CHANGSTAR: Audiophile Headphone Reviews and Early 90s Style BBS

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Author Topic: Planning system based 'round Paradox/cheap/pocketable... seeking advice  (Read 2575 times)

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Synnöve

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Hi, I'm that person you don't know.

I used to own a K701 with a Dark Voice 336i, and I viewed myself as hot stuff. After a driver went out, I bought an old Audio Technica electret with a transformer box, and powered it with an old 70's double monoblock. I thought I was the shit. After the transformer gave up the ghost, I'm left with useless cans and one lone Klipsch speaker being powered by the line out from my sound card. My organ and film scores are mono, my film watching is riddled with distortion, my music not portable due to my lack of mobile cans...

Dear, have I let myself go.

So here is the heart of matter: the Paradox seems to be one of the best closed cans money can buy, given it's low distortion, even keeled freq response, isolation, planar drivers, and reasonable power requirements. I reason it would make an excellent can for at home use, and on the bus use, for music of all sorts and films. Easy choice.

Sources will consist of my PC and Galaxy Nexus. Someday in the future, Smyth Realiser will be added to this list *drools*. Another easy choice.

Amplification is the tricky choice. The requirements include being svelte/pocketable, powerful enough for classical and tracks with high dynamic range, low distortion, reputation for no BS products/documentation, USB DAC of competent quality is fancied as well (16-48 is fine for my purposes), digital volume control is preferred, and sexual potency.

Objective2 meets my criteria for knowing exactly what I'm getting vis-a-vis measurements and documentation, low distortion, but it falls rather short in the other departments; I hear it could use a bit more power for phones of the planar magnetic variety, and it's boxy frame wouldn't go with my slim fit suits! I've heard good things about the UHA-6S MKII, but it's a bit pricey and adds a giant volume pot to the party, in addition to unneeded spdif. JDS Labs has the C5, which meets most of the requirements aside from its large physique and power output. Headamp has the Pico slim... nice save for the lack of DAC and price. I briefly glossed over the UHA-4 which meets most of my requirements, but I'm unsure if it has enough gusto in the driving department. Maybe I should re-evaluate some of these options? Do I require a DAC for on-the-go duties or is the analog-out on my Galaxy Nexus up to task? Is it unreasonable of me to expect sensual qualities in my audio equipment?

Home duties will be taken care of by my dual-monoblock speaker amp, so this amplifier/dac/whatchamagic need not be the best thing ever.

I also have another idea up my sleeve (french cuffed, of course): if the pocket-able amp has a USB DAC, I could in theory attach a blue-tooth receiver to it, and use my phone's blue-tooth radio for wireless communication? I don't fancy the thought of having to deal with wires to and from my mobile when on the go.

Anyway, that's the entirety of it. Should any of you fine, eye-patch laden folks have some recommendations or ideas superseding what I've put out, I'd love to hear!
« Last Edit: April 05, 2013, 11:03:29 PM by Synnöve »
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The human brain is one of the lowest entropy structures known to exist. Given it's unfathomable links, connections, and operations, how can we have such brash confidence in our ability to accurate claim causation when it comes to auditory phenomena?

Marvey

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Schiit Magni. Better gain and power characteristics than O2, especially for orthos.
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Synnöve

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Hello Purrin! I'm a great fan of your work in measuring and quantifying headphone response.

I've very much look fondly upon the Schiit Stack. If my monoblock dies (power caps from the 70s last only so long!) I'll invest in one for home use. I'm currently inquiring about pocket-able/portable systems. apologies if that wasn't clear in my post!
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The human brain is one of the lowest entropy structures known to exist. Given it's unfathomable links, connections, and operations, how can we have such brash confidence in our ability to accurate claim causation when it comes to auditory phenomena?

Marvey

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Leckerton UHA-6 on high gain setting - should work with Paradox. The guy who makes the UHA-6 also takes a lot of measurements of his gear. It measures good and it sounds good. A USB DAC is also included with the UHA-6.
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Hands

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Second on the Leckerton. Modded T50RPs in general work great with it on high gain. However, some albums might just be below your preferred volume depending on how they were recorded and mastered. Most modern albums get plenty loud with it, though. I believe it's recommended to go with the 209 opamp, right?
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Maxvla

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The Pico is available in a DAC/amp: http://www.headamp.com/pico/pico_dac_amp/index.htm
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Solderdude

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Pico datasheet says:

Output Resistance: less than 1 ohm
Output Voltage: 8V peak-to-peak, 2.84Vrms
Output Power:    0.7Wrms with 32 ohm load

They are selling an amp which puts out less power than they say it will .... if their output voltage rating is correct  :-[

2.84Vrms into 32 Ohm = 0.25W instead of the stated 0.7W (700mW)
Into a 50 Ohm paradox the output power = 0.16W (160mW)

Paradox needs about 1.2mW for 90dB so at 0.16W you will be able to reach 111dB
Consider that average levels would be about -10dB you will still end up with a respectable 100dB S.P.L.

The Leckerton UHA6s mkII will put out 0.06W (60 mW) in 50 Ohm loads = 107dB (thus average music levels of around 97 dB)
Still plenty loud... and with loudness wars material the average level will be around 100dB.

Of course these numbers say ABSOLUTELY nothing about sonic qualities, only the max SPL the Paradox can reach.
« Last Edit: April 06, 2013, 08:14:54 AM by Solderdude »
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justin w.

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you're right, it is wrong on the website. the manual has it correct though.  i haven't touched those pages in years and this is the first time it's been mentioned
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Hroðulf

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Judging from what Tyll has posted lately the Pico has some pretty respectable THD figures. At least on par with the O2.
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Synnöve

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Thank you for the advice everyone!

The Pico would be ideal in terms of power requirements, but it's not as slim or value laden as the UHA6. As such, I'm fancying the UHA6 for the most part, but I'll wait a few months and see if Leckerton has some slimmer, more powerful pieces in the pipeline (digital volume would be nice!).
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The human brain is one of the lowest entropy structures known to exist. Given it's unfathomable links, connections, and operations, how can we have such brash confidence in our ability to accurate claim causation when it comes to auditory phenomena?
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