Hi, Just wondering if anyone has any experience here?
I have a set of JBL L20T3 speakers which I use as monitors that were sold to the HiFi market, but based on one of their studio designs, the 4406.
The difference between the two is that mine have the bass port mounted on the rear, and they share a different cross-over, mine ommitting the L-pad which provides treble level control. Otherwise, the cab volume, drivers, etc. are identical.
It was suggested that I try the studio version's crossover with my speakers to see the difference, but I wanted to clarify the technical differences first. Essentially, it's the same crossover with different component values, and the studio version (4406) only uses film caps:
http://manuals.harman.com/JBL/HOM/Technical%20Sheet/L20t3%20ts.pdf
http://www.jblproservice.com/pdf/Studio%20Monitor%20Series/4406.pdf
Anyway, I decided I'd try and plot the responses in Spice, and the following two images show the results. I left the L-pad in the 4066 cross-over at full (8 Ohms):
L20T3: http://img220.imageshack.us/my.php?image=spicel20t3.png
4406: http://img220.imageshack.us/my.php?image=spice4406.png
The main differences I can see are, the L20T3 has a lower cross-over frequency of ~2KHz compared to ~3KHz, and the treble response in the linear region is around -6dB as opposed to -5dB for the 4066.
I don't have the luxury of an anechoic chamber, so I guess my question is, do you reckon this is worth giving a go? Comparing will be tricky with only one speaker at a time.
I have a set of JBL L20T3 speakers which I use as monitors that were sold to the HiFi market, but based on one of their studio designs, the 4406.
The difference between the two is that mine have the bass port mounted on the rear, and they share a different cross-over, mine ommitting the L-pad which provides treble level control. Otherwise, the cab volume, drivers, etc. are identical.
It was suggested that I try the studio version's crossover with my speakers to see the difference, but I wanted to clarify the technical differences first. Essentially, it's the same crossover with different component values, and the studio version (4406) only uses film caps:
http://manuals.harman.com/JBL/HOM/Technical%20Sheet/L20t3%20ts.pdf
http://www.jblproservice.com/pdf/Studio%20Monitor%20Series/4406.pdf
Anyway, I decided I'd try and plot the responses in Spice, and the following two images show the results. I left the L-pad in the 4066 cross-over at full (8 Ohms):
L20T3: http://img220.imageshack.us/my.php?image=spicel20t3.png
4406: http://img220.imageshack.us/my.php?image=spice4406.png
The main differences I can see are, the L20T3 has a lower cross-over frequency of ~2KHz compared to ~3KHz, and the treble response in the linear region is around -6dB as opposed to -5dB for the 4066.
I don't have the luxury of an anechoic chamber, so I guess my question is, do you reckon this is worth giving a go? Comparing will be tricky with only one speaker at a time.
