Ayre Acoustics Stereo Amplifier K 5x User Manual

Ayre K-5x  
Owner’s Manual  
A y r e  
K-5x  
Preamplifier  
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Table of  
Contents  
Welcome to  
Ayre . . . . . . . . . . . . . . . . . . . . . . . 2  
Installation . . . . . . . . . . . . . . . . . . . . 3  
Operation. . . . . . . . . . . . . . . . . . . . . 6  
Specifications . . . . . . . . . . . . . . . . . . 11  
Warranty . . . . . . . . . . . . . . . . . . . . 12  
Notes . . . . . . . . . . . . . . . . . . . . . . 15  
Connections and  
Controls and  
Numbers and  
Statement of  
A Place for  
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Welcome to  
Ayre  
Please send in your warranty  
registration card so we can  
stay in contact with you.  
Your Ayre K-5x offers a significant advance in the  
musical performance of high-fidelity equipment.  
The warmth and immediacy of a live performance  
are apparent from the first listening. The  
combination of superb resolution and a natural,  
relaxed quality will draw you into the music, time  
and time again.  
This level of performance has been implemented  
using the highest level of workmanship and  
materials. You can be assured that the Ayre K-5x  
will provide you a lifetime of musical enjoyment.  
2
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Connections and  
Installation  
The Ayre K-5x preamplifier is easy to hook up and  
use. The following guidelines will ensure that the  
installation goes smoothly.  
Location  
The infrared beam of the  
remote transmitter will also  
travel through glass.  
A good location for your preamplifier is in an  
open-backed cabinet or on a shelf. The receiver for  
the infrared remote control is mounted behind the  
display lens on the front panel. A direct line of sight  
from the listening position will ensure the  
maximum range. However, the beam will also  
reflect off of most wall surfaces with a reduced  
range.  
Inputs  
When you have a choice, a  
balanced connection will offer  
slightly higher sound quality  
than an unbalanced  
The Ayre K-5x offers two pairs of balanced inputs  
and two pairs of unbalanced inputs. Balanced  
connections are made via three-pin XLR connectors,  
while unbalanced connections are made via RCA  
connectors.  
connection.  
3
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The FET switches used in the input selector  
circuitry offer transparent, noise-free switching,  
with no moving parts. Please be aware that they can  
be overloaded if the output voltage from the source  
component is too high.  
Do not use a source component that has  
an output level greater than 4 V RMS  
unbalanced, or 8 V RMS balanced.  
Using a source component with too great an output  
level will cause distortion.  
The input connectors on the  
rear panel are labeled to  
match the input selector  
buttons.  
In this modern era of diverse source components, it  
has become impractical to pre-label the inputs with  
the actual name of the source. Instead, the K-5x has  
simple icons that allow you to easily remember the  
selector button associated with each source  
component.  
Tape Outputs  
By connecting the “Tape Out” jacks on the rear of  
the K-5x to a recorder with analog inputs,  
recordings may be made directly from the other  
source components connected to your preamplifier.  
The tape outputs are switched on and off at the front  
panel. Please refer to the section “Controls and  
Operation” for further information.  
If a recorder is not installed in  
your system, the “Moon” input  
performs exactly like the other  
unbalanced inputs.  
If you are connecting a recorder to your  
system, be sure to connect its outputs to  
the “Moon” input of the K-5x.  
4
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A y r e  
S.N.  
K-5 Stereo Preamplifier  
Boulder, Colorado USA  
Right Channel  
S2  
B1  
B2  
Left Channel  
S2  
B2  
B1  
Outputs  
Outputs  
Volts  
50/60 Hertz  
Tape  
Out  
Tape  
Out  
S1  
S1  
10  
W
Max  
This will prevent the undesired possibility of  
creating a feedback loop when making a recording.  
Main Outputs  
The balanced outputs use  
XLR connectors, while the  
unbalanced outputs use RCA  
connectors.  
The Ayre K-5x offers one pair of balanced outputs  
and one pair of unbalanced outputs. Both pairs of  
outputs may be used simultaneously. However,  
please note that the level of the unbalanced outputs  
will be 6 dB lower than the balanced outputs.  
AC Power  
The best sound quality is  
normally achieved when the  
K-5x is plugged directly into  
the wall outlet, without using  
any power strips or power line  
conditioners.  
Connect the Ayre K-5x to an unswitched power  
source. When the unit is first connected to the AC  
power, the input selector will default to “Star”, the  
volume control will default to “11”, the display will  
be set to “On”, and both the mute and record output  
will be set to “Off”. Removing the AC power from  
the unit will cause it to lose its current settings and  
revert to the default settings.  
5
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Controls and  
Operation  
At the heart of the Ayre K-5x’s control system is a  
sophisticated microprocessor. This microprocessor is  
normally “asleep” and all digital systems are turned  
off, including the master clock. When the  
microprocessor receives a command, either from the  
front panel or the remote control, it “wakes up” to  
execute the command, and then immediately returns  
to “sleep” mode. This system ensures noise-free  
reproduction of music signals.  
Volume Control  
The volume level is changed  
with the front panel knob.  
The remote control may also be  
used to change the volume.  
The Ayre K-5x’s exclusive volume control yields  
superlative sonic performance. Field-Effect  
Transistor (FET) switches combine with discrete  
metal-film resistors to create a volume control with  
crystal-clear transparency and no moving parts,  
along with digital accuracy and repeatability. The  
volume control comprises 66 individual levels, each  
with a step size of 1.0 dB allowing for precise  
selection of the desired volume setting.  
When the unit is first connected to an AC power  
source, the volume level defaults to “11”, a relatively  
6
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A y r e  
K-5x  
low setting. After that, the current volume setting is  
retained in memory, and will remain constant when  
changing inputs.  
Input Source Selection  
The source component may also  
be selected with the remote  
control.  
The input selector buttons are located below the  
display. Icons that match the connector labels on the  
rear panel (Star, Planet, Comet, Moon) are used to  
denote the inputs. When the unit is first connected  
to an AC power source, the “Star” input is selected  
by default.  
The input selector utilizes sophisticated FET  
switches. Both the signal and ground connections to  
each source component are switched, so that any  
un-selected components are completely disconnected  
from the system. This avoids any problems with  
undesired ground loops.  
7
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Mute  
Muting and un-muting may  
also be performed with the  
remote control.  
The mute button provides an easy way to  
temporarily turn the volume of the K-5x to “zero”.  
The current volume control setting is retained in  
memory and appears on the display.  
Tape Output  
The “Tape Output” function  
does not operate on the “Moon”  
input. This avoids the  
When the “Tape Output” button is pressed, the  
indicator will light up and the signal from the  
currently selected source component will be routed  
to the “Tape Out” connectors. This allows a  
recording to be made.  
undesired possibility of  
creating a feedback loop.  
Turn the “Tape Output” off, unless a recording is  
being made. This will completely disconnect the  
recorder from the K-5x (including the ground  
connection), avoiding the possibility of undesired  
ground loops.  
Display  
The display function is only  
available from the remote  
control.  
The display of the K-5x may be turned off via the  
remote control, if desired. A single blue light  
indicates that the display is turned off. When  
further commands are received, either from the  
front-panel buttons or the remote control, the  
display will be activated for a few seconds to confirm  
the command, and then turn off automatically.  
Pressing the “Display” button on the remote control  
again will turn the display on.  
8
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Processor Pass-Through  
When using the Ayre K-5x in a surround-sound  
system for home theater, it is desirable to use the  
“Processor Pass-Through” mode. This mode allows  
your two-channel music sources to be routed  
directly through the K-5x, avoiding the sonic  
degradation of most processors, and at the same time  
allows the front two channels of the theater system  
to integrate with the K-5x with the touch of a  
single button.  
If you are using a surround-sound processor, connect  
the front left and right outputs of the processor to  
one of the inputs on the K-5x. Please note that the  
K-5x can accept either balanced or unbalanced  
signals.  
A y r e  
K-5x  
To activate the “Processor Pass-Through” mode for  
that input, remove the AC power from the K-5x for  
at least 10 seconds. Then, while pressing the input  
selector button corresponding to the chosen  
surround-sound processor input, re-connect the AC  
power.  
9
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The chosen input is now programmed for “Processor  
Pass-Through” operation, disabling the now  
redundant volume control of the K-5x. When that  
input is selected, the preamplifier section of the  
K-5x is set to unity gain (0 dB), and the volume is  
controlled directly from the surround-sound  
processor. The volume indicator of the K-5x will  
display “PP” to show that the “Processor  
Pass-Through” mode has been selected for that  
input.  
To clear the “Processor Pass-Through” mode from  
an input and restore normal operation, remove the  
AC power from the K-5x for at least 10 seconds.  
Then, while pressing the “Mute” button, re-connect  
the AC power.  
Break-In  
100 to 500 hours of music  
played through the system will  
ensure full break-in.  
Due to the manufacturing processes used for the  
wires and capacitors, a break-in period is necessary  
for the amplifier to reach its full sonic potential.  
10  
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Numbers and  
Specifications  
Maximum Input Level  
Input Impedance  
4 V RMS – unbalanced inputs  
8 V RMS – balanced inputs  
20 k– unbalanced inputs  
40 k– balanced inputs (20 kper phase)  
XLR Input Polarity  
Pin 1 – Ground  
Pin 2 – Non-inverting (Positive)  
Pin 3 – Inverting (Negative)  
Maximum Gain  
4 dB – unbalanced outputs  
10 dB – balanced outputs  
Frequency Response  
Output Impedance  
DC – 200 kHz  
55 – unbalanced outputs  
110 – balanced outputs (55 per phase)  
Power Consumption  
Dimensions  
10 watts  
17-¼" W x 13-¾" D x 4-¾" H  
44 cm x 35 cm x 12 cm  
Weight  
25 pounds  
11.5 kg  
11  
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Statement of  
Warranty  
Please take a moment to fill  
out and return the enclosed  
warranty registration card.  
Your Ayre K-5x preamplifier is warranted against  
defects in workmanship and materials for a period of  
five years from the date of purchase. This warranty is  
transferable to subsequent purchasers within the  
original five-year period. All warranty claims must  
be made through an authorized Ayre dealer or  
distributor.  
Warranty Statement  
1. Ayre Acoustics, Inc. (Ayre) warrants the materials  
and workmanship of this product for a period of five  
years from date of first purchase. If any defects are  
found in the materials or workmanship of this Ayre  
product within the warranty period, the unit will be  
repaired or replaced by Ayre or its authorized agent.  
2. Purchaser must return the product, packed in the  
original shipping carton, freight prepaid to:  
Ayre Acoustics, Inc.  
2300-B Central Avenue  
Boulder, Colorado 80301  
12  
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or to Ayre’s authorized agent.  
3. Ayre reserves the right to inspect any product  
that is the subject of any warranty claim prior to  
repairing or replacing it. Final determination of  
warranty coverage lies solely with Ayre.  
Out-of-warranty claims will be billed for labor,  
materials, return freight, and insurance as required.  
Any product for which a warranty claim is accepted  
will be returned to the purchaser and the cost of  
shipping and insurance will be factory prepaid  
within the boundaries of the USA. Units to be  
shipped outside of the USA will be shipped freight  
collect only.  
4. Ayre strives to manufacture the finest possible  
equipment, and therefore reserves the right to make  
improvements on its products, without necessarily  
assuming an obligation to retrofit such changes  
upon its previously manufactured models.  
5. The above warranty is the sole warranty given by  
Ayre, and is in lieu of all other warranties. All  
implied warranties, including warranties of  
merchantability or fitness for any particular purpose  
shall be strictly limited in duration to five years  
from the date of original purchase, and upon  
expiration of the warranty period (five years), Ayre  
shall have no further obligation of any kind, whether  
express or implied. Further, Ayre shall in no event  
be obligated for any incidental or consequential  
damages as a result of any defect or any warranty  
claim, whether express or implied.  
13  
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6. Ayre does not authorize any third party,  
including any dealer or sales representative to  
assume any liability of Ayre or make any warranty  
for Ayre. The unit must not have been altered or  
improperly serviced. The serial number on the unit  
must not have been altered or removed.  
7. Warranty registration cards must be completed  
and mailed to Ayre within 30 days of purchase. Ayre  
may, at its option, require from the purchaser valid  
proof of purchase (dated copy or photocopy of  
dealer's original invoice).  
14  
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A Place for  
Notes  
15  
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16  
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Ayre Acoustics, Inc.  
2300-B Central Avenue  
Boulder, Colorado 80301  
+1-303-442-7300  
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