Found a couple of Mission 77 bookshelf speakers in good condition. Not tested yet. Just wondering if they are worth keeping or modding. Thinking of using them in the bedroom or as workbench speakers. Did the usual search online and there are no reviews, so I'm assuming that they are not really considered any good. Am I wrong? Thanks.
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These are sealed box, shelf or stand mount speakers manufactured around 1990. https://www.retrotronics.co.nz/detail&id=1583
They'd suit a small room and would benefit from being positioned close to the rear wall for bass reinforcement.
I think they would give sterling service as workbench speakers.
And let's consider that Mission don't tend to make speakers that are "not really considered any good".
Specifications:
75 watts into 8 ohms – recommended amplifier 25-40 W
Dimensions: 37 cm H / 22 cm W / 25.5 cm D
Weight: 5.2 kg each
They'd suit a small room and would benefit from being positioned close to the rear wall for bass reinforcement.
I think they would give sterling service as workbench speakers.
And let's consider that Mission don't tend to make speakers that are "not really considered any good".
Specifications:
75 watts into 8 ohms – recommended amplifier 25-40 W
Dimensions: 37 cm H / 22 cm W / 25.5 cm D
Weight: 5.2 kg each
I've been reading this thread
The model 77 appears to use the same bass driver (Mission 70 S) and a VIFA D19 TD-5 tweeter (photo attached). Maybe I can make some improvements by recapping the crossover ( 5.7uF 50V and 10uF 50V non polarized as marked N-P). Any suggestions for improvements are welcome. Thanks.
The model 77 appears to use the same bass driver (Mission 70 S) and a VIFA D19 TD-5 tweeter (photo attached). Maybe I can make some improvements by recapping the crossover ( 5.7uF 50V and 10uF 50V non polarized as marked N-P). Any suggestions for improvements are welcome. Thanks.
Attachments
The NP electrolytic capacitors may or may not still be in spec after 35 or so years, but it would be an easy matter to replace them.
Substituting fresh NP electrolytic capacitors will ensure that (a) the original voicing of the speaker will be restored and (b) the replacement capacitors will fit comfortably into the spaces on the crossover board.
MKP Polypropylene film capacitors of the required values would be much larger than the electrolytics and would alter the voicing in a way that you may or may not prefer. It's up to you whether or not you want to experiment in this direction.
Today's standard values would be 5.6 uf and 10 uF, and I'd be happy with these Mundorfs from Wilmslow Audio:
https://wilmslowaudio.co.uk/mundorf-electrolytic-ecap-capacitors/56-fd-ecap70-electrolytic-capacitor
https://wilmslowaudio.co.uk/mundorf...pacitors/10-fd-ecap100-electrolytic-capacitor
Substituting fresh NP electrolytic capacitors will ensure that (a) the original voicing of the speaker will be restored and (b) the replacement capacitors will fit comfortably into the spaces on the crossover board.
MKP Polypropylene film capacitors of the required values would be much larger than the electrolytics and would alter the voicing in a way that you may or may not prefer. It's up to you whether or not you want to experiment in this direction.
Today's standard values would be 5.6 uf and 10 uF, and I'd be happy with these Mundorfs from Wilmslow Audio:
https://wilmslowaudio.co.uk/mundorf-electrolytic-ecap-capacitors/56-fd-ecap70-electrolytic-capacitor
https://wilmslowaudio.co.uk/mundorf...pacitors/10-fd-ecap100-electrolytic-capacitor