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#1
Hey, i am going to be purchasing a new amp head and have been looking at the JCM 800 for an 80's tone. They dont look very impressive. could you tell me about its features and footpedals. I am also aware that there are different ones like the JCM 800 2210 and 2205 . What are the differences between these? and could you recommend a different amp for 80's glam metal/rock (e.g.Van Halen, Motley Crue, GNR, Steel Panther etc). Thank You!
#2
I'm a big fan of the Orange Thunderverbs for 80s rock.
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#3
The JCM 800 is the "Holy Grail" of heaviness, IMO.

It has a very simple looking preamp, but, in terms of sheer power, I don't think there are any other amps that can touch it.

Tom Warrior of HH/CF/Triptykon uses JCM 800s, and he has, IMO, the best metal rhythm tone I've ever heard. He boosts his w/ a TS, but that's it.
#4
What footpedals? 800s don't have a footswitch unless you get a 2205 or 2210.

Features: Power On/Off, Standby On/Off, Presesnce, Bass, Middle Treble, Master Volume, Preamp Volume, High input, Low input.

That's it.
Everyone is entitled to an opinion.

Feel free to express yours so I can make an informed judgement about how stupid you are.
#5
Don't think the jcm 800 sucks because it doesn't have many knob. It is amazing, it doesn't have to have many knobs, it is the ultimate in british crunch or 80s rock, the only con is that u don't have variety, but if 80s rock is what u play, don't settle for any less
Alex Hager - AlexHagerMusic
#6
Fyi, get the 2203 model, it a single channel but the quality is amazing, the other models loose quality by dividing the sound into channels
Alex Hager - AlexHagerMusic
#7
Quote by alexhagermusic
Fyi, get the 2203 model, it a single channel but the quality is amazing, the other models loose quality by dividing the sound into channels


That's not why people dislike them, it's because the distortion on the 2205/2210 has diodes which boost the gain. Lots of other amps use diode clipping to get distortion, so I don't see why this is an issue with these 800s.
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#8
Quote by Raijouta
That's not why people dislike them, it's because the distortion on the 2205/2210 has diodes which boost the gain. Lots of other amps use diode clipping to get distortion, so I don't see why this is an issue with these 800s.

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#9
IIRC it was mostly because the channels blend on some of the dual channel models or something.
#10
Quote by Raijouta
That's not why people dislike them, it's because the distortion on the 2205/2210 has diodes which boost the gain. Lots of other amps use diode clipping to get distortion, so I don't see why this is an issue with these 800s.

There's more circuit differences than that, that makes the dual channel versions sound "worse" to other people's ears.
They're actually fairly different amps, if you look at their preamp.
#11
Quote by Tedward
IIRC it was mostly because the channels blend on some of the dual channel models or something.

This. The channel switching is useless.
Everyone is entitled to an opinion.

Feel free to express yours so I can make an informed judgement about how stupid you are.
#13
We'll. There's other reasons people dislike other models, different tubes, the 87s jcm 800s came stock with the el34 tubes and drake capicitors, my fav.
Alex Hager - AlexHagerMusic
#14
^ Drake transformers, you mean.
Everyone is entitled to an opinion.

Feel free to express yours so I can make an informed judgement about how stupid you are.
#15
A lot of JCMs came with 6550s. And Drake doesn't make capacitors. They came with LCR electrolytics in the power supply, other stuff throughout the rest of the amp.
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#16
Yeah tranformers that's what I meant, and the 6550s aren't what I like, those r to metal for me, zakk wylde uses those, but don't get a double channel
Alex Hager - AlexHagerMusic
#17
^ that's the first time I've heard of a capacitor being called "too metal".


I wonder if they have "crushing overdrive"


EDIT: shit I knew that but got confused lol


that is quite a ridiculous concept though
Last edited by Tedward at Jul 7, 2010,
#18
6550s are tubes, not caps. Someone describing a capacitor as "metal" sounding would be lulz.
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#19
Dude, SoZos bring teh br00tz.
Everyone is entitled to an opinion.

Feel free to express yours so I can make an informed judgement about how stupid you are.
#21
So it's not killing those fragile harmonics? Totally not br00t4l.
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#22
Quote by Raijouta
That's not why people dislike them, it's because the distortion on the 2205/2210 has diodes which boost the gain. Lots of other amps use diode clipping to get distortion, so I don't see why this is an issue with these 800s.

It's an issue with ALL valve amps that use SS diode clipping. Wtf are you talking about?
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#23
can someone make me a list of all the amps that use ss diode clipping?
I need a hate list

so far I've got
jcm900
blackstar ht5
Jumping on dat gear sig train.
PRS Hollowbody II / BKP Warpigs
Strandberg OS6T / BKP Aftermath
Strandberg OS7 / Lace Poopsticks
Skervesen Raptor 7FF / BKP Warpigs
Skervesen Raptor 6 NTB / BKP Juggernauts
Hapas Sludge 7 FF / Hapas Leviathan
Anderson Baritom / Motorcity Nuke BKP Sinner Anderson H2+
Warmoth Baritone / BKP Piledriver
Ibanez Rg2120x / BKP Nailbomb

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#27
Quote by mmolteratx
The Knucklehead uses it IIRC.


does it? I've heard that but I've never been able to confirm it. Andy Fuchs was saying something to that effect but I haven't seen it on a schem.

I know that it uses a bunch of ss components for the loop, reverb and things like that.
Jumping on dat gear sig train.
PRS Hollowbody II / BKP Warpigs
Strandberg OS6T / BKP Aftermath
Strandberg OS7 / Lace Poopsticks
Skervesen Raptor 7FF / BKP Warpigs
Skervesen Raptor 6 NTB / BKP Juggernauts
Hapas Sludge 7 FF / Hapas Leviathan
Anderson Baritom / Motorcity Nuke BKP Sinner Anderson H2+
Warmoth Baritone / BKP Piledriver
Ibanez Rg2120x / BKP Nailbomb

Blackstar ID:Core Beam
#28
Got a link to the schematic for it AM? Let's have a looksee.
Gilchrist custom
Yamaha SBG500
Telecasters
Randall RM100 & RM20
Marshall JTM45 clone
Marshall JCM900 4102 (modded)
Marshall 18W clone
Fender 5F1 Champ clone
Atomic Amplifire
Marshall 1960A
Boss GT-100


Cathbard Amplification
My band
#30
dude i don't know wtf I'm looking at.

where are the magic gnomes that run around carrying your tone from place to place.
Jumping on dat gear sig train.
PRS Hollowbody II / BKP Warpigs
Strandberg OS6T / BKP Aftermath
Strandberg OS7 / Lace Poopsticks
Skervesen Raptor 7FF / BKP Warpigs
Skervesen Raptor 6 NTB / BKP Juggernauts
Hapas Sludge 7 FF / Hapas Leviathan
Anderson Baritom / Motorcity Nuke BKP Sinner Anderson H2+
Warmoth Baritone / BKP Piledriver
Ibanez Rg2120x / BKP Nailbomb

Blackstar ID:Core Beam
#32
Holy balls, that's a schematic. There are tons of SS switching components, and definitely a SS boost or three, but I'm not seeing clipping diodes right away.
#33
is that the newest knucklehead with only 2 channels. I think the old ones were 3 right.

jeez there is a lot of stuff going on here.

Jumping on dat gear sig train.
PRS Hollowbody II / BKP Warpigs
Strandberg OS6T / BKP Aftermath
Strandberg OS7 / Lace Poopsticks
Skervesen Raptor 7FF / BKP Warpigs
Skervesen Raptor 6 NTB / BKP Juggernauts
Hapas Sludge 7 FF / Hapas Leviathan
Anderson Baritom / Motorcity Nuke BKP Sinner Anderson H2+
Warmoth Baritone / BKP Piledriver
Ibanez Rg2120x / BKP Nailbomb

Blackstar ID:Core Beam
#34
i think the lead boost that's foot switchable is definitely ss.
Jumping on dat gear sig train.
PRS Hollowbody II / BKP Warpigs
Strandberg OS6T / BKP Aftermath
Strandberg OS7 / Lace Poopsticks
Skervesen Raptor 7FF / BKP Warpigs
Skervesen Raptor 6 NTB / BKP Juggernauts
Hapas Sludge 7 FF / Hapas Leviathan
Anderson Baritom / Motorcity Nuke BKP Sinner Anderson H2+
Warmoth Baritone / BKP Piledriver
Ibanez Rg2120x / BKP Nailbomb

Blackstar ID:Core Beam
#35
Apart from the effects loop I see no SS amplification, just a bunch of opto-isolators and a few switching BJTs. No diode clipping that I can see.
Personally I wouldn't use opto's but it is probably the least objectionable usage of a semiconductor.
Gilchrist custom
Yamaha SBG500
Telecasters
Randall RM100 & RM20
Marshall JTM45 clone
Marshall JCM900 4102 (modded)
Marshall 18W clone
Fender 5F1 Champ clone
Atomic Amplifire
Marshall 1960A
Boss GT-100


Cathbard Amplification
My band
#37
i dont see any diode clipping either. what's the merit of using optoisolators anyway? o_o
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#38
the slo uses an optocoupler...is that the same thing?
first i've heard that word used.
it's too confusing. wish I could just stick my cable into the bottom of this power tube.

...
whoops. broke it.
Jumping on dat gear sig train.
PRS Hollowbody II / BKP Warpigs
Strandberg OS6T / BKP Aftermath
Strandberg OS7 / Lace Poopsticks
Skervesen Raptor 7FF / BKP Warpigs
Skervesen Raptor 6 NTB / BKP Juggernauts
Hapas Sludge 7 FF / Hapas Leviathan
Anderson Baritom / Motorcity Nuke BKP Sinner Anderson H2+
Warmoth Baritone / BKP Piledriver
Ibanez Rg2120x / BKP Nailbomb

Blackstar ID:Core Beam
#39
Ah yes, there's 3 pages. Damn it's hard to read in a pdf when there's so many connections. I have to zoom in to read it but then it's too hard/slow to scroll through the page to follow the circuit. I HATE pdf.
Well that boost on the second page isn't always engaged so I could live with that. I have no objection to pedals built into an amp as long as I can bypass them. Opto isolators are sub-optimal but I could live with those too.
Gilchrist custom
Yamaha SBG500
Telecasters
Randall RM100 & RM20
Marshall JTM45 clone
Marshall JCM900 4102 (modded)
Marshall 18W clone
Fender 5F1 Champ clone
Atomic Amplifire
Marshall 1960A
Boss GT-100


Cathbard Amplification
My band
#40
Optocouplers and optoisolators are the same thing. They're in the SLO for the switching system, same as in the Rivera but in a more...judicious sort of way. They're not in the signal path or anything, they just allow you to work with two voltages at once, i.e. the signal and an indicator LED.
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