|   Amp for Passive Sub... Need your HELP!!! | Todzilla
Apr 23, 2001 12:14 PM | | Hi Folks,
I'm trying to find a relatively inexpensive amp to power a passive sub in my bedroom system so I can more fully
appreciate my DVD player I just added there. This is definitely NOT an audiophile system (my living room is a different
story) and I don't want to invest a lot of bucks. Any suggestions??? |
| Any old cheap receiver would work | Azuth
Apr 23, 2001 12:24 PM | | Does your receiver(or amp) have a sub out? I've never used a passive sub before, but does it have a built in low pass filter? Either a sub out on the receiver or a built in low pass filter would make it very easy. |
| Any old cheap receiver would work | Todzilla
Apr 23, 2001 12:29 PM | | There is a sub out on the receiver (Harman Kardon AVR 110) and I do have an old cheap receiver. How do I hook this up to work properly? |
| Setup | RuSsMaN
Apr 23, 2001 12:35 PM | | Run the 'sub out' on your HK, to a line in (tape/aux) on the old receiver....
On the old receiver, select the proper source (tape/aux) and hook up the speaker wire....
Cheers,
Russ |
| Thanks, but... | Todzilla
Apr 23, 2001 12:41 PM | | Which speaker wires do you then run to the sub? Front L? Front R? Center? Some combination thereof??? It's an old Pro Logic receiver.
PS - I'm assuming I need to connect a Y-adaptor to the LFE line out to plug it into the cheap receiver... |
| Also... | Todzilla
Apr 23, 2001 12:44 PM | | At what volume level should I leave the old receiver (sub power) set at? Max? I would think the HK volume setting should control the signal output to the old receiver... is that correct? |
| Also... | manny
Apr 23, 2001 1:11 PM | | You won't get the LFE if you don't get an amp to run the sub. You will get better bass if you hook it directly, but not the full effect. Might want to spend a few bucks. It also may overtax your receiver. Things to think about. |
| 2 ways to do this..... | RuSsMaN
Apr 23, 2001 2:00 PM | | Either forget the OLD rec, and run the left and right mains from your NEW(er) rec to the sub, then from the sub to the main speakers.
Or, hook up the LFE out to either RIGHT or LEFT in (tape/aux) on the OLD rec, then run the same (RIGHT or LEFT) speaker wire to the sub. You can use a Y cable and then run both left and right speakers wires....if you want, but there wont be a difference (if there is only 1 LFE out RCA on the new rec, you only need to plug it into either LEFT or RIGHT on the OLD.
Do not set the OLD rec to MAX volume, start reasonably low and work up from there. It really depends on the power output of the OLD rec, and what the passive sub can handle. You can turn the OLD all the way down, then turn the NEW up to a reference volume of how you would normally listen to it. Then bring the sub volume up to 'blend' as you see fit.
Cheers,
Russ |
| 2 ways to do this..... | DueN
Apr 23, 2001 2:11 PM | | The first requires the sub to have a built-in amp with speaker level inputs and speaker outputs. The crossover is done at the sub amp, where the sub amp strips the signal of its low-frequency and sends the hi-pass signal onto the main speakers.
I would go for the second method if you have a passive sub. |
| Thanks to all... | Todzilla
Apr 23, 2001 2:38 PM | | You guys have been helpful in giving me some options to play around with. Your inputs are much appreciated... |
| Tested the setup last night. | RuSsMaN
Apr 24, 2001 6:01 AM | | Had an older Polk 10 inch, sealed, passive, sitting in my office. Pulled it out and used an NAD7220PE integrated.
My thoughts...DO USE the Y adapter, and feed a signal into both LEFT and RIGHT in on the amp for the sub. It worked both ways, but (dduuuuhhhhh) I got a lot more power using both left and right channels.
Cheers,
Russ |
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