Page 1
THE
STRADIVARI SERIES OF SPEAKERS
OWNER'S MANUAL
Page 2
TABLE OF CONTENTS
Introduction
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Product Concept and Description
Concept
Construction
Finish
Music
Grandmaster
Master
Premiere
Legend
Unpacking
Connection
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1
2-5
2
2
3
3
3 -4
4
5
5
6
7
Selection of Speaker Cables
Maintenance
Warranty
Specifications
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8
9
10
11
Page 3
STRADIVARI SPEAKERS
INTRODUCTION
Congratulations on choosing Stradivari Speakers. Your speakers have been hand-
crafted from the finest parts and materials. The Stradivari Speakers utilize proprietary
Cello circuitry and are designed to perform for decades of musical enjoyment.
Until now, music lovers had to choose between speakers with a high degree of
transparency and speakers with punch and dynamic range. Some products,
attempting to do both, have achieved neither goal. The Stradivari Series from Cello
combines transparency with punch and dynamic range, as well as superb imaging,
elegant styling and exceptional reliability.
Please read this manual carefully. If you have any questions, contact your Authorized
Cello Supplier, or call Customer Service at the factory. It is our wish to assist you in
every way, now and in the future.
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STRADIVARI SPEAKERS
PRODUCT CONCEPT&DESCRIPTION
Concept Because of Cello's work with major record companies and
mastering laboratories, we know that stability (no performance
drift), reliability (no down time), and flexibility (ability to play
all kinds of music) are essential qualities for professional
monitor speakers. Yet, speakers having these attributes
generally lack natural tonal qualities. Studio engineers have
been forced to live with such speakers because they cannot
accept the power handling limitations and other problems of
more sonically refined speakers. At the same time, in order to
enjoy more natural tonal qualities, music lovers at home have
been forced to accept limitations in stability, power handling,
dynamic range and reliability. The Strad series is a solution for
both studio professionals and home listeners who want it all.
2
Construction
All Strad models are designed and built with the same high
level of quality, construction and component parameters. With
design considerations for cabinet size and driver array, the
hand-finished drivers, crossover boards, wiring and other
materials used in all Strad products are of the same high level of
quality, construction and component requirements and
parameters. The difference between them is the height of the
cabinet and the number of drivers and crossover boards. A
comparison can be made to string instruments and pianos,
which are made with the same quality but are available in
various sizes for different requirements.
Strad models feature a vertical in-line array of mid and high
frequency drivers on a relatively narrow front panel. On each
floor standing model cabinet this front panel is angled in at 15
degrees toward the listening position, so the sides of the speaker
stay parallel to side and rear walls, while the face is positioned
at the correct angle for optimum performance.
Heavy duty brass bolts are provided for tri-wired speaker
connections. Special harnesses of Cello Strings 3 Litz speaker
cable are recommended for termination to the power
amplifier(s).
Page 5
3
PRODUCT CONCEPT&DESCRIPTION (cont.)
STRADIVARI SPEAKERS
Finish
Music
Strads are available in either black piano or rosewood finish on
standard order. Other custom finishes may be available on
request. Black, acoustically-transparent grills are provided.
Strads are designed to complement the finest interior
appointments and are, themselves, handmade works of art.
First, play a recording of a delicate instrument such as a
harpsichord. Hear how the Strad reproduces the natural tone,
subtleties, complex harmonics, exact attacks, and room
ambience rather than impressing you as a large speaker. The
clarity is there together with the body of the instrument. There
is a presence between the speakers, as there would be in life if
the artists were there.
Second, play a recording of human voice or voices. It sounds
like human beings making music. Again, the Strad resists the
need to impress you with its size and allows the music to
provide the impression.
Third, listen to the most dynamic recording of a symphony
orchestra playing the Firebird, or a jazz band such as Count
Basie.
Strad Grand Master
In concert with Cello electronics and cables, the Strads spring to
life, reproducing from triple pianissimo to triple fortissimo with
complete ease. If you know the recording, you may find it hard
to believe it is the same one because it now sounds so full,
uncompressed, and real.
Now you realize that with all kinds of musical recordings the
Strads give you what the musicians intended: the full tone,
ti
mbre, size and depth of the music. This enables the musical
message to come through intact.
Like the concert grand, the Grand Master is the largest Strad
model. Elegant in dimension, each Grand Master is a towering
cabinet with eight tweeters, eight midranges, and two 12"
woofers. These drivers enable the Grand Master to move a great
quantity of air very quickly, achieving not only very low
distortion but a staggering 127dB SPL peak capability.
Page 6
PRODUCT CONCEPT&DESCRIPTION (cont.)
Since no single driver is required to overwork, a completely
effortless reproduction is evident on even the most demanding
musical passages. Two separate crossover boards are installed
with access at the rear of the speaker. Each crossover provides
signals to half the drivers (four mid, four high, and one low
frequency driver.). In this way, each board handles half the
power being utilized, thus providing superior performance.
Exclusive Cello design techniques, including tri-wired, dual
crossovers with paralleled drivers and Litz wire, enable the low
i
mpedance characteristics of the Grand Master to be driven with
optimum results and very little loss of energy.
The Grand Master can be placed in even medium-sized rooms
(12x15') (3.65 x 4.60m) provided the ceiling height is adequate.
However, the forte of the Grand Master is filling large rooms
with clean, clear, natural sound without clipping, distortion, or
compression. It has an efficiency of 96 dB (1m
the "footprint" of the Grand Master is quite small so that little
room area is taken. They also project sound over furniture,
pianos, and other objects that might be in a room.
4
STRADIVARI SPEAKERS
@2.83 V). Yet
Strad Master
The Grand Master is designed to be driven by the Performance
Amplifier, in single or bridged configuration. Installation
requires four strong adults. The Grand Master can be placed on
bare floor or on carpet, using spikes or large bases for added
stability.
Because it is so revealing, the Grand Master is enhanced by
use with the Audio Palette or Palette Preamplifier to allow
compensation for tonal balance problems in the recordings
(see literature for AP, PP).
The Strad Master is essentially the same as the Grand Master,
utilizing four high and mid range drivers instead of eight, and
one crossover board. It is an ideal choice when ceiling height,
room size, or budget does not allow the choice of the Grand
Master. The Master can be driven by any Cello amplifier. Its
efficiency level is 90 dB. The Performance Amplifier or Duet
350 will enable the Master to achieve sound pressure levels of
115dB, and in bridged mode, over 120 dB. The Encore
Amplifier will provide extremely enjoyable results in many
applications as well. The height of the Master is perfect for the
normal living room.
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5
PRODUCT CONCEPT&DESCRIPTION (cont.)
Strad Premiere
The Strad Premiere
woofer, one midrange and one tweeter. This gives the Premiere
less vertical height (45") (115cm) and makes it the most
physically discreet of the floor standing Strad models. The
Premiere is built with the same level of drivers, crossover
boards, cabinet construction, wiring and quality control as its
big brothers. Therefore, the Premiere offers full Cello
performance, appearance and reliability. The Premiere can be
driven by any Cello amplifier with excellent results and, while
extremely transparent and revealing, can produce up to 115dB
SPL. Its efficiency is 90 dB. The impedance measures
nominally 4 Ohms. Use with the Audio Palette or Palette
Preamplifier will enable the listener to compensate for tonal
balance problems in the recordings themselves, allowing the
full capabilities of the Strad Premiere and associated equipment
to be enjoyed.
is a three way design, including one 12"
STRADIVARI
SPEAKERS
Strad Legend The Strad Legend is the smallest of the Strad Line of speakers.
The Legend is a three way design with one 1" dome tweeter, 3"
dome midrange and 12" woofer. Designed as a large bookshelf
speaker it can be used on a stand, shelf or as a floor standing
speaker. Its acoustic suspension design and specially
constructed crossovers provide dynamics and SPLs normally
expected in speakers of significantly larger size. The Legend
can be driven by any Cello amplifier with remarkable results
and creates a compact Cello system when combined with the
Cello Encore Amp and Encore Preamp or Palette Preamp.
Page 8
STRADIVARI SPEAKERS
UNPACKING
The packing crates for the Stradivari Speakers should arrive in good condition. Please
look for damage to the crate, although this is most unlikely due to crate construction.
Save packing and crates for reuse in the event the units must be shipped in the future.
Warning:
The Strad Speakers are very heavy. Two - three people should be used to move a
Premiere and three - four people should be used to move a Master or Grand Master.
6
Page 9
7
STRADIVARI SPEAKERS
CONNECTION
All the Stradivari Speakers have tri-wire capability. This means the high, midrange
and low frequency cross-overs have separate inputs. The cross-over inputs are located
at the rear of each speaker and are accessed through a total of six 1/4-20 threaded
terminals with nuts for each cross-over. These terminals are arranged in three pairs.
The top pair is the high frequency section. The middle pair is the midrange section.
The bottom pair is the low frequency section. While facing the rear of the speaker the
three positive input terminals are on your right and are designated by a red dot. The
three negative input terminals are on your left and are designated by a black dot.
The Grand Masters have two cross-over boards and therefore two sets of terminals.
Connect your positive left channel speaker leads to the positive terminals of your left
speaker and your negative left channel speaker leads to your negative terminals of
your left speaker. Repeat this for the right channel.
Caution:
additional quarter turn.
Do not over tighten nuts. Tighten so they are snug then tighten an
Page 10
STRADIVARI SPEAKERS
8
SELECTION OF
Any high quality speaker cables may be used. For optimal operation we recommend
Cello String #3 or Cello String #2 for connection to amplifiers. Cello Strings #3
constructed into triwire harnesses are recommended for Masters and Grand Masters.
CELLO STRING #2 is a high quality speaker cable comprised of a large number of
very fine conductors in a red or black jacket. Triwire harnesses consisting of three
red and three black wires in an expando jacket are available for use with Stradivari
speakers.
CELLO STRING #3 is a heavy Litz construction speaker cable for the ultimate in
power amplifier signal transmission. It is composed of two large Litz wire conductors
separated by a .2 inch web.
SPEAKER CABLES
Page 11
9
STRADIVARI SPEAKERS
MAINTENANCE
The finish of the Stradavari Speakers is a clear laquer over wood or over piano black
polyester paint.
Ammonia based glass cleaner and a soft cloth work well to preserve shine and
remove finger prints.
CAUTION: Make sure not to use any cleaners or polishes with abrasives as these
may damage the finish.
When cleaning, wipe in a circular motion and do not rub too forcefully.
Page 12
STRADIVARI SPEAKERS
10
CELLO LIMITED
Parts:
parts for five years and electronic parts
for life.
Labor:
the distributor except for the following:
Any defective product during the first
year shall be repaired by the distributor
with labor paid by Cello according to
factory rates for a given repair. At
Cello's discretion, or if the distributor is
unable to perform the repair, the unit
may be returned to the factory for
service using agreed-upon air freight.
After repair, the unit will be returned by
the same carrier or equivalent. During
years 2-5, if the distributor is unable to
perform the repair Cello will pay return
air freight from the factory by agreed
upon carrier provided the unit was
shipped to the factory with air freight
prepaid.
Cello will not pay freight if units are
returned without a Return Authorization
number (RA#). Cello will not pay
freight if units are found to be in perfect
working order.
Warranty of Repair Work
Performed:
modifications effected by the factory or
authorized service facility shall be
guaranteed for 100% parts and labor for
the remainder of the warranty period for
the unit or one year (whichever is
longer), except for electronic parts
which carry a lifetime warranty.
Cello warranties all mechanical
Labor is the responsibility of
Any specific repairs or
WARRANTY
Cello, Limited. Warranty cards inside the box
shall be completed by the retailer and
customer respectively and returned to Cello,
Limited within 30 days from the date of the
sale to the customer.
All products must be registered. When sold,
new owners must be registered for the
transfer of the warranty to be effected. All
warranties are transferable to any succession
of subsequent registered owners. Please
contact you nearest authorized Cello supplier
or the Customer Service Department at the
factory for details of subsequent owner
warranty registration.
Tampering/Abuse/Misuse:
unauthorized modifications, repairs or
tampering, and/or any indications of obvious
owner abuse, negligence or improper usage,
as determined by Cello, Limited shall be
grounds to void the warranty.
Service:
is not functioning properly, please call the
Customer Service department at the factory.
If you need to return your component, you
will be given an R/A (return authorization)
number. This number must appear on the
outside of the shipping boxes. Returns
without R/A numbers will not be accepted.
Returns received in original Cello packaging
will be returned in original packing. Returns
received in non-Cello packing will be
returned in new Cello packaging at the
owner's expense. If you need replacement
packing materials, please contact the
Customer Service Department at the factory.
If you believe your Cello equipment
Any
Product Registration
Transferability:
out the form on the outside of the carton
when the goods are delivered to the
retailer. The form should be sent to
&
Distributors shall fill
Page 13
11
SPECIFICATIONS
HEIGHT
WIDTH
DEPTH
WEIGHT/EA
TWEETERS
GRAND MASTER
86.5" 61.5"
220
cm
17"
44
cm
18" 18" 18"
46
cm
500
226
kg
3/4" (8)
MASTER
157
cm
17"
44
cm
46
cm
370
kg
169
3/4" (4)
STRADIVARI
PREMIERE
45"
115
cm
17"
44
cm
46
cm
260
119
kg
1" (1) 1" (1)
SPEAKERS
LEGEND
26 1/4"
67
cm
14"
36
cm
12"
31
cm
80
37
kg
MID RANGES
WOOFERS
DESIGN
2" (8)
12" (2) 12" (2) 12" (1) 12" (1)
Accoustic
Suspension Suspension Suspension
MINIMUM
DRIVING POWER 200
IMPEDENCE
NOMINAL
MINIMAL
CROSSOVER
FREQUENCIES
SPL
EFFICIENCY
2
1
500
5000
127
96
w/ch
ohms
ohm
Hz
Hz
dB
dB
2" (4) 3" (1) 3" (1)
Accoustic
w/ch
200
3
ohms
2
ohms
500
Hz
5000
Hz
115
dB
90
dB
Vario Vent
w/ch
50
6
ohms
4
ohms
500
Hz
7000
Hz
115 dB
90
dB
Accoustic
50
6 ohms
4
500
5000
w/ch
ohms
Hz
Hz
Page 14
Cello, Ltd.
315 Peck St., Bldg. 23
New Haven, CT 06513
203 867-4008 Fax 203 867-4014
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