Collecting components for a passive preamp, is it possible to parallel RCA outs on the rear and use the second set as line level subwoofer inputs? Would this cause any adverse effects?
Source: RPI DAC TBD
Speakers: 8ohm paradigm signature S3
Subwoofer: SVS SB-3000
Source: RPI DAC TBD
Speakers: 8ohm paradigm signature S3
Subwoofer: SVS SB-3000
As long as it has a Volume pot it's fine, You want to control the level.
IF You control the Volume level on the amp, Your sub receives always max signal since its fixed.
The sub should have a low pass filter, since You are feeding it with the whole frequency range.
Better would be to buffer the signal before the sub RCA's and eventually incorporate a low pass filter.
IF You control the Volume level on the amp, Your sub receives always max signal since its fixed.
The sub should have a low pass filter, since You are feeding it with the whole frequency range.
Better would be to buffer the signal before the sub RCA's and eventually incorporate a low pass filter.
By itself combining two full range RCA outputs into one subwoofer input is a bad idea.
For a passive pre-amp and a sub output it's even worse.
For a passive pre-amp and a sub output it's even worse.
Thanks for the feedback. The SVS has quite a sophisticated phone app for adjusting EQ, room gain, low pass and slope.
The outputs will be xontrollwd via a 24 stepped 10k pot. As a buffering requires power and I hope to keep this unit passive is there anything else I can do to improve the setup?
The outputs will be xontrollwd via a 24 stepped 10k pot. As a buffering requires power and I hope to keep this unit passive is there anything else I can do to improve the setup?
You could check out the Hong Kong Passive on Ebay (I think 99$). It has a dact in the impedance of your choosing and has multiple outputs, both line level and variable. Passive Preamp Pre-Amplifier audiophile Grade SMD DACT type Attenuator | eBay
I don't understand how it would be different from using a Y-cable, though..? Wich most times work good enough. Speedskater: Would you care to elaborate a little bit..?
/Hilding
I don't understand how it would be different from using a Y-cable, though..? Wich most times work good enough. Speedskater: Would you care to elaborate a little bit..?
/Hilding
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I'm confused as to what you want to do? That sub has loop-thru line outputs.
Also strange that a sub with Blue-Tooth programing doesn't have balanced inputs.
Also strange that a sub with Blue-Tooth programing doesn't have balanced inputs.
Wondering why JBL engineers did it on my sub.
What about speaker level input isn't it the same ?
You must somehow combine both channels, but not with an Y cable.
Don't connect both speakers together with an Y cable or You'll blow Your amp.
You must use resistor mixing even on the RCA's or You will have channel crosstalk.
I don´t really see the point in so called "passive preamps"
Good in theory because they have "zero distortion", "zero hiss" ... etc.
In practice, since they are fed from a very active source and drive a very active amplifier, very much doubt you improve sound at all by making a very long chain just one small link shorter.
And that, if you make the full system very simple.
As long as you make it more complex such as now, what´s the point?
Good in theory because they have "zero distortion", "zero hiss" ... etc.
In practice, since they are fed from a very active source and drive a very active amplifier, very much doubt you improve sound at all by making a very long chain just one small link shorter.
And that, if you make the full system very simple.
As long as you make it more complex such as now, what´s the point?
I guess I began sourcing parts for it to be a simple volume/switcher. Realising I could potentially add a subwoofer it went from there. Now i am stuck with the pricey components.
Ideally I'd run two seperate interconnects to the subwoofer inputs. The volume control would be controlled by the passive 10k ohm.
Is it advisable to add some non-polar caps to prevent subwoofer feedback?
Ideally I'd run two seperate interconnects to the subwoofer inputs. The volume control would be controlled by the passive 10k ohm.
Is it advisable to add some non-polar caps to prevent subwoofer feedback?