08-27-2009, 10:58 PM
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Join Date: Jan 2006
Location: Stump Town
Posts: 1,007
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Introducing the ALO Rx AMP
We have been working hard for many months now to bring to our customers the ALO Prescription (Rx) Headphone amplifier.
Designed from scratch, the ALO Rx is utilizing dual power sources: two 3,7 volt rechargeable Li-On batteries which should supply tons of power for headphones of all flavors, from the ultra-sensitive IEM more power-hungry circum-aural headphones.
The amp’s dimensions will be a super small 2.5 * 0.5 * 4.2 inches of extruded aluminium in a choice of red, black, or silver.
Further Details
* High output power - a minimum of 5.25V peak to peak and over 100mA of output current, so can easily drive any headphones.
* The ALO Audio Rx has a real bi-polar power supply not a rail splitter…
* Long-lasting, rechargeable battery - The ALO Rx contains dual lithium-ion battery which will power the amp for more than 15 hours at typical listening levels. It recharges in about 2 hours from an external wall-wart charger. You can also operate it while plugged in to keep the battery topped off. Uses a proprietary DEDICATED battery supervising / charging IC.
Specifications:
* Frequency response: ±1dB; 10Hz - 20kHz ±0.1dB @ 1V out
* Maximum output: 7.45V Peak to Peak
* Output source impedance: Less than 1Ω
* THD+N: 0.004% @ 1V RMS out into 24Ω
* Broadband noise: <10μV RMS, unweighted, integrated over 20Hz - 20kHz
* Output DC offset: <3mV
* Input impedance: 40kΩ
* Maximum input level: 5V RMS
* Channel tracking (gain difference between channels, all volume steps): <±0.2dB
* Gain: 1.5X /6X ---5V (switch-selectable), ±<0.5dB
* Dimensions: 4.2″ long x 2.5″ thick x 5″ wide
I have a initial run of these being made right now and are due to be ready for sale some time in early October. These will come with a wall wart charger good for use in any country. The working prototype went through several tweaks and the final product has proven to be truely a world class portable headphone amp, we are more than thrilled.
More info soon.
Thank you
Ken
Last edited by KB; 08-28-2009 at 02:17 AM.
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08-27-2009, 11:57 PM
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Headphoneus Supremus
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Join Date: Apr 2006
Location: Los Angeles, CA
Posts: 4,905
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Just a clarification of the specs:
Looks cool. Do you know what the price will be yet, and can you talk some more about the internals?
__________________
Team Musical Truth Headphones ☊ → Sennheiser HD800 (modified) + APureSound V3 XLR w/ Rhodium Furutech + Q resistance adapters (on occasion)
DAC → Audio-gd Reference One DAC ::: Transport/Source → Logitech Transporter (w/ iPod Touch controller) :::
Amp → Audio-gd Phoenix ::: Coming soon: Balanced ß22 + σ22 (custom dual chassis)
Power → PS Audio Power Plant Premier ::: Virtual Dynamics Master LE 2.0 + Power 3 ::: Locus Design Group Axis ::: Audio-gd Exclusive (x2)
::::::::::::::: PS Audio Noise Harvester ::: Cobalt Cable Ultimate Power
Interconnects → Blue Jeans Cables BNC ::: Audio-gd Sharkwire silver CAST & XLR ::: Locus Design Group custom CAST & DC power cables
FOR SALE:
Audio-gd Phoenix balanced headphone amplifier/preamp $940 + shipping
Last edited by KB; 08-28-2009 at 12:51 AM.
Reason: removed the typo info
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08-28-2009, 12:51 AM
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Join Date: Jan 2006
Location: Stump Town
Posts: 1,007
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Quote:
Originally Posted by IPodPJ
Looks cool. Do you know what the price will be yet, and can you talk some more about the internals?
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Cool thanks for alerting me to the typos... I will try and get more info soon.
Ken
Last edited by KB; 08-28-2009 at 01:06 AM.
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08-28-2009, 02:29 AM
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100+ Head-Fi'er
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Join Date: Aug 2008
Location: North Georgia Mountains
Posts: 408
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Looks sweet and perfectly thin to mate with an iPod/iMod! Cant wait to see a real one!
__________________
Amps: ALO/RWA Amphora, Meier 2Move, Total Airhead
Headphones: ESW9
Source: iPod, 2Move
Alone in my room, lights off, tubes aglow and music flowing, I discovered something. No matter how much hi-end gear I put between the recording and my ears, its the music that moved me to tears. Less is always more.
Kevin
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08-28-2009, 03:36 AM
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100+ Head-Fi'er
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Join Date: Aug 2008
Location: North Georgia Mountains
Posts: 408
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HAHAHAHAHAHA I just got the name. Am I slow or what?
__________________
Amps: ALO/RWA Amphora, Meier 2Move, Total Airhead
Headphones: ESW9
Source: iPod, 2Move
Alone in my room, lights off, tubes aglow and music flowing, I discovered something. No matter how much hi-end gear I put between the recording and my ears, its the music that moved me to tears. Less is always more.
Kevin
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08-28-2009, 04:33 AM
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Join Date: Jan 2006
Location: Stump Town
Posts: 1,007
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Quote:
Originally Posted by kboe
HAHAHAHAHAHA I just got the name. Am I slow or what?
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Tee hhehe 
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08-29-2009, 04:19 PM
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100+ Head-Fi'er
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Join Date: Aug 2008
Location: North Georgia Mountains
Posts: 408
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The input and output jacks look a little close, would your larger connectors still fit?
__________________
Amps: ALO/RWA Amphora, Meier 2Move, Total Airhead
Headphones: ESW9
Source: iPod, 2Move
Alone in my room, lights off, tubes aglow and music flowing, I discovered something. No matter how much hi-end gear I put between the recording and my ears, its the music that moved me to tears. Less is always more.
Kevin
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08-29-2009, 05:50 PM
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Join Date: Jan 2006
Location: Stump Town
Posts: 1,007
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Quote:
Originally Posted by kboe
The input and output jacks look a little close, would your larger connectors still fit?
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Kobe,
The distance is a standard. One Canare F12's should be fine with another Neutrik, not not 2 F12's.
Thanks
Ken
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08-29-2009, 09:43 PM
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100+ Head-Fi'er
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Join Date: Aug 2008
Location: North Georgia Mountains
Posts: 408
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Maybe it just looks close in the rendering. Thanks
__________________
Amps: ALO/RWA Amphora, Meier 2Move, Total Airhead
Headphones: ESW9
Source: iPod, 2Move
Alone in my room, lights off, tubes aglow and music flowing, I discovered something. No matter how much hi-end gear I put between the recording and my ears, its the music that moved me to tears. Less is always more.
Kevin
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08-31-2009, 02:16 AM
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500+ Head-Fi'er
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Join Date: Sep 2006
Location: London, UK
Posts: 916
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Thanks for your sharing.
__________________
Gear I: MacBook Pro 17" Optical --> Creative DD/DTS DAC --> Ultrasone HFI-650 (Old), Shure SRH840
Gear II: Sony Vintage D-171/D-E301/'iPod 5.5G Docked out In-line Volume Control' --> E500s, HFI-650 (Old), SRH840
An Audio Purist Would Always Be An Audiophile
Head-Fi eBay
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09-14-2009, 06:10 PM
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Join Date: Jan 2006
Location: Stump Town
Posts: 1,007
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We are in the process of completing the Rx amps now. I will post photos soon.
Ken
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09-14-2009, 06:24 PM
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Member of the Trade
Red Wine Audio
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Join Date: Feb 2005
Location: Meriden, CT
Posts: 465
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I had the opportunity to listen to a prototype version of the ALO Rx amp - and it sounded VERY good, indeed!
Ken - you are going to sell a boat-load of these, so better order a lot of parts for the first production run.
Congratulations!
Vinnie
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09-14-2009, 11:26 PM
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100+ Head-Fi'er
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Join Date: Aug 2008
Location: North Georgia Mountains
Posts: 408
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Price?
__________________
Amps: ALO/RWA Amphora, Meier 2Move, Total Airhead
Headphones: ESW9
Source: iPod, 2Move
Alone in my room, lights off, tubes aglow and music flowing, I discovered something. No matter how much hi-end gear I put between the recording and my ears, its the music that moved me to tears. Less is always more.
Kevin
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09-15-2009, 07:14 AM
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Join Date: Jan 2006
Location: Stump Town
Posts: 1,007
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Quote:
Originally Posted by kboe
Price?
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Hey kboe
$345 plus SH. I will have some at the RMAF show at my table for sale for $299 (RMAF special!) though so if your going please swing by.
Ken
Last edited by KB; 09-15-2009 at 07:16 AM.
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10-01-2009, 01:29 AM
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Join Date: Jan 2006
Location: Stump Town
Posts: 1,007
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We just got the Rx enclosures in this week and are building. I am going to RMAF and will have them to listen to. When I return from the show I can get some glamor shots up, for now iPhone pics will have to do. We are thrilled with the Rx performance, an easy contender for top portable.
Ken
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