP-P1?  Or maybe it was just an oversight.  Either way, you can just ignore the slider completely.

post #149 of 1291

Now, there's a few pics i've took some days ago, hp-p1>iPhone 4>UM Miracle:

_DSC0143.JPG_DSC0148.JPG

_DSC0141.JPG_DSC0150.JPG

 

Oh..and i really don't get it why people are whining about the hp-p1 amp, there's really no need of attaching a brick to it L3000.gif, it's more than enough...


Edited by Vitor Teixeira - 10/13/11 at 11:54am
post #150 of 1291
Thread Starter 
Quote:
Originally Posted by Vitor Teixeira View Post

_DSC0141.JPG

 

Oh..and i really don't get it why people are whining about the hp-p1 amp, there's really no need of attaching a brick to it L3000.gif, it's more than enough...


You couldn't come up with a better match aesthetically.  Gorgeous! 

 

I think some of the comments about the amp might be due to impedance matching issues with multi-driver IEMs.  And I don't think it's a problem just limited to the Fostex.  Between the amps that I have or have tried, there will usually be some combinations that sound better or preferable.  Quite often I consider the changes to be of a lateral nature- other times I don't like the changes.  And it's hard to generalize: I don't like the TripleFis (3 BAs) straight out of the Fostex, but I really like the W4s (4 BAs) out of it.

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