Hello,
I think your 605a with red surrounds are reconed. Maybe they have a new HF diaphragm as well? I have 3 605a and one was reconed long ago with the same red surround.
Tom
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Hello,
I think your 605a with red surrounds are reconed. Maybe they have a new HF diaphragm as well? I have 3 605a and one was reconed long ago with the same red surround.
Tom
Hello,
Have you seen this? It might be just what you want.
http://www.audioheritage.org/html/perspectives/drews-clues/system.htm
Hello Steve,
I recall from this forum that the 2251j-1 adds aquaplas and a mass ring, maybe 10 grams for the aquaplas and 10 more for the mass ring.
Best Regards,
Tom
Hello,
I suggest you use Altec Duplex like 604 or 605 series.
Tom
Hello,
I think I used HP339 in 1982. I think it has the source oscillator as well as the notch filter/voltmeter. is that correct? I think the HP lab equipment is very nice to use and well built....
Hello,
There are many cabinets for Altec 604.The one you show looks like Altec cabinet 620. There is also a cabinet by billfort shown on wardsweb.org which is inspired by the 620 cabinet except it...
Hello,
Here are some other software tools:
http://www.pvconsultants.com/audio/frdgroup.htm
Tom
Hello,
Be aware that the oasr has a 7/8 inch throat while the bms 4540 has a 1 inch throat. Be sure your driver has a 7/8 throat, I wish I did before I bought the oasr. Perhaps the 2407 throat...
Hello,
The 2407 looks very much like the bms4540nd. The DDS eng1-90 horn works well with it if you want a 90 degree round horn.
Tom
Hello,
I recommend the BMS 4540nd and DDS ENG 1-90 Pro horn.
The bms costs a bit less than the B&C mentioned above.
http://www.bmspro.com/downloads/
I think you can also buy the jbl 2407h...
Hello,
Perhaps your problem is related to amplifier output impedance. The vintage Altec designs were suited to vintage amplifiers which in general had output impedance of some ohms (not zero). You...
Hello,
There are cases where the DCR of the series inductor can be used to your advantage. It effectively raises the Qes of the driver thereby changing the low frequency rolloff. Here is the...
Hello,
The 604 can be used in many different enclosures that can be found on the internet. Remember to include your amplifier output impedance when you calculate the tuning frequency. Most speaker...
Hello,
Here is another Altec cabinet to consider. I think it will fit into a home better than the A5/A7 series and the dual woofer will increase efficency to better suit your low power amp.
...
Hello,
I think the 2226 is generally used as a direct radiator, not in a horn. The JBL 4648A is an example.
The cabinets for a dual 15 plus a horn are generally old. Here are some links to an...
Hello,
I found the following book helpful. The author includes some theory as well as practical information from his projects.
http://www.gedlee.com/Home_theatre.htm
I hope you enjoy your...
Hello,
Did you ever fix your 605s? If not, I suggest the following plan:
1) switch crossovers from one driver to the other to see if problem is driver or crossover.
2) If it is the crossover...
Hello,
Here is a good place to go for IB:
http://f20.parsimony.net/forum36475/
In general IB is all about Xmax so you will want multiple drivers.
IB is when the enclosed volume is more...
Hello,
The rectangular PT horn (100 x 100) has arrived. It is 304 (w) x 164 (h) mouth x 74 (d) with a 38mm throat. Unfortunately I am quite busy and may not test it until after the first of the...
Hello,
Here are the links to the horns:
1) horn parts list
http://www.jblproservice.com/pdf/Horn%20List/04%20Horn%20Parts%20List%20.pdf
2) PT waveguide document.
...
Hello,
Yesterday I ordered two JBL horns that were not previously available (to me anyway): 126-00013-00 which is 100x100 OASR for 1 inch driver and 338786-001 (pt-f1010hf ) which is 100x100...
Hello,
The 8024 full scale input is +22dBu while the deq2496 has switchable input levels of +12 or +22. So with home gear the 8024 is losing 10dB of signal to noise ratio to the 2496.
The...
Hello,
If your budget will allow it I suggest the replacement for the 8024: DEQ2496. It has more processing power so you can go eq and rta at the same time (as well as have more filters) and it...
Hello Mr Yoder,
I'm a bit late in this thread but I'll answer your original question anyway. Audio power amps are generally considered as voltage sources - that is they will output a certain...
Hello,
Hawksford says that voice coil temperatures exceed 200 C.
http://www.essex.ac.uk/ese/research/audio_lab/malcolms_publications.html
see article J12
Regards,
Tom