A couple of months ago, TMA had the unique opportunity to post early specs and spy shots of Audio Line Out’s new amplifier, the ALO Rx. Well, the amp is out now, and available for purchase at 345$. As illustrated in the photos below, it is a slim thing of beauty. But, adding to the fire are some preliminary reports that this amp does indeed sound good. It comes in a variety of colours and sports sophisticated circuitry, some of which hasn’t been seen before in a production headphone amp. TMA’s review of the ALO is done.
More pictures and specs after the gap.
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 17 – 30 hours at typical listening levels. It recharges in about 2 – 4 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. Internal gain switch, tested with high end IEMs and sounds amazing with both full size headphones and IEMs
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
For full spec and more shots, check out ALO’s Rx webpage with photographs from Rocky Mountain Audio Fest (RMAF).