Mission 762 Recap

[Ctdubbin]

i don't need or want anything from the AudioKarma community, i just couldn't find any exact pictures of the crossover network this set of late 80's/early 90's mission 762 used.

just figured i'd leave it here in case anyone else needs it. I'll probably update this as i decipher the actual capacitors used in order to to recap this unit.

Edit: Brown is a resistor.

Edit: light blue is a Tesla TF202 2.2uf 50v Axial Electrolytic Capacitor

edit: dark blue is a 3.3uf 50V Alcap Bipolar Axial Electrolytic Capacitor

 

[StimpyWan]

The 2 caps are wired in parallel. So in theory, you could use a single 5.5uF cap, as a replacement.

 

[Ctdubbin]

The 2 caps are wired in parallel. So in theory, you could use a single 5.5uF cap, as a replacement.

My understanding of the circuit design of a crossover suggests that it was a deliberate choice to use two sets of caps.

Capacitors act as "filters" for frequencies with different sizes handling different frequencies.

I have to surmise that splitting the filtering duty into 2 smaller caps has some level of advantage in reproducing sound over a single big cap, and so I've ordered replacement caps of original spec.

 

[StimpyWan]

Parallel caps have lower ESR, resulting in less resistance to the tweeter. So, the capacitors have less effect on the tweeter balance. Maybe that was the intention of the design? Poly caps generally have less ESR too, if that type of capacitor was being considered?

 

[Riccardo77]

Did the recap improve the sound? Got a pair of these for free that needed refoaming. Did the foam and sound is quite good. Replaced my JBL S26ii on a daily listening rig. It is not as good as the JBL on rock but was really good at other types of music and especially the typical Christmas tunes. Wanted to know if a recap would help improve the sound even more.

 

[Ctdubbin]

The next person will have to tell you, I recapped + refoamed at the same time.