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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Passive pre-amp for active speakers
Passive pre-amp for active speakers
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Old 10th January 2018, 08:28 AM   #1
sidlauskas is offline sidlauskas  Lithuania
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Default Passive pre-amp for active speakers

Hi,

I'm looking for very simple and primitive passive preamp with few analog inputs and volume control which I will use with my active speakers. Any thoughts?
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Old 10th January 2018, 09:47 AM   #2
DF96 is offline DF96  England
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Buy a box. Buy a volume control. Buy some sockets. Put the sockets on the box. Put the volume control in the box.
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Old 10th January 2018, 10:18 AM   #3
Nico Ras is offline Nico Ras  South Africa
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You forgot to add crushed ice and shake it up.
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Old 10th January 2018, 11:13 AM   #4
brig001 is offline brig001  United Kingdom
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You could get one of these or similar: http://cpc.farnell.com/pro-signal/ps...tch/dp/AV12769 this one even looks like it has room for a volume control on the left. No guarantee that there is space inside of course...

Brian
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Old 10th January 2018, 01:05 PM   #5
sidlauskas is offline sidlauskas  Lithuania
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Quote:
Originally Posted by DF96 View Post
Buy a box. Buy a volume control. Buy some sockets. Put the sockets on the box. Put the volume control in the box.
Not this time. I'm looking for something what is ready to use out the box. Actually I managed to find something, but it's way too expensive:

Tisbury Audio - Mini Passive Preamplifier

I would definetely buy it for 1/3 of it's price. Any other ideas?

Last edited by sidlauskas; 10th January 2018 at 01:08 PM.
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Old 10th January 2018, 01:11 PM   #6
scottjoplin is offline scottjoplin  Wales
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Chances are that you will pay well over the odds for anything ready made, in a box, etc.
your link is a prime example of the trendy offerings available.
You might find something suitable on eBay (though it might need putting in a box)
This is DIYaudio..........
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Old 10th January 2018, 01:36 PM   #7
C37 is offline C37  Belgium
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It will work but be aware that a buffer stage after volume will work wonders even with short interconnects, at least that is my experience with Genelecs and Tannoy actives in nearfield monitoring. You can add this at a later stage, Enjoy!
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Old 10th January 2018, 03:17 PM   #8
DF96 is offline DF96  England
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Quote:
Originally Posted by sidlauskas
Not this time. I'm looking for something what is ready to use out the box.
Sorry. The fact that this forum is called DIY audio must have confused me.
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Old 14th January 2018, 12:22 AM   #9
georgehifi is offline georgehifi  Australia
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Quote:
Originally Posted by sidlauskas View Post
Hi,

I'm looking for very simple and primitive passive preamp with few analog inputs and volume control which I will use with my active speakers. Any thoughts?
Watch out, many active speakers have 10kohm sometimes 5kohm input impedance on the input of their amps, courtesy of Class-D. This will cause maybe a voltage divider with the passive, and you loose voltage headroom.
Do you know what the input impedance is of the active speakers not just at 1khz but from 20hz to 20khz just incase there are input cap/s.?

Cheers George
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Old 14th January 2018, 12:59 AM   #10
Good E Nuff is offline Good E Nuff  United States
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How about a passive mixer?

ART SPLITMix4 Four Channel Passive Splitter/Mixer

Or this:

Amazon.com: Nobsound Little Bear MC102 Mini 2(1)-IN-1(2)-OUT 3.5mm Stereo Audio Switcher Passive Selector Splitter Box: Home Audio & Theater

Last edited by Good E Nuff; 14th January 2018 at 01:06 AM.
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