Music Trade Review -- © mbsi.org, arcade-museum.com -- digitized with support from namm.org
THE MUSIC TRADE
REVIEW
SEPTEMBER 26, 1925
New Developments in Loudspeakers
Radiola Loudspeaker Model 104
The outstanding loudspeaker develop-
ment in the radio art, built on an entirely
new principle. Reproduces orchestra, band,
pipe organ and other musical instruments
with volume equal to the original at the
broadcasting studio, with acoustical fidel-
ity hitherto unattained. Gives amazingly
accurate voice reproduction. Volume of
reproduction can be varied from mini-
mum to maximum without impairment
of quality. Operates directly from a 110
volt 60 cycle A. C. circuit, and when used
with Radiola 25 or Radiola 28, supplies
plate, grid, and filament voltages for oper-
ation of complete radio set as well as loud-
speaker, thus replacing all batteries. May
be connected to first audio stage of any
radio receiver, but its capabilities are par-
ticularly realized with RCA Radiolas.
List price, including all Radiotrons and
Rectrons
$245*00
Radiola Loudspeaker Model 102
A new RCA, A. C. operated Cone Loud-
speaker equipped with rectifier-amplifier
unit for operation from 60 cycle, 110 volt
A.C. lighting circuit. Has same tone quality
as Model 104 and provides volume far in
excess of existing types of loudspeakers.
Recommended for connection to firstaudio
stage of broadcast receivers and particular-
ly for use in conjunction with RCA Ra-
diolas. Operated by new super-power
amplifier tube, Radiotron UX-210 andnew
RCA Rectron UX-216-B.
List price, including Radiotrons and Rec-
tron
$140.00
Radiola Loudspeaker Model 100
New RCA special Cone built on the new
principle, achieving new clarity of tone
and a far wider tone range than existing
types. Designed for direct connection to
output circuit of broadcast receivers. Par-
ticularly recommended for Radiolas 20,
25 and 28, dry battery operated,
List price
$35*00
Radiola Loudspeaker Model UZ-1325
The RCA standard of the horn type, uni-
versally commented upon as providing
clea rest reproduction of horn types of loud-
speakers. Equipped with an adjustable
diaphragm. Requires no external batteries
for additional amplification,
List price
$18*00
A, C* Rectifier-amplifier
RCA Uni-Rectron Model AP-935
Rectifier-power amplifier unit—same as
that supplied with Model 102 Loudspeak-
er. May be used for operation of any type
of loudspeaker from 60 cycle, 110 volt
A. C. lighting circuit. Amplification ob'
tained from new RCA super-power ampli-
fying tube, Radiotron UX-210.
List price, complete with Radiotron UX-
210 and Rectron UX-216-B . . $105*00
"B" Battery Eliminators
RCA Duo-Rectron Model AP-9^7
America's first "B" battery eliminator de-
signed to supply plate voltage to any type
of radio broadcast receiver using any type
of tube up to ten Radiotrons 201-A. Sup-
plies plate voltages at 2 2 ^ , 45, 90 and 135
volts with maximum current output at 50
milliamperes. Through use of RCA glow
lamp, Radiotron UX-874* this model pro-
vides uniform voltage at all current outputs
from minimum to maximum. Operates
detector as well as amplifier tubes from
110 volt, 60 cycle A. C. source. A. C.
hum completely eliminated.
List price, with Radiotron UX-874 and
Rectron UX-213
$6$.OO
Radiola
LOUD SPEAKERS
REG. U.S. PAT. OFF.