jc's tractrix bass bin

Last post 11-18-2009 1:57 PM by ClaudeJ1. 169 replies.

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07-04-2009 3:35 PM In reply to

jwc
Joined on 11-14-2004
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Posts 4,383

Re: jc's tractrix bass bin

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Mark.

I monkeyed with going more -dB on the 1-2K. It sounded less lively...

The 14+....I'm gonna need to mess with that some more. Sounds great the way it is.....but it was gonna take a lot of EQ to get that curve up there. I hesitated...and left it. I'm sure you can appreciate that experience.

I quit messing with this and addressed some "Hiss" I was getting from the addition of the EQ. I'm using RCA and not XLR to the EQ. That may be it. This is coming straight from the MCD500 DAC.......

Just need more time with it. I'm out of town right now.

I forgot how much I missed the "big sound" with the K402.....the midrange is nuts. A lot of the vocals are coming out of the bass bin too.

07-04-2009 4:33 PM In reply to

mikebse2a3
Joined on 02-01-2004
TN
Posts 2,338

Re: jc's tractrix bass bin

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jwc:

I quit messing with this and addressed some "Hiss" I was getting from the addition of the EQ. I'm using RCA and not XLR to the EQ. That may be it. This is coming straight from the MCD500 DAC.......

Hey jc

Sorry if I missed it but if you don't mind please list(models) your equipment chain as you have things setup now.

You probably already did this but in case If the EQ unit has an overall gain control and you didn't have hiss before maybe reducing the master level would help.

At any rate using a dummy shorting plug on the inputs starting from the amps working backwards should be the fastest way to isolate were the hiss is being introduced.

Very interesting and as always I enjoy your experiments!

mike tn

Einstein: "Not everything that can be counted counts, and not everything that counts can be counted"

07-04-2009 6:54 PM In reply to

dtel
Joined on 03-01-2003
south mississippi
Posts 5,753

Re: jc's tractrix bass bin

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Just reading to keep up with progress, glad there inside with an official OK. Yes

"Life should NOT be a journey to the grave with the intention of arriving
safely in an attractive and well preserved body, but rather to skid in sideways,
Champagne in one hand - strawberries with whipped cream in the other hand, body
thoroughly used up, totally worn out and screaming WOO HOO - What a Ride!"

07-04-2009 9:37 PM In reply to

ClaudeJ1
Joined on 07-09-2006
Detroit Area
Posts 1,406

Re: jc's tractrix bass bin

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I'm a fan of straight axis horns, reserving folded ones for below 200 Hz. You may find some truth in what I say to various degrees as you listent to this setup. Nice job.

Claude
7.1/2.1 wall of sound Stacks: Front L&R=MWM-s Clone Bass 2ft. from corner, PV MB-1 midbass, JBL 2446J/2360 midrange horn with drivers jammed into corners (time align), Double Stacked Twin Tweeters B&C DE10/ME10 horn twins, Front& Center=PVFH1/EV-EVDH1A/JBL2380, L&R Sides and Rears=Four Peavey SP-1(CheapScalas), Twin VMPS Large Subs firing into fron corners., Driven by an Onkyo 706 Receiver, B&K Amp on VMPS Subs. Hats off to Tom Holman and Audyssey EQ!!

07-04-2009 10:01 PM In reply to

jwc
Joined on 11-14-2004
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Re: jc's tractrix bass bin

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Mcintosh MCD500 which is a SACD/CD with DAC digital inputs. Using as a "preamp"

Ashly PEQ 572 analog paramentric EQ with high and low shelve options.

Ashley XR 2001 XO

biamp with a pair of MC250 amps

Dual trac 100 bass bin for 500Hz and below

K402 and 510 with ESN5800 network for 500Hz and up. K1133 and K69 drivers.

I put in and out cheater plugs. Less hiss w/o plugs. I'm sure it is an input gain issue I need to work with.

I am very happy with the sound with a PEQ around 600Hz (barely), 1.5K and somewhere out ther 14+. I kinda dialed in the last one for "sound". The high shelve....I couldn't get to sound the way I wanted......will work with again.

I am very pleased to have the K402 back in there.

My guy building my subs just emailed me to tell me they are done. Hopefully will pickup by the end of the month.

07-04-2009 11:09 PM In reply to

seti
Joined on 07-06-2004
Arcansaw
Posts 6,309

Re: jc's tractrix bass bin

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jwc:
My guy building my subs just emailed me to tell me they are done. Hopefully will pickup by the end of the month.

Can't wait to see these...

First off, I don't even consider myself a member of the general public. I know that my own requirements in a loudspeaker are those I've discussed. Judging from what contact I have with the general public, though, I conclude that 99 percent of the general public doesn't even know what accuracy of reproduction is. My company is for the one percent composed of perfectionists who buy these expensive speakers.

http://itishifi.blogspot.com/

07-06-2009 10:13 AM In reply to

mark1101
Joined on 06-04-2003
Athens, Georgia
Posts 3,349

Re: jc's tractrix bass bin

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Please post pics of the new subs when you can JC.

KPT-MWM-S-LF & KPT-402-HF, '73 Cornwalls (C DB 15), '90 LaScalas (LS FB TG), '77 LaScala (LS BR), '81 Heresys (HOL), '83 Heresys (HWO).

08-08-2009 8:38 PM In reply to

jwc
Joined on 11-14-2004
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Re: jc's tractrix bass bin

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08-08-2009 8:39 PM In reply to

jwc
Joined on 11-14-2004
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Re: jc's tractrix bass bin

IMG_2137-small.jpg

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08-08-2009 8:49 PM In reply to

seti
Joined on 07-06-2004
Arcansaw
Posts 6,309

Re: jc's tractrix bass bin

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How is the sound? Looks great!

08-08-2009 9:20 PM In reply to

jwc
Joined on 11-14-2004
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They sound good. They don't go real low......usual for a horn sub though. Efficient and easily keep up with the rest.

I need to work on the setup a little more. It is hard when not in stereo. I need to finish that last tractrix bin.

08-09-2009 7:48 PM In reply to

jwc
Joined on 11-14-2004
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Re: jc's tractrix bass bin

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Had a chance to mess around with these today. Got them even with the rest of the system. I'm getting some room gain...in a favorable way. I had to add a touch of +PEQ at 45Hz which is a typical dip down for this sub. Xo'ed at about 70Hz with the tractrix bin. The tractrix bin is cutoff at 500Hz.

The bass is very good right now. I can't wait to get this in stereo soon.

08-09-2009 9:04 PM In reply to

GotHover
Joined on 11-16-2006
Spring Valley Lake Ca.
Posts 1,046

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JW, that looks sweet, the graphs look excellent as well.

Dave Harris.....What I don't know is alot. - amateur advice giver.
FastlaneAudio@AOL.com Home of the "Fastrac"

Currently enjoying active crossover - Modified Behringer DCX 2496

08-10-2009 1:46 PM In reply to

mark1101
Joined on 06-04-2003
Athens, Georgia
Posts 3,349

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Dang........you got your subs. Awesome........And I see you borrowed from your MCM grand system. That has to sound darn good. What powers the sub?

KPT-MWM-S-LF & KPT-402-HF, '73 Cornwalls (C DB 15), '90 LaScalas (LS FB TG), '77 LaScala (LS BR), '81 Heresys (HOL), '83 Heresys (HWO).

08-10-2009 3:31 PM In reply to

jwc
Joined on 11-14-2004
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Re: jc's tractrix bass bin

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mark1101:

Dang........you got your subs. Awesome........And I see you borrowed from your MCM grand system. That has to sound darn good. What powers the sub?

QSC PLX 1104. I will have a PLX 1804 in a few days and will probably use it. Same amp with more power.

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