The L.PASS 2.0 is device that combines the functions of preamplifier, volume controller and source selector.
It is an ideal choice for a compact / medium audio system since it allows to connect 4 analog sources on a single power amplifier.
This type of circuit is particularly useful for joining multiple sources especially in any system where Home Cinema & Hi-Fi devices converge on the same set of speakers.
The preamp stage operates in class A with MOS-FET components.
The entire circuit has an oversized linear power supply (60V available against a 40Vppm preamplifier stage dynamics). Either a comfortable reserve to significantly limit the distortion.
All functions are accessible from the front panel: Volume Control / High Gain / Source.
The volume control is operated from a stereophonic ALPS potentiometer on the front panel. This directly drives the MOSFET-based preamp stage.
The L.PASS preamplifier offers three profiles for preamplification : low gain, medium gain and high gain. Respectively: 6dB / 12dB / 18dB on the preamplifier. Note that this parameter affects the input impedance ( > 20K low gain / > 50K high gain).
The class-A circuit is integrated in order to maximize heat dissipation : each FET tube is mounted on its own heatsink and the whole preamplification stage is ideally located under the housing air holes to promote air circulation.
The device has four unbalanced inputs RCA stereo connectors. The source selection is done directly from a button on the front. 4 LEDs with markings act as active source indicator. Note that the marking is not name-based (Ina, Inb, Inc, Ind instead of traditional CD , DAC, TV ... markings)
The source commutation works via a series of relays in order to avoid "thumps" when changing source.
Preamplifier Select source
4 x stereo RCA (unbalanced)
1 x stereo RCA (unbalanced)
6dB (low) 12dB (medium) 18dB (high)
Max output voltage
> 20K (low gain) > 50K (high gain)
linear Regulated 220V AC
58 mm (Height) 220 mm (Width) 190 mm (depth)
L.PASS is delivered alone without any accessory
We deliver all of France, and internationally. To discover the amount of the shipping costs, you just have to go in your shopping cart once the desired products added. To discover our different services and delivery options, click on the following logos: