Rogers Classic LS3/5a 15 Ohm User manual

Rogers
British Hi Fidelity
Owners Manual
Classic LS3/5a 15 Ohm

Table of contents
Introduction.
Rogers. over seventy years of excellence
Unpacking.
Installation.
Caring for your loudspeakers.
Technical specifications.
Warranty.

Introduction.
Thank you for choosing to purchase Rogers Classic
LS3/5a 15 Ohm loudspeakers. We are confident that these
loudspeakers will provide you with high quality music
reproduction for many years to come.
Please take some time to read the manual to ensure that
your speakers perform at their best.
Rogers over seventy years of excellence.
For over seventy years the name of Rogers has earned
the high regard of music lovers worldwide with the high
standard of musical integrity it’s products have
consistently achieved.
Founded in 1947 in North London, by Jim Rogers, a
highly successful range of thermionic vale equipment
was produced, including several exquisitely built
amplifiers.
Later in the 1960’s and early seventies, Rogers was one
of the first British companies to lead the way with
good sounding transistor amplifiers and tuners.
During this period many loudspeaker designs from a new
factory in Catford, London, culminating in 1970 with
the introduction of the LS3/6 studio monitor. This was
the first BBC licensed design and heralded a

significant advance in moving coil loudspeaker
performance.
This was followed four years later by another BBC
licensed design, the legendary LS3/5a. Undoubtedly one
of the all-time greats in loudspeaker design it has
inspired more interest and critical acclaim than almost
any other product. Now entering its forty fourth year
of production it continues to astonish and impress
listeners the world over with its fine musical
performance.
Unpacking.
Always unpack speakers with care so as not to damage
the finish. It is advisable to open the packaging at
one end, invert the carton with the flaps folded back
so the speakers are sitting on the floor. Then remove
the packaging from the speakers. Retain all the
packaging materials in case you need to transport the
speakers at a later date.
Installation.
Position your speakers approximately where you want
them and select cable runs of an appropriate length and
terminations. Designed specifically for outside
broadcasting, the Classic LS3/5a can be positioned
close to a boundary wall, however do not position
tightly into the corners of a room. Alternatively

placing on high mass loaded stand in free space can
offer an increase in perceived space and depth of
playback material.
Note: the connections on the back of the speaker are
single wire with 4mm banana sockets. The correct
frequency response ( tonal balance ) is achieved with
the grilles in place. Removal of the grilles will
compromise high frequency and mid frequency
performance.
Switch off the amplifier. Identify the left speaker of
the pair as the speaker on the left when viewed from
the listening position.
Connect the black terminal on the amplifier left
channel to the black terminal on the left loudspeaker.
Then connect the red terminal on the amplifier left to
the red terminal on the left loudspeaker. Repeat these
connections for the right-hand channel. Check the
integrity of the connections and that there are no
shorted wires. Turn down the volume and switch on the
amplifier. Select a known source and turn up the volume
cautiously.
New speakers require a “break in” period. This enables
the drive units to settle into their normal working
routine and electrical components in the crossover to
“bed in”. A minimum of fifty hours playing will see the
speakers “broken in” additional playing will continue
to improve the overall sound quality.
Connecting cables can have an important effect on the
final sound quality. Similar lengths of good quality
speaker cable should be used. Your dealer can best
advise you of suitable cables for your installation.

Longer cable runs will generally require heavier gauge
cables.
All system connections should be clean and tight.
Periodically cleaning of all signal path connections in
your system is recommended. Simply breaking and re-
making each connection ensuring a positive contact is
all that is needed.
Caring for your loudspeakers.
The real wood veneer used on the Classic LS3/5a can be
maintained by regular dusting and gentle cleaning with
furniture polish and a micro fiber cloth. The grille
cloth is best kept clean with a soft brush or light
vacuum. Do not use undue pressure as you may damage the
drive units beneath the grille. Try not to position
your speakers in direct sunlight as over time this will
cause the veneer to fade.

Technical Specifications.
Classic LS3/5a 15 Ohm Monitor Speaker
System Type: Two way infinite baffle ( closed box)
Frequency Response: 70Hz –20KHz +/- 3dB
Bass/Midrange Driver: 138mm polymer cone
Tweeter: 19mm mylar dome
Crossover Frequency: 3KHz
Sensitivity: 83dB for 2.83V at 1M
Nominal Impedance: 15 Ohms
Recommended Amplifier Range: 30-80 Watts
( Warning do not connect to any amplifier exceeding
range as damage may result )
Cabinet: Cabinet 12mm Birch ply critically damped
Grille: Black Tygan

Finish: Selected real wood veneers
Recommended placement: On rigid mass loaded stands.
200mm from rear wall, clear of side walls, angled in so
axis cross just in front of the listener.
Dimensions: 188 x 304 x 164 ( W x H x D )
Weight: 5.12Kg each speaker.

Warranty.
Rogers UK warrants this product to be free from defects in materials
and workmanship for two years from the original date of purchase from
an appointed Rogers UK dealer, and agrees to covers the cost of parts
and associated labour required to correct such defects, subject to
terms & conditions.
This Warranty is offered to the first purchaser only. If the product
fails in normal domestic use and during the Warranty period due to the
above described faults or defects, Rogers UK will, at its discretion,
repair or replace the item free of charge within a reasonable time
once it has been returned to Rogers UK or an appointed Rogers UK
dealer or service engineer. Rogers UK is not liable for any shipping
charges incurred whilst transporting the product to or from Rogers UK
or an appointed Rogers UK dealer or service engineer, should the item
require service or repair during or after the Warranty period. If the
product must be shipped, please use the original packaging materials
and include a copy of the original sales receipt along with a note
explaining, in as much detail as possible, the problems you are
experiencing with the unit.
Only use a reputable Courier Service or Shipping Agent, and ensure
that your product is insured during transit. Any servicing, repairs or
modifications not authorized by Rogers UK, or carried out by persons
other than appointed Rogers UK service engineers will invalidate any
warranty.
This Warranty does NOT cover: - Damage sustained whilst in the
possession of a shipping agent, retailer or consumer and not caused as
a direct result of defects in materials or workmanship.
Damage caused by normal wear and tear.
Damage or defects caused by abnormal or unreasonable use.
Damage caused by accident, acts of nature, misuse or neglect.
Damage caused by a failure to follow the operating and installation
instructions supplied with the product.
Damage caused by improper or careless cleaning.
Rogers UK reserves the right to refuse warranty for any component of
which the serial number has been removed, defaced or tampered with.