BFD question...

al lout

Stunt Coordinator
Joined
May 6, 2004
Messages
164
Reaction score
0
Points
0
I decided to get a BFD to tame my AA Sealed Tempest Sub... I've got the SPL meter and burnt some sine wave tone on the CD already. Now, I have a couple questions:

1. When measuring the SPL responses, do I turn off all my other speakers (mains, center, surrounds) or do I leave them on?
2. Where can I get the BFD for cheap? (I am looking for the 1124 model)

Thanks in advanced...

Al,
 

Brian Fellmeth

Supporting Actor
Joined
Jul 30, 2000
Messages
789
Reaction score
1
Points
0


I would do a baseline curve with the sub only, then again with sats only (with the receiver sub directive still yes or on, but the sub silenced by being seitched off). This will give you a rough idea of what is happening in the tradeoff frequency range. Do not bother setting any filters however unless everything is playing.
 

Wayne A. Pflughaupt

Moderator
Moderator
Joined
Aug 5, 1999
Messages
6,548
Reaction score
167
Points
9,110
Location
Corpus Christi, TX
Real Name
Wayne
As mentioned, phase effects from the crossover can affect the sub’s response. Further complicating things, because of differences in distance from the sub, the effects of phase will get a different response reading from each speaker.

What I did was take my readings with just the front L/R and subs. This way I get the most accurate response for music, which is where accuracy counts the most. For movies, where the sub mostly reproduces booms from explosions, accuracy is less important. However, I’ve been very happy with the results I get with movies when setting the sub for best response with the L/R speakers

Regards,
Wayne A. Pflughaupt
 

al lout

Stunt Coordinator
Joined
May 6, 2004
Messages
164
Reaction score
0
Points
0
Thanks everyone for helping me out...

I'll order BFD in about 2 weeks, and will re-measure my sub freq response... Anything else I need to know/do once I got BFD? I don't wanna ruin the sub and the BFD...
I will most likely post some more questions when I got the BFD... Thanks once again...

Al,
 

Paul Stanley

Stunt Coordinator
Joined
May 1, 2004
Messages
98
Reaction score
0
Points
0
How about the connections? I can never wrap my head around how they go. The BFD only has those big microphone/headphone plugs on the back, nothing for the RCA. Do you need one RCA cord with an adapter from the LFE into the BFD, then another RCA with adapter from the BFD to the sub? Are these the only connections needed?

Thanks fellers.

 

PaulT

Supporting Actor
Joined
Oct 28, 2002
Messages
932
Reaction score
0
Points
0


Go to Radio Shack and get two 1/4" MONO jack to Female RCA adapters. You can use whatever you normally use for Sub cable to plug in and out of the BFD.

GOLD-PLATED PHONO JACK TO 6.35MM (1/4") MONO PHONE PLUG 274-884 $5.99CDN
- same number in the USA, 3.99USD
 

Allen Ross

Supporting Actor
Joined
Sep 30, 2002
Messages
819
Reaction score
0
Points
0
Or get them at PE, part # 091-1010 for 1.80. You know when you make your biweekly order from PE, what you don't order from PE every other week? Oh man, I asked the sales rep, and they said it was normal for people to order that often. Do I have a problem?
 

Wayne A. Pflughaupt

Moderator
Moderator
Joined
Aug 5, 1999
Messages
6,548
Reaction score
167
Points
9,110
Location
Corpus Christi, TX
Real Name
Wayne
If you’re like me and don’t care for adapters, you can use a pair of these part #42-2373 cables with a 1 /4” jack on one end and an RCA on the other,





They’re pretty pricey, though - $4.00 each.

An even better option would be to go to a guitar shop that sells PA equipment. You could probably find a pair of the same cables for the price on one of those from the Shack.

Regards,
Wayne A. Pflughaupt
 

Forum Sponsors

Forum statistics

Threads
343,667
Messages
4,686,395
Members
140,984
Latest member
Parsimony