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description: Audio advice and discussions with audiophiles and professionals. Free discussion forums, open to all and frequented by industry experts. Ask questions and get advice on stereos, speakers, hi-end amplifiers, pre-amps, home theater, tube hi-fi, turntables, vinyl, tweaks, music, films, video, DVDs and more.
items: Compensation components w/ 6db slopes?
items: Re: Compensation components w/ 6db slopes?
items: Thanks! (nt)

Compensation components w/ 6db slopes?
type: item
description: Hi, Wayne! Your crossover papers have been really informative. I'd like to use 6db slopes in my crossover design, but I also want high-freq compensation for the HF compression driver -- if I want 35 ohms additional resistance for the horn driver (on a JBL 2380 clone), do I simply parallel this with a .47uf cap and then calculate the crossover cap size based on the total resistance (8 ohms for the driver + 35 ohms?). Do I need to use a tradional L-pad for the best response? Thanks!
creator: Kramer
date: 2001-10-08T20:31:37-00:00

Re: Compensation components w/ 6db slopes?
type: item
description: I would not recommend a variable L-Pad, but would recommend a series/parallel attenuator using fixed value resistors. Put an HF augmentation capacitor across the series resistor. The network I use in my speakers will work for you, using values R1=16 ohms, R2=30 ohms and C1=0.47uF. It is a little different configuration than usual, with the shunt resistor in front of the series resistor, because it was designed to provide a specific amount of damping for my crossover. But it will work for you very nicely. Load impedance is about 12 ohms, so keep that in mind when choosing your crossover cap.
creator: Wayne Parham
date: 2001-10-09T01:32:21-00:00

Thanks! (nt)
type: item
creator: Kramer
date: 2001-10-09T19:26:57-00:00