6.5" dual driver

ThSpeakerDude88 · 13th June 2006, 10:56 PM

hey.. just picked up an RCA sub at goodwill. Lots of port chuffing! Doesn't go very low, but is rated at 200 watts and has two nice 6.5 inch 100 watt 6 ohm woofers that I salvaged from it.

Any way to design an improved decent little sub out of these?

I don't have much info about them other than they say 50-100 watt on them ( 50 rms, 100 max probably), they say E A H on the backs of the drivers, the sattelite woofers say the same thing.

Whats the lowest usable responce I could get out of a dual 6.5" driver sub?

gmarceau · 14th June 2006, 07:28 AM

I went down to 45hz

first sub -- cheap style

ThSpeakerDude88 · 16th June 2006, 03:32 AM

so how about opposing drivers in a small sealed box, sunfire style? Might like to make a sweet portable 2.1 system out of this.

ThSpeakerDude88 · 19th June 2006, 11:54 PM

what size box should I go with if their going to be opposing sealed? smallest possible?

AndrewT · 26th June 2006, 07:00 PM

Hi,
the lowest useable output depends very much on the T/S parameters.

But as a guide to what can be achieved if they have been optimised for bass extension.

My tiny Acoustic Energy AE1s have a 5inch driver with a 90mm cone serving as mid bass. They go down very deep when the amps preceding it have wideband characteristic.
Of course my down side is lack of loud grunt, but for most TV/DVD soundtracks they are surprisingly capable.

A pair of 6.5inch drivers could, with careful set up, be very satisfying.

The gain in size reduction from isobaric loading for a 6.5inch driver does not seem attractive to me.

ThSpeakerDude88 · 26th June 2006, 11:17 PM

Is opposing isobaric? I'm talking like the sunfire subs and klipsch promedia style subs.

Actually, The klipsch we have uses 6.5 inch or 7 inch woofers and its 170 watts. Its not the best sub in the world but its ok.

ocool_15 · 29th June 2006, 06:16 AM

I did a similar project with 2 6.5" I did a ported box and in house tuned to 31Hz(measured higher)

~1cuft after port displacement
Port was about 11.5" long 3.5"x1.25" and I used some stuffing. Those numbers might not match up exactly but they are approximate.

I found it to be quite good(for the $4.50 invested) but did require some equalization above the tuning frequency. My 6.5"'s had a Fs of about 60Hz and were likely OAM car speakers. I never did a full set of measurements on the drivers.

Isobaric allows a box of ~1/2 the size but with only the displacement of a single speaker.

13th June 2006, 10:56 PM	#1
ThSpeakerDude88 diyAudio Member Join Date: Jun 2005 Location: USA	6.5" dual driver hey.. just picked up an RCA sub at goodwill. Lots of port chuffing! Doesn't go very low, but is rated at 200 watts and has two nice 6.5 inch 100 watt 6 ohm woofers that I salvaged from it. Any way to design an improved decent little sub out of these? I don't have much info about them other than they say 50-100 watt on them ( 50 rms, 100 max probably), they say E A H on the backs of the drivers, the sattelite woofers say the same thing. Whats the lowest usable responce I could get out of a dual 6.5" driver sub?

26th June 2006, 07:00 PM	#5
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, the lowest useable output depends very much on the T/S parameters. But as a guide to what can be achieved if they have been optimised for bass extension. My tiny Acoustic Energy AE1s have a 5inch driver with a 90mm cone serving as mid bass. They go down very deep when the amps preceding it have wideband characteristic. Of course my down side is lack of loud grunt, but for most TV/DVD soundtracks they are surprisingly capable. A pair of 6.5inch drivers could, with careful set up, be very satisfying. The gain in size reduction from isobaric loading for a 6.5inch driver does not seem attractive to me. __________________ regards Andrew T.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
GE "Dual Speaker" radio to Harmony H303 conversion : Help, please?	Spasticteapot	Tubes / Valves	16	12th July 2007 09:00 PM
dual or single driver sub	jaya000	Car Audio	22	5th January 2007 06:59 PM
Dual Driver Subs?	bluegti	Subwoofers	17	9th October 2006 06:03 PM
Dual driver system	Michael Speaker	Multi-Way	8	12th October 2005 07:28 AM
WTB dual "modular" pots from Clarostat, Bourns ETC	mihow	Parts	0	15th September 2005 06:40 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

14th June 2006, 07:28 AM	#2
gmarceau diyAudio Member Join Date: Jun 2006	I went down to 45hz first sub -- cheap style

16th June 2006, 03:32 AM	#3
ThSpeakerDude88 diyAudio Member Join Date: Jun 2005 Location: USA	so how about opposing drivers in a small sealed box, sunfire style? Might like to make a sweet portable 2.1 system out of this.

19th June 2006, 11:54 PM	#4
ThSpeakerDude88 diyAudio Member Join Date: Jun 2005 Location: USA	what size box should I go with if their going to be opposing sealed? smallest possible?

26th June 2006, 11:17 PM	#6
ThSpeakerDude88 diyAudio Member Join Date: Jun 2005 Location: USA	Is opposing isobaric? I'm talking like the sunfire subs and klipsch promedia style subs. Actually, The klipsch we have uses 6.5 inch or 7 inch woofers and its 170 watts. Its not the best sub in the world but its ok.

29th June 2006, 06:16 AM	#7
ocool_15 diyAudio Member Join Date: Nov 2004 Location: sk	I did a similar project with 2 6.5" I did a ported box and in house tuned to 31Hz(measured higher) ~1cuft after port displacement Port was about 11.5" long 3.5"x1.25" and I used some stuffing. Those numbers might not match up exactly but they are approximate. I found it to be quite good(for the $4.50 invested) but did require some equalization above the tuning frequency. My 6.5"'s had a Fs of about 60Hz and were likely OAM car speakers. I never did a full set of measurements on the drivers. Isobaric allows a box of ~1/2 the size but with only the displacement of a single speaker.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)