Price: $4,500

The preamplifier is the control center of your system. This preamplifier is designed to provide the finest and most transparent acoustic performance available while increasing the value to our customers. Specifically, the new Sanders Preamplifier combines the performance and features of our previous Line Stage and Phono preamps into one.

 

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Our previous preamps (line stage and phono) were $4,000 each, for a total cost of $8,000 for our customers who needed a phono preamp.  Since both preamps are now combined, customers who need a full-function preamp can now save several thousand dollars as the new preamp sells for half the price of the previous two.

Additionally, more modern circuit design technology has reduced distortion and noise figures from those in the earlier preamps.  The styling has been redesigned to better match our amplifiers.  A video processor pass through also is included in the new preamp.  All the previous ergonomic and performance features of the earlier preamps have been retained.

The goal of a true audiophile grade preamplifier is to offer gain, switching, and other conveniences, while at the same time passing the original signal downstream without adding distortion, noise, or a sonic signature of its own.  The Sanders Preamp does exactly that but includes many ergonomic features for convenience and ease of use that are not available on even far more expensive preamps.

The levels of each individual input can be adjusted to get them all matched so that you don't get "blasted" or have to turn up the main level each time you switch sources.  A stereo/mono switch remains standard equipment.  The overall gain, individual gain between devices, and channel balance can be adjusted in precise, 1 dB increments.  Muting by remote control is standard.  A video readout makes it easy to monitor the levels.

Controls are available both by remote control and on the front panel.  Front panel controls are done through micro-touch electronic switches.  Internal switching is done by miniature, sealed, gold relays.  Conventional rotary volume controls have channel matching error of around 20%, which causes the left/right balance to shift as you change the level.  To solve this problem, some preamp manufacturers use discrete, precision resistors on a multi-step switch.

 

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While this solves the channel tracking problem, they introduce new ones.  Specifically, they have very limited resolution due to too few steps (typically 31 steps of 2 dB each).  These "stepped attenuators" produce very annoying switching transients at each step.

The Sanders Preamp solves these problems by using the "volume control" knob to drive an optical comparitor circuit.  The optical circuit operates a microprocessor that controls an electronic gain system.  This controls the level using one hundred, one dB steps, with precision of greater than 0.1% between channels.

The microprocessor monitors the signal voltage and waits for it to cross the zero voltage point between waves before switching to the next level.  This prevents any switching transients.
The volume control knob has detents at each 1 dB point and it rotates continually.  So it as an infinite number of detents and you can feel each 1 dB change in level.

There is a digital display with beautiful, blue, light emitting diodes (LEDs).  The display continually shows the output level of the unit and switches automatically to show level differences between channels, when you adjust the balance, or when you adjust the input levels.  You no longer have to guess at the levels or try to see fine gradations on a knob to know the levels, since you can see them from several feet away.

Most components come with a remote control transmitter that only controls that particular component.  Therefore you end up adding that remote transmitter to the pile of remotes you have for all your other electronics.

Rather than contribute to "remote clutter", the Sanders Preamp comes with a programmable remote that can be used to operate all your components.  You will then no longer have to dig through a pile of remotes every time you want to adjust something in your audio/video system.

The phono preamp offers exceptional flexibility and features, including virtually all the features of the most expensive, dedicated phono preamps.  These include switchable gain for both moving magnet and moving coil cartridges, and user-adjustable cartridge loading for both resistance and capacitance so that users can match their cartridge manufacturer's specifications for optimum performance.  The phono circuit has the benefit of extremely low distortion and an ultra-quiet noise floor.

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Sanders Sound Systems Preamplifier Back

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 SPECIFICATIONS OF PREAMPLIFIER 

Electrical Specifications

INPUTS

  • Five unbalanced inputs at line level using RCA connectors.
  • One balanced input using XLR connectors.
  • One unbalanced, RCA phono input with switchable gain, adjustable input loading, and RIAA equalization.
  • One unbalanced video processor input with fixed level at unity gain for "pass-through" use.

OUTPUT

  •  Two pair of adjustable, unbalanced, outputs at line level using RCA connectors
  • One pair of adjustable, balanced, outputs using XLR connectors (Pin 2 "hot")
  • One unbalanced, fixed level output at unity gain for recording using RCA connectors
  • All outputs may be used simultaneously

 Frequency Response

-3 dB at 5 Hz and 200 kHz

Noise

Greater than 100 dB below 1 volt reference

Distortion

Less than 0.002% from 10 Hz to 40 KHz @ 5 volts peak into  600 ohms or higher, shunted by 1,000 pF or less

Output Impedance

50 ohms, non-reactive, balanced or single-ended

Phono Input Impedance  

User adjustable between 47,000 and 100 ohms.  Default  setting is 47,000 ohms

Phono Input Capacitance  

User adjustable between 50 pf and 1,200 pF.  Default setting is 50 pF.

Input Impedance

47 kohms, balanced or single-ended 

Gain  

User adjustable up to 18 dB.  Default setting is +8 dB

 Maximum Output   

 10 volts peak

Crosstalk

Greater than 70 dB from 20 Hz to 20 KHz 

Power Supply

Independently regulated with shielded toroidal transformer and 20,000 uF of capacitance

Power Consumption

10 watts

Voltage

Voltage is user selectable for use world-wide

 

 

Weight and Dimensions

Weight

Net Weight:  8 pounds (3.6 KG)
Shipping Weight:  13 pounds  (5.9 KG)

 

Dimensions

17" wide x 2.5" tall x 10.5" deep (43cm x 6.35cm x 27cm)

 

Speakers and Electronics are manufactured in Conifer, Colorado.

We sell Direct World-Wide  (along with select dealers) - Prices apply World-Wide - 30 Day In-Home Risk Free Trial 

We are so confident in the design and build quality of our products, that we offer a

Sanders Sound Systems Lifetime Warranty

All Rights Reserved 2015 Sanders Sound Systems