tube preamp or a headphone amplifier that's dead quiet and can drive
anything you throw at it with musicality and grace, then this is
probably it. It
replacement for our
popular CSP preamp. Besting the sound, performance and looks of
both, this one really pegs the value meter! Read the
designer's notes for the full story.
Single Ended Triode
Class A1 operation with a tube rectified high current power supply that
is five times bigger than required. The liquidity of this design
proves the best form of artifact free regulation is brute raw current -
you can hear it.
There is a single volume
control located at the front of the CSP2+. The line level output
was designed with a low output impedance and an adjustable output level
for each channel. The output level can be adjusted between 0 ~ 36
volts! That means it really WILL drive anything. If your
amplifier needs gain to develop a proper sense of dynamics, it's here
in spades. However, if your amp has a low input sensitivity (like
most main stream amplifiers today) you don't need gain so you simply
output level to 2 volts or less. This will let YOU set the usable
volume range for any amplifier. No more amps getting screaming
loud with the volume barely cracked on.
Inputs, there are
two. Both tied directly through a silver toggle switch located by
the jacks for the cleanest signal path possible. Of course there
ARE NO CIRCUIT BOARDS in the CSP2+. Everything is point to point
hand built with silver wire and absolute top grade non-Chinese parts.
Outputs are stereo with
a single mono output jack for
running sub-woofers or center speakers in a 3 speaker stereo array.
The CSP2+ is
inputs and outputs and can not be wired for balanced XLR jacks, sorry.
Headphone output is also
very healthy being enough to drive 95% of audiophile headphones way
louder than you could stand to listen to them. Volume for the
headphones is the same volume control in the front that controls the
line level. Plugging in the headphones does not mute the
line level outputs. Instead the volume ratio between what comes
out of your speakers and what you hear in the headphones is approx 10
to 1. It makes your speakers a low level background monitor for
when you take the headphones off and are selecting new music. Off
course you can simply turn your amplifier off if you don't want this
As of July 2010 the
CSP2 became the CSP2+ with the addition of two additional input level
controls making it possible to perfectly dial in the dynamics and gain
for any pair of headphones. No more "gets too loud too fast" on
high impedance phones, instead you adjust the input levels against the
master volume control to achieve a perfect balance exactly where you
want it. This has proved to be a revelation even for lower
impedance phones of 250 ohms or less, basically all phones. You
simply turn the master volume up to a level that is just past your
desired listening level, and then dial back the trim controls until the
perfect volume is reached. You'll hear how this can relax and
open up a set of phones that otherwise came off a little too aggressive
The CSP2+ comes with the
very highest grade 6N1P's which tend to be the warmest sounding and are
long life tubes. You can however use 6922's or 6DJ8's as direct
plug-in replacements if you enjoy a little tube rolling. The
usually ships with the a 5U4 rectifier tube, but you can also use 5Y3GT
or 5AR4. The amp is self-biasing so no adjustments are needed for
the life of the unit.
The CSP2+ comes standard
with your choice of black figured wood base shown in the picture at the
top of this page
or you can have a contemporary style base in natural walnut shown
Custom bases can also be
made in the style shown below from any
hardwood including many exotics for an extra charge. Custom bases
are non-refundable. The wood bases for the CSP2+ are user
interchangeable. That means you can purchase a custom base at any
time for your CSP2+ and change it yourself !
Shown in optional contemporary base (walnut)
The CSP2 can be configured with the following options:
You can check the options you
want and check the shipping cost by adding it to the shopping cart.
- Choose between the black figured base
or the contemporary walnut
- Choose other hardwoods
- Stepped attenuator
- 2 pair of stereo output jacks with
relocated headphone jack.
amplifier is so transparent that
differences between cables will now become big differences. If you
don't have good interconnects or speaker cables or just not sure how
good yours are... we offer reference quality cables that will let you
hear its full potential. It is important to us that
you hear what your new amp is capable of and most customers, even
those with expensive cables, find that ours sound better.
amplifier is hand built in the USA by
DECWARE / High Fidelity Engineering C0. It comes with a lifetime
warranty to the original owner. If you purchase one second hand and
ever have questions or technical problems we WILL be happy to check it
out for you and service it if needed for a very reasonable rate.
have a support forum
many people who own this amplifier who's experiences you may benefit
products going back 10 years.
Manufactured from 2002 to 2006
The original CSP featured a simple steel
chassis and internal output level controls. It was a line level
CSP2 / Manufactured from
2006 to 2010.
The second model featured an upgraded chassis, and a completely new
circuit featuring an OTL headphone output. Line level adjustments
became external and increased in max output by five times.
This latest version has an added set of variable input trim controls
used to fine tune the output level from your source. Very useful
for serious headphone users as it allows you to get the volume range
dialed in where you want it. To accomplish this, a complete
redesign of the internal layout was implemented making this CSP2+ even
more transparent than before.
This amplifier requires no adjustments or maintenance other
than changing tubes every couple years.
H x 7.250" W x 14.75" D
than 0.5 millivolts
~ 70 kHz
negative feedback used
or 6922 or 6Dj8
resistors are audiophile grade
filter caps are premium quality
watts at full power
type 24K Gold / Teflon
type 24K Gold / Teflon
inch stereo jack
This amplifier comes standard with our World Voltage Compatible
Transformer. Your CSP2+ will be automatically wired for the correct
voltage for your country and be supplied with the correct removable
owner manual for this amplifier can be viewed on line or printed: Owners manual.pdf