SpeakerTalk

Hagedorn

Question is

Can the B200 - SP1256's of the 105/3 be replaced with the B200 - SP1188 from the 104/2 ?

At least this has been done in my 105/3's by the privious owner, but do they have the same specs and do they match the system crossover - impedance etc. ?

I do feel they are a bit low on bass compared to the memory of my first 105/3's which i had from new.. Wink

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Thomas Hagedorn

audiolabtower · VIP Contributor 500+ Joined: 06 Jan 2009 Posts: 686

Sorry, don't know exact answer but the 1256 was also used in the production 104/2 when they changed to bi-wire terminals.

They also changed the SP number of the 104/2. This could either mean a significant change to crossover or just the fact the bi-wire was added. If you could find the crossover schematics of both 104/2s system SP3037 and SP3128 and if the values in the bass crossover are similar, then it's perhaps a good chance the drive unit parameters were similar enough to be interchangeable? If the crossover values are much changed, then maybe not such a good sign since the box parameters remained the same?

proffski · Posted: Mon May 12, 2014 4:30 pm Post subject:

I have the full schematic somewhere, cannot access till the weekend.
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tlmadsen · Posted: Thu Oct 26, 2017 8:45 pm Post subject:

Hi Proffski
Did you ever find the schematic ?. It would be quite good to know if SP1188 is basically the same as SP1256
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BR

Thomas

proffski · Posted: Thu Oct 26, 2017 8:55 pm Post subject:

tlmadsen · Posted: Thu Dec 07, 2017 10:41 pm Post subject:

Any news on this ?
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Thomas