2. amps-preamps
  3. 161668-121115

Hi-Pass Filter Into Amp

I am hoping for some feedback.  I am dedicated to running subs with a 100hz-120hz crossover.  I am addressing a room resonance when running main speakers full range.  I see Vandersteen sells what appears to be a passive 6db/octave crossover in the form of an interconnect with small casing.  They are adjustable I assume with dip switches controlling parameters due to amp input impedance.  Is there more to it than what meets the eye?  Has anyone made their own interconnects with specific capacitors wired in?  Or hardwired your amp at the inputs?

I am feeding an Audio Research DS450, 300Kohm input impedance.  AR LS16 preamp.  Custom Fritz LS towers with bass driver sealed to reduce low freq output.  Rhythmik subs, pair.

Thanks!
pebblesr2
4 responses Add your response
georgehifi's avatar
georgehifi
10,312 posts
 
Yep, just a simple cap will do the job for you
1st order roll-off, not good for much.

Get the Loki pebblesr2, you’ll love it like others do, and you’ll have other uses for it as well.

Like setting it flat and having a very good discrete buffer should you ever need one.
Frequency Response: 20Hz-20Khz, -0.1db, 2Hz-850KHz, -3dB, 75ohm output impedance and the other specs as good as the best pre’s around.

You can do contouring as well if you have bottom end standing wave at certain frequencies in your room.

There is also a bypass switch so you can instantly hear while playing what your setting effects are doing for you.

Cheers George
erik_squires
16,058 posts
 
Yep, just a simple cap will do the job for you, but I do agree that generally speaking, the normal range of HP is around 80 to 100 Hz. On the other hand, these are 1st order (6dB/ocatve) so you may need to start a little higher to get the right effect.
georgehifi's avatar
georgehifi
10,312 posts
 
pebblesr2
Hi-Pass Filter Into Amp
Just get one of these, they’re discrete no opamps, transparent and very versatile, and cheap.

https://www.schiit.com/products/loki

Just look at all the different curves you can attain
https://www.superbestaudiofriends.org/index.php?threads/schiit-loki-eq-measurements.5153/

Cheers George
millercarbon's avatar
millercarbon
12,531 posts
 
100-120 is too high, should be more like 80. Also its much better to run the mains full range. There's nil to be gained, all the talk is just that, talk. On the other hand there is much to be lost. The main factor in good bass response is lots of low bass sources. Crossing over the mains removes their contribution to low bass and so actually harms your bass response.

You're taking something super easy and complicating it every which way. Leave your mains alone. Put your two subs near different corners, do NOT set them up symmetrically, set them to 80 Hz adjust levels and enjoy. Then go shopping for a couple more subs.
Log in to respond
More to discover
80x80
Boulder 2108 Phono Preamplifier
80x80
TriangleART M-100 Reference Tube Monoblock
80x80
VTL ST-150