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Help me see design difference between 2 channelstrips
Help me see design difference between 2 channelstrips
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Old 14th June 2018, 11:40 AM   #11
jazbo8 is offline jazbo8
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Help me see design difference between 2 channelstrips
Lowering the noise floor for example is usually one of the reasons, or someone may have a preference for certain IC, etc.
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Old 14th June 2018, 11:53 AM   #12
Ted Krotkiewski is offline Ted Krotkiewski
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Ok thank you!

So, last question. Then I will leave you in peace!

In general, what are your thoughts on the design/components on the mini mixer?
I mean my only preferences of cahnnelstrips that I have worked with for many years are Neve 1073s / Api eq/pres as well as old 60’s Siemens stuff and all of them (maybe except Api’s), are totally crammed with components trannys etc..
is this a poor design in comparison?

Many thank you’s for your time!
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Old 14th June 2018, 12:02 PM   #13
jazbo8 is offline jazbo8
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Help me see design difference between 2 channelstrips
It can’t be a poor design, as some world famous studios and musicians used the Series 3 to make great albums, even though the Mini was not intended for the studios per se, the standard was still quite high, because BBC and the radio stations weren’t the easiest people to please.
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Old 14th June 2018, 05:16 PM   #14
Ted Krotkiewski is offline Ted Krotkiewski
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I told you I wouldnt bother you anymore but i lied..
Just out of quriosity. Since I want to get more into DIY electronics anyway.
What are the components and their function that I have marked with red on the new photo?
These are all components that the Mini mixer does not have.

Especially the silver/chrome small ones to the right. I remember I peeked into a Purple Eq once (attached aswell) and the guy knowing theese things pointed at the chromed small parts like the once marked and said that those had a very important impact on the sound.
but I that was years ago and I cant remember what it did.
Any idea of what those are?

Thanks a million again!
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Old 14th June 2018, 05:24 PM   #15
jazbo8 is offline jazbo8
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Help me see design difference between 2 channelstrips
Quote:
Originally Posted by Ted Krotkiewski View Post
What are the components and their function that I have marked with red on the new photo?
The round cans are metal-can IC's. The little square one on the left is a relay.

Quote:
These are all components that the Mini mixer does not have.
I guess they skipped the relay in the Mini, but the Mini does use IC's as well, just not in the metal-can packages.

Quote:
Especially the silver/chrome small ones to the right.
Those are the capacitors for the EQ section, and yes, they do alter the sound as a part of the filter circuit just they do in the Purple EQ.
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Old 14th June 2018, 06:56 PM   #16
Ted Krotkiewski is offline Ted Krotkiewski
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Quote:
Originally Posted by jazbo8 View Post
Those are the capacitors for the EQ section, and yes, they do alter the sound as a part of the filter circuit just they do in the Purple EQ.
Ahhh bummer.. so there is a difference in the audio chain then

I wonder what effect it has on the sound with the Mini mixer not having those?
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Old 16th June 2018, 09:43 AM   #17
jazbo8 is offline jazbo8
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Help me see design difference between 2 channelstrips
Not really, the Mini just uses a different type of capacitor, you can replace them with the "silver/chrome" ones (likely polypropylene or polystyrene) if you like.

The location of the filter network capacitors in the Mini (likely polyester) are shown in the box below:
Mini.jpg
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Old 20th June 2018, 09:34 AM   #18
JohnDH is offline JohnDH  Australia
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I was peering at the pictures to try to read the opamp IC specs, but not quite sharp enough. Replacing them would be a great idea if possible, and easy if they are socketted. All the design theory and form-factor pin-outs etc are still the same for many modern ones, but pin-compatible newer designs are much lower noise.

I have an ancient 12 channel mixer from 1979, a really solid piece of gear from that time using 741 opamps. But my 15 year old Soundcraft is way quieter. Also, I built a stereo amp in 1979, and upgrading the chips 10 years later was a big improvement.
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