The RHA DacAmp L1 is very versatile as it has so many inputs and outputs. It’s important to know that the balanced output will not work when you’re using the 3.5mm input. It’s also important to know that the order of the outputs is as follows: headphones, line-out, mini-XLR.
Something that isn’t very obvious either is that you need to install a specific RHA driver in order for the L1 to work as a USB-Dac on your Windows PC: You can find that driver here.
Operating the treble and bass buttons is very easy and once you know how the L1 works, operating it – taking into account the above information – is very easy. In order for the L1 to serve as a portable battery for your devices you simply set the gain switch to the lightning sign et voila. Hooking the L1 up to one of the AK DAPs as external DAC also immediately worked from the first try and that certainly isn’t always the case. The new Fiio X5iii is supposed to support USB OTG but I so far haven’t been able to get it working with the AK380, ALO CDM and L1. It does work with the Chord Hugo (Hiby), I’m looking into this and I hope to get the L1 working with the X5iii soon.
The RHA DacAmp L1 is very powerful and with a lot of my inears & monitors I can only use a millimeter or 2 on the volume dial, luckily there’s no channel imbalance. When you’re using a source with configurable output volume that’s not an issue but when using the USB OTG of the AK70 the volume always is maxed out. But yes, the L1 with normal and easy to drive ear/headphones is LOUD. The unit gets a little bit warm during playback but it stays fairly “cold” in general, no issues with the heath such as with the Mojo in example.
The following impressions are based on using the single ended 3.5mm output and the DAC part of the L1 in combination with my laptop. Check out the CL1 in the “Synergy” part for more impressions of the balanced mini-XLR output and keep reading to get an idea of the AMP-section only.
First things that come into mind when listening to the DacAmp L1 are: Power, body, energy. The DAC and amp combined deliver a very full bodied sound in bass and mids. The L1 manages to produce a detailed yet musical sound at all times, but it’s also one that’s full of energy. The L1 is fast with a sharp attack and it sounds like it had a lot of sugar, I mean that in the best possible way however. The L1 is dead silent and has a nice black background. There’s no other noise from the volume dial or the other dials for that matter either.
Going by the ear I do find the L1 to be a linear amp (not touching the EQ) and it doesn’t boost bass, mids or treble like some other amps do (not touching the EQ). The ES9018K2M chip is known for getting a lot of detail out of the digital file and it does exactly that. At the same time the L1 manages to output that detail in a musical way. The L1 is very much “solid state” sounding; it’s not warm, soft, smooth or laid back but it’s right on top of things with excellent separation, precision, dynamics and speed. Sound stage width is good but I do find it to sound wider than it is deep, yet depth is good also. Especially with HQ files the layering on the L1 is sublime. Some might call the L1 slightly darker sounding, but I wouldn’t state it’s a dark amp at all.
All in all I’d say the DacAmp L1 is a neutral tuned unit but one that’s presenting the music in a very full bodied way. Some might not find it neutral because of that but I do think the combination of both is perfectly possible. Bass is tight, fast and punchy and is never exaggerated. It goes reasonably deep but there’s not as much rumble down low as with some other amps. The bass and mids are perfectly separated and the mids are rich, addictive and musical. Unlike with a lot of the new amps, the voices are in perfect harmony with the rest of the sound. Treble is good, never harsh (unless you’re using really bad quality files), fast, precise and dynamic. It’s not the most extended but it in no way is rolled off. This is the typical to the point treble of the ES9018K2M chip and one a lot of SS amplifiers produce. It perfectly fits in with the bass and treble; the L1 simply produces a good, balanced and complete sound with excellent L/R separation.
Of course the DacAmp L1 comes with a bass, treble and gain switch but I have to admit I only use it with the CL1 IEM. So far I haven’t really found the need to switch the gain setting and the only changes I did was add +1 bass and deduct -1 treble with lesser quality recordings when listening to the RHA CL1 IEM. Setting or using the bass and treble is easy, I’m not the biggest fan but if you are you’ll certainly be pleased with this 12-step EQ possibility.
Line In. I recently started using the Music Sanctuary Quartette IC’s after my ALO IC’s died on me after years of intensive use. When bypassing the L1’s DAC and using the 3.5mm “Line In” the sound from the L1 is clear, detailed and precise with good, yet less, body than before. In that regard it’s a more neutral sound reproduction but for the rest the sound is very comparable. I Personally prefer the L1 when using it as a Dac/Amp combo as it was intended to be used.
If you feel your AK DAP doesn’t have enough power, hooking it up to the L1 might be the solution for you. Of course you’ll get a different sound signature as you’re used to from your AK but I really like the synergy this setup has. Great bass (a little more than neutral) with good body, rich mids and treble that makes you feel alive. It’s not as laid back as the AK70’s sound but the combination simply works well. When connected to my good old Samsung S4 over USB (Hiby player and ASEN OTG cable) it transforms the S4 into one hell of a music player. The difference in SQ with and without the L1 is huge and once you’re used to the S4+L1 combo, you don’t want to go back to listening to music without then L1. Same story goes for the iPhone 6S although I find its proper SQ to be quite good already, or way better than that of the S4 anyway.
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