|Are there any plans to discontinue the ALEPH 0 mono block amplifiers?
The ALEPH 0 will remain in the line unchanged. This amplifier has received unprecedented
reviews and awards and has a world wide following. There are no plans to change or
discontinue this product.
Are there any plans to update the ALEPH 0 and 0s to the 2 gain stage design?
NO. These amplifiers will remain the same for the foreseeable future.
Are there any advantages to the 3 gain stage circuits?
YES. The 3 gain stage topology can deliver more power into difficult loads. These are
loads that dip substantially below four ohms over a large portion of the frequency range.
The 2 gain stage amplifiers actually will drive these loads but will not deliver
additional power into the load. The 3 gain stage circuits offer better bench measurements
and have a higher slew.
The 3 gain stage amplifiers have a much higher damping factor. Typically 1000 compared
to 100 for the 2 gain stage topology. This translates to possibly better control of the
woofer depending on the speaker design.
What advantages does the 2 gain stage design offer?
PURER. Fewer parts between input and output: Two resistors and two Mosfets. This design
has no adjustments. The amplifier never needs to be readjusted and always stays in optimum
adjustment. The output stage is pure single-ended.
This simplicity and purity translates into more information getting through and a more
natural sonic signature.
Will the 2 gain stage amplifiers drive low impedance difficult loads?
YES. The 2 gain stage amplifiers will drive difficult speaker loads, and are stable
into a direct short. The difference is that this design, being single ended class A, does
not allow the amplifier to deliver additional power into the speaker below 4 ohms. The
power that the amplifier delivers into a 4 ohm load is the maximum available output power.
Why does a pair of ALEPH 0 amps sell for more than a pair of ALEPH 2 amps ?
The ALEPH 0 amps utilize a more complex circuit and have a more expensive chassis. The
3 gain stage units take longer to build, having more parts and adjustments.
What is the difference between the ALEPH 1 and the ALEPH 1.2?
The ALEPH 1 and the ALEPH 1.2 share the exact same physical chassis. The ALEPH 1 is a 3
gain stage design and the ALEPH 1.2 is a 2 gain stage design.
The only physical difference between the models is that the ALEPH 1.2 has a laser
engraved top cover that indicates the model number.
Why was the ALEPH 1 changed to the 2 gain stage design?
The 2 gain stage amplifiers from Pass Labs have been so successful that dealers,
distributors, and customers have asked that the ALEPH 1 be changed to this circuit
Can existing ALEPH 1 owners have their amplifiers updated to the 1.2?
YES. An update program will be offered to owners of current ALEPH 1 amplifiers. Contact
the factory for details.
How does the current ALEPH P differ from the original ALEPH P?
Remote control function for the input selector and master volume control. Laser
engraving on the front panel for all controls including channel gain. Laser engraving on
the rear panel for inputs and outputs Blue LED indicators for each input selection. Blue
LEDs around the master volume control to indicate relative level. Redesigned main circuit
board. Larger toroidal power transformer. Additional circuit boards for front and rear
panels. New internal input attenuation switch for extremely high inputs. More range on the
master volume control, an extra 6db. More range on the channel level controls, 21 dB
total. Remote control case machined from sold block of aluminum. Color of the knobs has
been changed from black to instrument gray.
How does the ALEPH P with remote control differ from the current ALEPH P
offered without remote control?
They are exactly the same unit except that the ALEPH P without remote control does not
have the hand held remote control unit. The gain stage circuit topology and power supplies
are identical. The hand held remote control can be added at any time in the future.
In order to add the hand held remote control unit the Aleph P must be a current unit. A
current Aleph P can be indentified by the four blue LEDs above the selector switch and the
8 blue LEDs around the volume control knob.
How can I tell an original non-remote ALEPH P from the new non-remote ALEPH P?
The easiest way to tell the units apart is to see if the unit has 4 blue LEDs above the
selector switch to indicate which input is selected. The original unit did not have LEDs
above the selector switch. The new non-remote units also have blue LEDs around the master
volume control. The original units did not have LEDs around the volume control.
When should I consider using an 3 gain stage amplifier?
Better measurements, including distortion, slew rate, damping factor, and output
current. More power into low impedance loads Classic design
What are the shipping sizes and weights of the PASS products?
ALEPH 0 - in shipping carton - 21" x 21" x 19" - 60 POUNDS
ALEPH 0s - in shipping carton - 21" x 21" x 19" - 60 POUNDS
ALEPH 1.2 - in shipping carton - 23" x 23" x 18" - 120 POUNDS
ALEPH 2 - in shipping carton - 21" x 21" x 19" - 58 POUNDS
ALEPH 3 - in shipping carton - 16" x 16" x 14" - 36 POUNDS
ALEPH 5 - in shipping carton - 21" x 21" x 19" - 58 POUNDS
ALEPH P - in shipping carton - 24" x 17" x 10" - 35 POUNDS
ALEPH L - in shipping carton - 21" x 21" x 9" - 24 POUNDS