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Q & A / Re: Sunn Horn Array Speaker?
« Last post by EdBass on July 31, 2020, 07:12:39 am »
I'm pretty sure those are from a late 60's Sunn Coliseum PA system. If so, the 215 cabs were loaded with JBL D130's and the drivers behind those radiators were probably JBL 375's.

Sometimes referred to as a "Beach Boys" PA because the Beach Boys used the first ones in the mid 60's.
Pretty rare stuff. Not many of those made, no frame of reference really so it would be hard to even guess at their value.
Fairly useless as far as live sound in today's world, the only interest might be from a collector, or more probably a vintage hi-fi person interested in lust the drivers themselves.
If you still have the 215 cabs, those D130' are worth something if you find the right person; as with the horns, vintage hi-fi folks, however if they are solid there might be some interest among guitar players.
If you want to sell them, put them on eBay. You'll certainly find out what they are worth that way.

If it is indeed a 60's Sunn Coliseum PA system, and you happen to ALSO have the amplifier that was used to power that system, that's another thing altogether. Those bring pretty strong money from the musician world.

Q & A / Sunn Horn Array Speaker?
« Last post by Devilman1214 on July 31, 2020, 05:17:48 am »
Hi! I recently inherited some Sunn equipment and am not a musician. I've found info on the 2x15 cabinets but have been unable to find anything on this speaker. Someone told me it's an array or horn speaker? They were attached to the top of the 2x15 bass cabinets that I received. If possible, I'd like to know what they are and approximate value. I'll probably be selling them since I have no use for them. Thank you for any help you can provide.
Q & A / Re: Sunn 12" SPL-91212 Pro Series
« Last post by bigobassman on July 30, 2020, 11:03:52 pm »
Thanks guys.  Ever since I posted this thread back in March, I could never hit reply for the thread and it work.  Wasn't ignoring anyone, just some glitch that I've never had before.  Periodically, I would try reply for this thread and until tonight, it never would work properly for me.  Oh well!   :-)
Q & A / MOVED: Repairing Sunn Tube Amps
« Last post by EdBass on July 28, 2020, 06:22:12 am »
DIY / Repairing Sunn Tube Amps
« Last post by patlaw on July 27, 2020, 08:27:25 pm »
Restoring my own Sentura II was a great experience. This will sound strange, but if anyone has a Sentura II or similar tube head that you want restored, I'll do the labor for free. Just pay for parts and shipping. Warning. I'm slow, but I'm true to form. If I can get the original part, I will.

Here is the thread on my own restoration, which went perfectly. I'm in North Carolina. Send me a private message. References available.
Q & A / Re: Sunn Solarus Tube Functions
« Last post by DoomSunn on July 26, 2020, 10:25:20 pm »
Thanks Greg and Ed for all the info. Appreciate it :))))
Q & A / Re: Sunn Solarus Tube Functions
« Last post by Soundmasterg on July 26, 2020, 08:41:23 pm »

I have a Sunn Solarus with El34s

Im trying to figure out what each of the tubes do. Anyone know?

12ax7 - pre amp?
12au7 - reverb
El 34 x2 ?
7199 ? Phase inversion ? Does it have any effect on the sound?

To elaborate a little more on what Ed said;

The EL34 are the output tubes. They work in conjunction with your output transformer to provide the power.
The GZ34 converts AC to DC inside the amp and because it has internal resistance, it introduces some sag and delay in it's ability to do this in comparison to a solid state diode. Unless you playing very loudly you won't notice this effect however.
7199 is the driver tube and the phase inverter tube all in one. The driver portion is the pentode half of the tube and this gives more voltage to drive the phase inverter section (a triode) and the power tubes to their full power.
12AX7 is your preamp sections
12AU7 is the reverb driver.

Most of the Sunn amps are quite simple and are largely based on Dynaco hi-fi amps of the era. They use large transformers and high voltage to get more power and better overall frequency response in comparison to many other amps of the era such as Fenders.

Q & A / Re: Sunn Solarus Tube Functions
« Last post by EdBass on July 26, 2020, 02:25:07 pm »
I think you've got it for the most part. The 7199 is indeed the driver, and I think it's critical tone component, and pretty much the heart of an integrated amp.
The EL34s are the output tubes, and the GZ34 is the rectifier.
Q & A / Re: Kyuss Bass Tones from a Sunn?
« Last post by EdBass on July 26, 2020, 02:16:40 pm »
Those are all Sunn tube amp emulations, if you wanted to emulate a Coliseum Bass amp you would likely have to start with its transistor preamp. I don't have much transistor amp experience, but it's my understanding that those Hartzell era transistor preamps are relatively difficult to reproduce because of multiple odd voltage requirements, and the components and inefficiencies of the era as opposed to modern circuit designs.
Regardless, in ALL cases the preamp alone is <= half of the tone.
That "smooth fuzz" is probably the sum total of the instrument, the integrated amps, and whatever other hardware (speakers, microphone, DI, recording console etc.) is between the bassists hands and your ear.

Depending on your personal interpretation, the term"smooth fuzz" would be in most cases a milder, thicker, non abrasive distortion which would more likely be output stage saturation, or an outboard effect rather than preamp distortion.
Q & A / Sunn Solarus Tube Functions
« Last post by DoomSunn on July 24, 2020, 07:55:07 pm »

I have a Sunn Solarus with El34s

Im trying to figure out what each of the tubes do. Anyone know?

12ax7 - pre amp?
12au7 - reverb
El 34 x2 ?
7199 ? Phase inversion ? Does it have any effect on the sound?
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