|"Acoustic Adapter gives you that "best seat in the house effect". The only device now made that adjusts for different size rooms, different ceiling
heights - adjusts for perfect performance in any size room."
"For best tonal effect, a radio must be balanced to the room. Or the room to the radio. Obviously, the room cannot be balanced to the radio - so,
Zenith has the Acoustic Adapter - a "tone balancer" to insure sharp, crisp, clear reproduction in any room. Once you've heard a Zenith in your
home, you'll never be without it."
|The 10S153 Acoustic Adapter Conundrum
|If the original Zenith service literature is to be believed, all 10S153 consoles came
from the factory fitted with loudspeaker part #49-156, which has no Acoustic Adapter
(AA) attachment. However, this information appears to be incomplete, as there are
numerous examples of this model around today which incorporate the alternate
loudspeaker (part #49-147) carrying the adapter and associated mounting hardware.
In late 2006 I initiated an informal survey on this subject at the AR Forums. Some
respondents reported their models as using part # 49-147 (with the adapter) while
others reported their's as using part # 49-156 (without). I myself have two of these
radios, both with adapters. A secondary finding was that the serial numbers of models
having/not having adapters do not appear to correspond to particular batches of
10S153 chassis production, though to be fair, the sample size was small.
To see if I could shed any further light on this matter I conducted a search of
numerous 1936/37 newspapers, looking for Zenith advertising featuring the 10S153. I
did in fact come across many instances, spread throughout the model year, where the
Acoustic Adapter was listed as a feature of the 10S153. However, there were almost
as many ads that did not.
Based on the evidence, it seems highly likely that the 10S153 models did in fact come
from the factory both with and without the Acoustic Adapter. I therefore feel justified in
including it on my list of 10S153 features - shown above.
Here's two of examples of what some of the Zenith advertising featuring the 10S153
had to say about the Acoustic Adapter...