Martin Audio – MA1400 Amplifier
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NGLISH
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Reverse operation of Channel B.
5.3.3
Tandem mode
In tandem mode channel A input is linked to channel B input, either input socket may then be used to provide the
input signal. Tandem mode is activated by placing the two central switches (4 and 5) in the "ON" position (UP).
Bo th input attenuators' are active, allowing you to set different levels for each channel. Note that only the inputs are
connected in parallel. This is NOT a parallel output mode. Never connect either output terminal to ground or in
parallel.
You can use the remaining input connectors to parallel off “Daisy - chain” signals to other amplifiers.
NOTE: Always turn off the Link switches when using the amplifier for Bi-amping.
5.3.4
Bridge mono mode
B ridg e m on o m od e is used to d elive r incre ase d po w er to the lo ud sp ea kers. Usin g
the M A1 4 00 in b ridg e m od e red uce s th e n um be r o f o utpu t cha nn e ls fro m two to
o ne . Th e n om ina l im p ed an ce of th e lo a d mu st be m o re tha n 3 o h ms. Se t the
L in k/Bridg e A +B switch es to "ON " (UP ) a nd u se eithe r of th e inp ut co nn ectors A o r
B . Yo u can u se th e rem ain in g in p ut co nn ecto r to carry a pa ra lle l sig na l to othe r
a mp s. B o th A an d B level atte nu a to rs mu st b e a t the sam e p osition . W e
recom me n d th e y a re u se d in the 0 dB fu lly clo ckw ise p ositio n . Th e lou dsp ea ke r
sho uld n ow b e con ne cte d to C ha nn el A ou tpu t S pe akon . (+1 sh ou ld be co nn ecte d
to th e [+] p o sitive te rm ina l of th e lou dspe a ke r, an d -2 to th e [-] n eg ative term in al of
the lou d sp ea ker.
5.3.5
Bridge mono mode features
Bridged mono mode combines the power of two output channels into one. This results in twice the voltage swing,
four times the peak power and just less than three times the full power of a single channel.
This is because the coil is driven with positive voltage at one pole and an equivalent negative voltage at the other
pole. So, if an 8 ohms load is connected in bridged mode, one channel shares one 4 ohms part of the load, and the
other channel shares the other 4 ohms part. The power into 4 ohms from an MA 1400 is 700W. So, the total
bridged power into the 8 ohms load will be 2 x 700 = 1400W
All material © 2007. Martin Audio Ltd. Subject to change without notice.
