History   of   the   Lafayette   LA-125   Amplifier   Series
from   1967   to   1977
| LA-125T (1967-68, 1968-69)   LA-125TA (1969-70, 1970-71)   LA-125B (1971-72)   LA-150 (1972-73, 1973-74)   LA-1050 (1974-75, 1975-76, 1976-77)

NOTE ..... External web-links to PDF files are in the form of underlined, blue-colored text.

---

Special Info About LA-125T and LA-125TA Inputs

Tape Head ... on the 125T
The Tape Head inputs of the LA-125T were optimized to accept direct input of a non-amplified tape head signal, which was normally
at the same low millivolt level as that for magnetic phono pickups. When tape deck units started coming out with their own built-in
head amplifiers (from the late 1960's onward), integrated amplifiers like the LA-125TA did away with the Tape Head option.

Mic-Musical ... on the 125T and 125TA
The LA-125T and LA-125TA microphone-musical instrument inputs were stereo, but there was only a single 1/4-inch standard
phone jack. For stereo usage, this single jack required a y-adapter cable with a 1/4-inch 3-conductor phone plug at one end and
two single channel jacks (either 1/4-inch phone, 1/8-phone or XLR) at the other end. If such adapters were not readily available,
then one could easily be made from individual components found in consumer electronics catalogs such as those from Lafayette,
Radio Shack, Allied, Olson, Burstein-Applebee, Switchcraft (audio cable specialist) and similar firms.

Under the right conditions, one could also hook-up a mic mixer (either passive, or powered with low-level output) to the LA-125T/TA's
mic-musical jack. BTW, the mic-musical inputs accepted mike-instrument-other devices with at least 50,000-ohms impedance.

Ceramic Phono ... on the 125T and 125TA
The Ceramic Phono inputs of the LA-125T and LA-125TA accepted an incoming signal of up to 80 millivolts for full amplifier output.
By modifying an RCA phono plug cable with the appropriate resistors, or by creating a switchbox (if an assembled one was not
available) containing multiple input level settings, hi-fi equipment such as tuners and tape units with higher levels of signal
delivery (250-or-more millivolts) could be safely attached to the Ceramic Phono inputs, making them a pseudo Aux-2 input.

Below -- A rough-drawn illustration of what a switchbox for the 125T-TA ceramic inputs might have looked like, at least on the front side.
There might be, say, three separate input sources, each having a millivolt range choice, as well as screwdriver adjustable levels.
The back side would surely have had RCA phono plug inputs for the three sources, and an output to the 125T-TA ceramic input.

---