any electric bass players? im building a bass guitar cab

Status
Not open for further replies.
Jump to Latest
K

KOA

Member
Joined 2006
#1
im buildar a bass guitar cab for my friend who currently has an ampeg BXT-115HL4. would it be benefical to have a full range( up to 9k) type bass guitar cab using a phl 5200 15inch woofer and selenium 1 inch compression driver? vs his current cab which i think has an eminance omega pro-15a 15inch woofer and some little eliptical or exponential flare horn tweeter crossed in at 6k. so i have a couple compression drivers and a couple horns in mind. one compression driver is good from 500hz to 9k and the other is good from 2k to 20kand i wanted to know what you guys think of any combination of these horns and compression drivers. i already have the phl on the way. links:

phl woofer
http://www.phlaudio.com/datasheets/38_pdf/5050_5200.pdf

option one selenium phenolic compression driver
http://www.partsexpress.com/pdf/264-202.pdf

option 2 selenium titanium compression driver
http://www.partsexpress.com/pdf/264-235.pdf

option one horn
http://www.partsexpress.com/pe/pshowdetl.cfm?&PartNumber=270-099&DID=7

option two horn
http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=270-302

any advice, suggestions, or questions welcome.

thanks
koa
 
#5
thanks for the suggestions. i definitely will put on a switch for the tweeter. gotta think about horn loading the woofer. i guess the switch would turn off the tweeter and bypass the lowpass on the woofer. i haven't decided whether im going to lowpass the woofer or run it full range and use a higher shallower crossover on the tweeter. that would make the switching slightly easier. most likely going with a bass reflex just for cosmetics and ease of construction. the two 15 box looked cool but a harder to transport. the portability was of moderate to high concern thus the single 15.
 
#6
do you guys think i should go with the phenolic compression driver and keep the dispersion wide on the woofer but lose above 9k or should i go with the titanium compression driver and compromise dispersion on the woofer using it up to 1.5-2k and the tweeter from 2k up to 20k?
 
#7
KOA said:
thanks for the suggestions. i definitely will put on a switch for the tweeter. gotta think about horn loading the woofer. i guess the switch would turn off the tweeter and bypass the lowpass on the woofer. i haven't decided whether im going to lowpass the woofer or run it full range and use a higher shallower crossover on the tweeter. that would make the switching slightly easier. most likely going with a bass reflex just for cosmetics and ease of construction. the two 15 box looked cool but a harder to transport. the portability was of moderate to high concern thus the single 15.
Click to expand...

You wouldn't normally bother low-passing to the bass unit, just a high-pass to the tweeter - so it only needs a simple single pole switch.

It's rare to have horn loading on a bass guitar cab, they are usually just reflex - size and weight are usually pretty important!.
 
#9
KOA said:
yeah i just got the driver today so we are going to take it down to genesis advanced technologies and get it tested so we can make the appropriate crossover.
Click to expand...

You don't think you're over complicating this?, it's NOT a HiFi speaker, it's for a musical instrument - you're not looking to get a flat frequency response - chuck it in a box and play a bass through it and see how it sounds!.
 
#11
Personally, I wouldn't use a compression driver. I'd use soft domes. Those compression drivers will be way overkill @ 107db sensitivity.

I'd probably forget the tweeter alltogether, and use a 6" mid in a standard 2-way configuration. Chances are you can get a decent mid up to 5 or 6khz, which should be sufficient.

If I had to use a tweet, I'd look at a Morel MDT37 (madisound) or something like that. Maybe two Audax TW025's.

And if you use a tweet, put in a L-pad with an on/off switch.

I'd probably go with a Kappalite 3015LF also. But I see you've already bought your woofer.

P.
 
#12
pneuma said:
I'd probably forget the tweeter alltogether, and use a 6" mid in a standard 2-way configuration. Chances are you can get a decent mid up to 5 or 6khz, which should be sufficient.
P.
Click to expand...

I'm helping a friend with a bass cab and amp and that's the route we're taking. No point in anything about about 9Khz, and the 6" should cross over better to a 15". We'll probably have to use two 6" mids to match the sensitivity of a single 15 though.
 
#13
Fenris said:


I'm helping a friend with a bass cab and amp and that's the route we're taking. No point in anything about about 9Khz, and the 6" should cross over better to a 15". We'll probably have to use two 6" mids to match the sensitivity of a single 15 though.
Click to expand...


The Eminence LA6-CBMR is ~ 98dB, takes 150w RMS, and is sealed/closed back. You don't have to make a separate cab for it. Weighs about 7lbs. Should be good to ~ 5khz.

P.
 
#16
Hi,

You need a crossover followed by an L-pad.

Not at 800Hz, I'd go higher, a question of blending with the bass driver.

An externally hosted image should be here but it was not working when we last tested it.


http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=260-268

Note you rotate the L-pad so 0 is your "normal" level.

I would use a 16 ohm L-pad ( do not worry about the mismatch)

http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=260-254

There are other ways of doing it :

Capacitor followed by L-pad followed by 2nd order LC filter then driver.

Is probably the best way, 2nd order at say 1.4kHz, vary input capacitor to suit.

🙂/sreten.

P..S. if you go for it, get one of these now : http://www.partsexpress.com/pe/showdetl.cfm?Partnumber=280-051
 
Status
Not open for further replies.
Top Bottom