Hoffman's Law == pick two:
-deep bass
-high efficiency
-small size
To get deep bass in a modest size box requires selecting a large cone area woofer with low efficiency, plus a BIG amp.
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With 97db/w and Fs=40Hz the JBL 2226H is a midbass and not a woofer. In a ported box -3db ~60Hz before room gain.
The JBL 2235H has 93.3db/w efficiency with Fs=20Hz, and therefore deeper bass than the JBL 2226.
The GPA 515LF has 97.5db/w efficiency with a low Fs=28Hz (high 11.6 Qms helps) which models well in an extended bass shelf alignment.
Putting a bass-shelf GPA 515LF near walls typically generates both deep bass and flat SPL.
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THIELE/SMALL PARAMETERS: JBL 2226H
fs: 40 Hz
Re: 5.0 ohms (H) 10.0 ohms (J)
Qts: 0.31
Qms: 5.0
Qes: 0.33
Vas: 175 l (6.2 ft3)
Sd: 0.088 m2 (137 in2)
Xmax: 7.6 mm (0.30 in)
Vd: 689 cm3 (41 in3)
Le: 1.75 mH (H) 3.5 mH (J)
-deep bass
-high efficiency
-small size
To get deep bass in a modest size box requires selecting a large cone area woofer with low efficiency, plus a BIG amp.
============
With 97db/w and Fs=40Hz the JBL 2226H is a midbass and not a woofer. In a ported box -3db ~60Hz before room gain.
The JBL 2235H has 93.3db/w efficiency with Fs=20Hz, and therefore deeper bass than the JBL 2226.
The GPA 515LF has 97.5db/w efficiency with a low Fs=28Hz (high 11.6 Qms helps) which models well in an extended bass shelf alignment.
Putting a bass-shelf GPA 515LF near walls typically generates both deep bass and flat SPL.
============
THIELE/SMALL PARAMETERS: JBL 2226H
fs: 40 Hz
Re: 5.0 ohms (H) 10.0 ohms (J)
Qts: 0.31
Qms: 5.0
Qes: 0.33
Vas: 175 l (6.2 ft3)
Sd: 0.088 m2 (137 in2)
Xmax: 7.6 mm (0.30 in)
Vd: 689 cm3 (41 in3)
Le: 1.75 mH (H) 3.5 mH (J)
Point taken. I'll definitely get more bass from the JBL 2235H or the GPA 515. i will keep this in mind and welcome an upgrade in the future. This purchase was a suitable option at this time plus I have a SVS SB2000 I can incorporate into the system to pickup where the 2226H rolls off.
Or use the super low Fs 411 for best overall tonal blend as I did now that GPA is reproducing them.
GM
GM
6041 used a 416-8B and later 8C: http://audio-heritage.jp/ALTEC/speaker/6041(3).jpg
Yes, my current speakers have matched dual 515Bs, but the A7-500s I converted to having a 'sub' in the bottom XO'd at 120 Hz was the original 411 whereas the ones done by others decades later all used the JBL 2245H IIRC per my suggestion. The 2226 is a mid-bass horn driver, so if used in an A7 it would be for the horn.
GM
Yes, my current speakers have matched dual 515Bs, but the A7-500s I converted to having a 'sub' in the bottom XO'd at 120 Hz was the original 411 whereas the ones done by others decades later all used the JBL 2245H IIRC per my suggestion. The 2226 is a mid-bass horn driver, so if used in an A7 it would be for the horn.
GM
I checked the GPA site and it's not showing a 411 woofer. Does it have a different model No. maybe part of the 3000 series?
Anyone know the dimensions of the Altec 6041 cabinet? I cannot find related literature in English. The lower cabinet looks small for the 416 woofer.
Anthony
Anyone know the dimensions of the Altec 6041 cabinet? I cannot find related literature in English. The lower cabinet looks small for the 416 woofer.
Anthony
For whatever reason, the GPA site is apparently woefully out of date; I learn about 'new' products when folks post about buying them.
I have the basic build specs for several of the Japan spec models, but as locked up in a damaged HD and memory is kinda gone these days.
It's a T/S max power handling alignment, so no consideration for additional series resistance. Basically, vent a small sealed alignment to keep efficiency high and use EQ to shape its in room as desired.
GM
I have the basic build specs for several of the Japan spec models, but as locked up in a damaged HD and memory is kinda gone these days.
It's a T/S max power handling alignment, so no consideration for additional series resistance. Basically, vent a small sealed alignment to keep efficiency high and use EQ to shape its in room as desired.
GM
(Anthony), " I use a Marchand XM9 crossover it has LR high and Low outputs. Presently I use a crossover point of 350 Hz to the low LR channel power amp and the High LR power amp gets signals above 350Hz into the 604 passive crossover that has a 1500Hz xover point."
(GONE) First plan: the JBL 2235H in a 5cuft ported box tuned to 33Hz would be a very good match. With the Marchand set for LR4/LR4 around 160Hz(attempt to cover baffle step & crossover) use room placement to help smooth bass.
(PURCHASED) Second short term JBL 2226H plan: With the Marchand set for LR4/LR4 around 160Hz(attempt to cover baffle step & crossover) between the sealed 604-8H, and ported 4507 cabs with 2226H woofers where the bass will be limited to ~60Hz before near-wall room gain is used for modest irregular extension.
(FAMILY VALUES) Some believe that Altec cones/motors/construction creates a unique sound and favor using an Altec 416 or 515 woofer with the Altec 604-8H. Altec designed the GPA 515LF with a rear vented magnetic assembly to improve large Xmax bass reflex performance. The GPA 515LF models well in a 8cuft 30Hz bass-shelf alignment where bass gain from proper near-wall room placement is used to generate near-flat bass SPL.
(KLUDGE) XM9 experiment: If you have basic soldering iron + opamp skills, you can patch in a Linkwitz Transform bass boost on a small PCB into your Marchand XM9 cabinet. With enough amplifier power, the 600W max spec 2226H woofer in a 5cuft SEALED box can get pushed down below 30Hz. Might as well patch in a quad opamp for some future equalizer (time align?) experiments.
IF you enjoy the sound of the SEALED 2226H bass, having a Linkwitz Transform circuit in your XM9 will allow your to use a wider range of 15" and 18" woofers with better T/S specs which use less boost-watts to get powerful deep bass from sealed 5cuft.
(GONE) First plan: the JBL 2235H in a 5cuft ported box tuned to 33Hz would be a very good match. With the Marchand set for LR4/LR4 around 160Hz(attempt to cover baffle step & crossover) use room placement to help smooth bass.
(PURCHASED) Second short term JBL 2226H plan: With the Marchand set for LR4/LR4 around 160Hz(attempt to cover baffle step & crossover) between the sealed 604-8H, and ported 4507 cabs with 2226H woofers where the bass will be limited to ~60Hz before near-wall room gain is used for modest irregular extension.
(FAMILY VALUES) Some believe that Altec cones/motors/construction creates a unique sound and favor using an Altec 416 or 515 woofer with the Altec 604-8H. Altec designed the GPA 515LF with a rear vented magnetic assembly to improve large Xmax bass reflex performance. The GPA 515LF models well in a 8cuft 30Hz bass-shelf alignment where bass gain from proper near-wall room placement is used to generate near-flat bass SPL.
(KLUDGE) XM9 experiment: If you have basic soldering iron + opamp skills, you can patch in a Linkwitz Transform bass boost on a small PCB into your Marchand XM9 cabinet. With enough amplifier power, the 600W max spec 2226H woofer in a 5cuft SEALED box can get pushed down below 30Hz. Might as well patch in a quad opamp for some future equalizer (time align?) experiments.
IF you enjoy the sound of the SEALED 2226H bass, having a Linkwitz Transform circuit in your XM9 will allow your to use a wider range of 15" and 18" woofers with better T/S specs which use less boost-watts to get powerful deep bass from sealed 5cuft.
Hi, I assume you are still in the process of building this cab and wonder whether you decided on internal bracing? Thank you, Sri
Hi all -
I wanted to get some thoughts on the use of the Tannoy Westminster cabinet to house 604-8h driver. There is someone on ebay selling Westminster knockoffs and using 604-c driver with them. He says they sound great and provide the deeper bass versus ? I would think that the side walls of the front horn of the Westminster cabinets, even though angled, would interfere with the dispersion of the sound from the mantaray horn. Here is the link on ebay for these cabinets.
Altec 604 Tannoy Western Electronic Vintage Speaker Cabinet Pair / for 15 Inch | eBay
Please comment if you will. Thank you.
I wanted to get some thoughts on the use of the Tannoy Westminster cabinet to house 604-8h driver. There is someone on ebay selling Westminster knockoffs and using 604-c driver with them. He says they sound great and provide the deeper bass versus ? I would think that the side walls of the front horn of the Westminster cabinets, even though angled, would interfere with the dispersion of the sound from the mantaray horn. Here is the link on ebay for these cabinets.
Altec 604 Tannoy Western Electronic Vintage Speaker Cabinet Pair / for 15 Inch | eBay
Please comment if you will. Thank you.
These have been the best sounding cabs I have owned for the 604 series. The wide front baffle sounded better than the Stonehenge or other styles.
😀 Right, it takes a min. 30" to cover a typical baffle step loss, so prefer even wider whereas the Altec cabs were designed to both minimize width to please the marketing dept., yet wide enough to add a 'bump' in the mid-bass.
Greets!
Missed this...........did you have any luck, pursue this? The link is long gone now.
Wood products are double/triple the price these day.
However if you need large size panels or cabinets, I just dialed in my Powermatic 511.
Product supplier:
Exotic Lumber |
Would need plans or detailed sketches.
3/4" BB 5'x5' is $88, that's not bad.
Doug
However if you need large size panels or cabinets, I just dialed in my Powermatic 511.
Product supplier:
Exotic Lumber |
Would need plans or detailed sketches.
3/4" BB 5'x5' is $88, that's not bad.
Doug
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Well every now and then one can get get a break.
By some stroke of luck I found that on Craigs, like new condition.
It was in a tech school that went under, it was only used a few times.
By some stroke of luck I found that on Craigs, like new condition.
It was in a tech school that went under, it was only used a few times.