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ALO Pan Am desktop/portable headphone amp/DAC: Impressions and Reviews - Page 5

post #61 of 844

I have been feeding my dragonfly DAC into the Pan Am. That way, I can do quick A/B tests by simply unplugging the 1/8 inch and plugging in my IEMs into the dragonfly. I did also try AB testing between the Pan Am DAC and the Dragonfly. In both instances, the Pan Am has little or no impact in the bass, while the dragonfly punches substantially. The difference is dramatic. The Pan Am sounds nice across the spectrum, but very weak in the bass. I allowed the Telefunken tubes  to burn in for around 20 hours before doing the A/B tests. The stock tubes have had little or no burn in, but with both tubes, the bass is quite disappointing.

post #62 of 844

Did anyone try installing ASIO driver like this one? Available for both Windows and Mac users

 

http://www.usb-audio.com/download.html

post #63 of 844
What's the impedance of your IEMs?
post #64 of 844
Quote:
Originally Posted by FatmanSize48 View Post

What's the impedance of your IEMs?

I've been using Westone 4 and UM3X IEMs with the Pan Am which are 31/56 ohms respectively. 

post #65 of 844
Shizgeo in his (amazing!) interview stated that the Pan Am worked best with 50-600 ohms. Most other reviews I've read seem to back up this point, and said that the Pan Am underperformed with lower impedance headphones. Do you have any other headphones to use with them?
post #66 of 844
Quote:
Originally Posted by FatmanSize48 View Post

Shizgeo in his (amazing!) interview stated that the Pan Am worked best with 50-600 ohms. Most other reviews I've read seem to back up this point, and said that the Pan Am underperformed with lower impedance headphones. Do you have any other headphones to use with them?

not currently. But I do plan on getting the LCD-2 sometime next year. I currently live in an apartment with uni students, so open ear cans are useless. I've ordered an Heir Audio 8.A, but that is not above 50ohms. 

If the bass response of the Pan Am is not better with the 8.A, I the amp will have to work hard as a (pretty cool looking) desk ornament until I get my own place in Vancouver and the Audeze cans next year. 

 

I noticed the specs of the Pan Am were a little odd when I checked them out the other day: 40hz-30khz. Does anyone know why ALO would choose to drop the last 20hz or the audio spectrum? I thought it had something to do with the tubes, but I checked other tube amps such as the woo-audio tube amps, and many of them go far below 20hz. 

post #67 of 844
That's really wierd. I wonder where that last 20hz went. So yeah, with IEMs, the Pan Am is not at its best. Maybe Santa will drop you a pair of HD650s or LCD-2s
post #68 of 844
Thread Starter 

If ind that no mains-powered or mains-based amps are that good for IEMs. The DACmini 1Ω mod is good, but still, portable earphones do best with portable amps. That said, the Pan Am is spice... wonderful spice for every flavour of portable headphone, high Ω earphone, and proper headphone. Again, it is powerful, can be rolled, and just works. Christmas presents: get the Pan Am for your new phones. 

 

My favourite match still is the LCD3 and the DT880, though I find the ESW11LTD to be pretty good too! BTW, Palchiu sent me a set of Telefunken (or OEM clones), and I'm enjoying them heaps. This little amp really has a lot going for it. A lot. 

post #69 of 844

After much umming and ahhing I had to search high and low for a setup that matched the musical leanings of my home hifi (that I will sadly have to leave behind as I move halfway across the world :()

 

Impressions with the DT770 Pro are:

 

- Tighter bass amped than un-amped

- Even larger soundstage

- Super compact, plays nicely with Windows 8

 

post #70 of 844
Quote:
Originally Posted by GarySaville View Post

I noticed the specs of the Pan Am were a little odd when I checked them out the other day: 40hz-30khz. Does anyone know why ALO would choose to drop the last 20hz or the audio spectrum? I thought it had something to do with the tubes, but I checked other tube amps such as the woo-audio tube amps, and many of them go far below 20hz. 

Many other amp makers list their specs as +/- 3dB or -3dB.  The ALO Pan Am is listed as +/-1 dB.  So, unless you can see the frequency responses plotted out on a graph, you cannot totally understand the differences.   Keep in mind that a 3 dB drop in audio is half the sound energy being output. So, ALO is listing the spec where the amp is essentially ruler flat or down by not more than one third. That does not mean that the Pan Am cannot output 20Hz, it just means its rolled off a bit, which is not unheard of for a tube amp.  The Pan Am may very well measure similar to an amp rated on a 3dB slope 20-30KHz at +/-3 dB the other amp could be down by half power at 20Hz. 


Edited by bsn - 12/17/12 at 8:04pm
post #71 of 844

anyones pan am have the left socket too close to the inner socket cutout in the housing causing the tube to lean up against the cutout in the housing?  if you put the tube cover on it forces the tube to sit in crooked, and it doesnt just sit in, but snaps in, unlike the right tube.

 

kinda poor machining for a $600 device.

 

was planning to complain but dont know if i should.


Edited by max pl - 12/18/12 at 9:29am
post #72 of 844
Quote:
Originally Posted by max pl View Post

anyones pan am have the left socket too close to the inner socket cutout in the housing causing the tube to lean up against the cutout in the housing?  if you put the tube cover on it forces the tube to sit in crooked, and it doesnt just sit in, but snaps in, unlike the right tube.

 

kinda poor machining for a $600 device.

 

was planning to complain but dont know if i should.

Yes, mine is the same. The circuit board is skew and as a result, the tube on the left hand side of the unit touches the chassis. 

post #73 of 844
Thread Starter 

Mine has no problems with either valve slot. The only problem I have is using the batteries up sooo damn fast as I love the Pan Am for music, movies, and for when brainstorming, which is like all day.

post #74 of 844
Quote:
Originally Posted by GarySaville View Post

Yes, mine is the same. The circuit board is skew and as a result, the tube on the left hand side of the unit touches the chassis. 

Hmm...me too. I considered sending it back, but....it's just too darn enjoyable. It doesn't detract from listening at all, so I guess it doesn't really matter much to me. 

post #75 of 844
Quote:
Originally Posted by FatmanSize48 View Post

Hmm...me too. I considered sending it back, but....it's just too darn enjoyable. It doesn't detract from listening at all, so I guess it doesn't really matter much to me. 

I won't be parting with mine either, though it is getting sidelined for while since I only have IEMs and I do not think the Pan Am is suitable for IEMs. I plan on buying the Audeze LCD2 or 3. Several reviews I've read have praised the match, so I'm going to hold-on to the Pan Am.

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