NAD 2015 Bogner Helios 100 Quick Review

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Texhex

Texhex

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Posted this in a few other forums but thought I'd share here too.

This amp is absolutely fantastic, it really is something special.

The build quality is top notch, very high quality parts and it shows. Nothing loose, no sharp edges or uneven parts or tolex and this is a 2015.

Every dial is smooth and responsive, just the right amount of feel when turning them, not loose or too tight, just perfect. All of the EQ knobs have a wide sweep and change their individual frequencies substantially and the Bottom knob on the back can add a ton of low end but not muddy up the tone.

There is a tiny bit of transformer hum when it's on but there is no other noise and the hum is very minimal. With the gain and volume up high I don't get any noise from my speakers other than slight hiss from the volume and gain, and this is at very high volume. There are no other noises being generated. I read a review that said there were "radio noises" coming from the speakers when using a lot of gain and volume, maybe that dude had something else going on but this amp performs exactly like you would expect.

Chanel 2, hot input, 80s mode, B2 switch, EQ to taste with the gain at about 1:00 and it is a flat out screamer of an amp. Perfect 80s gain, tight and harmonic. No boost needed and nothing coloring the sound, just pure rich goodness with every riff.

The 70s mode can be just as gain heavy as 80s mode but with much less compression and much more open and raw. The amp does so well on it's own without a boost it's just plain out sick. The B2 switch adds so much to the gain stage but doesn't overdo it. It's like turning the gain all the way up but nice and smooth and with the flip of a switch it's all there.

These amps are so under the radar it's crazy. Maybe it's because of the switching names (80s, 70s, B1, B2, etc.) or the Input names (Hot and Plexi) but I can pull so much out of this thing and I've only played around on 80s and 70s modes and in the Hot input, so much more left to discover.

I also think that not being able to switch between the inputs may put some people off but I'm not gigging this and just playing in the studio I dial in my sound and let it rip and brother does it rip!

Just a high quality, beautiful hand wired, screaming beast of an amp from an artistic mastermind amp builder. Loving it.



70s Mode





High Gain Mix






Full Gallery Link




A few choice pics:

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Looks great, man. Congrats. It is always fun when you get an amp you gel with. I had a twin and thought it was among the best amps I have ever played, so I have respect for Bogner big time.
 
A work of fucking art right there! Congrats.
 
Congrats on your new baby. How much difference do you hear between the 70's and 80's mode? I don't trust the youtube clips I've heard.

I've been wanting to add one of these or the eclipse version for a while now but I hear so many mixed reviews of anything from Bogner these days. I finally got to play the 3534 and thought it was cool but it didn't wow me. Not a bad amp by any means but I didn't have to have it. A Helios or Shiva is definitely on my radar still though.
 
Nice clips! This amp has been on the top of my list. What volume did you play at?
 
Congrats on your new baby. How much difference do you hear between the 70's and 80's mode? I don't trust the youtube clips I've heard.

I've been wanting to add one of these or the eclipse version for a while now but I hear so many mixed reviews of anything from Bogner these days. I finally got to play the 3534 and thought it was cool but it didn't wow me. Not a bad amp by any means but I didn't have to have it. A Helios or Shiva is definitely on my radar still though.
70s mode is huge, less compressed, bolder and there is a big volume bump up from 80s to 70s.

Nice clips! This amp has been on the top of my list. What volume did you play at?
Same settings as the pictures. Apparently you can jumper the FX loop and run it as a global master but I haven't tried that. These were recorded though a Suhr reactive load w/ a Mesa oversized 4x12 V30 IR.
 
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Love these amps. One of my favorite amps ever. Had all three and still have the 100.
 
I had a Helios 50 for a while and loved it. Sold it during my merry-go-round / amp-of-the-month phase and in hindsight, it’s one I should have kept. I do think I would prefer the added ‘headroom’ of the 100. This thread makes me want to track down a 100 watt version.
 
I liked the 100's I had in the past. Both were noisy though, unfortunately. Loops had a lot of hum. It's been a while since I've had one but really good base tone.
 
I had a Helios 50 for a while and loved it. Sold it during my merry-go-round / amp-of-the-month phase and in hindsight, it’s one I should have kept. I do think I would prefer the added ‘headroom’ of the 100. This thread makes me want to track down a 100 watt version.
Me too. Had the 50 watt, and honestly one of the best sounding amps I ever owned. Especially after upgrading the tubes and warming up the bias.
 
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Does anyone have the preamp tube layout and bias point locations for the 100?
 
Does anyone have the preamp tube layout and bias point locations for the 100?

V1 hot input only
V2 plex input only
V3 Ch 2 cathode follower
V4 effects loop
V5 phase inverter

V5 is closest to the output tubes and then they run in order from there.


I'm guessing that resistor is part of what you attach probes to.

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V1 hot input only
V2 plex input only
V3 Ch 2 cathode follower
V4 effects loop
V5 phase inverter

V5 is closest to the output tubes and then they run in order from there.


I'm guessing that resistor is part of what you attach probes to.

View attachment 82478

Thanks man. Any idea what the spec/range for the bias is? I guess I can ask Bogner too on Monday.
 
Thanks man. Any idea what the spec/range for the bias is? I guess I can ask Bogner too on Monday.

My 2009 101B was 36-38mV, but I have no clue about the Helo.
Big Joe at Bogner's your man.
 
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Thanks man. Any idea what the spec/range for the bias is? I guess I can ask Bogner too on Monday.
Need to know the plate voltage, but if I recall, mine was a bit cold at 32mA. Again, if memory serves me, plate voltage was around 460-470. I biased it at 36mA with some JJ KT77's. Really added some chunk, and was an overall upgrade. The standard JJ EL34's aren't the greatest.
 
I have a Helios 100 I bought new in 2015.
It is my absolute favorite amp!
It does the 70's and 80's thing better then any other amp I have ever played.
Atleast to my ears ?
It does so much more very versatile accept the clean on the hot side is not very clean.
Kinda like a 1 channel amp.
That is the only draw back to me.
They are raw and gritty and sustain is killer !
Congrats on the amp !
Enjoy !
 
^ Sounds fucking bad ass :yes:


Reminds me of Killswitch Engage. HNBHD :cheers:
 
This makes me miss mine. It was my all time favorite that I gigged with in the hard rock cover band I was in from 2007 until last year. Cycled through many amps in those years, but that Helios was the cream of the crop.
 
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