INTRODUCTION
C
ongratulations on your purchase of this precision audio component.
The Sonamp® 260 MKII has some significant improvements over its
predecessor the Sonamp® 260. Improved circuitry provides
increased robustness and reliability. The protection relay stays
disengaged for 1 second when a fault is detected to prevent the relay
contacts from overheating. There is improved THD and IM
distortion due to new circuit board layout. The input PCB has a high
pass filter which rolls off at 32Hz to protect autoformer based VCs.
The filter is defeatable by two jumpers on the input PCB. Auto-On
detect circuitry has improved sensitivity and a sensitivity cut jumper
located on the Input PCB. Improvements have been made to the
power supply to feature a 25A bridge rectifier and a double side low
voltage supply. All these improvements have allowed us provide a 5
year warranty. Special features include auto turn-on and looping
jacks to make it ideal for multi-room and multi-zone installations. Its
high power output is matched by enormous current capacity to drive
multiple pairs of high quality speakers. A robust toroid transformer
assures power in reserve. A discrete AB output stage assures flawless
reproduction. The Sonamp 260 MKII is the standard in the industry
with its reliable and efficient performance.
UNPACKING
Save your carton and the styrofoam inserts for future safe transport in
case you move or the unit ever requires shipping for repair. Note, it is
best if you place it into an additional outer "overcarton" before
shipment to minimize a chance of theft in shipment.
Before you proceed, find the serial number which is located on the
rear panel of the unit and note it here for future reference.
Serial # ________________________________________
PLACEMENT OF YOUR SONAMP
®
260 MKII
Keep your Sonamp 260 MKII out of direct sunlight and away from
windows that could ever be left open to let in rain.It should be placed away
from heat sources such as hot air ducts or radiators; do not place the unit
directly on pile carpet that could interfere with airflow into its bottom vent
openings. If you place your Sonamp on the floor near your speakers,
elevate it up from the pile carpet.If you stack your components, it is better
to place the Sonamp 260 MKII above or alongside your other components;
when driven hard, the unit itself creates significant heat and can affect
components stacked on top of it. If it is inside a cabinet allow ample
ventilation and at least 3" clearance on top and both sides. In a rack
installation, use a 1U vent below your Sonamp and a 2U vent above.Very
sensitive low level sources might pick up some hum radiated from its
power supply.
GROUND LIFT
The Sonamp 260 MKII features a Ground Lift switch to break
the hum loop set up by the chassis making contact in a rack system. This
eliminates the need to insulate rack mount faceplates with nylon washers.
MAKING CONNECTIONS
Before making any signal or speaker connections, make sure your
power amplifier is turned off and unplugged.When making
connections,make sure there is no strain or tension on input leads or
speaker wires that could cause them to pull loose later on.
Input Connections
Use the RCA jacks for the R and L channels. Make sure these are
consistent with the R and L outputs from your preamplifier.
Looping Jacks
Your Sonamp 260 MKII provides a pair of RCA output jacks, which
duplicate the input signal. These facilitate connection of additional power
amplifiers from a single source component.With these un-buffered output
jacks,you can link or “loop”amplifiers without messy Y-cord adapters.
Speaker Connections
Use bare wire without spade lugs or plugs, make sure you strip only
enough wire (3/8"-1/2") to fit into the hole that runs across the
metal shaft of the terminal.
Polarity
It is important to observe correct polarity when using in stereo
mode. One side of the speaker lead will have some sort of mark,
either printing, a raised ridge on the insulation or different color of
conductor. This permits you to know which wire you had connected
to the + and which to the - speaker terminals so you can do exactly
the same at the power amplifier terminals.
Speaker Hookup
The Sonamp 260 MKII is capable of handling a 4 Ω load without strain or
distortion. If any of your speakers have a rated impedance of less than
8Ω, be sure that the total speaker impedance is not less than 4Ω per
channel. If you are in doubt,consult your Sonance retailer,custom installer,
or Sonance Technical Service.
Use Good Wire
For best results you should never use thin gauge speaker wire – it will
constrict the sound and deteriorate bass response. We recommend
use of premium Sonance MediaLinQ® speaker cable, which also
complies with UL fire rating. You may also wish to experiment with
audiophile-grade speaker cable and interconnects, but be sure to
check local codes governing wire that may be installed within walls
or ceilings. Each brand of wire will have a different characteristic
sound and some may be more compatible with the sonic “signature”
of your various components. Your Sonamp 260 MKII is stable with
any reputable brand of wire and speaker cable.
SONAMP 260 MKII
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