Spendor bc 1 brochure

Page 1

Spendor specifications

Size 25in. x 11%in. x 12in.
Weight 31 lbs.
L.F. Unit SPENDOR 8in. {plastic
cone)
H.F. Units CELESTION Type 1300
S.T.C. Type 4001G
Nominal Impedance 8 ohms.
Frequency Range 45 Hz to 25 kHz
(:3 dB, 60 Hz to 14 kHz)
Power Rating 40 watts programme for
BC 1
50 watts programme for
BC 11
Input Connections Terminals

Acknowledgement is made to the
British Broadcasting Corporation
for permission to use theory and
test information in the design

of the louciSpeaker assemblies,

spendor

Spendor Audio Systems Limited

Kings Mill - Kings Mill Lane - South Nutfield
Redhill - Surrey - England RH1 5NF
Telephone: Nutfield Ridge 2554

Page 2

A new standard in
loudspeaker design

30 wrote John Shuttleworth in 'Studio Sound , comparing
the BC 1 more than favourably with other high duality
monitors built regardless of size and expense. Ralph
West in 'Hi-Fi News' found the BC 1 an exceptional
loirdspeaker, probably the best the reviewer has had in
his home to date'. Spendor's 'new standard' is based

on British Broadcasting Corporation design information,
and our loudspeakers are actually used by the BBC as
programme monitors.

As well as satisfyingthe professionals we also aim

to please the domestic customer, while at the same time
holding fast to our no-compromise design phil050phy.

Our reasoning is this. Even the most discriminating
purchasers often make their judgment of relative merits
on the basis of a comparison of printed specification
sheets, Spendor equipment will of course stand any

such comparison. But satisfaction achieved on this

basis is unlikely to last. There are good points in design
and manufacture which are not obvious from a glance

at the published figures. It's easy to make a loudspeaker
look good on paper. Its not so easy to make it sound
good. So, in accordance with that no-compromise design
philosophy, we make our own low frequency cone drivers

with an extended range. These, together with two h. f.
units and cross over equalisation circuits which are more

comprehensive than is usual, combine to produce an
exceptionally flat overall frequency response.

BC 1 Axial frequency response

Spendor studio series loudspeakers

There are Currently two models, the BC 1 and the BC 11,
both of similar design and appearance. The main
difference is in the BC 11 '5 extra power handling capacity.
The speaker grilles are covered in Vynair, and teak is

the standard cabinet finish, thOugh white, walnut or rose-
wood are available to order. The illustrated trolleys are
available in black, white, and satin-chrome.

A first hearing will confirm a noticeable freedom from the
colouration effects which are typical of conventional cone-
and-cabinet designs. Such freedom is the direct result of
our unconventional approach to the fundamental problems
of multiple speaker assemblies.

Both types use Spendor low-frequency units which carry
the sounds in the range 50Hz to 3kHz. These drivers
incorporate vacuum-formed Bextrene cones* and Specially
processed short coil sections which allow a much higher
power output and greater powervhandling capacity than is
normal with Speakers of this size. The upper audio range
is handled mainly by a Celestion type 1300 direct
radiator with additional output from an STC type 4001 G
unit. This secondary unit not only provides an extension
of the overall frequency range, but reinforces sounds in
the all important 10kHz region by improving dispersion.
But the ultimate test is in the listening. We believe that
no other loudspeaker sounds so completely natural.

As originally proposed by H.D. Haywood in "Wireless World"
March 1968.

Polar response