Tips for 6-source input-selector?

[joensd]

Hello!
This is my first post.
I recently built a LM3886 amplifier and wanna add an input selector (6 sources at least).
I haven´t researched alot but am interested in a solution without switches,relays.(for example mos switches 4066?)
Does anyone know good schematic,link where i can get a good working circuit for that.
It should have either up/down-switch to go through the sources or one switch for each source.
The quality should be "hifi" as well.
thanks in anticipation for any hints

 

[Geoff]

You could have a look at the Analogue Devices SSM2160 which gives switching for six channels plus digitally controled volume and balance or if you only want the switching you could use a couple of SSM2404 quad audio switches. Similar devices are available from National Semiconductor and other ic manufacturers, though AD products are noted for their superior sound quality.

 

[joensd]

thanks geoff!
those devices look really cool.
just have to find a distributor and get those.
anybody built an input selector with those?
would like to see a complete application.

 

[paulb]

I built an input selector using the SSM2404. Worked great. Pretty much followed the datasheet; as I recall it needs a buffer afterwards for proper operation.
Email me if you would like more details.

 

[Brownlow]

Input selector

Paul B,

I also have the SSM2404 chips, I would be interested as how you implemented them. Ideally, I would've preferred a 5 input source selector but, I'll settle for four. What would be the pitfalls if any?

Cheers


Brownlow

 

[promitheus]

I would use a 2x6 (even better a 4x6) rotary switch and cable the inputs directly from RCAs to switch. It easy, its cheap and it sound the best.
YOu can even find boards for this job from different DIY suppliers.

 

[JoeBob]

Curious, why would a 4x6 rotary switch be any better then a 2x6 rotary if you're only doing two channels?

 

[gromanswe]

WHAT is a Selector

Curious, why would a 4x6 rotary switch be any better then a 2x6 rotary if you're only doing two channels?

I built my own input.
I am a man - No Monkee

Pre amp have only one channel.
I use High Quality Audio Signal Cable (see brand elsewhere)
So I Change My source by Changing
The Input of my cable to
any Source

- I want to LISTEN - yes, LISTEN - to. -

So your term Selector needs a little more
EXPLAINING

but what would anyone know

 

[promitheus]

With a 4x6 rotary switch you can also connect and disconnect the grounds of every signal so you can avoid ground looping of the sources, or you can also control balanced signals if there are any.

On my preamp I have a 4x3 switch because I use to allways get shocked when touching the metal boxes due to high voltage of the chassis of the TV or video. Does anybody know this feeling from connecting unconnecting SAT receiver, TV or Video ?
It sucks.

 

[chris ma]

5 in 1 out

Hi,

When I made my switch box I bought a switch from DACT that I found it is excellent, the problem here is missing 1 input in your case.


DACT CT3
Audio Input Selector Switch
DESCRIPTION
CT3 is a high quality Audio Input Selector
Switch.
It is based on the same high precision, Swiss
made switching mechanism as the DACT CT1
and CT2 audio attenuators.
CT3 is a non-shorting type of switch making
sure neither of the input sources will be shortcircuiting
each other when the switch is
operated.
CT3 switches two channels simultaneously. For
both channels, it switches signal AND ground.
This is an effective way to minimize the risk of
creating ground loops.
TYPICAL APPLICATIONS
- Input selector in Do-It-Yourself Hi-Fi / audio
projects
- Input selector switch in active or passive
preamplifiers
- Selector switch in professional audio
equipment
- Switch for long lifetime applications
- Test equipment selector switch
FEATURES
- 4-pole switch (switches signal and ground on
two channels simultaneously)
- Gold plated contacts for long lifetime even in
hot and humid environments
- High reliability
- Matches perfectly with DACT CT1 and CT2
audio attenuators
- “Programmable” for 1 to 5 postions
OUTLINE DRAWING AND
DIMENSIONS (mm)

Very compact 5-positions audio input selector switch (switches between up to 5 input sources)

Switches 2 channels with signal and ground simultaneously (4 poles)

All contacts are gold plated for long lifetime even in hot and humid environments

Same basic construction and size as the DACT CT1 and CT2 audio attenuators

Ideal together with DACT CT1 or CT2 for active or passive preamplifiers


Regards,
Chris

 

[chris ma]

The silver thing is my switch box next to the DIP upsampler, total cost of material is around $200 cdn. Anyone want to guess what the case is?

 

[Peter Daniel]

I try to avoid selector switches in my main system. After all, it's a reference system and I'm using only one (the best) source. So no need for switching. I believe that even the best switch, has some influence on sound and can degrade it in some extend. Little inconvenience is a small price to pay for quality (whenever I have to switch sources I just switch cables)

Even my new preamp will have only one input (RCA and balanced) and no switch.

Previously, I was usually using multiple relays to do switching (both signal and ground).

 

[chris ma]

Peter,
I totally agree with you when quality matters, is just that I do not trust myself sometimes you know you are a bit absent mind and pluging and unplug interconnects in a bad way/procedure expecially in a party with a few pints, may blow/short some kits by mistake.

 

[jleaman]

the case looks like a butter cover.

 

[Peter Daniel]

Hey Jason, how you like my Swiss relays?

 

[chris ma]

Close Jason,

It was a baking util from a dollar shop, I paid one dollar for it. It was tough to work on stainless steel, I had to drill small holes and file it to the size in order to accept the RCA plugs. 12 of them and one big one in the front for the DACT switch.

 

[jleaman]

them little black ones. there nice i so wish i had some plans to build a switch for my volume either relay controled or some fationed way some thing nice and perfect to work with my aleph amps. YES IM KINDA ASKING YOU PETER HELP ME

 

[jleaman]

ive been lookin on the form for people who made a balanced volume control but no luck but as i think about it i cant use one any way because my main input is rca so no worries. but the sound out will be balanced right ?

 

[Peter Daniel]

Maybe we should wait a bit more. Nelson Pass was mentioning recently that Wayne is pretty close with finishing the volume control project.

If you really want to make it easy, buy a switch from Michael Percy and install some resistors (he will include schematic). It may cost you between $100-200.

 

[jleaman]

that is kinda alot for me for just one control i was told to use a nice aleps control. can you get them steped. ?