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post #1 of 12 Old 02-21-2020, 02:26 PM - Thread Starter
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Subwoofer

My receiver doesn't have LFE or low level in input output audio jacks for subwoofer. In order to use a subwoofer I have to run speaker wires for high level subwoofer. Are there is way that I could hook up by using LFE or low level in input output audio jacks? Please advice how.

I'm currently using a vintage receiver and hooked up with equalizer.

Any inputs are highly appreciated.

Thanks,
ML
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post #2 of 12 Old 02-21-2020, 03:08 PM
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Quote:
Originally Posted by Musiclovers2 View Post
My receiver doesn't have LFE or low level in input output audio jacks for subwoofer. In order to use a subwoofer I have to run speaker wires for high level subwoofer. Are there is way that I could hook up by using LFE or low level in input output audio jacks? Please advice how.

I'm currently using a vintage receiver and hooked up with equalizer.

Any inputs are highly appreciated.

Thanks,
ML
New Receiver
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post #3 of 12 Old 02-21-2020, 05:36 PM
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There are speaker level to line level adapters available. They are mostly used for car audio, but I know of no reason they wouldn't work for home audio.

If your subwoofer accepts speaker level inputs, that would be the simplest way to go.

You won't get the benefit of having a crossover in the receiver, which splits offf the lows for the sub, but subs usually have variable low-pass filters that you can tune to get the best match to your primary speakers.

Last edited by bobknavs; 02-21-2020 at 08:40 PM.
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post #4 of 12 Old 02-21-2020, 08:58 PM - Thread Starter
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Originally Posted by bobknavs View Post
There are speaker level to line level adapters available. They are mostly used for car audio, but I know of no reason they wouldn't work for home audio.

If your subwoofer accepts speaker level inputs, that would be the simplest way to go.

You won't get the benefit of having a crossover in the receiver, which splits offf the lows for the sub, but subs usually have variable low-pass filters that you can tune to get the best match to your primary speakers.
By using speakers level line is not as powerful as using LFE or L R input audio?
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post #5 of 12 Old 02-21-2020, 11:42 PM
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As was said, just get a new receiver. LFE is different from crossover low frequency.

Vintage gear is awesome, whether speakers or amps. You can still use them in a modern setup.

Vizio P65-C1 (2016)
Onkyo Tx-NR656 (5.1.2 setup)
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post #6 of 12 Old 02-22-2020, 03:15 AM
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Quote:
Originally Posted by Musiclovers2 View Post
My receiver doesn't have LFE or low level in input output audio jacks for subwoofer. In order to use a subwoofer I have to run speaker wires for high level subwoofer. Are there is way that I could hook up by using LFE or low level in input output audio jacks? Please advice how.

I'm currently using a vintage receiver and hooked up with equalizer.

Any inputs are highly appreciated.

Thanks,
ML
New receiver if you want to use LFE input. You can manually equalize with a new receiver and have the advantage of bass management.

Kef LS50,Q200C, Q100, Kef Kube 10B (X2) , Denon AVR-X3400H, Panasonic 50" Plasma, Xbox One.
Bedroom: Kef Q100 ,JBL Loft 20, SVS SB-2000, Denon AVR-S710W, PS3, 32" Insigna LED.
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post #7 of 12 Old 02-22-2020, 04:06 AM
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https://www.crutchfield.com/p_543ADP...l-Adapter.html

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post #8 of 12 Old 02-22-2020, 08:34 AM
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You could buy something like the SVS SB-1000 or PB-1000 which has high level inputs

https://www.svsound.com/products/sb-1000

https://www.svsound.com/products/pb-1000

Or some HSU Subs
http://www.hsuresearch.com/products/vtf-1mk3.html

http://www.hsuresearch.com/products/vtf-2mk5.html

But getting those Crutchfield adapters would give you a wider range of choices.

Still a newer receiver with dedicated LFE and bass management would be the way to go.

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post #9 of 12 Old 02-22-2020, 09:32 AM
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Originally Posted by Musiclovers2 View Post
By using speakers level line is not as powerful as using LFE or L R input audio?
I have no idea what you mean. As far as I know, using the speaker level inputs would be identical to using the L&R line level inputs.

As someone else remarked, LFE is a separate channel in multichannel audio. A vintage stereo receiver won't decode that, I imagine. The sub out also gets lows from the mains (which is what the crossover is for).

Last edited by bobknavs; 02-22-2020 at 09:56 AM.
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post #10 of 12 Old 02-23-2020, 09:19 AM
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Quote:
Originally Posted by Musiclovers2 View Post
My receiver doesn't have LFE or low level in input output audio jacks for subwoofer. In order to use a subwoofer I have to run speaker wires for high level subwoofer. Are there is way that I could hook up by using LFE or low level in input output audio jacks? Please advice how.

I'm currently using a vintage receiver and hooked up with equalizer.

Any inputs are highly appreciated.

Thanks,
ML
Earthquake Sub 80.

Send the speaker wires to the Left +/- and Right +/- high level inputs of the subwoofer and then another set of wires from the Left +/- and Right +/- high level outputs of the subwoofer to your main speakers.

The sub will play everything 70hz and below and your speakers will play everything 70hz and above.

https://www.amazon.com/gp/offer-list...&condition=all

This other Earthquake sub is a bit less expensive and has a low profile which can be mounted facing the floor or a wall.

https://www.amazon.com/Earthquake-So...YDNA4RRANGHSCW

Geoff A. J., California
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post #11 of 12 Old 02-23-2020, 08:54 PM
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Originally Posted by gajCA View Post
Earthquake Sub 80.

Send the speaker wires to the Left +/- and Right +/- high level inputs of the subwoofer and then another set of wires from the Left +/- and Right +/- high level outputs of the subwoofer to your main speakers.

The sub will play everything 70hz and below and your speakers will play everything 70hz and above.

https://www.amazon.com/gp/offer-list...&condition=all

This other Earthquake sub is a bit less expensive and has a low profile which can be mounted facing the floor or a wall.

https://www.amazon.com/Earthquake-So...YDNA4RRANGHSCW
You're sure that the subs have a crossover function for speaker level inputs? That'd be good.

Not trying to be argumentative. I vaguely recall checking some subs in the past, which I think just passed through the speaker level signals.
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post #12 of 12 Old 02-24-2020, 07:23 AM
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Quote:
Originally Posted by bobknavs View Post
You're sure that the subs have a crossover function for speaker level inputs? That'd be good.

Not trying to be argumentative. I vaguely recall checking some subs in the past, which I think just passed through the speaker level signals.
No, you are absolutely right that most subs with speaker level inputs and outputs just pass through the entire signal to the mains full range.

The Earthquakes are one of the few I've found that have a high pass on their speaker level outputs.

From the Sub 80 manual, (the CP8 manual reads the same).

http://earthquakesound.com/index.php...rs/item/sub-80

Quote:
I) HIGH LEVEL OUTPUT - High pass filtered output terminals designed to power
up stereo satellite speakers.

J) HIGH LEVEL INPUT - Clamp style input terminal, accepts high level audio
input from the main or front system speakers (up to 10 volts).

The High Level input (I) for satellite speakers is fitted with a High Pass filter
(70Hz).

It is only powered when the main or front speaker signals are driven into
the High Level input (J).

These terminals are marked with red and black to
indicate the (+) & (-) respectively.

Geoff A. J., California
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