ALO Rx AMP

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ALO Rx AMP; Updated
Topic Started: 7 Aug 2009, 04:50 PM (368 Views)
ahdui	7 Aug 2009, 04:50 PM Post #1
aux! Posts: 5,256 Group: Administrator Member #1 Joined: 15 October 2006	TouchMyApps Part of the secret of this amp is its new-fangle chips. One of them is a new type of digital volume control with two gain settings. Ken explained that the volume chip hasn’t been seen in portable amps before, which makes this new project an even welcomer secret. Ken had the following to say when I asked why he is targeting the iPhone market with his new product: The iPhone is really putting portable audio in the hands of so many people that would otherwise have not been into higher end portable audio. So I wanted to cater to them. Besides, with the footprint of the amp [which is still unnamed] it works well with all ipods. ALO are also utilising dual power sources: two 3,7 volt rechargeable Li-On batteries which should supply tonnes of power for headphones of all flavours, from the ultra-sensitive IEM more power-hungry circum-aural headphones. The amp’s dimensions will be 2,5 * 0,5 * 4,2 inches of extruded aluminium in a choice of red, black, or silver. - High output power - a minimum of 5.5V RMS and over 100mA of output current, so can easily drive any headphones. - The ALO Audio amp has a real bi-polar power supply not a rail splitter… - Long-lasting, rechargeable battery - The ALO portable 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; 20Hz - 20kHz ±0.1dB @ 1V out * Maximum output: 5.25V RMS * Output source impedance: Less than 1Ω * THD+N: 0.004% @ 1V RMS out into 150Ω or 33Ω * 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: 2X / 5V (switch-selectable), ±<0.5dB * Dimensions: ~4″ long x ~.5″ wide x ~2.5″ thick
	Transportable: iRiver h120(2300mAh)→Sysconcept Optical Cable→AOS Electornics Co. Piccolo DAC→ahdui's CryoFreeze™ TCu IC→ahdui's Enfo PA-1→Custom Shure SE530 Backup: AMB y-1 DAC (MisterX Mod) Cycling: Sansa Clip 4GB→Philips SHS3200 Earhooks Portable: Rio Karma→UltimateEars Super.Fi 5eb Backup Rig: RedWineAudio 40GB iPod Photo→ahdui's CryoFreeze™ RBT IC→iBasso P3 Heron(ahdui Mod) →Custom Shure SE530 Home: "Upgrading In Progress"→Alessandro MS Pro/JVC HP-DX1000 Desktop: PC→Belden 1505F→CityPulse DAC 7.2x II→Belden 89207→KRK Rokit Powered 5


theory_87	7 Aug 2009, 05:37 PM Post #2
I Need More Money To Spend Posts: 951 Group: Members Member #14 Joined: 15 October 2006	Seems like most manufacturers out there is going with the slim trend...
	Source: Sansa Clip x 2 \| iAudio U2 \| Rio Karma \| iPod Nano 4GB Gen 1 x 2 \| iMod 60GB iPod Photo \| iPod Gen 5.5 x 2 \| iRiver H140 \| HP Pavilion dv6121TX Amp: Xin SuperMicro IV \| theory_87's DPA1 \| iBasso D10 Modded \| iBasso fi.Quest \| Onkyo TX-SV919THX \| Yaqin CD1 Tube Buffer w Mullard E88CC \| AMB CK²III Heaphone/IEM/Speaker: CrossRoad MylarOne X3 \| SoundMagic PL30 \| Modded Altec Lasing im716 \| Fischer Audio Eterna w modified UM56 \| Custom Ultimate Ears® super.fi 5 Extended Bass™ \| Custom Ultimate Ears® #4/1000 triple.fi 10 Pro™ + mid driver\| ACS T1 \| JBL PS100 & Yamaha VS10M Others: xxx red series 3.5mm & RCA IC \| DIY HGA 3.5mm IC \| DIY Jena Cryo 3.5mm IC \| DIY ALO SXC 3.5mm IC \| Custom Optical IC \| Ridox contact protector/enhancer \| DeoxIT ProGOLD \| Mapleshade SilClear


Fongalv	8 Aug 2009, 12:14 AM Post #3
What member? Posts: 1,998 Group: Member Member #7 Joined: 15 October 2006	But...the iPhone is primarily a phone isn't it... everytime your phone rings, you got to bring the entire brick+dock/IC up to your ears... everytime you receive a sms, you got to pull the whole rig out... Is there some new and novel way of using the iPhone that I'm unaware about? Somehow feels like the functions don't mate all too well, even if the form does... Hope the iPhone does not emit too much interference either ...
	Music, without life is lame...Life, without music is crippled... -------------------------------------------------------------------------------------------------------------------------------------------------------- Rigs(outdated image): 32Gb S9 →SMicroIV → e500C → me 2200mAh H140(RB) → Grover S → SMacro3v6/Diablo → e500C → me Philips CD850(circa '90s!) → 1694A → DA7.2x(TCXO) → Grover UR8 → SP MPX3 SLAM → '03 DT880 / DBE V3 → me Bushguy @ Head-fi Fongalv can have my firstborn in trade for his pair(of Darths)... --------------------------------------------------------------------------------------------------------------------------------------------------------


nofing	8 Aug 2009, 12:00 PM Post #4
Posts: 423 Group: Members Member #663 Joined: 22 March 2007	Maybe it's meant to be used with IEMs with mic like the hf2 and using a special ALO dock you can receive a call using the hf2 and the amp will send the voice signal back to the iphone. Sounds incredible. Lol!



theory_87	8 Aug 2009, 03:15 PM Post #5
I Need More Money To Spend Posts: 951 Group: Members Member #14 Joined: 15 October 2006	nofing 8 Aug 2009, 12:00 PM Maybe it's meant to be used with IEMs with mic like the hf2 and using a special ALO dock you can receive a call using the hf2 and the amp will send the voice signal back to the iphone. Sounds incredible. Lol! I was thinking of that too. But I highly doubt so.
	Source: Sansa Clip x 2 \| iAudio U2 \| Rio Karma \| iPod Nano 4GB Gen 1 x 2 \| iMod 60GB iPod Photo \| iPod Gen 5.5 x 2 \| iRiver H140 \| HP Pavilion dv6121TX Amp: Xin SuperMicro IV \| theory_87's DPA1 \| iBasso D10 Modded \| iBasso fi.Quest \| Onkyo TX-SV919THX \| Yaqin CD1 Tube Buffer w Mullard E88CC \| AMB CK²III Heaphone/IEM/Speaker: CrossRoad MylarOne X3 \| SoundMagic PL30 \| Modded Altec Lasing im716 \| Fischer Audio Eterna w modified UM56 \| Custom Ultimate Ears® super.fi 5 Extended Bass™ \| Custom Ultimate Ears® #4/1000 triple.fi 10 Pro™ + mid driver\| ACS T1 \| JBL PS100 & Yamaha VS10M Others: xxx red series 3.5mm & RCA IC \| DIY HGA 3.5mm IC \| DIY Jena Cryo 3.5mm IC \| DIY ALO SXC 3.5mm IC \| Custom Optical IC \| Ridox contact protector/enhancer \| DeoxIT ProGOLD \| Mapleshade SilClear


ahdui	13 Oct 2009, 09:14 PM Post #6
aux! Posts: 5,256 Group: Administrator Member #1 Joined: 15 October 2006	The name is out. Its called the "Rx AMP" Top View Front View Back View 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
	Transportable: iRiver h120(2300mAh)→Sysconcept Optical Cable→AOS Electornics Co. Piccolo DAC→ahdui's CryoFreeze™ TCu IC→ahdui's Enfo PA-1→Custom Shure SE530 Backup: AMB y-1 DAC (MisterX Mod) Cycling: Sansa Clip 4GB→Philips SHS3200 Earhooks Portable: Rio Karma→UltimateEars Super.Fi 5eb Backup Rig: RedWineAudio 40GB iPod Photo→ahdui's CryoFreeze™ RBT IC→iBasso P3 Heron(ahdui Mod) →Custom Shure SE530 Home: "Upgrading In Progress"→Alessandro MS Pro/JVC HP-DX1000 Desktop: PC→Belden 1505F→CityPulse DAC 7.2x II→Belden 89207→KRK Rokit Powered 5


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