JDS Labs EL AMP II+ – Headphone Amplifier

JDS Labs EL AMP II+

JDS Labs EL Amp II is now EL Amp II+, following the same chipset upgrades applied to Atom Amp+. EL Amp II+ increases SINAD from 114dB to 119dB at low gain, and from 105dB to 110dB at high gain. All other parameters measure similarly. EL Amp II+ packs the performance you expect from JDS Labs into a precision machined aluminium chassis. Enjoy the comfortable knob and seamless transitions between your powered speakers and headphones.

Amplification circuitry and PCB layout are inspired by Atom Amp, with greater PCB surface area dedicated to amplifier thermal relief and greater output power. Higher noise tolerance NJR opamps are utilized in the voltage gain stage, along with thin film resistors for tighter channel matching. In short, this means less variation from one amp to another.

EL Amp II+ accepts up to 2.2VRMS at high gain, well matched to EL DAC II’s 2.0VRMS output. Low gain is set to unity for for sensitive headphones. Volume is controlled by an Alps 9mm potentiometer with optimal 15A taper.

Perfect audio, simplified.

Preamp Outputs
EL Amp II+ provides preamp RCA outputs, so that you can control volume of your powered speakers.

Output Selection
The Mode button allows you to toggle between headphones and powered speakers without the need to disconnect cables.

Ultra High Power
With +/-15VDC rails and continuous max power of 1.3W, EL Amp II+ drives all headphones on the market to extraordinary levels, from balanced armatures to planar magnetics.

Top Performance
EL Amp II+ is JDS Labs’ flagship amplifier, achieving top performance from its 4-layer, star grounded layout.

Dual Gain
Low gain of 1.0x is well suited to driving efficient IEMs, while High gain easily powers demanding full size sets.

Relay Muting
Designed for desktop listening, EL Amp II+’s full relay muting eliminates pops and thumps during startup through both its headphone and preamp outputs.